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Dr. J.A. (Jacques) Deere

Faculty of Science
Institute for Biodiversity and Ecosystem Dynamics

Visiting address
  • Science Park 904
Postal address
  • Postbus 94240
    1090 GE Amsterdam
Contact details
  • Research

    My research focuses on understanding how life-history responds to environmental change and how this impacts population dynamics and eco-evolutionary dynamics, I do so by combining experimental work and modelling approaches. My current research focuses on (1) predator-prey dynamics in biological control and (2) changes in population dynamics through dispersal and variable environments.


    1. Predator-prey dynamics in biological control

    Biological control of pests using natural enemies is becoming increasingly used in pest control. In addition to the applied component, predator-prey dynamics in biological control can contribute to theory on the dynamics of coupled predator prey systems. Applied contributions to biological control are often focused on the national level, however benefits of biological control at the national level can potentially be beneficial internationally, as many pest species are invasive and occur worldwide (e.g. Western flower thrips (Frankliniella occidentalis)). To this end identifying suitable natural enemies to control pest species not only provides insight to test and extend current theory on predator-prey systems but opens a much-needed applied component which can be drafted into policy. Currently I, in collaboration with Dr. Arne Janssen and Dr. Paul van Rijn, am investigating the role of alternative food in biological control of dry bulb mites and Western flower thrips. Alternative food in a predator-prey system ensures populations of predators are maintained in the absence of prey. A key aspect of the role of alternative food in biological control that is currently lacking is the quality and frequency of application. Using data from several laboratory and greenhouse experiments we construct detailed population-dynamical models which incorporate an alternative food supply. Outcomes can be directly applied to biological control methods but can also contribute theoretically to coupled predator-prey systems.


    2. Changes in population dynamics through dispersal and variable environments

    Individual and population level effects of dispersal

    One of my model systems is the bulb mite ( Rhizoglyphus robini) and the theoretical framework that I use is a form of discrete structured-time modelling (Integral Projection Models, deterministic and stochastic). In population models, dispersal is often considered as a population-level process, however the focus has shifted from the population level to the level of individual organisms. As its the behaviour and demographic changes of individuals that shape the dynamics of populations, to fully understand the effects of dispersal on natural systems it is necessary to incorporate individual level differences in dispersal behaviour in population models. In collaboration with Dr. Isabel Smallegange, the aim is to determine the influence of dispersal propensity on population size and structure, life histories and how these change with stochastic environments. I am also collaborating with Dr. Gregory Roth to develop a model that incorporates the costs of dispersal life-histories, emigration effects and immigration effects on natal populations.

    Mechanisms of eco-evolutionary dynamics

    Given that the feedbacks between ecology and contemporary evolution are now common place, there is a need to understand what the influence of these feedbacks are at various levels of biological understanding, as well as how the feedbacks are influenced by changing environments. I focus on the individual and population level in an attempt to understand how various life-history traits may be affected and how they in turn may affect eco-evolutionary feedback – this requires a mechanistic understanding. To do so I, in collaboration with Dr. Isabel Smallegange, investigate how individuals with different life-histories influence population dynamics and structure and how these population changes in turn affect selection pressures, and ultimately trait change, within the population.

    Impact of calorie restriction (CR) on longevity and other life-history traits

    CR theory predicts prolonged life expectancy due to restricted food intake. However, there is some controversy over the benefits of CR. Furthermore, interaction effects are not well established, with most CR research largely neglecting interaction effects. In collaboration with Dr. Roberto Salguero-Gómez, I investigate, experimentally, the impacts of several interacting factors (food quality and timing) in addition to CR on longevity in long-lived planarian species, Schmidtea mediterranea and Dugesia tahitiensis. From the data generated by the experiments we aim to construct population models in an effort to understand the impacts of CR and interaction effects on the population dynamics of the two species.

  • Publications



    • Brunner, F. S., Deere, J. A., Egas, M., Eizaguirre, C., & Raeymaekers, J. A. M. (2019). The diversity of eco-evolutionary dynamics: comparing the feedbacks between ecology and evolution across scales. Functional Ecology, 33(1), 7-12. [details]






    • Terblanche, J. S., Clusella-Trullas, S., Deere, J. A., van Vuuren, B. J., & Chown, S. L. (2009). Directional evolution of the slope of the metabolic rate-temperature relationship is correlated with climate. Physiological and Biochemical Zoology, 82(5), 495-503.


    • Jumbam, K. R., Terblanche, J. S., Deere, J. A., Somers, M. J., & Chown, S. L. (2008). Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders: Myro kerguelenensis and Prinerigone vagans. Polar Biology, 31, 215-220.
    • Terblanche, J. S., Clusella-Trullas, S., Deere, J. A., & Chown, S. L. (2008). Thermal tolerance in a south-east African population of the tsetse fly Glossina pallidipes (Diptera, Glossinidae): Implications for forecasting climate change impacts. Journal of Insect Physiology, 54(1), 114-127.


    • Terblanche, J. S., Deere, J. A., Clusella-Trullas, S., Janion, C., & Chown, S. L. (2007). Critical thermal limits depend on methodological context. Proceedings of the Royal Society B-Biological Sciences, 274, 2935-2942.


    • Deere, J. A., & Chown, S. L. (2006). Testing the beneficial acclimation hypothesis and its alternatives for locomotor performance. American Naturalist, 168, 630-644.
    • Deere, J. A., Sinclair, B. J., Marshall, D. J., & Chown, S. L. (2006). Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island. Journal of Insect Physiology, 52, 693-700.
    This list of publications is extracted from the UvA-Current Research Information System. Questions? Ask the library or the Pure staff of your faculty / institute. Log in to Pure to edit your publications. Log in to Personal Page Publication Selection tool to manage the visibility of your publications on this list.
  • Ancillary activities
    No known ancillary activities