Koos Biesmeijer

Koos Biesmeijer

Koos Biesmeijer is head of the research group NL Biodiversity and Society in Naturalis and professor of Natural Capital at Leiden University. He co-operates with many scientific and societal partners to improve the Dutch landscape for pollinators and biodiversity in general. He is advisor on biodiversity at the province of Zuid Holland and vice-chair of the nature conservation organisation Natuurmonumenten.


Natural capital, ecosystem services, biodiversity change, conservation, social (bee) behaviour, bees and beekeeping

Prof. Dr. Koos Biesmeijer

Scientific director
Professor of Natural Capital
NL Biodiversity and Society

+31 (0)71 751 9259


I am an ecologist working on biodiversity change for 20 years with a focus on interactions between pollinators and plants. I was the first to documented large-scale linked pollinator and plants declines (Biesmeijer et al. 2006 in Science) and am leading research on sustainable crop pollination in the UK and Europe, am involved in research on drivers of pollinator change and urban pollinators as well as native honeybees, the impact of fragmentation on native pollinators and the impact of invasive plants on ecosystems.

After a PhD and Postdoc in tropical bee ecology at Utrecht University (Netherlands), I investigated honeybee ecology and communication at Cornell University (USA) and declines in European plants and pollinators at Leeds University. Currently, I am working at Naturalis Biodiversity Center where I lead a team studying functional biodiversity, ecosystem services and biodiversity change. My activities often involve international partners (EU, UK, India, Brazil, Kenya), organizations (FAO, Apimondia, IUCN), industry and research networks.

I believe that, as a scientist, one has the obligation to find ways to make knowledge useful for our society and to inform decision-makers about important issues. In my case, this is biodiversity. Even the restricted topic of pollinators and pollination touches upon many different sectors and societal stakeholders (e.g. agriculture, chemical industry food security, science, nature conservation, beekeeping, economy). Making a difference is, therefore, a real challenge.

Koos in the field
Tropical pollinators


A selection of the topics I am working on currently.

Groene cirkels

Green Circles

New way of working together with companies and local governments combined in one big network. Working together to achieve a circulair and sustainable economy.
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logo Dutch National Pollinator Initiative

National Bee Strategy

As Naturalis Biodiversity Center we are an advising partner of the Dutch National Pollinator Initiative which brings together all of the bee supporting initiatives. For more information see: National Bee Strategy.
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logo Nederland Zoemt

The Netherlands is buzzing

Citizen science project in which measures taken for bees and pollinators are promoted. Cooperation with different partners and different targetgroups in the Netherlands.
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Eucera longicornis

Flowering Arches

Makes information about bees and their food plants publicly available to improve and enrich wild bee research all over the world.
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Solar panels

Solar park diversity

Cooperation with Solar park Shell Moerdijk where we investigate how we can improve the park's insect-diversity by testing different seed mixtures sown under the solar panels.
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  • Biesmeijer, J. C., Roberts, S. P., Reemer, M., Ohlemüller, R., Edwards, M., Peeters, T., ... & Settele, J. (2006). Parallel declines in pollinators and insect-pollinated plants in Britain and the Netherlands. Science313(5785), 351-354.
  • Potts, S. G., Biesmeijer, J. C., Kremen, C., Neumann, P., Schweiger, O., & Kunin, W. E. (2010). Global pollinator declines: trends, impacts and drivers. Trends in ecology & evolution25(6), 345-353.
  • Dauber, J., Biesmeijer, J. C., Gabriel, D., Kunin, W. E., Lamborn, E., Meyer, B., ... & Settele, J. (2010). Effects of patch size and density on flower visitation and seed set of wild plants: a pan‐European approach. Journal of Ecology98(1), 188-196.
  • Potts, S. G., Ngo, H. T., Biesmeijer, J. C., Breeze, T. D., Dicks, L. V., Garibaldi, L. A., ... & Vanbergen, A. (2016). The assessment report of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services on pollinators, pollination and food production.
  • González-Varo, J. P., Biesmeijer, J. C., Bommarco, R., Potts, S. G., Schweiger, O., Smith, H. G., ... & Vilà, M. (2013). Combined effects of global change pressures on animal-mediated pollination. Trends in ecology & evolution28(9), 524-530.


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Bombus ruderarius