Dr. Nielsen (I presume) group

Breaking news!

The NEOPOLL project, funded by the Research Council of Norway, is moving. Julie Sørlie Paus-Knudsen has been hired as a PhD student and started December 1th 2017. In addition we have taken on two master students (Pawel Jan Kolano and Malin Aarønes) to work on the project.


My main research interest is how environmental perturbations affect ecosystems and the species and interactions that comprise them. My current focus is on how neonicotinoid pestecides and climate change affect pollinator behaviour and plant-pollinator interactions. In the group we look at how these pesticides affect both bumblebee behaviour and colony development in teh lab, but also in more natural settings. 

I also work with crop pollination in Africa (Tanzania and Kenya) and I'm involved in a project looking at pollinators and pollination in relation to an Oil palm plantation in West Kalimantan, Indonesia. On a more local scale I am involved in a project looking at plant-pollinator interactions and seed set in relation to climate change at Finse, in the Norwegian Mountains and a project looking at pollinators throughout the city of Oslo.             

Master projects

Interested in doing a master project in pollination ecology?

Master students

Several master students have been or are currently doing their projects in the Dr. Nielsen (I presume) group.

Group members

Julie Sørlie Paus-Knudsen (PhD student)

Portrait of Dr. Trond Reitan.
Dr. Trond Reitan
(Number cruncher)

Relevant litterature

Rader, R. A., I. B. Bartomeus, L. A. Garibaldi, M. P. D. Garratt, B. G. Howlett, R. G. Winfree, S. A. Cunningham, M. M. Mayfield, A. D. Arthur, G. K. S. Andersson, R. M. Bommarco, C. N. Brittain, L. G. Carvalheiro, N. P. Chacoff, M. H. Entling, B. A. Foully, B. M. Freitas, B. u. Gemmill-Herren, J. V. Ghazoul, S. R. Griffin, C. L. Gross, L. Herbertsson, F. Herzog, J. Hipolito, S. Jaggar, F. Jauker, A.-M. Klein, D. Kleijn, S. Krishnan, C. Q. Lemos, S. A. M. Lindstroem, Y. Mandelik, V. M. Monteiro, W. Nelson, L. Nilsson, D. E. Pattemore, N. d. Pereira, G. Pisanty, S. G. Potts, M. Reemerf, M. Rundloef, C. S. Sheffield, J. Scheper, C. Schueepp, H. G. Smith, D. A. Stanley, J. C. Stout, H. Szentgyoergyi, H. Taki, C. H. Vergara, B. F. Viana, and M. Woyciechowski. 2016. Non-bee insects are important contributors to global crop pollination. Proceedings of the National Academy of Sciences of the United States of America 113

Stanley, D. A., M. P. Garratt, J. B. Wickens, V. J. Wickens, S. G. Potts, and N. E. Raine. 2015. Neonicotinoid pesticide exposure impairs crop pollination services provided by bumblebees. Nature 528

Stanley, D. A., and N. E. Raine. 2016. Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants. Functional Ecology 30

Saez, A., C. L. Morales, L. Y. Ramos, and M. A. Aizen. 2014. Extremely frequent bee visits increase pollen deposition but reduce drupelet set in raspberry. Journal of Applied Ecology 51:1603-1612.

Williams, I. H. 1994. The dependence of crop production within the European Union on pollination by honey bees. Pages 229-257 in K. Evans, editor. Agricultural Zoology Reviews.

Rasmont P, Franzén M, Lecocq T, Harpke A, Roberts S, Biesmeijer J, Castro L, Cederberg B, Dvorak L, Fitzpatrick Ú, Gonseth Y, Haubruge E, Mahé G, Manino A, Michez D, Neumayer J, Ødegaard F, Paukkunen J, Pawlikowski T, Potts S, Reemer M, Settele J, Straka J, Schweiger O (2015) Climatic Risk and Distribution Atlas of European Bumblebees. BioRisk 10: 1-236. doi: 10.3897/biorisk.10.4749

Melathopoulosa A. P., G. C. Cutlerb, P. Tyedmersa. 2015. Where is the value in valuing pollination ecosystem services to agriculture? Ecological Economics 109:59-70.

Hanley, N., T. D. Breeze, C. Ellis, D. Goulson. 2015. Measuring the economic value of pollination services: Principles, evidence and knowledge gaps. Ecosystem Services 14:124-132.

Schulp, C.J.E., S. Lautenbach, P.H. Verburg. 2014. Quantifying and mapping ecosystem services: Demand and supply of pollination in the European Union. Ecological Indicators 36:131-141.

Button L., E Elle. 2014. Wild bumble bees reduce pollination deficits in a crop mostly visited by managed honey bees. Agriculture, Ecosystems & Environment 197:255-263.

Scheper, J., M. Reemer, R. van Kats, W. A. Ozinga, G. T. J. van der Linden, J. H. J. Schaminée, H. Siepel, and D. Kleijn. 2014. Museum specimens reveal loss of pollen host plants as key factor driving wild bee decline in The Netherlands. Proceedings of the National Academy of Sciences 111:17552-17557.

Nielsen, A., and Ø. Totland. 2014. Structural properties of mutualistic networks withstand habitat degradation while species functional roles might change. Oikos 123:323-333.

Massdöd av bin -samhällsekonomiska konsekvenser och möyliga åtgärder. Jordbruksverket. Rapport 2009:24 (In Swedish)

Bartomeus, I., M. G. Park, J. Gibbs, B. N. Danforth, A. N. Lakso, and R. Winfree. 2013. Biodiversity ensures plant–pollinator phenological synchrony against climate change. Ecology Letters 16(11): 1331-1338.

Benadi, G., T. Hovestadt, H.-J. Poethke, and N. Blüthgen. 2013. Specialization and phenological synchrony of plant-pollinator interactions along an altitudinal gradient. Journal of Animal Ecology:DOI: 10.1111/1365-2656.12158

Christmann, S., and A. A. Aw-Hassan. 2012. Farming with alternative pollinators (FAP)-An overlooked win-win-strategy for climate change adaptation. Agriculture Ecosystems & Environment 161:161-164.

Gilman, R. T., N. S. Fabina, K. C. Abbott, and N. E. Rafferty. 2012. Evolution of plant–pollinator mutualisms in response to climate change. Evolutionary Applications 5:2-16.

Hegland, S. J., A. Nielsen, A. Lázaro, A.-L. Bjerknes, and Ø. Totland. 2009. How does climate warming affect plant-pollinator interactions? Ecology Letters 12:184-195.

Iler, A. M., D. W. Inouye, T. T. Høye, A. J. Miller-Rushing, L. A. Burkle, and E. B. Johnston. 2013. Maintenance of temporal synchrony between syrphid flies and floral resources despite differential phenological responses to climate. Global Change Biology 19: 2348–2359.

Kearns, C. A., D. W. Inouye, and N. M. Waser. 1998. Endangered mutualisms: The conservation of plant-pollinator interactions. Annual Review of Ecology and Systematics 29:83-112.

Kjøhl, M., A. Nielsen, and N. C. Stenseth. 2011. Potential effects of climate change on crop pollination. FAO, Rome.

Kremen, C., N. M. Williams, and R. W. Thorp. 2002. Crop pollination from native bees at risk from agricultural intensification. Proceedings of the National Academy of Sciences of the United States of America 99:16812-16816.

Leonhardt, S. D., N. Gallai, L. A. Garibaldi, M. Kuhlmann, and A. M. Klein. 2013. Economic gain, stability of pollination and bee diversity decrease from southern to northern Europe. Basic and Applied Ecology 14:461-471.

Rader, R., J. Reilly, I. Bartomeus, and R. Winfree. 2013. Native bees buffer the negative impact of climate warming on honey bee pollination of watermelon crops. Global Change Biology 19(10):3103–3110.

Ricketts, T. H. 2004. Tropical forest fragments enhance pollinator activity in nearby coffee crops. Conservation Biology 18:1262-1271.

Winfree, R., N. M. Williams, J. Dushoff, and C. Kremen. 2007. Native bees provide insurance against ongoing honey bee losses. Ecology Letters 10:1105-1113.