Jeroen Everaars

Dr. Jeroen Everaars

Helmholtz Centre for Environmental Research - UFZ
Department of Community Ecology
AG Spatial Interaction Ecology (SIE)
German Center for Integrative Biodiversity Research (iDiv)
Deutscher Platz 5e, 04103 Leipzig

Research scientist

Landscape mosaic in Germany

Research and scientific interests

Current research

As an animal and plant ecologist, I am interested in species responses to human impacts on (agriculturally dominated) landscapes. I look at traits such as body size and food specialization, but I sometimes work with taxonomic groups as trait proxies as well.

Our current project aims to compare present flower visitors on selected plant species in the Alps with flower visitor data collected by Hermann Mueller from 1874-1879. Main questions include whether the same species can be found (or are lost) and how pollinator networks respond to losses (shifts in pollinator groups). Being responsible for the identification of most pollinator groups, I wonder why there are so many flies (mainly Syrphidae, Empididae , Muscidae and Anthomyiidae) visiting Alp flowers nowadays.


* Scaling laws in nature, allometry in insects
* Nature conservation
* Entomology (ecology and biodiversity of bees, flies, butterflies and beetles)
* Spatially explicit, individual based simulation models
* Invertebrate paleontology and evolutionary patterns


* Programming and statistical data analysis in R and C++
* Entomological methods (sampling, pinning)
* Insect identification (Syrphidae, Apidae, Coleoptera and others)
* Visual presentation and image editing


Current Projects

Past Projects


ISI-listed papers, book chapters and theses

2018 (1)

  • Everaars, J., Settele, J., Dormann, C.F., (2018):
    Fragmentation of nest and foraging habitat affects time budgets of solitary bees, their fitness and pollination services, depending on traits: Results from an individual-based model
    PLOS One 13 (2), e0188269
    full text (url)

2017 (2)

  • Hofmann, S., Everaars, J., Frenzel, M., Bannehr, L., Cord, A.F., (2017):
    Modelling patterns of pollinator species richness and diversity using satellite image texture
    PLOS One 12 (10), e0185591
    full text (url)
  • Ripple, W.J., Wolf, C., Newsome, T.M., Galetti, M., Alamgir, M., Crist, E., Mahmoud, M.I., Laurance, W.F., Auliya, M., Droste, N., Egli, L., Everaars, J., Ferreira, C., Friese, K., Henle, K., Kühn, I., Loyau, A., Pe'er, G., Priess, J.A., Schiller, J., Schmeller, D.S., Schröter, M., Spangenberg, J.H., Wiemers, M., and more, , (2017):
    World scientists’ warning to humanity: a second notice
    Bioscience 67 (12), 1026 - 1028
    full text (url)

2016 (1)

  • Frenzel, M., Everaars, J., Schweiger, O., (2016):
    Bird communities in agricultural landscapes: What are the current drivers of temporal trends?
    Ecol. Indic. 65 , 113 - 121
    full text (url)

2014 (2)

  • Everaars, J., Dormann, C.F., (2014):
    Simulation of solitary (non-Apis) bees competing for pollen
    In: Devillers, J., (ed.)
    In silico bees
    CRC Press, Boca Raton, FL, p. 209 - 268
    full text (url)
  • Everaars, J., Frank, K., Huth, A., (2014):
    Species ecology and the impacts of bioenergy crops: an assessment approach with four example farmland bird species
    GCB Bioenergy 6 (3), 252 - 264
    full text (url)

2012 (1)

  • Everaars, J., (2012):
    The response of solitary bees to landscape configuration with focus on body size and nest-site preference
    Dissertation, Martin-Luther-Universität Halle-Wittenberg
    PhD Dissertation 7/2012
    Helmholtz-Zentrum für Umweltforschung - UFZ, Leipzig, 146 pp.
    full text (pdf)

2011 (2)

  • Everaars, J., Strohbach, M.W., Gruber, B., Dormann, C.F., (2011):
    Microsite conditions dominate habitat selection of the red mason bee (Osmia bicornis, Hymenoptera: Megachilidae) in an urban environment: a case study from Leipzig, Germany
    Landsc. Urban Plan. 103 (1), 15 - 23
    full text (url)
  • Gruber, B., Eckel, K., Everaars, J., Dormann, C.F., (2011):
    On managing the red mason bee (Osmia bicornis) in apple orchards
    Apidologie 42 (5), 564 - 576
    full text (url)

2005 (1)

  • Master thesis on "Size-related co-existence of herbivores in a fractal landscape".

Lesure-time interests

* Nature Photography
* Digital image editing
* Advanced Origami
* Camping and Hiking

Curriculum Vitae

Since 2013 Research scientist, Helmholtz Centre for Environmental Research - UFZ, Department of Community Ecology, Germany. Quantifying the influence of land-use and weather on bee and bird communities. Pollinator changes in Alp communities.
2010-2013 Research scientist, Helmholtz Centre for Environmental Research - UFZ, Department of Ecological Modelling, Germany. Quantifying the impact of bioenergy crops on the abundance of farmland birds and development of mitigation strategies.
2006-2010 Research scientist, Helmholtz Centre for Environmental Research - UFZ, Department of Landscape Ecology, Germany. See Ph.D.
2006-2012 Ph.D., Department of Zoology, Martin-Luther-University Halle-Wittenberg, Germany, entitled "The response of solitary bees to landscape configuration with focus on body size and nest-site preference"
* Review of body size effects on foraging traits, affecting flight and pollen collection behaviour.
* Development and application of a spatially-explicit individual-based simulation model, in which individual solitary bees forage and compete for pollen. How does landscape structure affect different bees (differing in body size and nesting guild) and how does it affect pollination services?
* Field study on habitat selection by "urban bees". We used trap-nests in the city of Leipzig to investigate the distribution of Osmia bicornis in relation to land-use and local parameters.
2005-2006 Curator of the insect collection (Coleoptera), University of Amsterdam (UvA), The Netherlands
1998-2005 M.Sc., Biology with specialization in ecology, State University of Groningen (RUG), The Netherlands
* Research project in Theoretical Ecology. Development of a spatially explicit simulation model to test a theory about scaling laws (size relations) of herbivores.
* Research project in Ecuador in Tropical Entomology. Investigation of coleopteran diversity over an altitude gradient in a primary cloud forest.
* Essay: “Extinction vulnerability of insect orders in relation to their life history”.
* Specialization subjects: vegetation dynamics, conservation biology, alpine plant diversity, landscape ecology, dynamics of biodiversity, biostatistical analysis, geology, insect biology, insect-plant interactions, modelling, chaos theory, behaviour and ecology, genetics and evolution.