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Institute for Biodiversity and Ecosystem Dynamics Institute for Biodiversity and Ecosystem Dynamics

Dr. H.G. (Harm) van der Geest

Assistant Professor of Benthic Ecology
Faculty of Science
Institute for Biodiversity and Ecosystem Dynamics
Photographer: onbekend
Visiting address
  • Science Park 904
  • Room number: C4.225
Postal address
  • Postbus 94240
    1090 GE Amsterdam
Contact details
Social media
  • Benthic Ecology Lab

    Benthic ecology Lab

    Welcome! Together with Dr. J.A. (Arie) Vonk I run the Benthic Ecology Lab, doing research at the interface of water and sediment.
    This lab is part of the department of Aquatic Environmental Ecology (AEE) of the Institute of Biodiversity and Ecosystem Dynamics (IBED). The AEE department is headed by Prof. dr. W.P. (Pim) de Voogt (chair in Environmental Chemistry) and  Prof. dr. P.F.M ( Piet) Verdonschot (special chair Wetland Restoration Ecology). 

    The activities of the Benthic ecology lab are embedded in the Amsterdam Water Science (UvA VU) and the Centre for Wetland Ecology.

    Research interests

    [text]

    Department of Aquatic Environmental Ecology
    Institute for Biodiversity and Ecosystem Dynamics
    Amsterdam Water Science
    Centre for Wetland Ecology

    Benthic ecology Lab

    • Dr. H.G. (Harm) van der Geest (Assistent prof. Benthic Ecology)
    • Dr. J.A. (Arie) Vonk
    Harm van der Geest and Arie Vonk taking gravity core samples of sediments in the middle of Lake Markermeer

    The benthic ecology lab works in close collaboration with other staff members of the department of Aquatic Environmental Ecology

    • Prof. dr. W.P. (Pim) de Voogt (chair Environmental Chemistry)
    • Prof. dr. P.F.M. (Piet) Verdonschot (special chair Wetland Restoration Ecology)
    • Dr. M.H.S. (Michiel) Kraak (Associate prof. Chemical Stress Ecology)
    • Dr. ir. J.M. (Jasper) de Goeij (Sponge ecology)

    Current PhD projects Benthic ecology lab

    • Ciska Overbeek: initial stages of peat formation (part of PEATCAP project)
      Promotor: Prof. dr. W. Admiraal; co-promotor: Dr. H.G. van der Geest
    • Judith Westveer: drivers for succesfull recovery of lowland streams
      Promotor: Prof. dr. P.F.M. Verdonschot; co-promotor: Dr. H.G. van der Geest
    • Paula dos Reis Oliveira: Effects of runoff in on stream communities in patchy landscapes
      Promotor: Prof. dr. P.F.M. Verdonschot; co-promotores: Dr. M.H.S. Kraak, Dr. H.G. van der Geest
    • Brittany Alexander: SPonge cell physiology and ecological functioning of reef communities
      Promotor: Prof. dr. W. Admiraal; co-promotores: Dr. ir. J.M. de Goeij, Dr. H.G. van der Geest)
    • Michel Vorenhout: Soil and sediment redox profiles in dynamic environments
      (external)

    Current MSc and BSc projects

    • Fabienne Doveren (sponge physiology)
    • Seth van Heeringen (food quality for invertebrates)
    • Arne Klink (macroinvertebrates in newly constructed systems)
    • Brigitte Blonk (effectsw of climate change on feeding behavior of snails)
    • Erwin Choy (effects of macrophytes on nutrient exchange)
    • Raphaell Zimmerman (invase seegrass species)
    • Jan Thijs Pabon (effects of macrophytes on nutrient exchange)
    • Melanie Boonstra (macrophyte diversity of agricultural ditches)
    • Thijs Bohm (eel culturing)
    • Fee Smulders (invasive seegrass species)
    • Mirthe Wiltink (nutrient dynamics in seegrass beds)
    • Tom van de Meer (bioturbation in seegrass beds)
    • Stella Blok (ecological changes in constructed delta lakes)

    Finished PhD projects

    • Sascha Sjollema. Anthropogenic and natural chemical stressors modulating the development of primary production in the coastal zone. Together with: Harm van der Geest, Wim Admiraal (uvA), Remi Laane (Deltares, UvA), Dick Vethaak (Deltares, VU-IVM). UvA, Deltares and VU-IVM 2010-2014.
    • Merrin Whatley. Drivers of spatial distribution and biodiversity in benthic macro-invertebrate communities of Noord-Holland. Together with: Alejandra Goldenberg, Harm van der Geest, Wim Admiraal (UvA), Gert van Ee (HHNK), Ron van Leuken (Waterproef), Herman van Dam (Waternatuur, Waterproef). UvA, Stichting Waterproef and HHNK 2010-2014.
    • Alejandra Goldenberg. Drivers of spatial distribution and biodiversity in benthic algal communities of Noord-Holland. Together with: Merrin Whatley, Harm van der Geest, Wim Admiraal (UvA), Gert van Ee (HHNK), Ron van Leuken (Waterproef), Herman van Dam (Waternatuur, Waterproef). UvA, Stichting Waterproef and HHNK 2010-2014.
    • Bram Mulling. Conversion of particles and pathogens in biological filtrationof treated municipal wastewaters. Together with: Harm van der Geest, Wim Admiraal (UvA), Ruud Kampf, Joost Kappelhof (Waternet), Rob van den Boomen (Witteveen&Bos, STOWA). UvA, STOWA and Waternet 2009-2013.
    • Ellen Weerman. Spatial patterns in phototrophic biofilms: the role of physical and biological interactions. Together with: Peter Herman (RUN, NIOO-CEME), Johan van de Koppel (NIOO-CEME), Wim admiraal, Harm van der Geest (UvA)
    Online repository of PhD theses of the Aquatic Environmental Ecology group

    Facilities for benthic research

    The Benthic ecology lab makes use of the excellent facilities available at the Institute for Biodiversity and Ecosystem Dynamics. These facilities include start-of-the-art equipment for physical, chemical and molecular analyses.

    In addition, dedicated facilities are available for field studies and lab experiments. 

    [text Benthatron]

    Benthic ecology Lab

    Welcome! Together with Dr. J.A. (Arie) Vonk I run the Benthic Ecology Lab, doing research at the interface of water and sediment.
    This lab is part of the department of Aquatic Environmental Ecology (AEE) of the Institute of Biodiversity and Ecosystem Dynamics (IBED). The AEE department is headed by Prof. dr. W.P. (Pim) de Voogt (chair in Environmental Chemistry) and  Prof. dr. P.F.M ( Piet) Verdonschot (special chair Wetland Restoration Ecology). 

    The activities of the Benthic ecology lab are embedded in the Amsterdam Water Science (UvA VU) and the Centre for Wetland Ecology.

    Research interests

    [text]

    Benthic ecology Lab

    • Dr. H.G. (Harm) van der Geest (Assistent prof. Benthic Ecology)
    • Dr. J.A. (Arie) Vonk

    The benthic ecology lab works in close collaboration with other staff members of the department of Aquatic Environmental Ecology

    • Prof. dr. W.P. (Pim) de Voogt (chair Environmental Chemistry)
    • Prof. dr. P.F.M. (Piet) Verdonschot (special chair Wetland Restoration Ecology)
    • Dr. M.H.S. (Michiel) Kraak (Associate prof. Chemical Stress Ecology)
    • Dr. ir. J.M. (Jasper) de Goeij (Sponge ecology)

    Current PhD projects Benthic ecology lab

    • Ciska Overbeek: initial stages of peat formation (part of PEATCAP project)
      Promotor: Prof. dr. W. Admiraal; co-promotor: Dr. H.G. van der Geest
    • Judith Westveer: drivers for succesfull recovery of lowland streams
      Promotor: Prof. dr. P.F.M. Verdonschot; co-promotor: Dr. H.G. van der Geest
    • Paula dos Reis Oliveira: Effects of runoff in on stream communities in patchy landscapes
      Promotor: Prof. dr. P.F.M. Verdonschot; co-promotores: Dr. M.H.S. Kraak, Dr. H.G. van der Geest
    • Brittany Alexander: SPonge cell physiology and ecological functioning of reef communities
      Promotor: Prof. dr. W. Admiraal; co-promotores: Dr. ir. J.M. de Goeij, Dr. H.G. van der Geest)
    • Michel Vorenhout: Soil and sediment redox profiles in dynamic environments
      (external)

    Current MSc and BSc projects

    • Fabienne Doveren (sponge physiology)
    • Seth van Heeringen (food quality for invertebrates)
    • Arne Klink (macroinvertebrates in newly constructed systems)
    • Brigitte Blonk (effectsw of climate change on feeding behavior of snails)
    • Erwin Choy (effects of macrophytes on nutrient exchange)
    • Raphaell Zimmerman (invase seegrass species)
    • Jan Thijs Pabon (effects of macrophytes on nutrient exchange)
    • Melanie Boonstra (macrophyte diversity of agricultural ditches)
    • Thijs Bohm (eel culturing)
    • Fee Smulders (invasive seegrass species)
    • Mirthe Wiltink (nutrient dynamics in seegrass beds)
    • Tom van de Meer (bioturbation in seegrass beds)
    • Stella Blok (ecological changes in constructed delta lakes)

    Finished PhD projects

    • Sascha Sjollema. Anthropogenic and natural chemical stressors modulating the development of primary production in the coastal zone. Together with: Harm van der Geest, Wim Admiraal (uvA), Remi Laane (Deltares, UvA), Dick Vethaak (Deltares, VU-IVM). UvA, Deltares and VU-IVM 2010-2014.
    • Merrin Whatley. Drivers of spatial distribution and biodiversity in benthic macro-invertebrate communities of Noord-Holland. Together with: Alejandra Goldenberg, Harm van der Geest, Wim Admiraal (UvA), Gert van Ee (HHNK), Ron van Leuken (Waterproef), Herman van Dam (Waternatuur, Waterproef). UvA, Stichting Waterproef and HHNK 2010-2014.
    • Alejandra Goldenberg. Drivers of spatial distribution and biodiversity in benthic algal communities of Noord-Holland. Together with: Merrin Whatley, Harm van der Geest, Wim Admiraal (UvA), Gert van Ee (HHNK), Ron van Leuken (Waterproef), Herman van Dam (Waternatuur, Waterproef). UvA, Stichting Waterproef and HHNK 2010-2014.
    • Bram Mulling. Conversion of particles and pathogens in biological filtrationof treated municipal wastewaters. Together with: Harm van der Geest, Wim Admiraal (UvA), Ruud Kampf, Joost Kappelhof (Waternet), Rob van den Boomen (Witteveen&Bos, STOWA). UvA, STOWA and Waternet 2009-2013.
    • Ellen Weerman. Spatial patterns in phototrophic biofilms: the role of physical and biological interactions. Together with: Peter Herman (RUN, NIOO-CEME), Johan van de Koppel (NIOO-CEME), Wim admiraal, Harm van der Geest (UvA)

    Facilities for benthic research

    The Benthic ecology lab makes use of the excellent facilities available at the Institute for Biodiversity and Ecosystem Dynamics. These facilities include start-of-the-art equipment for physical, chemical and molecular analyses.

    In addition, dedicated facilities are available for field studies and lab experiments. 

    [text Benthatron]

  • About me

    [under construction]

  • Teaching

    Bachelor Biologie

    [text]

    Bachelor Future Planet Studies

    [text]

    Master Biological Sciences

    [text]

    Minor TESLA track

    [text]

    Student projects

    [text]

    Other teaching and outreach activities

    [text]

  • Publications

    2024

    2023

    • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M., & van der Geest, H. G. (2023). Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. BMC ecology and evolution, 23(1), Article 57. https://doi.org/10.1186/s12862-023-02161-7
      • Related datasets
        • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M. & van der Geest, H. G. (2023). Additional file 3 of Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. Figshare. https://doi.org/10.6084/m9.figshare.24202735.v1
        • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M. & van der Geest, H. G. (2023). Additional file 2 of Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. Figshare. https://doi.org/10.6084/m9.figshare.24202732.v1

    2021

    2020

    2019

    2018

    2017

    • Vonk, J. A., Rombouts, T., Schoorl, J. C., Serne, P., Westerveld, J. W., Cornelissen, P., & van der Geest, H. G. (2017). Impact of water drawdown and rewetting on sediment nutrient-dynamics in a constructed delta-lake system (Oostvaardersplassen, The Netherlands): A mesocosm study. Ecological Engineering, 108, Part B, 396-405. https://doi.org/10.1016/j.ecoleng.2017.06.017 [details]

    2016

    • The QUINTESSENCE Consortium, Bohan, D. A., Landuyt, D., Ma, A., Macfadyen, S., Martinet, V., Massol, F., McInerny, G., Montoya, J. M., Mulder, C., Pascual, U., Pocock, M. J. O., White, P., Blanchemanche, S., Bonkowski, M., Bretagnolle, V., Brönmark, C., Dicks, L., Dumbrell, A., ... Vonk, J. A. (2016). Networking Our Way to Better Ecosystem Service Provision. Trends in Ecology and Evolution, 31(2), 105-115. Advance online publication. https://doi.org/10.1016/j.tree.2015.12.003 [details]
    • Vermaat, J. E., Harmsen, J., Hellmann, F. A., van der Geest, H. G., de Klein, J. J. M., Kosten, S., Smolders, A. J. P., Verhoeven, J. T. A., Mes, R. G., & Ouboter, M. (2016). Annual sulfate budgets for Dutch lowland peat polders: The soil is a major sulfate source through peat and pyrite oxidation. Journal of Hydrology, 533, 515-522. https://doi.org/10.1016/j.jhydrol.2015.12.038 [details]

    2015

    2014

    • Alexander, B. E., Liebrand, K., Osinga, R., van der Geest, H. G., Admiraal, W., Cleutjens, J. P. M., Schutte, B., Verheyen, F., Ribes, M., van Loon, E., & de Goeij, J. M. (2014). Cell turnover and detritus production in marine sponges from tropical and temperate benthic ecosystems. PLoS ONE, 9(10), e109486. Advance online publication. https://doi.org/10.1371/journal.pone.0109486 [details]
    • Dorgelo, J., van der Geest, H. G., & Hunting, E. R. (2014). Dynamics of natural populations of the dertitivorous mudsnail Potamopyrgus antipodarum (gray) (Hydrobiidae) in two interconnected lakes differing in trophic state. SpringerPlus, 3, 736. https://doi.org/10.1186/2193-1801-3-736 [details]
    • Goldenberg Vilar, A., van Dam, H., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2014). Typology of diatom communities in the Dutch delta: recognizing patterns of environmental drivers in nutrient rich ditches. Ecological Indicators, 45, 561-569. https://doi.org/10.1016/j.ecolind.2014.05.016 [details]
    • Goldenberg Vilar, A., van Dam, H., van Loon, E. E., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2014). Eutrophication decreases distance decay of similarity in diatom communities. Freshwater Biology, 59(7), 1522-1531. https://doi.org/10.1111/fwb.12363 [details]
    • Mulling, B. T. M., Soeter, A. M., van der Geest, H. G., & Admiraal, W. (2014). Changes in the planktonic microbial community during residence in a surface flow constructed wetland used for tertiary wastewater treatment. Science of the Total Environment, 466-467, 881-887. https://doi.org/10.1016/j.scitotenv.2013.07.103 [details]
    • Sjollema, S. B., MartínezGarcía, G., van der Geest, H. G., Kraak, M. H. S., Booij, P., Vethaak, A. D., & Admiraal, W. (2014). Hazard and risk of herbicides for marine microalgae. Environmental Pollution, 187, 106-111. https://doi.org/10.1016/j.envpol.2013.12.019 [details]
    • Sjollema, S. B., Vavourakis, C. D., van der Geest, H. G., Vethaak, A. D., & Admiraal, W. (2014). Seasonal variability in irradiance affects herbicide toxicity to the marine flagellate Dunaliella tertiolecta. Frontiers in Marine Science, 1, Article 13. https://doi.org/10.3389/fmars.2014.00013 [details]
    • Sjollema, S. B., van Beusekom, S. A. M., van der Geest, H. G., Booij, P., de Zwart, D., Vethaak, A. D., & Admiraal, W. (2014). Laboratory algal bioassays using PAM fluorometry: effects of test conditions on the determination of herbicide and field sample toxicity. Environmental Toxicology and Chemistry, 33(5), 1017-1022. https://doi.org/10.1002/etc.2537 [details]
    • Whatley, M. H., van Loon, E. E., Cerli, C., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2014). Linkages between benthic microbial and feshwater insect communities in degraded peatland ditches. Ecological Indicators, 46, 415-425. https://doi.org/10.1016/j.ecolind.2014.06.031 [details]
    • Whatley, M. H., van Loon, E. E., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2014). The role of emergent vegetation in structuring aquatic insect communities in peatland drainage ditches. Aquatic Ecology, 48, 267-283. https://doi.org/10.1007/s10452-014-9482-3 [details]
    • Whatley, M. H., van Loon, E., van Dam, H., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2014). Macrophyte loss drives decadal change in benthic invertebrates in peatland drainage ditches. Freshwater Biology, 59(1), 114-126. https://doi.org/10.1111/fwb.12252 [details]

    2013

    • Hunting, E. R., Franken, O., Knopperts, F., Kraak, M. H. S., Vargas, R., Rölling, W. F. M., & van der Geest, H. G. (2013). Substrate as driver of sponge distributions in mangrove ecosystems. Marine Ecology - Progress Series, 486, 133-141. https://doi.org/10.3354/meps10376 [details]
    • Hunting, E. R., Ubels, S. M., Kraak, M. H. S., & van der Geest, H. G. (2013). Root-derived organic matter confines sponge community composition in mangrove ecosystems. Ecological Processes, 2013(2), 14. https://doi.org/10.1186/2192-1709-2-14 [details]
    • Hunting, E. R., White, C. M., van Gemert, M., Mes, D., Stam, E., van der Geest, H. G., Kraak, M. H. S., & Admiraal, W. (2013). UV radiation and organic matter composition shape bacterial functional diversity in sediments. Frontiers in Microbiology, 4, 317. https://doi.org/10.3389/fmicb.2013.00317 [details]
    • Mulling, B. T. M., van den Boomen, R. M., Claassen, T. H. L., van der Geest, H. G., Kappelhof, J. W. N. M., & Admiraal, W. (2013). Physical and biological changes of suspended particles in a free surface flow constructed wetland. Ecological Engineering, 60, 10-18. https://doi.org/10.1016/j.ecoleng.2013.07.017 [details]
    • Mulling, B. T. M., van den Boomen, R. M., van der Geest, H. G., Kappelhof, J. W. N. M., & Admiraal, W. (2013). Suspended particle and pathogen peak discharge buffering by a surface-flow constructed wetland. Water Research, 47(3), 1091-1100. Advance online publication. https://doi.org/10.1016/j.watres.2012.11.032 [details]
    • Vermaat, J. E., Harmsen, J., Hellmann, F. A., Van Der Geest, H. G., De Klein, J., Kosten, S., Smolders, A. J. P., Verhoeven, J., Mes, R. G., & Ouboter, M. (2013). Sulfaatbronnen in het Hollandse veenlandschap. Landschap, 30(1), 5-13. [details]

    2012

    • Hunting, E. R., Whatley, M. H., van der Geest, H. G., Mulder, C., Kraak, M. H. S., Breure, A. M., & Admiraal, W. (2012). Invertebrate footprints on detritus processing, bacterial community structure, and spatiotemporal redox profiles. Freshwater Science, 31(3), 724-732. https://doi.org/10.1899/11-134.1 [details]
    • Nguyen, L. T. H., Vandegehuchte, M. B., van der Geest, H. G., & Janssen, C. R. (2012). Evaluation of the mayfly Ephoron virgo for European sediment toxicity assessment. Journal of Soils and Sediments, 12(5), 749-757. https://doi.org/10.1007/s11368-012-0488-y [details]

    2011

    • Duester, L., van der Geest, H. G., Moelleken, S., Hirner, A. V., & Kueppers, K. (2011). Comparative phytotoxicity of methylated and inorganic arsenic- and antimony species to Lemna minor, Wolffia arrhiza and Selenastrum capricornutum. Microchemical Journal, 97(1), 30-37. https://doi.org/10.1016/j.microc.2010.05.007 [details]
    • Hunting, E. R., & van der Geest, H. G. (2011). Predictability of bacterial activity and denitrification in aquatic sediments with continuous measurements of redox potential. International Journal of Environmental Science and Technology, 8(3), 553-560. https://doi.org/10.1007/BF03326241 [details]
    • Vorenhout, M., van der Geest, H. G., & Hunting, E. R. (2011). An improved datalogger and novel probes for continuous redox measurements in wetlands. International Journal of Environmental Analytical Chemistry, 91(7/8), 801-810. https://doi.org/10.1080/03067319.2010.535123 [details]
    • Weerman, E. J., van der Geest, H. G., van der Meulen, M. D., Manders, E. M. M., van de Koppel, J., Herman, P. M. J., & Admiraal, W. (2011). Ciliates as engineers of phototrophic biofilms. Freshwater Biology, 56(7), 1358-1369. https://doi.org/10.1111/j.1365-2427.2011.02574.x [details]

    2010

    • Hunting, E. R., de Goeij, J. M., Asselman, M., van Soest, R. W. M., & van der Geest, H. G. (2010). Degradation of mangrove-derived organic matter in mangrove associated sponges. Bulletin of Marine Science, 86(4), 871-877. https://doi.org/10.5343/bms.2010.1001 [details]
    • Hunting, E. R., de Goeij, J. M., van Soest, R. W. M., & van der Geest, H. G. (2010). Implications of mangrove-derived DOM for sponge community dynamics. In Euro ISRS symposium 2010: Reefs in a changing environment. 13-17 December, Wageningen.
    • Hunting, E. R., van der Geest, H. G., Krieg, A. J., van Mierlo, M. B. L., & van Soest, R. W. M. (2010). Mangrove-sponge associations: a possible role for tannins. Aquatic Ecology, 44(4), 679-684. https://doi.org/10.1007/s10452-009-9306-z [details]
    • Serra, A., Guasch, H., Admiraal, W., van der Geest, H. G., & van Beusekom, S. A. M. (2010). Influence of phosphorus on copper sensitivity of fluvial periphyton: the role of chemical, physiological and community-related factors. Ecotoxicology, 19(4), 770-780. https://doi.org/10.1007/s10646-009-0454-7 [details]

    2009

    2008

    2020

    2019

    2013

    • Sjollema, S. B., Booij, P., van der Geest, H. G., Laane, R. W. P. M., Leonards, P. E. G., Lamoree, M. H., ... Vethaak, A. D. (2013). Living in contaminated coastal waters.Toxic effects of contaminants on marine phytoplankton. Paper presented at 7th International Conference on Marine Pollution and Ecotoxicology, Hong Kong, June 2013., .

    2012

    • Mulling, B. T. M., Soeter, A. M., van der Geest, H. G., & Admiraal, W. (2012). Changes in planktonic bacterial community composition in constructed wetlands. Paper presented at 9th INTECOL international Wetlands conference. http://www.conference.ifas.ufl.edu/intecol/presentations/054/0220%20B%20Mulling.pdf
    • Whatley, M. H., van Dam, H., van der Geest, H. G., & Admiraal, W. (2012). Particle sedimentation drives benthic invertebrate community composition in degraded peatland waters. Paper presented at Society for Wetland Scientists Conference, .
    • Whatley, M. H., van Loon, E. E., van Dam, H., Vonk, J. A., van der Geest, H. G., & Admiraal, W. (2012). Vegetation governs aquatic invertebrate composition in agricultural peatlands. Paper presented at New Zealand Freshwater Sciences Society Conference.

    2011

    • Booij, P., Sjollema, S., Lamoree, M. H., Leonards, P. E. G., de Voogt, P., van der Geest, H. G., Admiraal, W., Laane, R. W. P. M., & Vethaak, A. D. (2011). Toxic pressure on algae: extraction tools for identification of contaminants in marine waters. Paper presented at Setac Europe 21st Annual Meeting, .
    • Sjollema, S. B., Booij, P., van der Geest, H. G., Laane, R. W. P. M., Leonards, P. E. G., Lamoree, M. H., ... Vethaak, A. D. (2011). Combined effect of anthropogenic contaminants and natural algal toxins on primary producers in the Dutch coastal waters. Paper presented at International Symposium on the Ecology of the Wadden Sea, Texel, The Netherlands, .
    • Sjollema, S. B., Booij, P., van der Geest, H., Laane, R., Leonards, P., Lamoree, M., Admiraal, W., Vethaak, D., & de Voogt, P. (2011). Toxicity of coastal waters: use of a quick algal bioassay. 160. Abstract from SETAC Europe 21nd Annual Meeting Milan. http://c.ymcdn.com/sites/www.setac.org/resource/resmgr/Abstract_Books/SE-abstract-book-2011.pdf?hhSearchTerms=%22Sjollema%22 [details]

    Talk / presentation

    • Dos Reis Oliveira, P. C. (speaker), Verdonschot, P. F. M. (speaker), Kraak, M. H. S. (speaker) & van der Geest, H. G. (speaker) (6-6-2017). Land-use effects on lowland stream ecosystems, Society for Freshwater Science Annual Meeting, Raleigh, North Carolina.
    • Dos Reis Oliveira, P. C. (speaker), Verdonschot, P. F. M. (speaker), Kraak, M. H. S. (speaker), Verdonschot, R. C. M. (speaker) & van der Geest, H. G. (speaker) (14-2-2017). Sand addition as a restoration technique in lowland streams, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands 2017.

    2023

    • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M. & van der Geest, H. G. (2023). Additional file 3 of Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. Figshare. https://doi.org/10.6084/m9.figshare.24202735.v1
    • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M. & van der Geest, H. G. (2023). Additional file 1 of Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. Figshare. https://doi.org/10.6084/m9.figshare.24202729.v1
    • Kroes, R., Winkel, Y., Breeuwer, J. A. J., van Loon, E. E., Loader, S. P., Maclaine, J. S., Verdonschot, P. F. M. & van der Geest, H. G. (2023). Additional file 2 of Phylogenetic analysis of museum specimens of houting Coregonus oxyrinchus shows the need for a revision of its extinct status. Figshare. https://doi.org/10.6084/m9.figshare.24202732.v1

    2019

    • Vonk, J. A., Noordhuis, R., van der Geest, H. G. & Bijkerk, R. (2019). Verrijkte dataset taxonomische samenstelling van de microalgengemeenschap in het IJsselmeer en Markermeer 1994-2015.. Zenodo. https://doi.org/10.5281/zenodo.3473250
    • Overbeek, C., Harpenslager, S. F., van Zuidam, J. P., van Loon, E., Lamers, L. P. M., Soons, M. B., Admiraal, W., Verhoeven, J. T. A., Smolders, A. J. P., Roelofs, J. G. M. & van der Geest, H. (2019). ESM Chapter 2 - Drivers of vegetation development, biomass production and the initiation of peat formation in a newly constructed wetland. Zenodo. https://doi.org/10.5281/zenodo.3252883

    2018

    • Overbeek, C., van der Geest, H., van Loon, E. . & Admiraal, W. (2018). Online Resources Chapter 3 - Decomposition of standing litter biomass in newly constructed wetlands associated with direct effects of sediment and water characteristics and the composition and activity of the decomposer community using Phragmites australis as a single standard substrate. Zenodo. https://doi.org/10.5281/zenodo.3252887
    • Overbeek, C., van Heeringen, S., van Loon, E. ., Admiraal, W. & van der Geest, H. (2018). Supplementary Material Chapter 4 - Decomposition of aquatic pioneer vegetation in newly constructed wetlands. Zenodo. https://doi.org/10.5281/zenodo.3252889
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