Aquatic Ecotoxicology (Department of Freshwater and Marine Ecology, IBED, UvA)

The mission of my research line (Aquatic Ecotoxicology) is to assess, monitor and predict the responses of benthic invertebrates to complex environmental changes. Progressively increasing worldwide anthropogenic disturbances shift species to new environmentally defined boundaries. To what extend this leads to changes in community composition and ecosystem functioning depends critically on the ability of each species to cope with a changing environment. Why do some species persist under harsh conditions, where other species fail to maintain viable populations and get, at least locally, extinct? To answer this question benthic invertebrates are subjected to combinations of natural and man made stressors. Experiments typically last for several generations and responses are determined at the gene level (ecotoxicogenomics; genetic adaptation) up to the population and community level. Bridging ecotoxicology and environmental chemistry, the fate and effects of emerging compounds (N-heterocyclic PAC; flame retardants) are studied.

Since 1992, this research line has generated 25 PhD theses (van der Meer, 2023; de Vries, 2021; van der Lee, 2020; De Baat, 2020; de Brouwer 2020, Dos Reis Oliveira; 2019; van Puijenbroek, 2019; Waaijers, 2014; Hunting, 2013; Loayza-Muro, 2013; Marinkovic, 2012; Oyoo-Okoth, 2012; Leon Paumen, 2009; Pieters, 2007; de Haas, 2004; Heugens, 2003; Leslie, 2003; Osano, 2002; Wiegman, 2002; van der Geest, 2001; Ivorra, 2000; Bleeker, 1999; Groenendijk, 1999; Stuijfzand, 1999; Kraak, 1992).

Currently 10 PhD projects are running:

• Mud matters: the significance of effect based sediment quality assessment. (Wieringa, from September 2016).
• Combatting cyanobacteria with hydrogen peroxide. (Weenink, from 2016).
• Psychopharmaceutical Prevention & Pilots to Reduce Effects in the water cycle. (Davey, from June 2020).
• Life-cycle habitat requirements of lowland stream macroinvertebrates. (Becker, from September 2020).
• Environmental fate, bioavailability and bioaccumulation of PFAS. (Gkika, from September 2021).
• Environmental hazard and risk of PFAS. (Xie, from October 2021).
• Temporal variation in toxic pressure in agricultural ditches. (Boonstra, from 2021).
• Natural filtering capacity of aquatic systems. (Bakker, from 2022).
• Drivers of food web structure, stability and resilience in lake Markermeer. (Tack, from 2022).
• Assessing single stressors and stressor interaction in multistressed stream ecosystems. (van Kouwen, from 2022).

Collaboration

Prof. Dr. A.P. van Wezel - Professor Environmental Ecology

Prof. Dr Annemarie van Wezel (1968, MSc Biology UU, PhD environmental chemistry and toxicology UU) is an experienced environmental scientist in water quality, risk assessment, environmental toxicology and chemistry, and environmental policy. She was granted many projects in the field of chemicals of emerging concern and water quality, current examples are the European projects ITN ECORISK2050, ITN PERFORCE3, and Dutch NWO funded projects EMERCHE, RUST, PsychoPharmac’eau, AQUACONNECT and NWO Large Scientific Infrastructure ARISE. She is interested in the science-to-policy interface, in scientific outreach and has ample experience in media appearances. She likes to combine organizational and content roles, and is interested in seeing her science applied within society. She is a member of the Dutch Health Council and the Dutch Board on authorization of plant protection products and biocides CTGB. She holds the chair Environmental Ecology and is Scientific Director of IBED (Institute for Biodiversity and Ecosystem Dynamics) at the University of Amsterdam.

Prof. Dr. J. Huisman - Professor Aquatic Microbial Ecology

Prof. Dr. Ir. P.F.M. Verdonschot - Special chair Wetland Restoration Ecology

Prof. dr. ir. P.(Piet) F.M. Verdonschot received his MSc in Biology (specialization populations/ecosystems) at the Wageningen Agricultural University in 1978. He defended his PhD study entitled ‘Ecological characterization of surface waters in the province of Overijssel (The Netherlands)’ in 1990 at the Wageningen Agricultural University. He holds a special chair in Wetland Restoration Ecoloy at IBED, University of Amterdam. His did research on especially smaller aquatic ecosystems such as streams and ditches, pools and small lakes. His focus is on wetland ecosystem structure and functioning and restoration ecology. He specialized in ecosystem typologies, community studies, assessment, monitoring, restoration,biodiversity, and water and nature development. He did several studies on water policy making, setting standards and societal interaction. He specialized in macro-invertebrates with special expertise on oligochaetes and biting insects. He is experienced with statistical techniques, especially multivariate analyses, in working with field experiments, mescosms and laboratory experimental approaches.

Wetlands are defined as “landscape units of marshes, swamps and surface waters with stagnant or running water, fresh, brackish or salt. The special chair Wetland Restoration Ecology studies the recovery processes of degraded wetlands and on the creation of new wetlands. This is achieved by understanding the functioning of current, restored and newly created wetlands, their driving factors and processes and the biological responses. The study areas are operational landscapes like stream valleys, polders, marshes and swamps adjacent to surface waters. Wetland Restoration Ecology integrates different disciplines of ecology, like population biology (of key species in wetlands), biogeography (distribution patterns at different scales) and stress ecology (especially multistress conditions).

Prof. Dr. Ir. C.A.M. van Gestel - Professor Ecotoxicology of Soil Ecosystems

Cornelis A. M. (Kees) van Gestel is Emeritus Professor of Ecotoxicology of Soil Ecosystems within the Amsterdam Institute for Life and Environment (A-LIFE), section Ecology & Evolution, Faculty of Science of the Vrije Universiteit, Amsterdam. He studied Environmental Sciences at Wageningen University, and started his career in 1981 as a scientific advisor on pesticide risk assessment at the Dutch National Institute of Public Health and the Environment (RIVM). At RIVM he also started his research in soil ecotoxicology. He obtained his PhD from Utrecht University (1991), and moved to the Vrije Universiteit in Amsterdam in 1992. He officially retired on 27th October 2022, but is still connected to the Vrije Universiteit Amsterdam as emeritus professor.

Research

In soil, the bioavailability of chemicals is highly dependent on their interaction with soil particles and the resulting concentrations in the soil pore water. Organisms may affect their exposure by the way they interact with the soil, with some organisms literally eating themselves through the soil while others just walk on it or feed on leaf litter. In soil, pollution rarely is restricted to single chemicals. And life in soil is dynamic, asking for a dynamic approach when assessing the bioaccumulation and effects of chemicals in soil organisms. Finally, effects on single species may have consequences for the soil community and its role in important ecological processes (ecosystem services) like decomposition and nutrient cycling. My research focuses on aspects like bioavailability, routes of exposure, toxicokinetics and toxicodynamics, and mixture toxicity, but also aims at addressing effects at different levels of biological organization. I am studying metals, pesticides, nanoparticles and microplastics, using earthworms, enchytraeids, springtails, oribatid mites and isopods as the test organisms. I am interested in the application of our results in the risk assessment of new and existing chemicals. In addition, I am interested in using ecotoxicological test methods for the effect-based assessment of (contaminated) soils and other substrates.

Teaching

Kees van Gestel was teaching biology, ecology and (eco)toxicology at the Vrije Universiteit, and PhD courses on ecotoxicology and chemical risk assessment at the national and international level. He has been supervising over 40 PhD students and many more undergraduate students. He is winner of the SETAC Europe/Noack-Laboratorien Environmental Education Award 2015.

Dr. J.A. Vonk - Assistant Professor Benthic Ecology

Research interests: Community ecology of benthic systems, focussing on sediment stability and litter processing.

Jan Arie Vonk graduated in 2002 at the University of Groningen at the department of Biology, with specializations towards marine biology and plant ecology. From 2003 to 2008 he worked as PhD student at the Radboud University Nijmegen on nutrient dynamics of seagrass meadows in Indonesia. During this time he conducted fieldwork for 2 years in the Spermonde Archipelago, Sulawesi to study macrophytes and plant-animal interactions using stable isotope techniques. He successfully defended his PhD thesis on 26 May 2008.In 2008 and 2009 he worked as researcher at the National Institute for Public Health and the Environment (RIVM) on topics including ecotoxicology, ecological risk assessment, and aquatic ecology. During this period (2009-2012) he became involved as Post doc in RCiERA (Research Collaboration in Ecological Risk Assessment), a joint project between RU and RIVM, focusing on agroecosystems, nematode communities, food-web relations and ecological stoichiometry. He combined this from 2010-2012 with a Post-doc position at RIVM (joint project with Wageningen University; NWO-ERGO: Ecology Regarding Genetically modified Organisms). Currently he works as Post doc at University of Amsterdam, with teaching and research tasks (benthic ecology and stress ecology; May 2012 onwards).

Dr. T.L. ter Laak - Senior Researcher Chemical Water Quality

As a senior researcher in Chemical Water Quality, Thomas ter Laak is concerned with the sources, monitoring, behavior, occurrence and modeling of (new) micro-pollutants in the water chain. Over the past decade, Thomas has conducted research into various substances, including medicines and their transformation products. In addition, he and colleagues have been conducting research into illegal drugs in wastewater (waste water based epidemiology) since 2018. Thomas works one day a week as an associate professor at the University of Amsterdam (IBED), where he provides education and supervises research in the field of environmental chemistry. Thomas is also involved as a guest lecturer at Utrecht University and supervises research at Wageningen University & Research.

Dr. H.G. van der Geest - Assistant Professor Benthic Ecoloy

The mission of this research line is to understand the biocomplexity at the sediment water interface. This complexity arises from the multitude of biological, physical and chemical processes that sustain and modify benthic life formed by compact consortia of specialized micro-algae, bacteria and (burrowing) invertebrates. Individual organisms, populations of species and multi-trophic consortia depend on, interact with and adapt to a-biotic processes, such as diffusion of oxygen, and sedimentation of silt and detritus. Simultaneously, biota modifies also these processes through their activities and natural conditions are strongly modified by man-made perturbation. The sequestration of organic matter and nutrients in sediments - for example - is tightly bound to the activity of benthic organisms and a large variety of contaminants is being deposited and partly biologically degraded in sediments. Another key process - with important consequences for water clarity - is the partitioning of particles between the water phase and solid deposits. Communities of phototrophic and heterotrophic species co-act in the process of stabilization and transformation of materials.

Dr. M.L. de Baat - Assistant Professor Water Quality & Ecotoxicology

Milo de Baat is Assistant Professor in Water Quality & Ecotoxicology at the Department of Freshwater and Marine Ecology of the Institute for Biodiversity and Ecosystem Dynamics at the University of Amsterdam. He previously worked as a scientific researcher in the Chemical Water Quality & Health group at KWR Water Research Institute. Milo's research explores how chemical pollution affects the health of aquatic ecosystems. Water is essential to life, but the increasingly complex chemical burden that human activities impose on freshwater and marine environments negatively impacts the biodiversity and functioning of aquatic ecosystems and threatens the provision of clean and safe water for human use and consumption. By combining innovative sampling methods and effect-based toxicity assessment, Milo's research aims to unravel the complexity and toxic effects of chemical mixtures in the environment. By aligning these findings with knowledge of biodiversity and ecosystem functioning, he strives to quantify the limitations that chemical pollution imposes on environmental health in a variety of aquatic ecosystems.

Antonia Praetorius - Assistant Professor Environmental Chemistry

I am an assistant professor in Environmental Chemistry at the Department of Ecosystem & Landscape Dynamics (ELD) at the Institute for Biodiversity and Ecosystem Dynamics (IBED). Previously I worked as a Researcher at Stockholm University (Sweden) and as a Postdoc at the University of Vienna (Austria). I studied chemistry and obtained my PhD from ETH Zurich (Switzerland).

My research interests centre around assessing the environmental fate of emerging chemical contaminants. I am particularly interested in understanding how the fundamental physical and chemical properties of a contaminant drive its transformation and transport behaviour in aquatic and terrestrial environments and how we can utilise this understanding to build models for predicting contaminant fate and concentrations. I have a strong expertise in particulate contaminants, such as engineered nanomaterials, nano- and microplastics and microfibers. Additionally, I am working on (persistent) organic contaminants, such as PFAS and (psycho)pharmaceuticals, as well as emerging contaminants in circular systems (such as wastewater reuse).  I very much enjoy working in interdisciplinary teams and I am convinced that addressing potential risks and designing effective mitigation strategies or regulations for emerging contaminants requires joint forces from different disciplines. 

In our projects we combine modelling approaches with laboratory-based studies on contaminant fate processes (e.g. degradation/transformation, aggregation, sedimentation). We also work towards improving analytical methods for identifying emerging contaminants in different environmental matrices. 

More information on ongoing projects

µPLANET – Microplatic Long-range transport Assessment aNd Estimation Tools: together with Marianne Seijo we are developing a global-scale multimedia fate and transport model for microplastics and their additives. Our model is based on the Full Multi, an open-source framework for modelling the transport and fate of nano- and microplastics in aquatic systems, developed previously with Prado Domercq and Matthew MacLeod from Stockholm University (find the code on GitHub: Full Multi GitHub repository). 

We are also contributing to developing an open-source unit world multimedia modeling platform for microplastics in the environment in the UTOPIA project and to better understanding and modelling micro- and nanoplastic fragmentation in the FRAGMENT-MNP project. 

META – Citizen Science for Microfiber Detection: together with Lies Jacobs, Bernou Boven, Cameron Brick and interested Dutch citizens we are investigating the factors that drive the release of synthetic microfibers—one of the most frequently detected forms of microplastics in the environment—from washing of textiles in real households. If you are interested in participating, check out our website for more information: https://www.meta-citizenscience.nl/.

Dr. P.M. Visser - Associate Professor of Algal Ecophysiology

Dr. T.V. van der Meer - Junior Researcher Aqutic Ecology

Dr. S.T.J. Droge - Senior Researcher Environmental Chemistry

Dr. Ir. I. Roessink -  Senior Researcher Aquatic Ecotoxicology

Dr. R.C.M. Verdonschot - Senior Researcher Aquatic Ecology

Publication list (n = 150; WOS h = 36; c = 4700; GS n= 195; h = 51; c = 7593)

• Becker, E., J.A. Vonk, P.F.M. Verdonschot and M.H.S. Kraak. Species specific responses to anthropogenic stressors hamper Trichoptera recovery in an urbanised landscape. Submitted.
• De Baat, M.L., D.M. Narain-Ford, J. de Weert, D. Giesen, H. Beeltje, T. Hamers, R. Helmus, P. de Voogt and M.H.S. Kraak. Passive sampler housing and sorbent type determine polar micropollutant adsorption and subsequent bioassay responses. Submitted.
• Boonstra, H., M.L. de Baat, F. van der Meer, I. Roessink and M.H.S. Kraak. Temporal variation of ecotoxicological risks in agricultural waterbodies. Submitted.
• De Groot, C.W.E., P.L.A. van Vlaardingen, T. Aldenberg, C.E. Smit, E.M.J. Verbruggen and M.H.S. Kraak. Incorporating censored data into species sensitivity distributions: a case study on deriving environmental quality standards for free cyanide. Submitted.

• Hendriks, L., T.V. van der Meer, M.H.S. Kraak, P.F.M. Verdonschot, A.J.P. Smolders, L.P.M. Lamers and A.J. Veraart. Sludge degradation, nutrient removal and reduction of greenhouse gas emission by a Chironomus-Azolla wastewater treatment cascade. PLoS ONE. In press.
• Van Kouwen, L.A.H., M.H.S. Kraak, G.H. van der Lee and P.F.M. Verdonschot, 2024. Four decades of region- and species-specific trends in lowland stream Ephemeroptera abundance. Sci. Total Environ. 924: 171619.
• Wieringa, N., S.T.J. Droge, T.L. ter Laak, A.A.K. Nair, K. Walker, P.F.M. Verdonschot and M.H.S. Kraak, 2024. Combining passive sampling and dosing to unravel the contribution of hydrophobic organic contaminants to sediment ecotoxicity. Environ. Sci. Technol. 58: 269-279.

• Gkika, I.S., G. Xie, C.A.M. van Gestel, T.L. ter Laak, J.A. Vonk, A.P. van Wezel and M.H.S. Kraak, 2023. Research priorities for the environmental risk assessment of per- and polyfluorinated substances (PFAS). Environ. Toxicol. Chem. 42(11): 2302-2316.
• De Vries, J., M.H.S. Kraak and P.F.M. Verdonschot, 2023. Complementarity of community indices in characterizing aquatic macroinvertebrate assemblages. Glob. Ecol. Conserv. 46: e02604.
• Van der Meer, T.V., C.J.E. Davey, P.F.M. Verdonschot and M.H.S. Kraak, 2023. Removal of nutrients from WWTP effluent by an algae-mussel trophic cascade. Ecol. Eng. 190: 106930.
• Wieringa, N., S.T.J. Droge, A.M. Bakker, R.A. Melkert, B.J. Prast, P.F.M. Verdonschot and M.H.S. Kraak, 2023. Enlarging the arsenal of test species for sediment quality assessment. Bull. Environ. Contam. Toxicol. 110: 55.
• Weenink, E.F.J., M.H.S. Kraak, C. van Teulingen, S. Kuijt, M.J. van Herk, C.A.M. Sigon, T. Piel, G. Sandrini, M. Leon-Grooters, M.L. de Baat, J. Huisman and P.M. Visser, 2022. Sensitivity of phytoplankton, zooplankton and macroinvertebrates to hydrogen peroxide treatments of cyanobacterial blooms. Water Res. 225: 119169.
• Davey, C.J.E, M.H.S. Kraak, A. Praetorius, T.L. ter Laak and A.P. van Wezel, 2022. Occurrence, hazard, and risk of psychopharmaceuticals and Illicit drugs in European surface waters. Water Res. 222: 118878.
• Van der Meer, T.V., P.F.M. Verdonschot, L. van Eck, D. Narain-Ford and M.H.S. Kraak, 2022. Wastewater treatment plant contaminant profiles affect macroinvertebrate sludge degradation. Water Res. 222: 118863.
• Wieringa, N., G.H. van der Lee, M.L. de Baat, M.H.S. Kraak and P.F.M. Verdonschot, 2022. Contribution of sediment contamination to multi-stress in lowland waters. Sci. Total Environ. 844: 157045.
• Van der Meer, T.V., P.F.M. Verdonschot, L. Dokter, S. Absalah and M.H.S. Kraak, 2022. Organic matter degradation and redistribution of sediment associated contaminants by benthic invertebrate activities. Environ. Pollut. 306: 119455.
• Van Puijenbroek, P.J.T.M., A.D. Buijse, M.H.S. Kraak and P.F.M. Verdonschot, 2021. Through the dam into troubled waters: combined effects of stream fragmentation, habitat deterioration, and poor water quality on lowland stream fish distribution. River Res. Appl. 37(7): 1016-1024.
• De Vries, J., M.H.S. Kraak, R.A. Skeffington, A.J. Wade and P.F.M. Verdonschot, 2021. A Bayesian network to simulate macroinvertebrate responses to multiple stressors in lowland streams. Water Res. 194: 116952.
• Vonk, J.A. and M.H.S. Kraak, 2021. Herbicide exposure and toxicity to aquatic primary producers. Rev. Environ. Contam. Toxicol. 250: 119-171.
• Van der Lee, G.H., J.A. Vonk, R.C.M. Verdonschot, M.H.S. Kraak, P.F.M. Verdonschot and J. Huisman, 2021. Eutrophication induces shifts in the trophic position of invertebrates in aquatic food webs. Ecology 102(3): e03275.
• Van der Lee, G.H., M.L. de Baat, N. Wieringa, M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Structural and functional assessment of multi-stressed lowland waters. Freshw. Sci. 39(4): 621-634.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Species composition drives macroinvertebrate community classification. Ecol. Indic. 119: 106780.
• De Baat, M.L., R. van der Oost, G.H. van der Lee, N. Wieringa, T. Hamers, P.F.M.  Verdonschot, P. de Voogt and M.H.S. Kraak, 2020. Advancements in effect-based surface water quality assessment. Water Res. 183, 116017.
• De Vries, J., M.H.S. Kraak and P.F.M. Verdonschot, 2020. A conceptual model for simulating responses of freshwater macroinvertebrate assemblages to multiple stressors. Ecol. Indic. 117: 106604.
• Dos Reis Oliveira, P.C., H.G. van der Geest, M.H.S. Kraak, J.J. Westveer, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Over forty years of lowland stream restoration: lessons learned? J. Environ. Manage. 264: 110417.
• Van der Lee, G.H., C. Desjonquères, J. Sueur, M.H.S. Kraak and P.F.M. Verdonschot, 2020. Freshwater ecoacoustics: listening to the ecological status of multi-stressed lowland waters. Ecol. Indic. 113: 106252.
• Van der Lee, G.H., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Persist or perish: critical life stages determine the sensitivity of invertebrates to disturbances. Aquat Sci. 82: 24.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, M. Pena-Ortiz, H.G. van der Geest and P.F.M. Verdonschot, 2020. Responses of macroinvertebrate communities to land use specific sediment food and habitat characteristics in lowland streams. Sci. Total Environ. 703: 135060.
• Albergamo, V., B.I. Escher, E.L. Schymanski, R. Helmus, M.L. Dingemans, E.R. Cornelissen, M.H.S. Kraak, J. Hollender and P. De Voogt, 2020. Evaluation of reverse osmosis drinking water treatment of riverbank filtrate using bioanalytical tools and non-target screening. Environ. Sci. Water Res. Technol. 6: 103-116.
• Van der Lee, G.H., E.R. Hunting, J.A. Vonk and M.H.S. Kraak, 2020. Decomposition and consumption tablets (DECOTABs). In: Methods to study litter decomposition 2^nd edition (F. Bärlocher, M.O. Gessner and M.A.S. Graça, (Eds.)). Springer. pp: 519-525.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2019. Quantifying cumulative stress acting on macroinvertebrate assemblages in lowland streams. Sci. Total Environ. 694: 133630.
• Dos Reis Oliveira, P.C., H.G. van der Geest, M.H.S. Kraak and P.F.M. Verdonschot, 2019. Land use affects lowland stream ecosystems through dissolved oxygen regimes. Sci. Rep. 9: 19685.
• De Baat, M.L., N. Wieringa, S.T.J. Droge, B.G. van Hall, F. van der Meer and M.H.S. Kraak, 2019. Smarter sediment screening: Effect-based quality assessment, chemical profiling, and risk identification. Environ. Sci. Technol. 53: 14479-14488.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, P.F.M. Verdonschot and R.C.M. Verdonschot, 2019. Lowland stream restoration by sand addition: impact, recovery and beneficial effects on benthic invertebrates. River Res. Appl. 35(7): 1023-1033.
• De Baat, M.L., M.H.S. Kraak, R. van der Oost, P. de Voogt and P.F.M. Verdonschot, 2019. Effect-based nationwide surface water quality assessment to identify ecotoxicological risks. Water Res. 159: 434-443.
• De Brouwer, J.H.F., M.H.S. Kraak, A.A. Besse-Lototskaya and P.F.M. Verdonschot, 2019. The significance of refuge heterogeneity for lowland stream caddisfly larvae to escape from drift. Sci. Rep. 9: 2140.
• Van Puijenbroek, P.J.T.M., A.D. Buijse, M.H.S. Kraak and P.F.M. Verdonschot, 2019. Species and river specific effects of river fragmentation on European anadromous fish species. River Res. Appl. 35(1): 68-77.
• Michielsen, R.J., J. Shamoun-Baranes, J.R. Parsons and M.H.S. Kraak, 2019. A non-destructive method to identify POP contamination sources in omnivorous seabirds. Rev. Environ. Contam. Toxicol. 246: 65-89.
• Legradi, J.B., C. Di Paolo, M.H.S. Kraak, H.G. van der Geest, E.L. Schymanski, A.J. Williams, M.M.L. Dingemans, R. Massei, W. Brack, X. Cousin, M-L. Begout, R. van der Oost, A. Carion, V. Suarez-Ulloa, F. Silvestre, B.I. Escher, M. Engwall, G. Nilén, S.H. Keiter, D. Pollet, P. Waldmann, C. Kienle, I. Werner, A-C. Haigis, D. Knapen, L. Vergauwen, M. Spehr, W. Schulz, W. Busch, D. Leuthold, S. Scholz, C.M. vom Berg, N. Basu, C.A. Murphy, A. Lampert, J. Kuckelkorn, T. Grummt, H. Hollert, 2018. An ecotoxicological view on neurotoxicity assessment. Environ. Sci. Eur. 30: 46.
• Van der Lee, G.H., R.C.M. Verdonschot, M.H.S. Kraak and P.F.M. Verdonschot, 2018. Dissolved oxygen dynamics in drainage ditches along a eutrophication gradient. Limnologica. 72: 28-31.
• De Baat, M.L., D.A. Bas, S.A.M. van Beusekom, S.T.J. Droge, F. van der Meer, M. de Vries, P.F.M. Verdonschot and M.H.S. Kraak, 2018. Nationwide screening of surface water toxicity to algae. Sci. Total Environ. 645: 780-787.
• Hammer, J., A.M. Tukker, J.F. Postma, J.J.-H. Haftka, J.L.M. Hermens, P. de Voogt and M.H.S. Kraak, 2018. Solubility constraints on aquatic ecotoxicity testing of anionic surfactants. Bull. Environ. Contam. Toxicol. 101: 99-104.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, H.G. van der Geest, S. Naranjo and P.F.M. Verdonschot, 2018. Sediment composition mediated land use effects on lowland streams ecosystems. Sci. Total Environ. 631–632: 459–468.
• Brock, T.C.M., J.D.M. Belgers, M.-C. Boerwinkel, L. Jollie, M.H.S. Kraak, M.J. Papo, J.A. Vonk and I. Roessink, 2018. Toxicity of sediment-bound lufenuron to benthic arthropods in laboratory bioassays. Aquat. Toxicol. 198: 118-128.
• Van der Meer, T.V., M.L. de Baat, P.F.M. Verdonschot and M.H.S. Kraak, 2017. Benthic invertebrate bioturbation activity determines species specific sensitivity to sediment contamination. Front. Environ. Sci. 5:83.
• Van der Lee, G.H., M.H.S. Kraak, R.C.M. Verdonschot, J.A. Vonk and P.F.M. Verdonschot, 2017. Oxygen drives benthic-pelagic decomposition pathways in shallow wetlands. Sci. Rep. 7: 15051.
• De Brouwer, J.H.F., A.A. Besse-Lototskaya, C.J.F. Ter Braak, M.H.S. Kraak, P.F.M. Verdonschot, 2017. Flow velocity tolerance of lowland stream caddisfly larvae (Trichoptera). Aquat. Sci. 79: 419-425.
• Vonk, J.A., B.F. van Kuijk, M. Van Beusekom, E.R. Hunting and M.H.S. Kraak, 2016. The significance of linoleic acid in food sources for detritivorous benthic invertebrates. Sci. Rep. 6: 35785.
• Brock, T.C.M., D.A. Bas, J.D.M. Belgers, L. Bibbe, M.-C. Boerwinkel, S.J.H. Crum, N. Diepens, M.H.S. Kraak, J.A. Vonk and I. Roessink, 2016. Effects of sediment-spiked lufenuron on benthic macroinvertebrates in outdoor microcosms and single-species toxicity tests. Aquatic Toxicol. 177: 464-475.
• Lavtizar, V., K. Berggren, P. Trebše, M.H.S. Kraak, R.A. Verweij and C.A.M. van Gestel, 2016. Comparative ecotoxicity of chlorantraniliprole to non-target soil invertebrates. Chemosphere 159: 473-479.
• Hunting, E.R., J.A. Vonk, C.J.M. Musters, M.H.S. Kraak and M.G. Vijver, 2016. Effects of agricultural practices on organic matter degradation in ditches. Sci. Rep. 6: 21474.
• Sjollema, S.B., P. Redondo‐Hasselerharm, H.A. Leslie, M.H.S. Kraak and A.D. Vethaak, 2016. Do plastic particles affect microalgal photosynthesis and growth? Aquatic Toxicol. 170: 259-261.
• Barmentlo, S.H., J.M. Stel, M. van Doorn, C. Eschauzier, P. de Voogt and M.H.S. Kraak, 2015. Acute and chronic toxicity of short chained perfluoroalkyl substances to Daphnia magna. Environ. Pollut. 198: 47-53.
• Hunting. E.R., M.G. Vijver, H.G. van der Geest, C. Mulder, M.H.S. Kraak, A.M. Breure and W. Admiraal, 2015. Resource niche overlap promotes stability of bacterial community metabolism in experimental microcosms. Frontiers in Microbiology - Aquatic Microbiology 6: 105 (1-7).
• Lavtizar, V., R. Helmus, S.A.E. Kools, D. Dolenc, C.A.M. van Gestel, P. Trebše, S.L. Waaijers and M.H.S. Kraak, 2015. Daphnid life cycle responses to the insecticide chlorantraniliprole and its transformation products. Environ. Sci. Technol. 49: 3922-3929.
• Jurgens, S.S., R. Helmus, S.L. Waaijers, D. Uittenbogaard, D. Dunnebier, M. Vleugel, M.H.S. Kraak, P. de Voogt and J.R. Parsons, 2014. Mineralisation and primary biodegradation of aromatic organophosphorous flame retardants in activated sludge. Chemosphere 111: 238-242.
• Loayza-Muro, R.A., M.L. de Baat, E.J. Palomino, P. Kuperus, M.H.S. Kraak, W. Admiraal and J.A.J. Breeuwer, 2014. Metals and altitude drive genetic diversity of chironomids in Andean streams. Freshwater Biol. 59: 56-63.
• Loayza-Muro, R.A., J.F. Duivenvoorden, M.H.S. Kraak and W. Admiraal, 2014. Metal leaching, acidity and altitude confine benthic macroinvertebrate community composition in Andean streams. Environ. Toxicol. Chem. 33(2): 404-411.
• Sjollema, S.B., G. Martínez-García, H.G. van der Geest, M.H.S. Kraak, P. Booij, A.D. Vethaak and W. Admiraal, 2014. Hazard and risk of herbicides for marine microalgae. Environ. Pollut. 187: 106-111.
• Hunting, E.R., C.M. White, M. van Gemert, D. Mes, E. Stam, H.G. van der Geest, M.H.S. Kraak and W. Admiraal, 2013. UV radiation and organic matter composition shape bacterial functional diversity in sediments. Front. Microbiol. 4: 317(1-5).
• Hunting, E.R., O. Franken, F. Knopperts, M.H.S. Kraak, R. Vargas, W.F.M. Rolling and H.G. van der Geest, 2013. Substrate as a driver of sponge distributions in mangrove ecosystems. Mar. Ecol. Prog. Ser. 486: 133-141.
• Hunting, E.R., S.M. Ubels, M.H.S. Kraak and H.G. van der Geest, 2013. Root-derived organic matter confines sponge community composition in mangrove ecosystems. Ecol. Proces. 2013(2): 14(1-4).
• Hunting, E.R., C. Mulder, M.H.S. Kraak, AM. Breure and W. Admiraal, 2013. Effects of copper on invertebrate-sediment interactions. Environ. Pollut. 180: 131-135.
• Loayza-Muro, R.A., J.K. Marticorena-Ruiz, E.J. Palomino, C. Merritt, J.A.J. Breeuwer, P. Kuperus, M.H.S. Kraak and W. Admiraal, 2013. UV-B driven pigmentation and genetic diversity of benthic macroinvertebrates from high-altitude Andean streams. Freshwater Biol. 58: 1710-1719.
• Loayza-Muro, R.A., J.K. Marticorena-Ruiz, E.J. Palomino, C. Merritt, M.L. De Baat, M. Van Gemert, R.A. Verweij, M.H.S. Kraak and W. Admiraal, 2013. Persistence of chironomids in metal polluted Andean high altitude streams: does melanin play a role? Environ. Sci. Technol. 47: 601-607.
• Oyoo-Okoth, E., W. Admiraal, O. Osano, D. Manguya-Lusega, V. Ngure, M.H.S. Kraak, V. Chepkirui-Boit and J. Makwali, 2013. Contribution of soil, water and food consumption to metal exposure of children from geological enriched environments in the coastal zone of Lake Victoria, Kenya. Int. J. Hyg. Envir. Heal. 216: 8-16.
• Waaijers, S.L., T.E. Bleyenberg, A. Dits, M. Schoorl, J. Schütt, S.A.E. Kools, P. de Voogt, W. Admiraal, J.R. Parsons and M.H.S. Kraak, 2013. Daphnid life cycle responses to new generation flame retardants. Environ. Sci. Technol. 47: 13798-13803.
• Waaijers, S.L., J. Hartmann, A.M. Soeter, R. Helmus, S.A.E. Kools, P. de Voogt, W. Admiraal, J.R. Parsons and M.H.S. Kraak, 2013. Toxicity of new generation flame retardants to Daphnia magna. Sci. Total. Environ. 463-464: 1042-1048.
• Waaijers, S.L., D. Kong, H.S. Hendriks, C.A. de Wit, I.T. Cousins, R.H.S. Westerink, P.E.G. Leonards, M.H.S. Kraak, W. Admiraal, P. de Voogt and J.R. Parsons, 2013. Persistence, bioaccumulation and toxicity of halogen-free flame retardants. Rev. Environ. Contam. Toxicol. 222: 1-71.
• De Baat, M.L., M. van Gemert, R.A. Verweij,  R.A Loayza-Muro and M.H.S. Kraak, 2012. Combined effects of Cu and UVR on survival and melanin synthesis in Chironomus riparius larvae. Proc. Neth. Entomol. Soc. Meet. 23:39-48.
• Di Veroli, A., E. Goretti, M. Leόn Paumen, M.H.S. Kraak and W. Admiraal, 2012. Induction of mouthpart deformities in chironomid larvae exposed to contaminated sediments. Environ. Pollut. 166: 212-217.
• Hammer, J., M.H.S. Kraak and J.R. Parsons, 2012. Plastics in the marine environment: the dark side of a modern gift. Facts, problems and solutions for plastics in the marine environment. Rev. Environ. Contam. Toxicol. 220: 1-44.
• Hernandez-Leal, L., A.M. Soeter, S.A.E. Kools, M.H.S. Kraak, J.R. Parsons, H. Temmink, G. Zeeman and C.J.N. Buisman, 2012. Ecotoxicological assessment of grey water treatment systems with Daphnia magna and Chironomus riparius. Water Res. 46: 1038-1044.
• Hunting, E.R., M.H. Whatley, H.G. van der Geest, C. Mulder, M.H.S. Kraak, A.M. Breure and W. Admiraal, 2012. Invertebrate footprints on detritus processing, bacterial community structure and spatiotemporal redox profiles. Freshwater Sci. 31(3): 724-732.
• Kampfraath A.A., E.R. Hunting, C. Mulder, A.M. Breure, M.O. Gessner, M.H.S. Kraak and W. Admiraal, 2012. DECOTAB – a multipurpose standard substrate to assess effects of litter quality on microbial decomposition and invertebrate consumption. Freshwater Sci. 31(4): 1156-1162.
• Marinkovic, M., K. de Bruijn, M. Asselman, M. Bogaert, M.J. Jonker, M.H.S. Kraak and W. Admiraal, 2012. Response of the nonbiting midge Chironomus riparius to multigeneration toxicant exposure. Environ. Sci. Technol. 46: 12105-12111.
• Marinkovic, M., W.C. de Leeuw, M. de Jong, M.H.S. Kraak, W. Admiraal, T.M. Breit and M.J. Jonker, 2012. Combining next-generation sequencing and microarray technology into a transcriptomics approach for the non-model organism Chironomus riparius. PLoS ONE 7(10): e48096.
• Marinkovic, M., W.C. de Leeuw, W.A. Ensink, M. de Jong, T.M. Breit, W. Admiraal, M.H.S. Kraak and M.J. Jonker, 2012. Gene expression patterns and life cycle responses of toxicant-exposed chironomids. Environ. Sci. Technol. 46: 12679-12686.
• Oyoo-Okoth, E., W. Admiraal, O. Osano, M.H.S. Kraak, J. Gichuki and C. Ogwai, 2012. Parasites modify sub-cellular partitioning of metals in the gut of fish. Aquat. Toxicol. 106-107: 76-84.
• Oyoo-Okoth, E., W. Admiraal, O. Osano and M.H.S. Kraak, 2012. Element profiles in hair and nails of children reflect the uptake from food and the environment. Environ. Toxicol. Chem. 31(7): 1461-1469.
• Oyoo-Okoth, E., W. Admiraal, O. Osano, M.H.S. Kraak, P.J.A. Were-Kogogo, J. Gichuki, V. Ngure, J. Makwali and C. Ogwai, 2012. Dynamics of metal uptake and depuration in a parasitized cyprinid fish ( Rastrineobola argentea). Aquat. Toxicol. 124-125: 34-40.
• Marinkovic, M., R.A. Verweij, G.A. Nummerdor, M.J. Jonker, M.H.S. Kraak and W. Admiraal, 2011. Life cycle responses of the midge Chironomus riparius to compounds with different modes of action. Environ. Sci. Technol. 45: 1645-1651.
• Cerbin, S., M.H.S. Kraak, P. de Voogt, P.M. Visser and E. van Donk, 2010. Combined and single effects of pesticide carbaryl and toxic Microcystis aeruginosa on the life history of Daphnia  pulicaria. Hydrobiologia 643: 129-138.
• Loayza-Muro, R.A., R. Elías-Letts, J.K. Marticorena-Ruiz, E.J. Palomino, J.F. Duivenvoorden, M.H.S. Kraak and W. Admiraal, 2010. Metal-induced shifts in benthic macroinvertebrate community composition in Andean high altitude streams. Environ. Toxicol. Chem. 29(12): 2761-2768.
• Marinkovic, M. and M.H.S. Kraak, 2010. Development of an easily made artificial sediment that reduces experimental variability. Proc. Neth. Entomol. Soc. Meet. 21: 95-101.
• Oyoo-Okoth, E., W. Admiraal, O. Osano, L. Hoitinga and M.H.S. Kraak, 2010. Metal specific partitioning in a parasite-host assemblage of the cestode Ligula intestinalis and the cyprinid fish Rastreneobola argentea. Sci. Total. Environ. 408: 1557-1562.
• Oyoo-Okoth, E., W. Admiraal, O. Osano, V. Ngure, M.H.S. Kraak and E.S. Omutange, 2010. Monitoring exposure to heavy metals among children in Lake Victoria, Kenya: environmental and fish matrix. Ecotox. Environ. Safe. 73: 1797-1803.
• Soeter, A.M., F.A.A. Bakker, M. Velthuis, R.A. Verweij, L. Hoitinga, M. Marinkovic, M.H.S. Kraak and J.A.J. Breeuwer, 2010. The selective environment: genetic adaptation of the midge Chironomus riparius to metal pollution. Proc. Neth. Entomol. Soc. Meet. 21: 85-94.
• Van der Grinten, E., M.G. Pikkemaat, E.J. van den Brandhof, G.J. Stroomberg and M.H.S. Kraak, 2010. Comparing the sensitivity of algal, cyanobacterial and bacterial bioassays to different groups of antibiotics. Chemosphere 80: 1-6.
• Baas, J., J. Willems, T. Jager, M.H.S. Kraak, T. Vandenbrouck and S.A.L.M. Kooijman, 2009. Prediction of daphnid survival after in situ exposure to complex mixtures. Environ. Sci. Technol. 43: 6064-6069.
• Boonstra, M., M. Asselman, P. Maas, R.A. Verweij, J.A.J. Breeuwer and M.H.S. Kraak, 2009. Persistence of chironomids in metal polluted environments. Proc. Neth. Entomol. Soc. Meet. 20: 9-15.
• Leon Paumen, M., P. de Voogt, C.A.M. van Gestel and M.H.S. Kraak, 2009. Comparative chronic toxicity of homo- and heterocyclic aromatic compounds to benthic and terrestrial invertebrates: generalizations and exceptions. Sci. Total. Environ. 407: 4605-4609.
• Van der Meuelen, M., J. Vos, W. Verweij and M.H.S. Kraak, 2009. Effecten van exotische rivierkreeften op de KRW-maatlatscores. H2O 42(14/15):41-43.
• De Haas, E.M. and M.H.S. Kraak, 2008. Species-specific responses of two benthic invertebrates explain their distribution along environmental gradients in freshwater habitats. Sci. Total. Environ. 406: 430-435.
• Klok, C. and M.H.S. Kraak, 2008. Living in highly dynamic polluted river floodplains, do contaminants contribute to population and community effects? Sci. Total. Environ. 406: 455-461.
• Leon Paumen, M., E. Steenbergen, M.H.S. Kraak, Nico M. van Straalen and C.A.M. van Gestel, 2008. Multigeneration exposure of the springtail Folsomia candida to phenanthrene: from dose-response relationships to treshold concentrations. Environ. Sci Technol. 42: 6985-6990.
• Leon Paumen, M., P. Stol, T.L. ter Laak, M.H.S. Kraak, C.A.M. van Gestel and W. Admiraal, 2008. Chronic exposure of the Oligochaete Lumbriculus variegatus to Polycyclic Aromatic Compounds (PACs): bioavailability and effects on reproduction. Environ. Sci. Technol. 42: 3434-3440.
• Leon Paumen, M., E. Borgman, M.H.S. Kraak, C.A.M. van Gestel and W. Admiraal, 2008. Life cycle responses of the midge Chironomus riparius to polycyclic aromatic compound exposure. Environ. Pollut. 152: 225-232.
• Pieters, B.J., D. Bosman-Meijerman, E. Steenbergen, E.J. van den Brandhof, P. van Beelen, E. van der Grinten, W. Verweij and M.H.S. Kraak, 2008. Ecological quality assessment of Dutch surface waters using a new bioassay with the cladoceran Chydorus sphaericus. Proc. Neth. Entomol. Soc. Meet. 19:157-164.
• Van der Grinten, E., W. Admiraal and M.H.S. Kraak, 2008. Periodic flooding restrains local succession of microphytobenthos in floodplain lakes. Fund. Appl. Limnol. 173(3): 227-236.
• Boivin, M.E.Y., G.D. Greve, J.V. García-Meza, B. Massieux, W. Sprenger, M.H.S. Kraak, A.M. Breure, M. Rutgers and W. Admiraal, 2007. Algal-bacterial interactions in metal contaminated floodplain sediments. Environ. Pollut. 145: 884-894.
• De Haas, E.M., C. Wagner, A.A. Koelmans, M.H.S. Kraak and W. Admiraal, 2006. Habitat selection by chironomid larvae: fast growth requires fast food. J. Animal. Ecol. 75(1): 148-155.
• Dekker, T., G.D. Greve, T.L. ter Laak, M.E. Boivin and B. Veuger, G. Gortzak, S. Dumfries, S.M.G. Lücker, M.H.S. Kraak, W. admiraal and H.G. van der Geest, 2006. Development and application of a sediment toxicity test using the benthic cladoceran Chydorus sphaericus. Environ. Pollut. 140: 231-238.
• Droge, S.T.J., M. Leon Paumen, E.A.J. Bleeker, M.H.S. Kraak and C.A.M. van Gestel, 2006. Chronic toxicity of polycyclic aromatic compounds to the springtail Folsomia candida and the enchytraeid Enchytraeus cripticus. Environ. Toxicol. Chem. 25(9): 2423-2431.
• Heugens, E.H.W., L.T.B. Tokkie, M.H.S. Kraak, A.J. Hendriks, N.M. van Straalen and W. Admiraal, 2006. Population growth of Daphnia magna under multiple stress conditions - joint effects of temperature, food and cadmium. Environ. Toxicol. Chem. 25(5): 1399-1407.
• Pieters, B.J., T. Jager, M.H.S. Kraak and W. Admiraal, 2006. Modeling responses of Daphnia magna to pesticide pulse exposure under varying food conditions: intrinsic versus apparent sensitivity. Ecotoxicology 15: 601-608.
• De Haas, E.M., R. van Haaren, A.A. Koelmans, M.H.S. Kraak and W. Admiraal, 2005. Analyzing the causes for the persistence of chironomids in floodplain lake sediments. Arch. Hydrobiol. 162(2): 211-228.
• De Haas, E.M., M.H.S. Kraak, A.A. Koelmans and W. Admiraal, 2005.  The impact of sediment reworking by opportunistic chironomids on specialised mayflies. Freshwater Biol. 50: 770-780.
• De Haas, E.M., I. Roessink, B. Verbree, A.A. Koelmans, M.H.S. Kraak and W. Admiraal, 2005. The influence of sediment quality on the responses of benthic invertebrates after treatment with the fungicide Triphenyltin acetate. Environ. Toxicol. Chem. 24(5): 1133-1139.
• Leon Paumen, M., S. Droge, E.A.J. Bleeker, M.H.S. Kraak, C.A.M. van Gestel, W. Admiraal and N.M. van Straalen, 2005. Chronic toxicity of PACs to the soil invertebrates Folsomia candida (Collembola) and Enchytraeus crypticus (Oligochaeta). Proc. 20th Int. Symp. on Polycyclic Aromatic Compounds pp 2417-2430. 
• Pieters, B.J., A. Paschke, S. Reynaldi, M.H.S. Kraak, W. Admiraal and M. Liess, 2005. Influence of food limitation on the effects of Fenvalerate pulse exposure on the life history and population growth rate of Daphnia magna. Environ. Toxicol. Chem. 24(9): 2254-2259.
• De Haas, E.M., M. Leon Paumen, A.A. Koelmans and M.H.S. Kraak, 2004. Combined effects of copper and food on the midge Chironomus riparius in whole sediment bioassays. Environ. Pollut. 127: 99-107.
• Leslie, H.A., J.L.M. Hermens and M.H.S. Kraak, 2004. Baseline toxicity of a chlorobenzene mixture and total body residues measured and estimated with solid-phase microextraction. Environ. Toxicol. Chem. 23(8): 2017-2021.
• Leslie, H.A., M.H.S. Kraak and J.L.M. Hermens, 2004. Chronic toxicity and body residues of the nonpolar narcotic 1,2,3,4-tetrachlorobenzene in Chironomus riparius. Environ. Toxicol. Chem. 23(8): 2022-2028.
• Vos. J.H., E.T.H.M. Peeters, R. Gylstra, M.H.S. Kraak and W. Admiraal, 2004. Nutritional value of sediments for macroinvertebrate communities in shallow eutrophic waters. Arch. Hydrobiol. 161(4): 469-487.
• Heugens, E.H.W., T. Jager, R. Creyghton, M.H.S. Kraak, A.J. Hendriks, N.M. van Straalen and W. Admiraal, 2003. Temperature dependent effects of cadmium on Daphnia magna: accumulation versus sensitivity. Environ. Sci. Technol. 37: 2145-2151.
• Wiegman, S., C. Barranguet, E. Spijkerman, M.H.S. Kraak and W. Admiraal, 2003. The role of ultraviolet-adaptation of a marine diatom in photoenhanced toxicity of acridine. Environ. Toxicol. Chem. 22(3): 591-598.
• Bleeker, E.A.J., S. Wiegman, P. de Voogt, M.H.S. Kraak, H.A. Leslie, E.M. de Haas, W. Admiraal, 2002. Toxicity of azaarenes - A review. Rev. Environ. Contam. Toxicol. 173: 39-84.
• Bleeker, E.A.J., B.J. Pieters, S. Wiegman and M.H.S. Kraak, 2002. Comparative (photo-enhanced) toxicity of homocyclic and heterocyclic PACs. Polycyclic Aromatic Compounds 22(3/4): 601-610.
• De Haas, E.M., B. Reuvers, C.T.A. Moermond, A.A. Koelmans and M.H.S. Kraak, 2002. Responses of benthic invertebrates to combined toxicant and food input in floodplain lake sediments. Environ.Toxicol. Chem. 21(10): 2165-2171.
• Groenendijk, D., S.M.G. Lücker, M. Plans, M.H.S. Kraak and W. Admiraal, 2002. Dynamics of metal adaptation in riverine chironomids. Environ. Pollut. 117(1): 101-109.
• Ivorra, N., C. Barranguet, M. Jonker, M.H.S. Kraak and W. Admiraal, 2002. Metal-induced tolerance in the freshwater microbenthic diatom Gomphonema parvulum. Environ. Pollut. 116(1): 147-157.
• Ivorra, N., J. Hettelaar, M.H.S. Kraak, S. Sabater and W. Admiraal, 2002. Responses of biofilms to combined nutrient and metal exposure. Environ. Toxicol. Chem. 21(3): 626-632.
• Leslie. H.A., A.J.P. Oosthoek, F.J.M. Busser, M.H.S. Kraak and J.L.M. Hermens, 2002. Biomimetic solid-phase microextraction to predict body residues and toxicity of chemicals that act by narcosis. Environ. Toxicol. Chem. 21(2): 229-234.
• Leslie, H., T.L. ter Laak, F.J.M. Busser, M.H.S. Kraak and J.L.M. Hermens, 2002. Bioconcentration of organic chemicals: is a solid-phase microextraction fiber a good surrogate for biota? Environ. Sci. Technol. 36: 5399-5404.
• Osano, O., A.A. Oladimeji, M.H.S. Kraak and W. Admiraal, 2002. Teratogenic effects of Amitraz, 2,4-dimethylaniline, and Paraquat on developing frog ( Xenopus) embryos. Arch. Environ. Contam. Toxicol. 43: 42-49.
• Van der Geest, H.G., W.J. Soppe, G.D. Greve, A. Kroon and M.H.S. Kraak, 2002. Combined effects of lowered oxygen and toxicants (copper and diazinon) on the mayfly Ephoron virgo. Environ. Toxicol. Chem. 21(2): 431-436.
• Van der Geest, H.G., M.H.S. Kraak and G.D. Greve, 2002. Insects in polluted rivers: an experimental analysis. Proc. Exp. Appl. Entomol. 13: 9-19.
• Wiegman , S., J.A.G. Termeer, T. Verheul, M.H.S. Kraak, P. de Voogt, R.W.P.M. Laane and W. Admiraal, 2002. UV Absorbance dependent toxicity of acridine to the marine diatom Phaeodactylum tricornutum. Environ. Sci. Technol. 36: 908-913.
• Bleeker, E.A.J., L. Noor, M.H.S. Kraak and W. Admiraal, 2001. Comparative metabolism of phenanthridine by carp ( Cyprinus carpio) and midge larvae ( Chironomus riparius). Environ. Pollut. 112: 11-17.
• Wiegman, S., P.L.A. van Vlaardingen, E.A.J. Bleeker, P. de Voogt and M.H.S. Kraak, 2001. Phototoxicity of azaarene isomers to the marine flagellate Dunaliella tertiolecta. Environ. Toxicol. Chem. 20(7): 1544-1550.
• Admiraal, W., C. Barranguet, S.A.M. van Beusekom, E.A.J. Bleeker, F.P. van den Ende, H.G. van der Geest, D. Groenendijk, N. Ivorra, M.H.S. Kraak and S.C. Stuijfzand, 2000. Linking ecological and ecotoxicological techniques to support river rehabilitation. Chemosphere 41: 289-295.
• Groenendijk, D., S.M.G. Lücker, M.H.S. Kraak and W. Admiraal, 2000. Seasonal variation in metal-adaptation in the midge Chironomus riparius originating from a metal-contaminated river. In: Hoffrichter, O. (ed.). Late 20 ^th Century Research on Chironomidae, pp. 491-495.
• Ivorra, N., S. Bremer, H. Guasch, M.H.S. Kraak and W. Admiraal, 2000. Differences in the sensitivity of benthic microalgae to Zn and Cd regarding biofilm development and exposure history. Environ. Toxicol. Chem. 19(5): 1332-1339.
• Kraak, M.H.S., S.C. Stuijfzand and W. Admiraal, 2000. Interaction between organic matter and toxicants in polluted river water: beneficial and inhibiting effects on the midge Chironomus riparius. In: Hoffrichter, O. (ed.). Late 20 ^th Century Research on Chironomidae, pp. 507-511.
• Stuijfzand, S.C., L. Poort, G.D. Greve, H.G. van der Geest and M.H.S. Kraak, 2000. Variables determining the impact of diazinon on aquatic insects: Taxon, developmental stage, and exposure time. Environ. Toxicol. Chem. 19(3): 582-587.
• Stuijfzand, S.C., M. Helms, M.H.S. Kraak and W. Admiraal, 2000. Interacting effects of toxicants and organic matter on the midge Chironomus riparius in polluted river water. Ecotoxicol. Environ. Saf. 46(3): 351-356.
• Van der Geest, H.G., G.D. Greve, A. Kroon, S. Kuijl, M.H.S. Kraak and W. Admiraal, 2000. Sensitivity of characteristic riverine insects, the caddisfly Cyrnus trimaculatus and the mayfly Ephoron virgo, to copper and diazinon. Environ. Pollut. 109(2): 177-182.
• Van der Geest, H.G., G.D. Greve, M.E. Boivin M.H.S. Kraak and C.A.M. van Gestel, 2000. Mixture toxicity of copper and diazinon to larvae of the mayfly Ephoron virgo, judging additivity at different effect levels. Environ. Toxicol. Chem. 19(12): 2900-2905.
• Bleeker, E.A.J., H.G. van der Geest, H.J.C. Klamer, P. de Voogt, E. Wind and M.H.S. Kraak, 1999. Toxic and genotoxic effects of azaarenes: isomers and metabolites. Polycyclic Aromatic Compounds 13: 191-203.
• De Voogt, P., E.A.J. Bleeker, P.L.A. van Vlaardingen, A. Fernandez, J. Slobodnik, H. Wever and M.H.S. Kraak, 1999. Formation and identification of azaarene transformation products from aquatic invertebrate and algal metabolism. J. Chrom. B. 724: 265-274.
• Greve, G.D., H.G. van der Geest, S.C. Stuijfzand, A. Kureck and M.H.S. Kraak, 1999. Development and validation of an ecotoxicity test using field collected eggs of the riverine mayfly Ephoron virgo. Proc. Exp. Appl. Entomol. 10: 105-110.
• Groenendijk, M.H.S. Kraak and W. Admiraal, 1999. Efficient shedding of accumulated metals during metamorphosis in metal-adapted populations of the midge Chironomus riparius. Environ. Toxicol. Chem. 18 (6): 1225-1231.
• Ivorra, N., J. Hettelaar, G.M.J. Tubbing, M.H.S. Kraak, S. Sabater and W. Admiraal, 1999. Translocation of microbenthic algal assemblages used for in situ analysis of metal pollution in rivers. Arch. Environ. Contam. Toxicol. 37(1): 19-28.
• Kraak, M.H.S., S.C. Stuijfzand and W. Admiraal, 1999. Short-term ecotoxicity of a mixture of five metals to the zebra mussel Dreissena polymorpha. Bull. Environ. Contam. Toxicol. 63(6): 805-812.
• Leslie, H.A., T.I. Pavluk, A. bij de Vaate and M.H.S. Kraak, 1999. Caddisflies, chromium contamination and the triad assessment approach in a Russian river. Proc. Exp. Appl. Entomol. 10: 111-116.
• Leslie, H.A., T.I. Pavluk, A. Bij de Vaate and M.H.S. Kraak, 1999. Triad assessment of the impact of chromium contamination on benthic macroinvertebrates in the Chusovaya River (Urals, Russia). Arch Environ. Contam. Toxicol. 37(2): 182-189.
• Van der Geest, H.G., G.D. Greve, E.M. de Haas, B.B. Scheper, M.H.S. Kraak, S.C. Stuijfzand, C.H. Augustijn and W. Admiraal, 1999. Survival and behavioural responses of larvae of the caddisfly Hydropsyche angustipennis to copper and diazinon. Environ. Toxicol. Chem. 18(9): 1965-1971.
• Van der Geest, H.G., G.D. Greve, B.B. Scheper, E.M. de Haas, S.C. Stuijfzand and M.H.S. Kraak, 1999. Key factors limiting the distribution of sensitive aquatic insect species: effects of copper and diazinon on larvae of the caddisfly Hydropsyche angustipennis (Trichoptera). Proc. 9th Int. Symp. Trichoptera, pp. 117-122.
• Wiegman, S., P.L.A. van Vlaardingen, W.J.G.M. Peijnenburg, S.A.M. van Beusekom, M.H.S. Kraak and W. Admiraal, 1999. Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom Phaeodactylum tricornutum. Environ. Sci. Technol. 33(23): 4256-4262.
• Bleeker, E.A.J., H.G. van der Geest, M.H.S. Kraak, P. de Voogt and W. Admiraal, 1998. Comparative ecotoxicity of NPAHs to larvae of the midge Chironomus riparius. Aquat. Toxicol. 41: 51-62.
• Greve, G.D., H.G. van der Geest, S.C. Stuijfzand, S. Engels and M.H.S. Kraak, 1998. Development of ecotoxicity tests using laboratory reared larvae of the riverine caddisflies Hydropsyche angustipennis and Cyrnus trimaculatus. Proc. Exp. Appl. Entomol. 9: 205-210.
• Groenendijk, D., J.F. Postma, M.H.S. Kraak and W. Admiraal, 1998. Seasonal dynamics and larval drift of Chironomus riparius (Diptera) in a metal contaminated lowland river. Aquat. Ecol. 32: 341-351.
• Stuijfzand, S.C., A. Drenth, M. Helms and M.H.S. Kraak, 1998. Bio-assays using the midge Chironomus riparius and the zebra mussel Dreissena polymorpha for evaluation of river water quality. Arch. Environ. Contam. Toxicol. 34(4): 357-363.
• Kraak, M.H.S., C. Ainscough, A. Fernandez, P.L.A. van Vlaardingen, P. de Voogt and W. Admiraal, 1997. Short-term and chronic exposure of the zebra mussel ( Dreissena polymorpha) to acridine: effects and metabolism. Aquat. Toxicol. 37(1): 9-20.
• Kraak, M.H.S., P. Wijnands, H.A.J. Govers, W. Admiraal and P. de Voogt, 1997. Structural-based differences in ecotoxicity of benzoquinoline isomers to the zebra mussel ( Dreissena polymorpha). Environ. Toxicol. Chem. 16(10): 2158-2163.
• Van der Geest, H.G., S.C. Stuijfzand, M.H.S. Kraak and W. Admiraal, 1997. Impact of a diazinon calamity in 1996 on the aquatic macroinvertebrates in the river Meuse, The Netherlands. Neth. J. Aquat. Ecol. 30(4): 327-330.
• Bleeker, E.A.J., M.C. Buckert-de Jong, H.G. van der Geest and M.H.S. Kraak, 1996. Toxicity of Nitrogen-containing polycyclic aromatic hydrocarbons (NPAH) to the midge Chironomus riparius (Diptera). Proc. Exp. Appl. Entomol. 7: 197-202.
• Stuijfzand, S.C., D. Shen, M. Helms and M.H.S. Kraak, 1996. Effects of pollution in the river Meuse on the midge Chironomus riparius. Proc. Exp. Appl. Entomol. 7: 211-216.
• Ivorra, N., M.H.S. Kraak and W. Admiraal, 1995. Use of lake water in testing copper toxicity to desmid species. Water Res. 29(9): 2113-2117.
• Kraak, M.H.S., 1995. Are zebra mussels restricted by toxicant levels in the river Meuse ? A review. Neth. J. Aquat. Ecol. 29(1): 147-150.
• Kraal, M.H., M.H.S. Kraak, C.J. de Groot and C. Davids, 1995. Uptake and tissue distribution of dietary and aqueous cadmium by carp ( Cyprinus carpio). Ecotox. Environ. Saf. 31: 179-183.
• Langevoord, M., M.H.S. Kraak, M.H. Kraal and C. Davids, 1995. The importance of prey choice for the accumulation of Cd in carp ( Cyprinus carpio). J. N. Am Benthol. Soc. 14(3): 423-429.
• Stuijfzand, S.C., M.H.S. Kraak, Y.A. Wink and C. Davids, 1995. Short-term effects of nickel on the filtration rate of the zebra mussel Dreissena polymorpha. Bull. Environ. Contam. Toxicol. 54: 376-381.
• Kraak, M.H.S., D. Lavy, H. Schoon, M. Toussaint, W.H.M. Peeters and N.M. van Straalen, 1994. Ecotoxicity of mixtures of metals to the zebra mussel Dreissena polymorpha. Environ. Toxicol. Chem. 13(1): 109-114.
• Kraak, M.H.S., Y.A. Wink, S.C. Stuijfzand, M.C. Buckert-de Jong, C.J. de Groot and W. Admiraal, 1994. Chronic ecotoxicity of Zn and Pb to the zebra mussel Dreissena polymorpha. Aquat. Toxicol. 30: 77-89.
• Kraak, M.H.S., M. Toussaint, D. Lavy and C. Davids, 1994. Short-term effects of metals on the filtration rate of the zebra mussel Dreissena polymorpha. Environ. Pollut. 84: 139-143.
• Kraak, M.H.S., F. Kuipers, H. Schoon, C.J. de Groot and W. Admiraal, 1994. The filtration rate of the zebra mussel Dreissena polymorpha used for water quality assessment in Dutch rivers. Hydrobiologia 294: 13-16.
• Davids, C. and M.H.S. Kraak, 1993. Trematode parasites of the zebra mussel ( Dreissena polymorpha). In: Zebra Mussels: Biology, Impacts, and Control. T.F. Nalepa and D.W. Schloesser, eds. Lewis Publishers. Boca Raton, U.S.A. pp. 749-759.
• Dorgelo, J. and M.H.S. Kraak, 1993. Seasonal variation in tissue dry biomass and its relative ash and organic carbon and nitrogen content in the freshwater mussel Dreissena polymorpha. Arch. Hydrobiol. 127(4): 409-421.
• Kraak, M.H.S., D. Lavy, M. Toussaint, H. Schoon, W.H.M. Peeters and C. Davids, 1993. Toxicity of heavy metals to the zebra mussel ( Dreissena polymorpha). In: Zebra Mussels: Biology, Impacts, and Control. T.F. Nalepa and D.W. Schloesser, eds. Lewis Publishers. Boca Raton, U.S.A. pp. 491-502.
• Kraak, M.H.S., M. Toussaint, E.A.J. Bleeker and D. Lavy, 1993. Metal regulation in two species of freshwater bivalves. In: Ecotoxicology of Metals in Invertebrates. R. Dallinger and P.S. Rainbow, eds. Lewis Publishers. Boca Raton, U.S.A. pp. 175-186.
• Kraak, M.H.S., H. Schoon, W.H.M. Peeters and N.M. van Straalen, 1993. Chronic ecotoxicity of mixtures of Cu, Zn and Cd to the zebra mussel Dreissena polymorpha. Ecotox. Environ. Saf. 25: 315-327.
• Bleeker, E.A.J, M.H.S. Kraak and C. Davids, 1992. Ecotoxicity of lead to the zebra mussel Dreissena polymorpha. Hydrobiological Bulletin 25(3): 233-236.
• Kraak, M.H.S., 1992. Ecotoxicity of metals to the freshwater mussel Dreissena polymorpha. PhD thesis, University of Amsterdam.
• Kraak, M.H.S., D. Lavy, W.H.M. Peeters and C. Davids, 1992. Chronic ecotoxicity of copper and cadmium to the zebra mussel Dreissena polymorpha. Arch. Environ. Contam. Toxicol. 23(3): 363-369.
• Kraak, M.H.S., M.C.T. Scholten, W.H.M. Peeters and W.C. de Kock, 1991. Biomonitoring of heavy metals in the Western European rivers Rhine and Meuse using the freshwater mussel Dreissena polymorpha. Environ. Pollut. 74: 101-114.
• Kraak, M.H.S. and C. Davids, 1991. The effect of the parasite Phyllodistomum macrocotyle (Trematoda) on heavy metal concentrations in the freshwater mussel Dreissena polymorpha. Neth. J. Zool. 41(4): 269-276.
• Timmermans, K.R., B. van Hattum, M.H.S. Kraak and C. Davids, 1989. Trace metals in a littoral foodweb: concentrations in organisms, sediment and water. Sci. Total Environ. 87/88: 477-494.
• Wagner, A.M., M.H.S. Kraak, W.A.M. van Emmerik and L.H.W. van der Plas, 1989. Respiration of plant mitochondria with various substrates: Alternative pathway with NADH and TCA cycle derived substrates. Plant Physiol. Biochem. 27(6): 837-845.
• Denneman, C.A.J., M.H.S. Kraak, R.F. Hogervorst and N.M. van Straalen, 1988. Soil microarthropod abundance in relation to soil acidification and forest decline. Proceedings First European Conference on Ecotoxicology, Copenhagen. pp. 242-246.
• Straalen, N.M. van, M.H.S. Kraak and C.A.J. Denneman, 1988. Soil microarthropods as indicators of soil acidification and forest decline in the Veluwe area, the Netherlands. Pedobiol. 32: 47-55.
• Ernst, W.H.O., M.H.S. Kraak and L. Stoots, 1987. Growth and mineral nutrition of Scrophularia nodosa with various combinations of fulvic and humic acids. J. Plant Physiol. 127: 171-175.
• Denneman, C.A.J., M.H.S. Kraak en N.M. van Straalen, 1986. Bodemdieren als indicatoren van de vitaliteit van dennenbossen op de Veluwe. Nederlands Bosbouwtijdschrift 58(7/8): 204-208.

Presentations

• Weenink, E.F.J., M.H.S. Kraak, C. van Teulingen, S. Kuijt, M.J. van Herk, C.A.M. Sigon, T. Piel, G. Sandrini, M. Leon-Grooters, M.L. de Baat, J. Huisman and P.M. Visser, 2023. Gevoeligheid van fytoplankton, zooplankton en macro-evertebraten voor waterstofperoxide behandelingen tegen blauwalgenbloei. STOWA Symposium Platform Blauwalgen 'Blauwalgen in Nederland: onderzoek en beheer’. Wageningen, The Netherlands, February 2023.
• Gkika, I.S., G. Xie, C.A.M. van Gestel, T.L. ter Laak, J.A. Vonk, A.P. van Wezel and M.H.S. Kraak, 2023. Per-and polyfluoroalkyl substances research priorities for environmental risk assessment. SETAC Europe 33rd Annual Meeting. Dublin, Ireland. May 2023.
• Gkika, I.S., M.H.S. Kraak, C.A.M. van Gestel, T.L. ter Laak, A.P. van Wezel, R. Hardy and J.A. Vonk, 2023. Distribution and bioaccumulation of per-and polyfluoroalkyl substances in the aquatic environment: A mesocosm study on PFAS uptake from sediment by an aquatic plant. SETAC Europe 33rd Annual Meeting. Dublin, Ireland. May 2023.
• Xie, G., M.H.S. Kraak, J.A. Vonk, T.L. ter Laak, A.P. van Wezel and C.A.M. van Gestel, 2023. Multigenerational toxicity of per- and polyfluoroalkyl substances (PFAS) to Daphnia magna and Folsomia candida. SETAC Europe 33rd Annual Meeting. Dublin, Ireland. May 2023.
• Flerlage, H., B. Stadelmann, M.H.S. Kraak, A. Praetorius and J.C. Slootweg, 2023. Safe, sustainable and circular by design organophosphate flame retardants. SETAC Europe 33rd Annual Meeting. Dublin, Ireland. May 2023.
• Stadelmann, B., H. Flerlage, J.C. Slootweg, and M.H.S. Kraak, 2023. Aquatic ecotoxicity of safe and sustainable by design organophosphate flame retardants. SETAC Europe 33rd Annual Meeting. Dublin, Ireland. May 2023.
• De Baat, M.L., D.M. Narain-Ford, J. de Weert, D. Giesen, H. Beeltje, T. Hamers, R. Helmus, P. de Voogt and M.H.S. Kraak, 2023. Passive sampler design determines polar micropollutant adsorption and subsequent bioassay responses. SETAC Europe 33^rd Annual Meeting. Dublin, Ireland. May 2023.
• Bakker, A.M., T.V. van der Meer, M.H.S. Kraak and P.F.M. Verdoschot, 2023. Nutrient removal by buffer zones; knowns and unknowns. 13th Symposium for European Freshwater Sciences. Newcastle, UK. June 2023.
• Van der Meer, T.V., L. Hendriks, M.H.S. Kraak, P.F.M. Verdonschot, A.J.P. Smolders, L.P.M. Lamers and A.J. Veraart, 2023. Sludge degradation, nutrient removal and reduction of greenhouse gas emission by a Chironomus-Azolla wastewater treatment cascade. 13th Symposium for European Freshwater Sciences. Newcastle, UK. June 2023.
• Hesselink, L., K. Villari, E. de Jonghe, C. Heemsbergen, E. Becker and M.H.S. Kraak, 2023. The combined effects of temperature and pre-exposure on the toxicity of thiacloprid to aquatic insects. 13th Symposium for European Freshwater Sciences. Newcastle, UK. June 2023.
• Becker, E., R.C.M. Verdonschot, J.A. Vonk A, M.H.S. Kraak and P.F.M. Verdonschot, 2023. Stream insect responses to aquatic-terrestrial ecotone degradation. 13th Symposium for European Freshwater Sciences. Newcastle. UK, June 2023.
• Tack, L.F.J., H.G. van der Geest, J.A. Vonk, M.H.S. Kraak and J. Huisman, 2023. The food web structure of a heavily modified reservoir lake reflects habitat deterioration. 13th Symposium for European Freshwater Sciences. Newcastle, UK. June 2023.
• Van der Meer, T.V., L. Hendriks, F. van Schie, P.F.M. Verdonschot, M.H.S. Kraak, A.J.P. Smolders, L.P.M. Lamers and A.J. Veraart, 2023. AQUAFARM: Organism interactions can improve WWTP efficiency. 6^th IWA International Conference on Eco-Technologies for Wastewater Treatment. Girona, Spain. June 2023.
• Stadelmann, B., H. Flerlage, J.C. Slootweg, and M.H.S. Kraak, 2023. Aquatic ecotoxicity of safe and sustainable by design organophosphate flame retardants. SETAC 12th SETAC Young Environmental Scientists Meeting. Landau, Germany. August 2023.
• Gkika, I.S., M.H.S. Kraak, C.A.M. van Gestel, T.L. ter Laak, A.P. van Wezel, R. Hardy and J.A. Vonk, 2023. Bioturbation affects bioaccumulation of PFAS: uptake from sediments by a rooting macrophyte and a benthic invertebrate. EnvironChemTox Symposium Environmental occurrence, hazard and risk of PFAS. Amsterdam, The Netherlands. October 2023.
• Xie, G., M.H.S. Kraak, J.A. Vonk, T.L. ter Laak, A.P. van Wezel, T. Groffen, L. Bervoets and C.A.M. van Gestel, 2023. Multigeneration toxicity of per- and polyfluoroalkyl substances (PFAS) to Daphnia magna and Folsomia candida. EnvironChemTox Symposium Environmental occurrence, hazard and risk of PFAS. Amsterdam, The Netherlands. October 2023.
• Gkika, I.S., G. Xie, C.A.M. van Gestel, T.L. ter Laak, J.A. Vonk, A.P. van Wezel and M.H.S. Kraak, 2023. PFAS research priorities for environmental risk assessment. EnvironChemTox Symposium Environmental occurrence, hazard and risk of PFAS. Amsterdam, The Netherlands. October 2023.
• Xie, G., W. Puijk, D. Veltman, C.A.M. van Gestel, J.A. Vonk, T.L. ter Laak, A.P. van Wezel and M.H.S. Kraak, 2023. Effects of fluorocarbon chain length and polar head groups on the toxicity of per- and polyfluorinated substances (PFAS). EnvironChemTox Symposium Environmental occurrence, hazard and risk of PFAS. Amsterdam, The Netherlands. October 2023.
• Vonk, J.A. and M.H.S. Kraak, 2023. Herbicide exposure and toxicity to aquatic primary producers. 16th International Symposium on Aquatic Plants. Antwerp, Belgium. November 2023.

   

• Boonstra, H., M.L. de Baat, F. van der Meer, I. Roessink and M.H.S. Kraak, 2022. Temporal variation of ecotoxicological risks in agricultural ditches. SETAC Europe 32^nd  Annual Meeting. Copenhagen. May 2022.
• Van der Meer, T.V., P.F.M. Verdonschot, L. van Eck, D. Narain-Ford and M.H.S. Kraak, 2022. Wastewater treatment plant contaminant profiles affect macroinvertebrate sludge degradation. SETAC Europe 32^nd  Annual Meeting. Copenhagen. May 2022.
• Van der Meer, T.V., C.J.E. Davey, M.H.S. Kraak and P.F.M. Verdonschot, 2022. Using phytoplankton and invasive mollusks to remove nutrients from WWTP effluents. Joint Aquatic Sciences Meeting, Grand Rapids, Michigan, May 2022.
• Davey, C.J.E., T.V. van der Meer, G.L. Dado, J.C. Haring, M. Lenstra, J. Volkers, O. Zemouri and M.H.S. Kraak, 2022. Immobile and defenseless: behavioural effects of an anticonvulsant on Lymnea stagnalis. SETAC Europe 32^nd  Annual Meeting. Copenhagen. May 2022.
• Davey, C.J.E., M.H.S. Kraak, A. Praetorius, T.L. ter Laak and A.P. van Wezel, 2022. Occurrence, Hazard, and Risk of Psychopharmaceuticals in the European Aquatic Environment. SETAC Europe 32^nd  Annual Meeting. Copenhagen. May 2022.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2021. How can we adequately express aquatic species diversity? Netherlands Annual Ecology Meeting, February 2021.
• Boonstra, H., M.L. de Baat, F. van der Meer, I. Roessink and M.H.S. Kraak, 2021. Temporal variation of ecotoxicological risks in agricultural ditches assessed using passive sampling, bioassays, and chemical analysis. SETAC Europe 31st Annual Meeting. May 2021.
• De Baat, M.L. and M.H.S. Kraak, 2021. Do we systematically underestimate the risks of micropollutants? SETAC Europe 31st Annual Meeting. May 2021.
• Van der Meer, T.V., P.F.M. Verdonschot, L. Dokter and M.H.S. Kraak, 2021. Organic Matter Degradation and Redistribution of Sediment Associated Contaminants by Benthic Invertebrate Activities, a Potential for Bioremediation? SETAC Europe 31st Annual Meeting. May 2021.
• Van der Meer, T.V., K.S. Dirks, T.M.S. Meerwijk, T.J. Reijerkerk, A.F. Schokker, R. van Zwieten, J. van Amerongen, S.A.M. van Beusekom and M.H.S. Kraak, 2021. Species Specific Sensitivity of Freshwater Organisms to Copper. SETAC Europe 31st Annual Meeting. May 2021.
• Davey, C.J.E., M.H.S. Kraak, A. Praetorius, T.L. ter Laak and A.P. van Wezel, 2021. Risk Assessment of psychopharmaceuticals in surface waters using species sensitivity distributions. SETAC Europe 31st Annual Meeting. May 2021.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, H.G. van der Geest and P.F.M. Verdonschot, 2021. Why stream restoration should be land-use specific. Society for Freshwater Science Online Annual Meeting, June 2021.
• Van der Lee, G.H., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2021. Persist or perish: studying the appropriate temporal scales of hydrologic disturbances in relation to an organism’s life cycle. Society for Freshwater Science Online Annual Meeting, June 2021.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Species composition drives macroinvertebrate community classification. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2020.
• De Baat, M.L., R. van der Oost, P. de Voogt, P.F.M. Verdonschot and M.H.S. Kraak, 2020. Advancements in effect-based water quality assessment. SETAC SciCon, May 2020.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2020. Species composition drives macroinvertebrate community classification. Society for Freshwater Science Online Annual Meeting, June 2020.
• Van der Lee, G.H., C. Desjonquères, J. Sueur, M.H.S. Kraak and P.F.M. Verdonschot, 2020. Freshwater ecoacoustics: listening to the ecological status of multi-stressed lowland waters. Society for Freshwater Science Online Annual Meeting, June 2020.
• De Baat, M.L. and M.H.S. Kraak, 2020. Effect-based water quality assessment: Unveiling the unseen and unknown. Wetsus Webinar on Bioassays: added value for water quality monitoring, December 2020.
• De Baat, M.L., M.HS. Kraak, R. Van der Oost, P. De Voogt and P.F.M. Verdonschot, 2019. Tipping the iceberg: Improving effect-based water quality assessment. SETAC North America 40th Annual Meeting, Toronto, Canada, November 2019.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, H.G. van der Geest and P.F.M. Verdonschot, 2019. Responsens of macroinvertebrate communities to land use specific sediment food quality in lowland strems. 11th Symposium for European Freshwater Sciences, Zagreb, Croatia, July 2019.
• Van der Lee, G.H., N. Wieringa, M.L. de Baat, R.C.M. Verdonschot, M.H.S. Kraak, P.F.M. Verdonschot. Multiple stressors interacting on ecological processes in Dutch drainage ditches. 11th Symposium for European Freshwater Sciences, Zagreb, Croatia, July 2019.
• Wieringa, N., B. Prast, A. Bakker, R.A. Melkert, S.T.J. Droge, P.F.M. Verdonschot and M.H.S. Kraak, 2019. The role of bioturbation activity in species specific sensitivity of benthic invertebrates to contaminated sediments. SETAC Europe 29th Annual Meeting, Helsinki, Finland, May 2019.
• De Baat, M.L., G.H. van der Lee, N. Wieringa, P.F.M. Verdonschot and M.H.S. Kraak, 2019. Linking ecotoxicological risks and ecosystem functioning. SETAC Europe 29th Annual Meeting, Helsinki, Finland, May 2019.
• Van Gestel, C.A.M., N.M. van Straalen, T.H.M. Hamers, S. Moes, M.H.S. Kraak, J.R. Parsons, S.T.J. Droge, J.L.M. Hermens, M.G. Vijver, N.W. van den Brink, D. van de Meent, A.M.J. Ragas, A.J. Löhr and F.G.A.J. van Belleghem, 2019. Improving transparency, consistency and efficiency of ecotoxicological teaching: launching the newly developed Open Online Textbook Environmental Toxicology. SETAC Europe 29th Annual Meeting, Helsinki, Finland, May 2019.
• Wagner, T.V., M.L Dullaart, T. de Groot, D.S. Kuiper, T.G. Verouden, I.K. de Wolf, M.H.S. Kraak and M.L. de Baat, 2019. Mixture toxicity of copper and its corrosion inhibitor benzotriazole to Daphnia magna. SETAC Europe 29th Annual Meeting, Helsinki, Finland, May 2019.
• Dos Reis Oliveira, P.C., M.H.S. Kraak, H.G. van der Geest and P.F.M. Verdonschot, 2019. Food quality drives macroinvertebrate community composition in lowland streams differing in catchment land-use. Society for Freshwater Science Annual Meeting, Salt Lake City, Utah, USA, May 2019.
• Van der Lee, G.H., N. Wieringa, M.L. de Baat, R.C.M. Verdonschot, M.H.S Kraak and P.F.M Verdonschot, 2019. Multiple stressors interacting on ecological processes in Dutch drainage ditches. Society for Freshwater Science Annual Meeting, Salt Lake City, Utah, USA, May 2019.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2019. Quantifying cumulative stress experienced by macroinvertebrate assemblages in lowland streams. Society for Freshwater Science Annual Meeting, Salt Lake City, Utah, USA, May 2019.
• De Vries, J., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2019. Quantifying multiple stress experienced by macroinvertebrate communities in lowland streams. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2019.
• Kraak, M.H.S., 2019. Behavioral Ecotoxicology. Invited speaker. University of Antwerp. March 2019.
• Weenink, E., M. Van Herk, M. Leon-Grooters, S. Kuijt, C. van Teulingen, M.H.S. Kraak, J. Huisman and P. Visser, 2018. Toxicity of the cyanocide hydrogen peroxide to zooplankton and macrofauna. ICHA 2018, Nantes, France, October 2018.
• Brock, T.C.M., J.D.M. Belgers, M-C. Boerwinkel, M.H.S. Kraak, J.A. Vonk, I. Roessink, 2018. Toxicity of sediment-bound lufenuron to aquatic arthropods in laboratory bioassays. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• Wieringa, N., M.L. de Baat, B. van Hall, F. Selhorst, S.T.J. Droge, M.H.S. Kraak and P.F.M. Verdonschot, 2018. Effect-based sediment quality assessment incorporating chemical fingerprinting. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• Walker, K-J., N. Wieringa, M.L. de Baat, M.H.S. Kraak, J.R. Parsons and S.T.J. Droge, 2018. Sediment toxicity of chlorpyrifos: whole sediment bioassay vs. silicon disc passive dosing. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• De Baat, M.L., M.T. Nguyen, R. van der Oost, W. van den Berg, W.P. de Voogt and M.H.S. Kraak, 2018. Bioassay battery responses to POCIS and Speedisk passive sample extracts. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• De Baat, M.L., Y. Coolen, D. Van der Pouw Kraan, R. Rood and M.H.S. Kraak, 2018. Innovative design of nationwide Dutch water quality monitoring. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• De Baat, M.L., M.H.S. Kraak, R. van der Oost, W.P. de Voogt and P.F.M. Verdonschot, 2018. Smart Monitoring: Application of innovative tools in nation wide water quality assessment. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• De Baat, M.L., T.V. van der Meer, P.F.M. Verdonschot and M.H.S. Kraak, 2018. Benthic invertebrate bioturbation activity determines species specific sensitivity to sediment contamination. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• C.A.M. van Gestel, N.M van Straalen, T. Hamers, S. Moes, M.H.S. Kraak, J.R. Parsons, S.T.J. Droge, J.L.M. Hermens, M.G. Vijver, N.W. van den Brink, A.M. Ragas, D. van de Meent, A.J. Löhr and F. van Belleghem, 2018. Improving transparency, consistency and efficiency of teaching ecotoxicology: development of an open online textbook Environmental Toxicology. SETAC Europe 28^th Annual Meeting, Rome, Italy, May 2018.
• De Baat, M.L., S.T.J. Droge, K-J. Walker, N. Wieringa, M.H.S. Kraak and W.P. de Voogt, 2018. Equilibrium silicon passive sampling/dosing to assess sediment toxicity of bioavailable pesticides. International Passive Sampling Workshop 2018, Dublin, Ireland, May 2018.
• De Baat, M.L., N. Wieringa, S.T.J. Droge, M.H.S. Kraak, P.F.M. Verdonschot and W.P. de Voogt, 2018. Incorporating SPME based chemical fingerprinting in sediment quality assessment. International Passive Sampling Workshop 2018, Dublin, Ireland, May 2018.
• De Vries, J., P.F.M. Verdonschot and M.H.S. Kraak, 2018. Predicting ecological water quality: opportunities and limitations of multi-scale aquatic ecological prediction models to support ecological water quality improvement. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2018.
• Van der Lee, G.H., M.H.S. Kraak, R.C.M. Verdonschot and P.F.M. Verdonschot, 2018. Persist or parish. Vulnerability of invertebrates to disturbance is determined by critical life stages. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2018.
• Kraak, M.H.S., 2017. Ecotoxicology from different points of view. Invited speaker. Farewell symposium Nico van Straalen, Amsterdam, The Netherlands, November 2017.
• Van der Lee, G., M.H.S. Kraak, R.C.M. Verdonschot, J.A. Vonk & P.F.M. Verdonschot, 2017. Oxygen drives benthic and pelagic decomposition pathways in shallow wetlands. Society for Freshwater Science Annual Meeting, Raleigh, North Carolina, USA, June 2017.
• Dos Reis Oliveira, P.C., P.F.M. Verdonschot, M.H.S. Kraak and H.G. van der Geest, 2017. Land-use effects on lowland stream ecosystems. Society for Freshwater Science Annual Meeting, Raleigh, North Carolina, USA, June 2017.
• De Baat, M.L., M.H.S. Kraak, R. Van der Oost, W.P. de Voogt and P.F.M. Verdonschot, 2017. Smart Monitoring: Application of innovative tools in nationwide water quality assessment. SETAC Europe 27^th Annual Meeting, Brussels, Belgium, May 2017.
• De Baat, M.L., F.B. de Deugd, D.P. Mangé, C. van Teulingen, A. Twaalfhoven, D.N. Vink and M.H.S. Kraak, 2017. Screening of Dutch surface water quality using Daphnia magna bioassays. SETAC Europe 27^th Annual Meeting, Brussels, Belgium, May 2017.
• Bas, D.A., M.L. de Baat, S.A.M. van Beusekom, F. van der Meer, M. de Vries, R. van der Oost, P.F.M. Verdonschot and M.H.S. Kraak, 2017. Nationwide screening of herbicide risk to algae. SETAC Europe 27^th Annual Meeting, Brussels, Belgium, May 2017.
• Jollie, L., M.H.S. Kraak, J.A. Vonk, I. Roessink and T.C.M. Brock, 2017. Comparing the chemical and ecotoxicological persistence of sediment associated lufenuron. SETAC Europe 27^th Annual Meeting, Brussels, Belgium, May 2017.
• Roessink, I., L. Jollie, M.J. Papo, J. Touwen, M.H.S. Kraak, J.A. Vonk and T.C.M. Brock, 2017. The use of 10 d sediment-spiked toxicity tests with benthic macro-invertebrates and the insecticide lufenuron as a Tier 2 effect assessment approach. SETAC Europe 27^th Annual Meeting, Brussels, Belgium, May 2017.
• De Baat, M.L., D.A. Bas, S.A.M. van Beusekom, F. van der Meer, M. de Vries, R. van der Oost, P.F.M. Verdonschot and M.H.S. Kraak, 2017. Nationwide screening of herbicide risks to algae. NORMAN workshop: Integrated Exposure and Effects Assessment. Amsterdam, The Netherlands, April 2017.
• Dos Reis Oliveira, P.C.; P.F.M. Verdonschot, M.H.S. Kraak, R.C.M. Verdonschot and H.G. van der Geest, 2017. Sand addition as a restoration technique in lowland streams. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2017.
• Bas, D.A., M.L. de Baat, S.A.M. van Beusekom, F. van der Meer, M. de Vries, R. van der Oost, P.F.M. Verdonschot and M.H.S. Kraak, 2016. Nationwide screening of herbicide risk to algae. MilieuChemTox Symposium 2016, Wageningen, The Netherlands, November 2016.
• Kraak, M.H.S., M.L. de Baat, D.A. Bas, R. van der Oost and P.F.M. Verdonschot, 2016. Getting to know the effects of the unknowns: bioassay responses & suspected villains. Invited speaker. MilieuChemTox Symposium 2016, Wageningen, The Netherlands, November 2016.
• Brock, T.C.M., D.A. Bas, L. Bibbe, D. Belgers, M.C. Boerwinkel, S. Crum, N. Diepens, M.H.S. Kraak, M. Schoorl, J.A. Vonk, and I. Roessink, 2016. Effects of sediment-spiked lufenuron on benthic macroinvertebrates in single-species tests and outdoor microcosms. SETAC Europe 26^th Annual Meeting, Nantes, France, May, 2016.
• Hunting, E.R., J.A. Vonk, C.J.M. Musters, M.H.S. Kraak and M.G. Vijver, 2016. Effects of agricultural practices on organic matter degradation in ditches. SETAC Europe 26^th Annual Meeting, Nantes, France, May, 2016.
• Bakx, T.R.M., E.T.M. Halbesma, F.J. Maidman, R.E. Zwaan, M. Schoorl and M.H.S. Kraak, 2016. Toxicity of equitoxic and non-equitoxic zinc and cadmium mixtures to Daphnia magna. SETAC Europe 26^th Annual Meeting, Nantes, France, May, 2016.
• Bas, D.A., L. Bibbe, I. Roessink, M. Schoorl, J.A.  Vonk and M.H.S. Kraak, 2015. Sediment ecotoxicity of the insecticide lufenuron to benthic macroinvertebrates. 27^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2015.
• Kraak, M.H.S., 2015. Ecotoxicologische  water- en sedimentkwaliteitsbepaling m.b.v. bioassays. Invited speaker. AWS Symposium, Amsterdam, November 2015.
• Verweij, W., B. Blonk and M.H.S. Kraak, 2015. Groundwater organisms: sensitive to toxic substances? EU Working Group Groundwater, Luxembourg, October 2015.
• Hammer, J., Bartstra, W.J., Dalmijn. J.A., van der Does, N.H.C., van Kuijk, B.F., te Wierik, S.A. and M.H.S. Kraak. Concentration addition in mixtures with increasing number of metals. SETAC Europe 25 ^th Annual Meeting, Barcelona, Spain, May 2015.
• Kraak, M.H.S., 2015. Ecological and chemical quality of fresh water bodies: the good, the bad and the muddy. Invited speaker. CWE Symposium Back to the future, the ecological reshaping of Dutch waters. Amsterdam, The Netherlands, February 2015.
• Bonthond, G., A. Spelt, R.A. Loayza-Muro, A.H.M. Voetdijk, P.M. Visser, J.A.J. Breeuwer and M.H.S. Kraak, 2014. Photoprotective compounds in mayflies (Ephemeroptera: Baetidae from extreme altitudes. 26 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2014.
• Verweij, W., B. Blonk and M.H.S. Kraak, 2014. Groundwater organisms: (how) do they fit in a legal framework? MilieuChemTox Symposium 2014, Utrecht, The Netherlands, November 2014.
• Spelt, A., G. Bonthond, R. Loayza-Muro, J.A.J. Breeuwer and M.H.S. Kraak, 2014. Life at the edge: genetic diversity of chironomids in high altitude Andean streams. MilieuChemTox Symposium 2014, Utrecht, The Netherlands, November 2014.
• Tukker, A.M., J. Hammer, M.H.S. Kraak, J.J. Haftka and J.L.M. Hermens, 2014. Bioavailability and aquatic toxicity of alkyl carboxylates under varying medium composition. MilieuChemTox Symposium 2014, Utrecht, The Netherlands, November 2014.
• Barmentlo, S.H., J.M. Stel, M. van Doorn, C. Eschauzier, P. de Voogt and M.H.S. Kraak, 2014. Acute and chronic toxicity of new perfluoroalkyl substances to Daphnia magna. MilieuChemTox Symposium 2014, Utrecht, The Netherlands, November 2014.
• Van Beusekom, M., B. van Kuijk, M.H.S. Kraak and J.A. Vonk, 2014. Invertebrate community composition and food quality mediated decomposition rates in benthic ecosystems. CWE Symposium Constructed wetlands: challenges and opportunities, Ghent, Belgium, July 2014.
• Kraak, M.H.S., S.L. Waaijers, J.R. Parsons, W. Admiraal and P. de Voogt, 2014. Environmental fate and effects of new generation flame retardants. 35 ^th Anniversary Meeting of The Netherlands Society of Toxicology, Veldhoven, The Netherlands, June 2014.
• Barmentlo, S.H., J.M. Stel, M. van Doorn, C. Eschauzier, P. de Voogt and M.H.S. Kraak, 2014. Acute and chronic toxicity of new perfluoroalkyl substances to Daphnia magna. 35 ^th Anniversary Meeting of The Netherlands Society of Toxicology, Veldhoven, The Netherlands, June 2014.
• Kraak, M.H.S., R.A. Korver, R.Vis, J. Schütt, K.C.A. Duinmeijer and S.B. Sjollema, 2014. Contributions of individual metals to equitoxic mixture toxicity. SETAC Europe 24 ^th Annual Meeting, Basel, Switzerland, May 2014.
• Jurgens, S., S.L. Waaijers, R. Helmus, M.H.S. Kraak, W. Admiraal, P. de Voogt and J.R. Parsons, 2014. Mineralisation and biodegradation of aromatic organophosphorus flame retardants. SETAC Europe 24 ^th Annual Meeting, Basel, Switzerland, May 2014.
• Sjollema, S.B., P. Redondo-Hasselerharm, M. van der Meulen, M.H.S. Kraak and A.D. Vethaak, 2014. Combined effects of microplastics and adsorbed contaminants on marine microalgal photosynthesis and growth. SETAC Europe 24 ^th Annual Meeting, Basel, Switzerland, May 2014.
• Sjollema, S.B., R.E. Fernandez, K. Kloet, J. Kreuning, T. Peters, A. Spelt and M.H.S. Kraak, 2014. Field relevance of laboratory metal mixture toxicity tests. SETAC Europe 24 ^th Annual Meeting, Basel, Switzerland, May 2014.
• Waaijers, S.L., M.H.S. Kraak, J.R. Parsons, W. Admiraal and P. de Voogt, 2014. Environmental fate and effects of new generation flame retardants. SETAC Europe 24 ^th Annual Meeting, Basel, Switzerland, May 2014.
• Lavtizar, V., M.H.S. Kraak, S.L. Waaijers, S.A.E. Kools, P. Trebse and D. Dolenc, 2013. Acute and chronic toxicity of chlorantraniliprole to Daphnia magna. International Conference on Environmental Science and Technology, Urgup, Nevsehir, Turkey, June 2013.
• Van Dierendonck, R., J.A.J. Breeuwer, M.H.S. Kraak, R.A. Loayza-Muro and M.L. de Baat, 2013. Allopatric speciation in the Andes? A study of chironomid diversity. 25 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2013.
• De Baat, M. R. Loayza-Muro J.A.J. Breeuwer and M.H.S. Kraak, 2012. Metals and altitude drive genetic structure of chironomid communities in high altitude Andean streams. 24 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2012.
• Waaijers, S.L., A.M. Soeter, J. Hartmann, S.A.E. Kools, M.H.S. Kraak, J.R. Parsons, W. Admiraal and W.P. de Voogt, 2012. How Toxic Are Halogen-Free Flame Retardants? Aquatic toxicity of alternative flame retardants to Daphnia magna. SETAC North America 33 ^rd Annual Meeting, Long Beach, California, USA, November 2012.
• Waaijers, S.L., R. Helmus, C. Blair, J.R. Parsons, M.H.S. Kraak, W. Admiraal and W.P. de Voogt, 2012. Biodegradation of Halogen-Free Flame Retardants. SETAC North America 33 ^rd Annual Meeting, Long Beach, California, USA, November 2012.
• Kraak, M.H.S., 2012. Ecotoxicological water and sediment quality assessment using invertebrate assays. Invited speaker. First Joint German-Dutch Meeting of the Societies of Toxicology, Düsseldorf, Germany, October 2012.
• Kraak, M.H.S., E.R. Hunting, C. Mulder, A.M. Breure and W. Admiraal, 2012. Comparative sensitivity of detritivores and detritus processing to Cu. 6th SETAC World Congress/SETAC Europe 22nd Annual Meeting, Berlin, Germany, May 2012.
• Loayza-Muro, R.A., J. Marticorena-Ruiz, J. Palomino, J.F. Duivenvoorden, M.H.S. Kraak, C. Merritt, M. Asselman, A. Huiberse, M. de Baat, M. van Gemert and W. Admiraal, 2012. Responses of benthic macroinvertebrate communities to multi-stress conditions in high altitude Andean streams. 6th SETAC World Congress/SETAC Europe 22nd Annual Meeting, Berlin, Germany, May 2012.
• Marinkovic, M., W.C. de Leeuw, M. de Jong, W. Admiraal, T.M. Breit, M.H.S. Kraak and M.J. Jonker, 2012. Sequencing the Chironomus riparius transcriptome to compare the sensitivity of gene expression and life-cycle endpoints to toxicant exposure. 6th SETAC World Congress/SETAC Europe 22nd Annual Meeting, Berlin, Germany, May 2012.
• Sjollema, S.B., B. Dekker, M.J. van der Meulen, M. Snelling Berg, N. Thijs, N. van der Zwaag, S.L. Waaijers and M.H.S. Kraak, 2012. The effect of a Copper & Zinc mixture on Dunaliella tertiolecta. 6th SETAC World Congress/SETAC Europe 22nd Annual Meeting, Berlin, Germany, May 2012.
• Waaijers, S.L., A.M. Soeter, J. Harttmann, S.A.E. Kools, D. Kong, H.S. Hendriks, C.A. de Wit, I.T. Cousins, R.H.S. Westerink, P. Leonards, M.H.S. Kraak, J.R. Parsons, W. Admiraal, W.P. de Voogt, 2012. Aquatic toxicity of halogen-free flame retardants. 6th SETAC World Congress/SETAC Europe 22nd Annual Meeting, Berlin, Germany, May 2012.
• Van Gemert, M., M. De Baat, R.A. Verweij,  R. Loayza-Muro and M.H.S. Kraak, 2011. Combined effects of Cu and UVR on survival and melanin synthesis in Chironomus riparius larvae. 23 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2011.
• Waaijers, S.L., A.M. Soeter, S.A.E. Kools, M.H.S. Kraak, J.R. Parsons, W. Admiraal and P. de Voogt, 2011. Biodegradability & Toxicity of Halogen Free Flame Retardants (HFFR). 31st International Symposium on Halogenated Persistent Organic Pollutants (Dioxin), Brussels, Belgium, August 2011.
• Waaijers, S.L., P.D. Gonzalez, A.M. Soeter, SAE. Kools, M.H.S. Kraak, J.R. Parsons, W. Admiraal, and P. de Voogt, 2011. Biodegradability and Toxicity of Halogen Free Flame Retardants. 21rst SETAC-Europe Annual Meeting, Milan, Italy, May 2011.
• Loayza-Muro, R.A., R. Elías-Letts, J.K. Marticorena-Ruiz, E.J. Palomino, M.H.S. Kraak and W. Admiraal, 2011. Benthic macroinvertebrate community responses to metal leaching and ultraviolet radiation in high altitude Andean streams. 21rst SETAC-Europe Annual Meeting, Milan, Italy, May 2011.
• Marinkovic, M., K. de Bruijn, M. Asselman, M.J. Jonker, M.H.S. Kraak and W. Admiraal, 2011. Multi-generation exposure of the midge Chironomus riparius to three model toxicants. 21rst SETAC-Europe Annual Meeting, Milan, Italy, May 2011.
• Marinkovic, M., K. de Bruijn, M. Asselman, M.J. Jonker, M.H.S. Kraak and W. Admiraal, 2011. Multi-generation exposure of the non-biting midge Chironomus riparius to three model toxicants. Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, February 2011.
• Hunting, E.R., M.H. Whatley, M.H.S. Kraak, H.G. van der Geest, C. Mulder, A.M. Breure and W. Admiraal, 2010. Invertebrate effect traits mediate detritus processing rates. Joint ASLO & NABS 2010 Summer Meeting, Santa Fe, New Mexico, USA, June 2010.
• Rakovicky, T, M.H.S. Kraak and C.A.M. van Gestel, 2010. Theoretical and experimental approaches to aquatic and soil toxicity of waste and construction products. 20th SETAC-Europe Annual Meeting, Sevilla, Spain, May 2010.
• Loayza-Muro, R., R. Elías-Letts, J. Marticorena-Ruíz, J. Palomino, J. Duivenvoorden, M.H.S. Kraak and W. Admiraal, 2010. Metal induced shifts in benthic macroinvertebrate community composition in Andean high altitude streams. 20th SETAC-Europe Annual Meeting, Sevilla, Spain, May 2010.
• Marinkovic, M., R. Verweij, G. Nummerdor, M. Jonker, M.H.S. Kraak and W. Admiraal, 2010. Life cycle responses of the midge Chironomus riparius to toxicants with different modes of action. 20th SETAC-Europe Annual Meeting, Sevilla, Spain, May 2010.
• Kraak, M.H.S., J. Ament, A. Burridge, T. Swierts, S. Waaijers and M. Marinkovic, 2010. Metal mixture toxicity to Daphnia magna. 20th SETAC-Europe Annual Meeting, Sevilla, Spain, May 2010.
• Marinkovic, M. and M.H.S. Kraak, 2009. Decelopment of an easily-made artificial sediment that reduces experimental variability. 21 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2009.
• Soeter, A.M., F.A.A. Bakker, M. Velthuis, R.A. Verweij, M.H.S. Kraak and J.A.J. Breeuwer, 2009. The selective environment: changes in chironomid community composition and genetic adaptation of Chironomus riparius in response to metal pollution. 21 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2009.
• Loayza-Muro, R., R. Elías-Letts, J. Marticorena-Ruíz, J. Palomino, J.F. Duivenvoorden, M.H.S. Kraak and W. Admiraal, 2009. Cambios Inducidos por Metales en la Composición de Comunidades de Macroinvertebrados Bentónicos en Arroyos Altoandinos: Identificación de Bioindicadores de Calidad de Agua. 9th SETAC Latin America Annual Meeting, Lima, Peru, October 2009.
• Leon Paumen, M., N.M. van Straalen, W. Admiraal, C.A.M. van Gestel and M.H.S. Kraak, 2009. Deriving soil and sediment risk limits from invertebrate life cycle responses to Polycyclic Aromatic Compound exposure. 19th SETAC-Europe Annual Meeting, Göteborg, Sweden, May 2009.
• Kraak, M.H.S., H.M. Ens, A.T. Henstra, S. Mohammadin, Y.S. Vogelzang, A.E. Wagenmaker and M. Marinkovic, 2009. Metal mixture toxicity to Daphnia magna. 19th SETAC-Europe Annual Meeting, Göteborg, Sweden, May 2009.
• Baas, J., J. Willems, T. Jager, M.H.S. Kraak, T. Vandenbrouck and S.A.L.M. Kooijman, 2009. Predicting daphnid survival after in situ exposure to complex mixtures. 19th SETAC-Europe Annual Meeting, Göteborg, Sweden, May 2009.
• Cerbin, S., M.H.S. Kraak, P. de Voogt, P. Visser and E. van Donk, 2009. The combined effects of microcystin LR and carbaryl on Daphnia pulicaria. 19th SETAC-Europe Annual Meeting, Göteborg, Sweden, May 2009.
• Admiraal, W., E. Van der Grinten and M.H.S. Kraak, 2009. Periodic flooding restrains local succession of microphytobenthos in floodplain lakes. ASLO Aquatic Sciences Meeting 2009, Nice, France, January 2009.
• Boonstra, M., M. Asselman, P. Maas, R.A. Verweij, J.A.J. Breeuwer and M.H.S. Kraak, 2009. Persistence of chironomids in metal polluted environments. 20 ^e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2008.
• Leon Paumen, M., P. Stol, T.L. ter Laak, M.H.S. Kraak, C.A.M. van Gestel and W. Admiraal, 2008. Chronic exposure of the oligochaete Lumbriculus variegatus to Polycyclic Aromatic Compounds (PACs): bioavailability and effects on reproduction. 18th SETAC-Europe Annual Meeting, Warsaw, Poland, May 2008.
• Kraak, M.H.S., S. de Groot, I. van Moorselaar, T. Scheufen, B. de Vries and J.A.J. Breeuwer, 2008. Micro evolution of metal adaptation in the midge Chirinomus riparius. 18th SETAC-Europe Annual Meeting, Warsaw, Poland, May 2008.
• Van der Grinten, E., E.J. van den Brandhof, R. Siers, G. Stroomberg and M.H.S. Kraak, 2008. Application of antibiotic sensitive bioassays to assess water and waste water quality. 4 ^th NORMAN workshop, Lyon, France, March 2008.
• De Groot, S., I. van Moorselaar, T. Scheufen, B. de Vries, J.A.J. Breeuwer and M.H.S. Kraak, 2007. Population genetics of metal adaptation in the midge Chironomus riparius. 19e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2007.
• Leon Paumen, M., E. Steenbergen, M.H.S. Kraak and C.A.M. van Gestel, 2007. Population effects in Folsomia candida due to multi-generation exposure to phenanthrene. Scientific Symposium Soil and Water. Zeist, The Netherlands, June 2007.
• Leon Paumen, M., E. Steenbergen, M.H.S. Kraak and C.A.M. van Gestel, 2007. Multi-generation effects of phenanthrene on the springtail Folsomia candida in Lufa 2.2 soil. 17th SETAC-Europe Annual Meeting, Porto, Portugal, May 2007.
• Leon Paumen, M., I. de Jong, R. Groen, M. van der Meulen, F. Dardenne, A. Covaci, L. Bervoets, R. Blust, M. Comber, D. de Schutter, T. Parkerton and M.H.S. Kraak, 2007. TRIAD assessment of a Belgian lowland stream receiving effluent of a polymer production facility. 17th SETAC-Europe Annual Meeting, Porto, Portugal, May 2007.
• Pieters, B.J., M. Liess, M.H.S. Kraak and W. Admiraal, 2007. Daphnia magna population responses to pesticides. 17th SETAC-Europe Annual Meeting, Porto, Portugal, May 2007.
• Pieters, B.J., D. Bosman-Meijerman, E.J. van den Brandhof, P. van Beelen, E. van der Grinten, M.H.S. Kraak and W. Verweij, 2007. Ecological quality assessment of Dutch surface waters: development of a new bioassay with Chydorus sphaericus. 19e Nederlandse Entomologendag, NEV, Ede, The Netherlands, December 2007.
• Kraak, M.H.S., E.M. de Haas, A.A. Koelmans and W. Admiraal, 2006. Persistence of chironomids in polluted sediments. 16th SETAC-Europe Annual Meeting, The Hague, The Netherlands, May 2006.
• Leon Paumen, M. E. Borgman, M.H.S. Kraak, C.A.M. van Gestel, W. Admiraal and N.M. van Straalen, 2006. Isomer specific effects of Polycyclic Aromatic Compounds on the emergence of Chironomus riparius (Diptera, Chironomidae). 16th SETAC-Europe Annual Meeting, The Hague, The Netherlands, May 2006.
• Leon Paumen, M., E. Steenbergen, M.H.S. Kraak and C.A.M. van Gestel, 2006. Population effects in Folsomia candida due to multi-generation exposure to phenanthrene. 7th International Seminar on Apterygota. Texel, The Netherlands, August 2006.
• Leon Paumen, M., S. Droge, E.A.J. Bleeker, M.H.S. Kraak, C.A.M. van Gestel, W. Admiraal and N.M. van Straalen, 2005. Chronic toxicity of PACs to the soil invertebrates Folsomia candida (Collembola) and Enchytraeus crypticus (Oligochaeta). 20th Int. Symp. on Polycyclic Aromatic Compounds. Toronto, Canada, August 2005.
• Osano, O., S. Mogere, E.A.J. Bleeker, M.H.S. Kraak and W. Admiraal, 2005. Potential of chironomids as sentinels of pollution in the Nzoia river, Kenya. 12 ^th International Symposium on toxicity assessment. Skiathos island, Greece, June 2005.
• De Haas, E.M., A.A. Koelmans, M.H.S. Kraak and W. Admiraal, 2004. Persistence of benthic invertebrates in polluted sediments. Netherlands Scientific Symposium Soil & Water. Zeist, The Netherlands, June 2004.
• Bleeker, E.A.J., S.T.J. Droge, S. Wiegman, C.A.M. van Gestel and M.H.S. Kraak, 2003. Toxicity of PACs: a comparison between aquatic and terrestrial organisms. 13th SETAC-Europe Annual Meeting, Hamburg, Germany, April 2003.
• Bleeker, E.A.J., S.T.J. Droge, S. Wiegman, C.A.M. van Gestel and M.H.S. Kraak, 2003. Toxicity of PACs: a comparison between aquatic and terrestrial organisms. 19th ISPAC Symposium, Amsterdam, The Netherlands, September 2003.
• Droge, S.T.J., E.A.J. Bleeker, C.A.M. van Gestel, S. Wiegman and M.H.S. Kraak, 2003. Chronic effects of homocyclic and N-heterocyclic PACs on Folsomia candida and Enchytraeus crypticus. 13th SETAC-Europe Annual Meeting, Hamburg, Germany, April 2003.
• Droge, S.T.J., E.A.J. Bleeker, C.A.M. van Gestel, S. Wiegman and M.H.S. Kraak, 2003. Chronic effects of homocyclic and N-heterocyclic PACs on Folsomia candida and Enchytraeus crypticus. 19th ISPAC Symposium, Amsterdam, The Netherlands, September 2003.
• Heugens E.H.W., D.T. Jager, A.J. Hendriks, M.H.S. Kraak, N.M. van Straalen and W. Admiraal, 2003. Predicting the combined effects of toxicants and environmental factors on aquatic biota. AIO/OIO dagen Nederlandse Vereniging voor Toxicologie, Utrecht, January 2003.
• Heugens E.H.W., D.T. Jager, A.J. Hendriks, M.H.S. Kraak, N.M. van Straalen and W. Admiraal, 2003. Modeling the combined effects of cadmium and environmental factors on Daphnia magna. 13th SETAC-Europe Annual Meeting, Hamburg, Germany, April 2003.
• Leslie, H.A., M.H.S. Kraak and J.L.M. Hermens, 2003. Estimating body residues and baseline toxicity of a complex petrochemical mixture in sediment. 13th SETAC-Europe Annual Meeting, Hamburg, Germany, April 2003.
• Wiegman, S., E.A.J. Bleeker, S.T.J. Droge, C.A.M. van Gestel and M.H.S. Kraak, 2003. Ecotoxicity of sediment associated PAC isomers to the midge Chironoumus riparius. 19th ISPAC Symposium, Amsterdam, The Netherlands, September 2003.
• Bleeker, E.A.J., S. Wiegman, P. de Voogt, M.H.S. Kraak, H.A. Leslie, E.M. de Haas and W. Admiraal, 2002. Toxicity of azaarenes - a review. 12th SETAC-Europe Annual Meeting, Vienna, Austria, May 2002.
• De Haas, E.M., B. Reuvers, C.T.A. Moermond, A.A. Koelmans and M.H.S. Kraak, 2002. Responses of benthic invertebrates to combined toxicant and food input in flood plain lake sediments. 12th SETAC-Europe Annual Meeting, Vienna, Austria, May 2002.
• Heugens E.H.W., R. Creyghton, A.J. Hendriks, M.H.S. Kraak and W. Admiraal, 2002. Joint effects of cadmium and temperature on Daphnia magna related to accumulation rates. 12th SETAC-Europe Annual Meeting, Vienna, Austria, May 2002.
• Leslie, H.A., M.H.S. Kraak and J.L.M. Hermens, 2002. Biomemetic extraction with SPME to estimate critical body residues and baseline toxicity. 12th SETAC-Europe Annual Meeting, Vienna, Austria, May 2002.
• Leslie, H.A., M.H.S. Kraak and J.L.M. Hermens, 2002. Solid phase microextraction: passive sampling technique to estimate body residues of organic chemicals. 23rd SETAC-North America Annual Meeting, USA, November 2002.
• Wiegman, S., M.H.S. Kraak, P. de Voogt, R.W.P.M. Laane and W. Admiraal, 2002. Photoenhanced toxicity of azaarenes to marine phytoplankton. 12th SETAC-Europe Annual Meeting, Vienna, Austria, May 2002.
• Bleeker, E.A.J., B.J. Pieters, S. Wiegman and M.H.S. Kraak, 2001. Comparative (photo-enhanced) toxicity of homocyclic and heterocyclic PAHs. 18th International Symposium on Polycyclic Aromatic Compounds.Cincinnati, Ohio, USA, September 2001.
• De Haas, E.M., B. Reuvers, C.M. Moermond, M.-J. Caramujo, A.A. Koelmans and M.H.S. Kraak, 2001. Species-specific responses of benthic invertebrates to gradients of eutrophication and contamination in sediments of flood plain lakes. 49th Annual Meeting NABS, La Crosse, Wisconsin, USA, June 2001.
• Leslie, H.A., A.J.P. Oosthoek, F.J.M. Busser, M.H.S. Kraak and J.L.M. Hermens, 2001. Baseline toxicity of mixtures: measuring and estimating TBR. 11th SETAC-Europe Annual Meeting, Madrid, Spain, May 2001.
• Leslie, H.A., F. Busser, J. Hermens and M.H.S. Kraak, 2001. Baseline toxicity of mixtures: measuring and estimating total body residue. Scientific meeting of the Netherlands Society of Toxicology, Nijmegen, November 2001.
• Van der Geest, H.G., G.D. Greve and M.H.S. Kraak, 2001. Insecten in vervuilde rivieren. 13e Nederlandse Entomologendag, NEV, Amsterdam, The Netherlands, December 2001.
• Wiegman, S., C. Barranguet, P. de Voogt, M.H.S. Kraak, R.W.P.M. Laane and W. Admiraal, 2001. Photochemical and biological transformation of azaarenes: effects on marine phytoplankton. 18th International Symposium on Polycyclic Aromatic Compounds.Cincinnati, Ohio, USA, September 2001.
• Admiraal, W., N. Ivorra, C. Barranguet and M.H.S. Kraak, 2000. Changes in riverine microbenthic communities under metal stress. 3rd SETAC World Congress, Brighton, UK, May 2000.
• Greve, G.D., H. G. van der Geest, E. M. de Haas, A. Kroon, S. Kuyl, B. B. Scheper and M.H.S. Kraak, 2000. Validation of newly developed ecotoxicity tests using typical riverine insects, the caddisflies Hydropsyche angustipennis and Cyrnus trimaculatus and the mayfly Ephoron virgo. Biological problems in large rivers symposium, Bonn, Germany, April 2000.
• Kraak, M.H.S., E.A.J. Bleeker, P. de Voogt, H.A.J. Govers and W. Admiraal, 2000. Toxicity of azaarenes: mechanisms and metabolism. 3rd SETAC World Congress, Brighton, UK, May 2000.
• Kraak, M.H.S., 2000. Ecotoxicity of mixtures of metals to the zebra mussel Dreissena polymorpha. Workshop on bioavailability and physiological responses of bivalves to metals, Antwerpen, Belgium, November 2000.
• Leslie, H.A., S.T.J. Droge, A. Oosthoek, F.J.M. Busser, M.H.S. Kraak and J.L.M. Hermens, 2000. Biomemetic extractions using SPME to predict bioconcentration and effects of halogenated aromatics. 3rd SETAC World Congress, Brighton, UK, May 2000.
• Leslie, H.A., T. Ter Laak, L. van der Wal, A.J.P. Oosthoek, F.J.M. Busser, M.H.S. Kraak and J.L.M. Hermens, 2000. Biomimetic SPME approach to estimation of body residues and baseline toxicity. 21st SETAC-North America Annual Meeting, Nashville, TN, USA, November 2000.
• Van der Geest, H.G., G.D. Greve, M.H.S. Kraak and W. Admiraal, 2000. Insects in polluted rivers: an experimental analysis. Biological problems in large rivers symposium, Bonn, Germany, April 2000.
• Van der Geest, H.G., G.D. Greve and M.H.S. Kraak, 2000. Insects in polluted rivers: an experimental analysis. 3rd SETAC World Congress, Brighton, UK, May 2000.
• Van der Geest, H.G., G.D. Greve and M.H.S. Kraak, 2000. Insects in polluted rivers: an experimental analysis. 48th Annual Meeting North American Benthological Society, Keystone, Colorado, USA, May 2000.
• Van der Geest, H.G., G.D. Greve, M.H.S. Kraak en W. Admiraal. Insecten in vervuilde rivieren: een experimentele analyse. NECOV wintermeeting, Wageningen, December 2000.
• Wiegman, S., J. Termeer, T. Verheul, P. de Voogt, M.H.S. Kraak and W. Admiraal, 2000. Phototoxicity of acridine to the marine diatom Phaeodactylum tricornutum. 3rd SETAC World Congress, Brighton, UK, May 2000.
• Bleeker, E.A.J., H.J.C. Klamer, H.A. Leslie, M. Plans, E. Wind, H.G. van der Geest, P. de Voogt and M.H.S. Kraak, 1999. Acute toxicity, chronic toxicity and genotoxicity of azaarenes: isomers and metabolites. 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• Curran, F.T.C., D. Groenedijk, C.H. Augustijn and M.H.S. Kraak, 1999. Community structure and bioassay analysis of effects of acid mine drainage (AMD) from an Irish river on Chironomidae (Diptera: Insecta). 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• De Haas, E.M., H.G. van der Geest, G.D. Greve and M.H.S. Kraak, 1999. Behavioural and (sub)lethal responses of larvae of the riverine caddisfly Hydropsyche angustipennis exposed to copper. 47th Annual Meeting North American Benthological Society, Duluth, Minnesota, USA, May 1999.
• De Voogt, P., E. Bleeker, S. Wiegman, M.H.S. Kraak, W. Admiraal and H. Govers, 1999. Azaarene transformation and toxicity to aquatic organisms. 17th International Symposium on Polycyclic Aromatic Compounds. Bordeaux, France, October 1999.
• Greve, G.D., H.G. van der Geest, S.C. Stuijfzand, E.M. de Haas, A. Kroon, S. Kuyl, B.B. Scheper and M.H.S. Kraak, 1999. Validation of newly developed toxicity tests using typical riverine insects, the caddisflies Hydropsyche angustipennis and Cyrnus trimaculatus and the mayfly Ephoron virgo. 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• Kraak, M.H.S., H.G. van der Geest, S.C. Stuijfzand, G.D. Greve, M.E. Boivin and C.A.M. Van Gestel, 1999. Recent developments in mixture toxicity testing. 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• Leslie, H.A., T.I. Pavluk, A. bij de Vaate and M.H.S. Kraak, 1999. Triad assessment of the impact of chromium pollution on macrozoobenthos in the Chusovaya River (Russia). 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• Van der Geest, H.G., G.D. Greve, A. Kroon, S. Kuijl and M.H.S. Kraak, 1999. Characteristic riverine insects, the caddisfllies Hydropsyche angustipennis and Cyrnus trimaculatus and the mayfly Ephoron virgo, exposed to copper and diazinion. 47th Annual Meeting North American Benthological Society, Duluth, Minnesota, USA, May 1999.
• Wiegman, S., E. Charadoni, S.A.M. van Beusekom, G. Vriezekolk, M.H.S. Kraak and W. Admiraal, 1999. The role of light in acridine transformation and toxicity to algae. 9th SETAC-Europe Annual Meeting, Leipzig, Germany, May 1999.
• Greve, G.D., H.G. van der Geest, A. Kureck and M.H.S. Kraak, 1998. Ecotoxicity test using field collected eggs of the riverine mayfly Ephoron virgo. 10e Nederlandse Entomologendag, NEV, Leiden, The Netherlands, December 1998.
• Groenendijk, D., M.H.S. Kraak and W. Admiraal, 1998. Key factors influencing metal adaptation in the midge Chironoumus riparius. VII International Congress of Ecology, Florence, Italy, July 1998.
• Kraak, M.H.S., E.A.J. Bleeker, H.G. van der Geest, H.J.C. Klamer, P. de Voogt and W. Admiraal, 1998. Toxic and genotoxic effects of azaarenes: isomers and metabolites. 1st International Symposium on Micropollutants. Amsterdam, The Netherlands, May 1998.
• Kraak, M.H.S., S.C. Stuijfzand, H.G. van der Geest and G.D. Greve, 1998. Does the water quality of the rivers Rhine and Meuse hamper the distribution of the caddisfly Hydropsyche angustipennis? XXVII SIL Congress, Dublin, Ireland, August 1998.
• Kraak, M.H.S., S. Stuijfzand, G. Greve, M.E. Boivin, H. van der Geest and K. van Gestel, 1998. Ontwikkelingen in de mengseltoxiciteit: mengsels van meer dan twee metalen en aandacht voor de vorm van de dosis-effectrelatie van de afzonderlijke stoffen. KNCV/NVT Mengseltoxiciteit Symposium. Amsterdam, november 1998.
• Leslie, H.A., T.I. Pavluk, A. Bij de Vaate and M.H.S. Kraak, 1998. Larvae of the caddisfly Hydropsyche pellucidula (Trichoptera) under influence of chromium in the Chusovaya river (Urals, Russia): morphological abnormalities and bioaccumulation. 10e Nederlandse Entomologendag, NEV, Leiden, The Netherlands, December 1998.
• Stuijfzand, S.C., L. Poort, G.D. Greve, H.G. van der Geest, M.H.S. Kraak and W. Admiraal, 1998. Impact of the insecticide diazinon on macrofauna in the river Meuse assessed by in situ exposure and laboratory toxicity testing. 1st International Symposium on Micropollutants. Amsterdam, The Netherlands, May 1998.
• Van der Geest, H.G., G.D. Greve, B.B. Scheper, E.M. de Haas and M.H.S. Kraak, 1998. Key factors limiting the distribution of sensitive aquatic insect species: effects of copper and diazinon on larvae of the caddisfly Hydropsyche angustipennis. 9th International Symposium on Trichoptera. Chiang Mai, Thailand, January 1998.
• Bleeker, E.A.J., E. Wind, H.G. van der Geest, H.J.C. Klamer, M.H.S. Kraak, A.C. Vermeulen and D. Groenendijk, 1997. Is there a relationship between direct toxic, genotoxic and teratogenic effects of NPAHs to the midge Chironomus riparius? 7th SETAC-Europe Annual Meeting, Amsterdam, The Netherlands, April 1997.
• Bleeker, E.A.J., H.G. van der Geest, H.J.C. Klamer, P. de Voogt, E. Wind, and M.H.S. Kraak, 1997. Toxic, genotoxic and teratogenic effects of NPAHs: isomers and metabolites. 16th International Symposium on Polycyclic Aromatic Compounds. Charlotte, North Carolina, U.S.A., November 1997.
• De Haas, E.M., H.G. van der Geest, G.D. Greeve and M.H.S. Kraak, 1997. Behavioural responses and survival of larvae of the riverine caddisfly Hydropsyche angustipennis exposed to copper. 4th Benelux Congress of Zoology. Utrecht, The Netherlands, November, 1997.
• De Voogt, P., O.C. Oudendijk, E.A.J. Bleeker, H.G. van der Geest, P.L.A. van Vlaardingen and M.H.S. Kraak, 1997. Structure-related ecotoxicity and biotransformation of azaarenes. 18th SETAC Annual Meeting. San Francisco, CA, USA, November 1997.
• Greve, G.D., H.G. van der Geest, S.C. Stuijfzand and M.H.S. Kraak, 1997. Development of an ecotoxicity test using laboratory reared larvae of the riverine caddisflies Hydropsyche angustipennis and Cyrnus trimaculatus. 9e Nederlandse Entomologendag, NEV, Leiden, The Netherlands, December 1997.
• Ivorra, N., J. Hettelaar, G.M.J. Tubbing, M.H.S. Kraak, S. Sabater and W. Admiraal, 1997. Translocation of natural perifhyton communities: an in situ method for evaluating the effects of toxicants and nutrients. 7th SETAC-Europe Annual Meeting, Amsterdam, The Netherlands, April 1997.
• Ivorra, N., J. Hettelaar, G.M.J. Tubbing, M.H.S. Kraak, S. Sabater and W. Admiraal, 1997. Translocation of natural perifhyton communities: an in situ method for evaluating the effects of toxicants and nutrients. Sixth International Phycological Congress, Leiden, The Netherlands, August 1997.
• Klamer, H.J.C., C.S.H. Govers, E.A.J. Bleeker, M.H.S. Kraak and W. Admiraal, 1997. Bacterial genotoxicity of nitrogen-containing PAHs. 7th SETAC-Europe Annual Meeting, Amsterdam, The Netherlands, April 1997.
• Kraak, M.H.S., S.C. Stuijfzand and W. Admiraal, 1997. The interaction between organic matter and toxicants in polluted river water: stimulating and inhibiting effects on the midge Chironomus riparius. 13th International Symposium on Chironomidae. Freiburg, Germany, September 1997.
• Poort, L., S.C. Stuijfzand, G.D. Greeve and M.H.S. Kraak, 1997. What were the effects of an insecticide calamity in the river Meuse on two representative macrofauna species? 4th Benelux Congress of Zoology. Utrecht, The Netherlands, November, 1997.
• Van der Geest, H.G., E.A.J. Bleeker, M.H.S. Kraak, P. de Voogt and W. admiraal, 1997. Explaining differences in toxicity of azaarenes (NPAHs) to larvae of the midge Chironomus riparius. 7th SETAC-Europe Annual Meeting, Amsterdam, The Netherlands, April 1997.
• De Voogt, P., P. van Vlaardingen, E. Bleeker and M.H.S. Kraak, 1996. Biotransformation and toxicity of azaarenes in invertebrates. 6th SETAC-Europe Annual Meeting. Giardini Naxos Taormina, Sicily, Italy, May 1996.
• Stuijfzand, S.C., D. Shen, M. Helms and M.H.S. Kraak, 1996. Stimulating effects of pollution on the midge Chironomus riparius. 44th Annual Meeting North American Benthological Society, Kalispell, Montana, USA, June 1996.
• Stuijfzand, S.C., E, van Ammelrooy, M. Jonker and M.H.S. Kraak, 1996. Ecotoxicological effects of micropollutants on macrofauna in the river Meuse. AIO/OIO Symposium, Doorwerth, The Netherlands, November 1996.
• Bleeker, E.A.J., M.H.S. Kraak and M.C. Buckert-de Jong, 1995. Ecotoxicity of N-substituted polycyclic aromatic hydrocarbons to the midge Chironomus riparius. 7e Nederlandse Entomologendag, Utrecht, The Netherlands, December 1995.
• De Voogt, P., A. Fernandez, P. van Vlaardingen, J. Slobodnik and M.H.S. Kraak, 1995. Biotransformation and analysis of a metabolite of the azaarene acridine. 15th International Symposium on Polycyclic Aromatic Compounds. Belgirate, Italy, September 1995.
• Ivorra, N., M.H.S. Kraak and W. Admiraal, 1995. Use of lake water in testing copper toxicity to desmid species. Fifth SETAC Europe Congress. Copenhagen, Denmark, June 1995.
• Kraak, M.H.S., S.C. Stuijfzand and W. Admiraal, 1995. Short-term ecotoxicity of a mixture of five metals to the zebra mussel ( Dreissena polymorpha). 43rd Annual Meeting North American Benthological Society, Keystone, Colorado, USA, June 1995.
• Kraak, M.H.S., P. van Vlaardingen, C. Ainscough, N. Botman and W. Admiraal, 1995. Short-term and chronic ecotoxicity of N-substituted PAH to the zebra mussel ( Dreissena polymorpha). Fifth SETAC Europe Congress. Copenhagen, Denmark, June 1995.
• Langevoord, M., M.H.S. Kraak and C. Davids, 1995. Importance of prey choice for Cd uptake by carp ( Cyprinus carpio). Abstract  43rd Annual Meeting North American Benthological Society, Keystone, Colorado, USA, June 1995.
• Stuijfzand, S.C., C. Reuther, M.H.S. Kraak and W. Admiraal, 1995. Effects of pollution of the river Meuse on filtration rates of the zebra mussel Dreissena polymorpha. Fifth SETAC Europe Congress. Copenhagen, Denmark, June 1995.
• Stuijfzand, S.C., D. Shen and M.H.S. Kraak, 1995. Effects of pollution from the River Meuse on the Midge Chironomus riparius. 7e Nederlandse Entomologendag, Utrecht, The Netherlands, December 1995.
• Van Vlaardingen, P., M.H.S. Kraak, P. de Voogt, J. Slobodnik, C. Ainscough, N. Botman, A. Fernandez and W. Admiraal, 1995. Short-term and chronic ecotoxicity of N-substituted PAH to the zebra mussel ( Dreissena polymorpha). Second Benelux Congress of Zoology. Leiden, The Netherlands, November 1995.
• Langevoord, M., M.H.S. Kraak and C. Davids, 1994. Importance of prey choice for Cd uptake by carp ( Cyprinus carpio). First Benelux Congress of Zoology. Leuven, Belgium, November 1994.
• Wiegman, S., P. de Voogt, M.J.M. van Velzen and M.H.S. Kraak, 1994. PCB in Dreissena polymorpha: Accumulation, elimination, metabolism and effects on filtration rate. First Benelux Congress of Zoology. Leuven, Belgium, november 1994.
• Kraak, M.H.S., 1993. Chronic ecotoxicty of mixtures of metals to the zebra mussel Dreissena polymorpha. First SETAC World Conference, Lisboa, Portugal, March 1993.
• Bleeker, E.A.J., M.H.S. Kraak and C. Davids, 1992. Ecotoxicity of lead to the zebra mussel Dreissena polymorpha. Second European Conference on Ecotoxicology, Amsterdam, The Netherlands, May 1992.
• Kraak, M.H.S., 1992. Chronic ecotoxicty of mixtures of metals to the zebra mussel Dreissena polymorpha. Second European Conference on Ecotoxicology, Amsterdam, The Netherlands, May 1992.
• Kraak, M.H.S., 1992. Chronic ecotoxicty of mixtures of metals to the zebra mussel Dreissena polymorpha. XXV SIL Conference, Barcelona, August 1992.
• Kuipers, F., M.H.S. Kraak and C. Davids, 1992. The effects of contaminated surface water on the filtration rate of the freshwater mussel Dreissena polymorpha. Second European Conference on Ecotoxicology, Amsterdam, The Netherlands, May 1992.
• Kraak, M.H.S., D. Lavy, M. Toussaint, H. Schoon, W.H.M. Peeters and N.M. van Straalen, 1991. The effects of acute and chronic exposure to mixtures of heavy metals on the filtration rate and survival of the freshwater mussel Dreissena polymorpha. SETAC-Europe Founding Conference. Sheffield, England, April 1991.
• Kraak, M.H.S., M. Toussaint, D. Lavy and C. Davids, 1991. The effects of heavy metals on the filtration rate of the freshwater mussel Dreissena polymorpha. S.I.L. Conference, München, August 1989. Verh. Internat. Verein. Limnol. 24: 2246.
• Kraak, M.H.S., C. Davids and C.J. de Groot, 1990. The effect of the parasite Phyllodistomum sp. (Trematoda) on heavy metal concentrations in the freshwater mussel Dreissena polymorpha. 12th ESCPB Conference. Utrecht, August 1990.
• Kraak, M.H.S., D. Lavy and M. Toussaint, 1990. The effect of mixtures of heavy metals on the filtration rate of the freshwater mussel Dreissena polymorpha. 11th Annual SETAC meeting. Arlington, Virginia, U.S.A., November 1990.
• Kraak, M.H.S., 1990. The effects of heavy metals on the ecological functioning of the freshwater mussel Dreissena polymorpha. Invited lecture N.O.A.A., Great Lakes Environmental Research Laboratory, Ann Arbor, Michigan, U.S.A. November 1990.
• Lavy, D., M.H.S. Kraak and C. Davids, 1990. The effect of chronic exposure to copper on the filtration rate of the freshwater mussel Dreissena polymorpha. 12th ESCPB Conference. Utrecht, The Netherlands, August 1990.
• Lavy, D., M.H.S. Kraak, M. Toussaint and C. Davids, 1990. The effect of an equitoxic mixture of Cu, Zn and Cd on the filtration rate of the freshwater mussel Dreissena polymorpha. Neth. J. Zool. 40 (3): 548.
• Toussaint, M., M.H.S. Kraak, D. Lavy and C. Davids, 1990. The effect of a mixture of copper and zinc on the filtration rate of the freshwater mussel Dreissena polymorpha. 12th ESCPB Conference. Utrecht, August 1990.
• Timmermans, K.R. and M.H.S. Kraak, 1989. Differences in heavy metal concentration in aquatic organisms as related to their feeding habit. Neth. J. Zool. 38 (2/4): 214-215.
• Kraak, M.H.S., and C. Davids, 1988. The effects of heavy metals on the filtration capacity of the freshwater mussel Dreissena polymorpha (Pallas). First European Conference on Ecotoxicology, Copenhagen, Denmark, October 1988.
• Timmermans, K.R., M.H.S. Kraak and B. van Hattum, 1988. Speciation of heavy metals in sediments and water of the maarsseveen lake system, and the bioavailability to macroinvertebrates. Proc. Int. Conf. Trace Metals in Lakes. Hamilton. Ontario. p. 70.
• Kraak, M.H.S., C.A.J. Denneman and N.M van Straalen, 1987. Soil fauna parameters in forests affected by acid deposition. Neth. J. Zool. 37 (3/4): 431.
• Wagner, A.M., M.H.S. Kraak and L.H.W. van der Plas, 1987. Interactions between NADH- and succinate oxidation in potato tuber callus mitochondria. Acta Bot. Neerl. 36 (2) suppl. 1: 65.

Current PhD projects

Mud matters: the significance of effect based sediment quality assessment

Nienke Wieringa, Steven Droge, Piet Verdonschot, Michiel Kraak.

2016-2022.

Funded by NWO.

Combatting cyanobacteria with hydrogen peroxide

Erik Weenink, Petra Visser, Jef Huisman, Michiel Kraak.

Funded by NWO-TTW.

Psychopharmaceutical Prevention & Pilots to Reduce Effects in the water cycle

Charlie Davey, Michiel Kraak, Antonia Praetorius, Thomas ter Laak, Annemarie van Wezel.

2020-2024.

Funded by NWO.

Life-cycle habitat requirements of lowland stream macroinvertebrates

Elmar Becker, Ralf Verdonschot, Arie Vonk, Michiel Kraak, Piet Verdonschot.

2020-2024.

Funded by UvA-IBED.

Environmental fate, bioavailability and bioaccumulation of PFAS

Ioanna Gkika, Thomas ter Laak, Annemarie van Wezel, Kees van Gestel, Michiel Kraak.

2021-2025.

Funded by NWO-TTW.

Toxicity and risks of selected per- and polyfluoroalkyl substances in aquatic and terrestrial ecosystems

Skylar Xie, Arie Vonk, Annemarie van Wezel, Kees van Gestel, Michiel Kraak.

2021-2025.

Funded by NWO-TTW.

Temporal variation in toxic pressure in agricultural ditches

Harry Boonstra, Milo de Baat, Ivo Roessink, Annemarie van Wezel, Michiel Kraak.

2021-2026.

Funded by Wetterskip Fryslân.​​

Natural filtering capacity of aquatic systems

Annalieke Bakker, Tom van der Meer, Piet Verdonschot, Michiel Kraak.

2022-2026.

Funded by LNV.

Drivers of food web structure, stability and resilience in lake Markermeer

Laura Tack, Harm van der Geest, Arie Vonk, Jef Huisman, Michiel Kraak.

2022-2028.

Funded by RWS.

Assessing single stressors and stressor interaction in multistressed stream ecosystems

Leon van Kouwen, Piet Verdonschot, Michiel Kraak.

2022 - 2028.

Funded by NWO.

Finished PhD projects

Current MSc projects

• Joint toxicity of microplastics and PFAS to springtails. Nienke Schut. Suervision: Kees van Gestel (VU), Marja Lamoree (VU), Michiel Kraak.
• The effectiveness of advanced treatments in cleaning wastewater of pharmaceuticals (literature review). Lotte Thieme. Supervision: Charlie Davey, Thomas ter Laak, Michiel Kraak.

Finished in 2024

• Discrepancies and harmonization of PFAS quality standards in Europe (literature review). Sam Arnolds. Supervision: Mohammad Sadia, Annemarie van Wezel, Michiel Kraak.
• Mitigating marine oil spills: the effectiveness of bioremediation (literature review). Bess Hovers. Supervision: Milo de Baat, Michiel Kraak.

Finished in 2023

• Enhancing stream restoration by reviewing the life cycle and habitat requirements of Limnephilid caddisflies (Limnephilidae, Trichoptera) in Dutch lowland streams (literature review). Mees Beaumont. Supervision: Elmar Becker, Ralf Verdonschot, Michiel Kraak.
• Location specific impact of anthropogenic barriers on river ecosystems (literature review). Lorenzo Goedhardt. Supervision: Arie Vonk, Michiel Kraak.
• Distribution and composition of macro and meso plastic in the rivers Rhine and IJssel. Sanne Janssen. Supervision: Margriet Schoor (RWS), Michiel Kraak.
• Responses of wetland insects to elevated temperature and drought. Charlotte Chambers Moreira. Supervision: Elmar Becker, Arie Vonk, Michiel Kraak.
• The risks of exposure to glyphosate for non-target terrestrial and aquatic plants and fungi (literature review). Merlijn van de Ven. Supervision: Michel Haring, Michiel Kraak.
• Chronic ecotoxicity of short-chain PFAS to sediment and aquatic organisms. Marta Ferreira da Silva. Supervision: Skylar Xie, Arie Vonk, Michiel Kraak.
• The relationship between molecular properties and ecotoxicity of per- and polyfluoroalkyl substances (PFAS) to microalgae. Wanda Puijk. Supervision: Skylar Xie, Arie Vonk, Michiel Kraak.
• Aquatic ecotoxicity of safe and sustainable by design organophosphate flame retardants. Bianca Stadelmann. Supervision: Hannah Flerlage, Chris Slootweg, Michiel Kraak.
• Impact of temperature and drought intensity on the distribution and development of two lowland stream insects. Jelmer Klaassen. Supervision: Elmar Becker, Arie Vonk, Michiel Kraak.
• Contaminated sediments: an environmental compartment of concern (literature review). Annabel Landman. Supervision: Harry Boonstra (Wetterskip Fryslân), Harm van der Geest, Michiel Kraak.
• Towards a comprehensive risk assessment for TFA substances (literature review). Marieke Versluis. Supervision: Mohammad Sadia, Ioanna Gkika, Annemarie van Wezel, Michiel Kraak.
• Understanding the impact of pumping stations on Abramis brama mortality in the Netherlands. Lorenzo Goedhardt. Supervision: R. Heins (RWS), Harm van der Geest, Michiel Kraak.

Finished in 2022

• Evaluating a substance-group specific Mixture Assessment Factor (MAF) for reducing current mixture toxicity risks in Dutch surface waters. Lisa van Eck. Supervision: Emiel Rorije (RIVM), Leo Posthuma (RIVM), Michiel Kraak.
• Environmental fate and bioaccumulation of Per- and Polyfluoroinated Substances (PFAS). Jildou Dijkstra. Supervision: Ioanna Gkika, Arie Vonk, Michiel Kraak.
• Persistent Mobile Organic Chemicals: A threat to aquatic ecosystems? A case study on pesticides and their persistence, mobility, and toxicity (literature review). Aishwarya Nair. Supervision: Thomas ter Laak, Annemarie van Wezel, Michiel Kraak.
• An ecology-based morphological assessment method. Luc Kauhl. Supervision: Piet Verdonschot, Michiel Kraak.

Finished in 2021

• An ecology-based morphological assessment method. Luc Kauhl. Supervision: Piet Verdonschot, Michiel Kraak.

• Assessment of the abiotic environmental variability and water quality of Curacao’s inland bays. Supervision: Milo de Baat, Verena Schoepf, Michiel Kraak.
• Contaminated WWTP sludge degradation by benthic macroinvertebrates with different feeding traits. Lisa van Eck. Supervision: Tom van der Meer, Piet Verdonschot, Michiel Kraak.
• The effect of intraspecific interactions within C. riparius on WWTP sludge degradation. Annabel Landman. Supervision: Tom van der Meer, Piet Verdonschot, Michiel Kraak.
• Flow velocity tolerance of macroinvertebrates in Dutch sandy lowland streams (literature review). Timo van den Eeckhout. Supervision: Jip de Vries, Piet Verdonschot, Michiel Kraak.
• Unravelling the combined effects of sediment associated food and toxicants on aquatic invertebrates by passive sampling - passive dosing tests.  Aishwarya Nair. Supervision: Nienke Wieringa, Thomas ter Laak, Michiel Kraak.
• The effects of pesticide pulses on aquatic ecosystems (literature review). Annalieke Bakker. Supervision: Harry Boonstra (Waterschap Friesland), Arie Vonk, Michiel Kraak.
• Life-cycle and habitat requirements of lowland stream caddisflies (Trichoptera) affected by multiple stressors (literature review). Shèraga van Wetten. Supervision: Elmar Becker, Ralf Verdonschot, Michiel Kraak.
• Review of technologies available for the removal of micro-plastics from wastewater (literature review). El Collinson. Supervision: Annemarie van Wezel, Michiel Kraak.

Finished in 2020

• Toxicity to rooting macrophytes and possibilities for phytoremediation of contaminated urban sediments. Sofia Dornellas. Supervision: Arie Vonk, Michiel Kraak.
• Enhanced remineralization and cycling of nutrients in activated sludge by the freshwater isopod Asellus aquaticus. Siena Schickler. Supervision: Tom van der Meer, Piet Verdonschot, Michiel Kraak.
• Longitudinal assessment of estrogenic activity along the New River (USA). Michelle Pena-Ortiz. Supervision: Shea Tuberty (Appalachian State University), Michiel Kraak.
• The missing plastic: marine plastic ingestion (literature review). Justin van Klaveren. Supervision: Laurant Lebreton (The Ocean Cleanup), Sarah-Jeanne Royer (The Ocean Cleanup), Michiel Kraak.
• Drivers for successful establishment and growth in restoration of (sub)tropical seagrasses and mangroves (literature review). Marijn van Doorn. Supervision: Arie Vonk, Michiel Kraak.
• Review of the impacts of microplastics and nanoplastics on marine organisms: from manufacturing to uptake (literature review). Chloe Wayman. Supervision: Helge Niemann (NIOZ), Annemarie van Wezel, Michiel Kraak.
• The added value of multigeneration toxicity tests (literature review). Lotte de Jeu. Supervision: Kees van Gestel (VU), Michiel Kraak.
• Assessing active and passive samplers for water quality monitoring in Dutch surface waters. Romee Prijden. Supervision: Steven Droge, Michiel Kraak.
• Assessment of transitional water body restoration: the effects of salinity gradients on fish distribution (literature review). Tijs Joling. Supervision: Arie Vonk, Michiel Kraak.
• Dissolved oxygen thresholds of freshwater macroinvertebrates with different respiratory traits: a review (literature review). Bart van Hall. Supervision: Jip de Vries, Piet verdonschot, Michiel Kraak.
• Sulfite disproportionation by the extremophilic soda lake bacterium Desulfurivibrio alkaliphilus. Marijn van Doorn. Supervision: Emily Melton, Gerard Muijzer, Lucas Stal, Michiel Kraak.

Finished in 2019

• Structure versus function along a eutrophication gradient: Macroinvertebrate and functional microbial community composition and their role in organic matter decomposition. Annalieke Bakker. Supervision: Gea van der Lee, Arie Vonk, Michiel Kraak.
• Benthic invertebrate bioturbation rates affect their sensitivity to contaminated sediments. Boris Prast. Supervision: Nienke Wieringa, Steven Droge, Michiel Kraak.
• The effect of the synergists PBO and DEM on the toxicity of thiacloprid to Folsomia candida. Astrid Ekelmans. Supervision: Ruben Bakker (VU), Dick Roelofs (VU), Michiel Kraak.
• The ecological effects of UV-B and heavy metal toxicity on the strategic adaptation of chironomids in the form of antioxidant capacity. Lennard IJpma. Supervision: Raúl Loayza Muro (Universidad Peruana Cayetano Heredia), Michiel Kraak.
• Accuracy evaluation of spectrophotometric probes – Application of chemometric tools to noise analysis. Nikoletta Tsiarta. Supervision: O. Gutierrez (Catalan Institute for Water Research), W. Gernjak (Catalan Institute for Water Research), Michiel Kraak.
• Shells, sediment and sonar: an attempt to use sonar bottom hardness measurements to map quagga mussel abundance and sediment charatcteristics. Bart Meijs. Supervision: Rob Kroes, Harm van der Geest, Michiel Kraak.
• Spatial heterogeneity drives phototrophic biofilm communities in Mediterranean temporary streams. Nina Witteveen. Supervision: Sergi Sabater (University of Girona), Michiel Kraak.
• Replacing one evil with another? Effects of biocides substituting the toxic antifouling compound tributyltin in tropical marine ecosystems (literature review). Angela Marulanda Gomez. Supervision: Michiel Kraak, Arie Vonk.
• Effects of anthropogenic barriers in freshwater systems on fish migration (literature study). Emma Knol. Supervision: Rob Kroes, Harm van der Geest, Michiel Kraak.
• Effects of land use specific contamination on aquatic ecosystem functioning. Eline Reus. Supervision: Milo de Baat, Arie Vonk, Michiel Kraak.
• Mechanisms of macrophyte palatability for a native and an exotic snail. Amit Bhikharie. Supervision: Bart Grutters (NIOO), Liesbeth Bakker (NIOO), Michiel Kraak.
• Link between chironomid adaptation to heavy metal pollution and their endosymbiotic bacterial colonies. Roelof Zwaan. Supervision: Hans Breeuwer, Michiel Kraak.
• A study into the LC-MS/MS analysis of GenX. Erik de Lange. Supervision: B.J.A. Berendsen (RIKILT), Steven Droge, Michiel Kraak.

Finished in 2018

• Toxicity of hydrogen peroxide to macro-invertebrates. Corné van Teulingen. Supervision: Erik Weenink, Petra Visser, Michiel Kraak.
• Hazard and risk of psychoactive drugs in aquatic ecosystems (literature study). Ymke Winkel. Supervision: Thomas ter Laak (KWR), Michiel Kraak.
• Belowground responses of aquatic plants to aboveground damage (literature study). Bryan Korbeeck. Supervision: Arie Vonk, Michiel Kraak.
• Primary Producers in Hazard and Risk Assessment (literature study). Loesjka van der Waal. Supervision: Arie Vonk, Michiel Kraak.
• Opportunities of stable isotopes to reveal impact of environmental stress on aquatic food web structure (literature study). Maarten Erich. Supervision: Gea van der Lee, Arie Vonk, Michiel Kraak. 
• Responses of benthic invertebrate communities to land use related stream sediment quality. Michelle Pena-Ortiz. Supervision: Paula Dos Reis Oliveira, Piet Verdonschot, Michiel Kraak.
• Ecological groundwater guidelines in the Water Framework Directive (literature study). Jesper Brugman. Supervision: Wilko Verweij (RIVM), Jacqueline Claessens (RIVM), Michiel Kraak.
• The effect of Marine Pollution on Phytoplankton: Out of sight, out of mind? (literature study). Emily White. Supervision: Steven Droge, Michiel Kraak.
• Impact of eutrophication on microbial decomposition in lowland streams. Holly Mellor. Supervision: Gea van der Lee, Arie Vonk, Michiel Kraak.
• Innovating ecotoxicological sediment quality assessment: bioassays incorporating chemical and biological fingerprints. Bart van Hall. Supervision: Nienke Wieringa, Steven Droge, Michiel Kraak.
• Using stable isotopes to reveal the impacts of eutrophication on aquatic food web structure. Jochem Baan. Supervision: Gea van der Lee, Arie Vonk, Michiel Kraak.
• A system analysis of temperate and tropical lakes; the influence of different climate conditions on the outcomes of the ecological model PClake (literature study). Margot Maathuis. Supervision: G. Kruitwagen (Witteveen + Bos),  S.A. Schep (Witteveen + Bos), Michiel Kraak.
• Exploring the boundaries of passive sampling and passive dosing  in sediment toxicity testing. Kelsey Walker. Supervision: Steven Droge, Nienke Wieringa, Milo de Baat, John Parsons, Michiel Kraak.

Finished in 2017

• Zooplankton response and resilience to the cyanocide hydrogen peroxide - a laboratory study on the sensitivity of multiple fresh water zooplankton species. Sam Aakster. Supervision: Erik Weenink, Petra Visser, Michiel Kraak.
• Aquatic ecotoxicity of licit and illicit drugs to Daphnia magna. Floris Maidman. Supervision: Stefan Kools (KWR), Pim de Voogt, Michiel Kraak.
• Ecotoxicological water quality assessment applying a battery of in situ and laboratory invertebrate bioassays. Bernd van Kuijk. Supervision: Milo de Baat, Michiel Kraak, Piet Verdonschot.
• Optimal broodstock conditioning and selection by simulated migration of European eel. Erwin Choy. Supervision: A.P. Palstra (WUR), Michiel Kraak.
• Comparative genomics of stress caused by endocrine disruptors in vertebrates and invertebrates (literature study). Elmar Becker. Supervision: Dick Roelofs (VU), Michiel Kraak.
• Using functional traits to understand the effect of environmental conditions on freshwater fish in a shallow temperate lake (Markermeer) (literature study). Clea van de Ven. Supervision: Rob Kroes, Harm van der Geest, Michiel Kraak.
• Innovating macrophyte based ecological water quality assessment focussing on sensitive submerged macrophytes (literature study). Dorian Bas. Supervision: Gea van der Lee, Gerard Oostermeijer, Michiel Kraak.
• Structure and functioning of shallow freshwater benthic ecosystems under eutrophic pressure. Jan-Thijs Pabon. Supervision: Gea van der Lee, Michiel Kraak, Piet Verdonschot.
• Hydrological, substance and ecosystem service analysis of the groote Molenbeek catchment. Joris Solleveld. Supervision: Piet Verdonschot, Michiel Kraak.
• The Current Status of the Dutch Stream restoration: An Evaluation of Stream Restoration on a Temporal and Spatial Scale (literature study). Jan-Thijs Pabon. Supervision: Judith Westveer, Paula Dos Reis, Michiel Kraak, Piet Verdonschot.
• The potential of spirit vinegar as an alternative sustainable herbicide (TESLA report). Jente Klok, Kelsey Walker, Mike van Zwieten. Supervision: Bertus Tulleners, Michel Haring, Michiel Kraak.
• Structure and function of shallow freshwater bodies under eutrophic pressure: relationships between algae, macrophytes and primary production. Bart Meijs. Supervision: Gea van der Lee, Michiel Kraak, Piet Verdonschot.
• Potential adverse environmental effects of natural vinegar applied as herbicide (literature study). Titus Rombouts. Supervision: Michel Haring (SILS), Michiel Kraak.
• Persistent Organic Pollutants (POPs) in bird feathers to identify diet composition and foraging locations (literature study). Rosanne Michielsen. Supervision: John Parsons, Michiel Kraak.
• Assessing aquatic herbicide toxicity in the Netherlands using algal bioassays and Effect Directed Analysis. Dorian Bas. Supervision: Milo de Baat, Michiel Kraak, Piet Verdonschot.
• Seagrass stoichiometry reviewed from an evolutionary perspective (literature study). Fee Smulders. Supervision: Arie Vonk, Harm van der Geest, Michiel Kraak.
• The respiratory strategies of macroinvertebrates: functional traits as indicators for oxygen availability in aquatic environments (literature study). Erwin Choy. Supervision: Tiedo van Kuijk, Michiel Kraak, Piet Verdonschot.
• Ecological traits of exotic macrophyte species in the Netherlands (literature study). Melanie Boonstra. Supervision: Piet Verdonschot, Michiel Kraak.
• Optimisation of effect-based trigger values for five classes of antibiotics (literature study). Floris Maidman. Supervision: Milo de Baat, Ron van der Oost (Waternet), Michiel Kraak.
• Plastic litter: a health risk for humans too? (literature study). Roxane Borruat. Supervision: Dick Vethaak (VU, Deltares), Michiel Kraak.

Finished in 2016

• The impact of agricultural land use on benthic invertebrate communities in restored low land streams. Sofia Naranjo. Supervision: Paula Dos Reis Oliveira, Michiel Kraak, Piet Verdonschot.
• Ecosystem characteristics in constructed delta lakes, a review (literature study). Stella Blok. Supervision: Arie Vonk, Michiel Kraak, Harm van der Geest.
• Restoring an urbanized stream: what factors determine the variation in vegetation cover and structure in the Red Butte Creek, Utah? Noortje Grijseels. Supervision: D.E. Pataki (University of Utah), Michiel Kraak, Arie Vonk.
• Impacts of human activity on foraging behavior of temperate seabirds (literature study). Bruce Sellmeijer. Supervision: Judy Shamoun-Baranes, Michiel Kraak.
• The toxicological effects of pollutants (PCBs, mercury, selenium, etc.) in the St. Lawrence Estuary(SLE) on marine mammals (literature study). Aleksandra Dragozet. Supervision: dr. C.W. Wittnich (University of Toronto), Michiel Kraak.
• Monitoring of Endocrine Disrupting Chemicals in the aquatic environment (literature study). Michiel Klaassen. Supervision: Marja Lamoree (VU), Timo Hamers (VU), Michiel Kraak.
• The biological significance of small air ions for living organisms (literature study). Seth van Heeringen. Supervision: Ellard Hunting (UL), Michiel Kraak.
• Origin identification of Trachurus trachurus by chemical analysis. Kim Duinmeijer. Supervision: Michiel Kotterman (IMARES), John Parsons, Michiel Kraak.
• Fate and toxicity of pharmaceuticals in the aquatic environment (literature study). Joost Mansour. Supervision: Pim de Voogt, Michiel Kraak.
• Comparing structural and functional parameters for water quality assessment (literature study). Mariska Beekman. Supervision: Michiel Kraak, Wim Admiraal.
• DNA barcoding of Chironomidae and Oligochaeta from qualitatively different ditches. Kim Duinmeijer. Supervision: Hans Breeuwer, Piet Verdonschot, Michiel Kraak.

Finished in 2015

• The effects of resource quality on consumption and food preference by benthic macrofauna. Karen Schilder. Supervision: Arie Vonk, Michiel Kraak.
• The influence of functional traits of benthic invertebrates on the fate and effects of sediment associated contaminants (literature study). Tom van der Meer. Supervision: Michiel Kraak, Piet Verdonschot.
• The effect of metals and altitude on the genetic poplation structure of the Aster Werneria nubigena. Elmer Swart. Spervision: Raul Loayza, Patrick Meirmans, Michiel Kraak.
• Detection and identification of environmentally relevant endocrine disrupting chemicals’ using miniaturized cellular bioassays. ShanLi Nio. Supervision: N. Zwart, M.H. Lamoree (VU), Michiel Kraak.
• Effects of climate change on the toxicity of metal polluted soils to multiple generations of Enchytraeus crypticus. Henrik Barmentlo. Supervision: M.N. Gonzalez Acaraz, C.A.M. van Gestel (VU), Michiel Kraak.
• UV-filters in personal care products: an evaluation of the risks for the environment and human safety (literature study). Tanja Bleyenberg. Supervision: Theo Traas (RIVM), Michiel Kraak.
• Relative sensitivity of molluscs to endocrine disrupting chemicals compared to daphnids. Kornelia Wartęga. Supervision: ZhiChao Dang, Theo Traas (RIVM), Michiel Kraak.
• Comparison of ecosystem services in two streams in the USA and China: The impact of climate change on water run off (literature study). Adjani Peralta. Supervision: Arie Vonk, Michiel Kraak.
• The use of bioplastic as a solution to petroleum-based plastic problems (literature study). Haico van Heuzen. Supervision: Myra van der Meulen, Dick Vethaak (Deltares), Michiel Kraak.
• Finding trigger values of antibiotics for a smart monitoring of aquatic ecosystems (literature study). Maria Suarez Munoz. Supervision: Ron van der Oost (Waternet), Michiel Kraak.
• UV-B radiation induced accumulation of dietary acquired photoprotective pigments in invertebrates in high altitude Andean streams. Guido Bonthond. Supervision: Raul Loayza, Michiel Kraak.
• Triggers of burrowing behaviour of crayfish: a lab study compared to a semi-field situation. Noortje Grijseels. Supervision: Ivo Roessink (Alterra), Harm van der Geest, Michiel Kraak.

• Water composition dependend toxicity of alkyl carboxylates. Anke Tukker. Supervision: Jort Hammer, Michiel Kraak.

Finished in 2014

• The effect of nutrients and toxic compounds on groundwater organisms in the Water Framework Directive. Brigitte Blonk. Supervision: Wilko Verweij (RIVM), Michiel Kraak.
• Smart Monitoring: Design of a WFD Monitoring Strategy for Chemical Pollution. Giulia Sileno. Supervision: Ron van der Oost (Waternet), Michiel Kraak.
• Sediment resuspension by benthic invertebrates influencing germination of macrophytes. Rob Oldenburg. Supervision: Maarten Ouboter (Waternet), Piet Verdonschot, Michiel Kraak.
• Toxiciy of neonicotinoid insecticides to different soil invertebrates. Nicola Brennan. Supervision: Kees van Gestel (VU), Michiel Kraak.
• Validation of Q-PCR assays for soil quality testing. Lydie Samuel. Supervision: Guangquan Chen, Dick Roelofs (VU), Michiel Kraak.
• Genetic structure of benthic macroinvertebrate populations in high altitude Andean streams. Milo de Baat. Supervision: Raul Loayza-Muro, Hans Breeuwer, Michiel Kraak.
• Understanding Fukushima: the effect of the 2011 nuclear disaster on marine ecosystems (literature study). Eline Postma. Supervision: Arie Vonk, Michiel Kraak.
• Biological and ecological traits of invasive decapods in the Netherlands (literature study). Tiedo van Kuijk. Supervision: Piet Verdonschot, Michiel Kraak.
• Combined effects of microplastics and absorbed contaminants on marine microalgal photosynthesis and growth. Paula Redondo Hasselerharm. Supervision: Sascha Sjollema, Michiel Kraak.
• A review of phthalates: The associated metabolic, reproductive, morphological and developmental toxicity towards fish (literature study). Emma Greenwell. Supervision: Liana Bastos Sales (VU),  Michiel Kraak.
• Ecosystem Services and the European Water Framework Directive. Narda van Leeuwen. Supervision: Wilko Verweij (RIVM), Michiel Kraak.

Finished in 2013

• Persistence, bioaccumulation and toxicity of Bisphenol A and its possible substitutes (literature study). Marian Schoorl. Supervision: John Parsons, Michiel Kraak.
• A hidden environmental threat; The effects of microplastics on marine food webs (literature study). Reinhoud de Blok. Supervision: Sascha Sjollema, Michiel Kraak.

Finished in 2012

• Persistence, bioaccumulation and toxicity of Triclosan and its metabolite Methyltriclosan. Gema Martinez. Supervision: Joop de Knecht, Theo Traas (RIVM), Susanne Waaijers, Michiel Kraak.
• Chronic Exposure of the Oligochaete Lumbriculus variegatus to Organophosphate Flame Retardants. Anouke de Jong. Supervision: Susanne Waaijers, Michiel Kraak.
• Effects of Dreissena polymorpha and Dreissena bugensis rostriformis on macrobenthic communities (literature study). Camillo Rosso. Supervison: Miguel Dionisio Pires (Deltares), Michiel Kraak.
• Adapting the taxonomic resolution of a Dutch ecological quality assessment method for the Water Framework Directive. Marieke Smit. Supervision: Wilko Verweij, Esther van der Grinten (RIVM), Michiel Kraak.

Finished in 2011

• Implementation of the Water Framework Directive (literature study). Mandy Velthuis. Supervision: Wilko Verweij (RIVM), Michiel Kraak.
• Effects of trait categorised herbivorous invertebrates on decomposition and microbial communities. Dre Kampfraath. Supervision: Ellard Hunting, Michiel Kraak.
• Pigments in mayflies as a defense mechanism against UV-B radiation and metal contamination. Alex Huiberse. Supervision: Raul Loayza-Muro, Michiel Kraak.
• Degradability of halogen-free flame retardants in aquatic systems. Carly Blair. Supervision: Susanne Waaijers, John Parsons, Michiel Kraak.
• Chronic exposure of the oligochaete Lumbriculus variegatus to organophosphate flame retardants: bioavailability and effects on reproduction. Blanca Ordonez Gomez. Supervision: Susanne Waaijers, John Parsosns, Michiel Kraak.
• Functional responses of decomposing food-webs to environmental pollution. Kristine Dorosko. Supervision: Ellard Hunting, Michiel Kraak.
• Oil in the ocean; a review of the origin, dimension and ecological effect of oil spills in the marine environment (literature study). Sarah Engelhard. Supervision: Michiel Kraak, John Parsons.
• Assessing ecological water quality with benthic macroinvertebrates and fish& analyzing pressures and impacts (IMPRESS) in a Mediterranean river basin (Essonas, Greece), following the EU Water Framework Directive. Eleni Bintoudi. Supervision: Maria Lazaridou (AUTh), Dimitra Bobori (AUTh), Michiel Kraak.
• The impact of persistent organic pollutants (POPs) on organisms in the southern Barents Sea. Jort Hammer. Supervision: Frederik de Laender (NIOO), Karline Soetaert (NIOO), Michiel Kraak.

Finished in 2010

• Ecotoxicity of alternative flameretardants. Marieke Soeter. Supervision: Susanne Waaijers, Michiel Kraak.
• Cadmium adaptation in the midge Chironomus riparius: effects on life cycle parameters. Maxine Bogaert. Supervision: Marino Marinkovic, Michiel Kraak.
• Benthic macroinvertebrate community composition in Andean high altitude streams. Michel Asselman. Supervision: Raul Loayza-Muro (UPCH, UvA), Hans Breeuwer, Michiel Kraak.
• Plastic: a Modern Gift with a dark side: facts, problems and solutions for plastics in the marine environment (literature study). Jort Hammer. Supervision: Michiel Kraak, John Parsons.
• Effects of metal pollution and high UVB radiation on community structure and photopigments of benthic macroinvertebrates in high altitude Andean streams. Camille Merritt. Supervision: Raul Loayza-Muro (UPCH, UvA), Michiel Kraak.
• Effects of climate change on water quality. Imke van Moorselaar. Supervision: Esther van der Grinten(RIVM), Michiel Kraak.
• Effects of climate change on water quality. Jiske van der Wiele. Supervision: Wilko Verweij (RIVM), Michiel Kraak.
• Toxicity of structural isomers of polycyclic aromatic compounds (literature study). Lluís Zurano. Supervision: John Parsons, Michiel Kraak.

Finished in 2009

• Linking invertebrate species identity, microbial functioning and dertitus processing. Bart de Vries. Supervision: Ellard Hunting, Michiel Kraak
• Alien freshwater species and their influence on the goals set by the Water Framework Directive. Myra van der Meulen. Supervision: Jose Vos (RIVM), Michiel Kraak.
• Ecological risk assessment of metal polluted lowland streams. Jiske van der Wiele. Supervision: Jaap Postma (Ecofide), Michiel Kraak.
• Chronic toxicant exposure as evolutionary force in the non-biting midge Chironomus. Michel Asselman. Supervision: Marino Marinkovic, Michiel Kraak.
• Invertebrate species diversity and detritus processing: An investigation into microbial metabolic responses. Merrin Whatley. Supervision: Ellard Hunting, Michiel Kraak.
• Imposex in marine gastropods: causes, consequences, and policy measures (literature study). Michel Asselman. Supervision: Dick Vethaak (Deltares), Michiel Kraak
• Population genetic aspects of metal adaptation in the midge Chironomus riparius. Marie Manguette. Superivion: Michiel Kraak, Marino Marinkovic, Hans Breeuwer.
• Assessing fish farm environmental impacts in the Mediterranean Sea (literature study). Vassia Vournazou. Supervision: Michiel Kraak, Harm van der Geest.
• What about freshwater invase species? (literature study). Wim Bouwman. Supervision: Michiel Kraak, Ellard Hunting (UvA/RIVM).

Finished in 2008

• Ecology, epidemiology, human health risk and economic impact of the aquatic parasites Dracunculus and Schistosoma (literature study). Myra van der Meulen. Supervion: D. Soonawala (LUMC), Michiel Kraak.
• Multigeneration exposure of the midge Chironomus riparius to the azaarene metabolite acridone.
  Vasia Vournazou. Supervision: Miriam Leon, Michiel Kraak.
• Floodplain restoration in the Danube catchment (literature study). Helena Hulsman. Supervision: Michiel Kraak, Helen Bergman.
• Genetic effects of toxicant induced bottlenecks (literature study). Coen Wagner. Supervision: Michiel Kraak, Hans Breeuwer.
• Multigeneration exposure of the midge Chironomus riparius to the azaarene metabolite acridone.
  Carlos Roderiguez. Supervision: Miriam Leon, Michiel Kraak.
• The impact of endocrine disrupting chemicals (EDCs) on fish and amphibian populations (literature study). Sander de Groot. Supervision: Dick Vethaak (RIKZ), Michiel Kraak
• Effects of habitat deterioration on the activity spaces and home ranges of the nursery bound juvenile lemon shark (Negaprion brevirostris) in the North Sound of Bimini, Bahamas.
  Judith Bakker. Supervision: S.H. Gruber (Bimini Biological Field Station, Bimini, Bahamas), Michiel Kraak
• Sea of trouble and possibilities for the Blacktip Shark( Carcharhinus limbatus)(literature study). Suzette Flantua. Supervision: Rafael Tavares (CIT, Venezuela), Michiel Kraak

Finished in 2007

• Chemical defense in biofilms (literature study).
  Ellard Hunting. Supervision: Wim Admiraal, Michiel Kraak.
• Estimating potential harmful effects of oil production in the Barents Sea (literature study).
  Eirik Steindal. Supervision: Michiel Kraak
• Glyphosate: Fears and facts of large-scale fumigations in Colombia (literature study).
  Carlos Roderiguez. Supervision: Michiel Kraak, Joost Duivenvoorden.
• Antibiotics in the Aquatic environment: direct and indirect effects (literature study).
  Jiery van Roon. Supervision: Dick de Zwart (RIVM), Michiel Kraak

Finished in 2006

• Effect of riparian land use on leaf litter breakdown and invertebrate community composition in tropical montane forest streams.
  Juan Calles. Supervision: Andrea Encalada (University of Coimbra), Michiel Kraak
• Effects of PACs on the emergence of the midge Chironomus riparius.
  Eef Borgman. Supervision: Miriam Leon Paumen, Michiel Kraak
• Effects of increased CO2 levels on the composition of phyto- and zooplankton.
  Mark van Dijk. Supervision: Anthony Verschoor (NIOO), Michiel Kraak

Finished in 2005

• Changes in the macrofauna communities in a lowland stream complex in the Netherlands, 1994-2004.
  Lidewij Servatius. Supervision: David Tempelman (AquaSense), Michiel Kraak
• Should I stay or should I go? Do Chironomus riparius larvae prefer food or do they avoid toxicants?
  Coen Wagner. Supervision: Elske de Haas, Michiel Kraak
• Which factors determine benthic invertebrate community composition?
  Inez Akkerman. Supervision: Elske de Haas, Michiel Kraak
• Winter browsing of willows leads to higher food quality for beavers in spring, but not in autumn.
  Annelies Veraart. Supervision: Bart Nolet (NIOO), Michiel Kraak
• Comparing the clearance rate of Dreissena polymorpha, Anodonta anatina and Daphnia galeata on mono- and mixed cultures of algae.
  Jacco Jong. Supervision: Babette Bontes (NIOO), Michiel Kraak
• Multi-generation effects of toxicants (literature study)
  Mark van Dijk. Supervision: Michiel Kraak

Finished in 2004

• Welke factoren bepalen de soortsamenstelling van de benthische levensgemeenschap in verontreinigd sediment?
  Rob van Haaren. Supervision: Elske de Haas, Michiel Kraak
• Validation and representativeness of the Biolog Method.
  Bram van Liere. Supervision: Marie-Elene Boivin (RIVM), Michiel Kraak
• De nadelige effecten van kleinschalige goudwinning op aquatische ecosystemen in Suriname.
  Inez Akkerman. Supervision: P. Ouboter (Anton de Kom Universiteit, Suriname), Michiel Kraak

Finished in 2003

• Influence of food level on chronic cadmium toxicity to Daphnia magna at low temperature.
  Lonneke Tokkie. Supervision: Evelyn Heugens, Michiel Kraak
• Forest carbon budgetrs compared: The significance of mangrove forests as carbon sink.
  Kim de Mutsert. Supervision: Robbert Twilley (University of Louisiana at Lafayette, USA), Michiel Kraak

Finished in 2002

• Life history experiments and development of sediment bioassays with benthic copepods.
  Marjanka Schaap. Supervision: Maria-Jose Caramujo, Elske de Haas, Michiel Kraak
• Transfer of heavy metals from biofilms to the freshwater snail Melanopsis sp.
  Tomas de Schutter. Supervision: Julia Toja (University of Sevilla), Michiel Kraak
• Metals and microsatellites in the midge Chironomus riparius.
  Bas Reuvers. Supervision: Hans Breeuwer, Michiel Kraak
• Density- and food dependent effects of fenvalerate on Daphnia magna populations.
  Barry Pieters. Supervision: Matthias Liess (UFZ, Duitsland), Michiel Kraak
• Combined effects of food and Cu in sediments on the midge Chironomus riparius.
  Miriam Leon Paumen. Supervision: Elske de Haas, Michiel Kraak
• Tributyltin: Regulations of TBT and other organotin compounds (literature study)
  Reanne Creyghton. Supervision: Michiel Kraak
• Trophic interactions in Great Lakes Coastal Wetlands: Zoobenthos biomass as an indicator for wetland quality.
  Kim de Mutsert. Supervision: Patricia Chow-Fraser (Mc Master University, Canada), Michiel Kraak
• Environmental impacts of coca production and eradication in Colombia. (literature study)
  Merel van der Mark. Supervision: Michiel Kraak
• Biodiversity in Lake Tupe, Rio Negro, Brasil
  Merel van der Mark. Supervision: Assad Darwich (INPA, Brasil), Michiel Kraak

Before 2002

no data available