Dr. Kristin Scharnweber

Foto von Dr. Kristin Scharnweber


Campus Golm
University of Potsdam
Plant Ecology and Nature Conservation
Am Mühlenberg 3, building 60, room 3.11
14476 Potsdam

Current employment

Since March 2021: Scientific coordinator of the DFG-funded Research Training Group (RTG) BioMove for 'Integrating Biodiversity Research with Movement Ecology in dynamic agricultural landscapes' 


2019                     Evolutionary Biology Centre, Department of Ecology and Genetics; Limnology, Uppsala
                               University, Sweden
Docent in Biology with specialization in Limnology (Swedish equivalent to German Habilitation)

2014-2020          Evolutionary Biology Centre, Department of Ecology and Genetics; Limnology,  Uppsala University, Sweden   
                               Postdoctoral researcher

2010-2013          Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology
                               and Inland Fisheries (IGB), Berlin, Germany

                               PhD within the TERRALAC-project: The effects of structural complexity on ecological and evolutionary processes in shallow lake                                                   ecosystems.

2006-2010          Department of Biology, University of Potsdam, Germany
Advanced studies of Biological Sciences with focus on Animal Ecology, Evolution, Limnology and 
                                External diploma thesis at Texas A&M University, College Station, Texas, USA: Trophic niche 
                                segregation between sexual and asexual species of the genus Poecilia

2004-2006          Department of Biology,University of Hamburg, Germany
Basic studies of Biological Sciences. Intermediate diploma.

Research interests

  • aquatic ecosystem ecology
  • aquatic-terrestrial linkages
  • food web ecology
  • evolutionary ecology
  • animal mediation of carbon cycling
  • population divergence of consumers
  • predator induced morphological defenses.


DFG Research Training Group BioMove


  • Scharnweber, K., Chaguaceda, F., Eklöv, P. Fatty acid accumulation in feeding types of a natural freshwater fish population. Accepted in Oecologia.
  • Chaguaceda, F., Scharnweber, K., Dalman, E., Tranvik, L. & Eklöv, P. Short-term apparent mutualism drives responses of aquatic prey to increasing productivity. Accepted in Journal of Animal Ecology.
  • Grasset, C., Sobek, S., Scharnweber, K., Moras, S., Villwock, H., Andersson, S., Hiller, C., Chaguaceda, F., Colom, W. & Tranvik, L. 2020. Non-linear response of the CO2-equivalent balance of freshwater ecosystems to productivity. Global Change Biology 26 (10): 5705-5715.
  • Scharnweber, K., Gårdmark, A. 2020. Feeding specialists on fatty acid rich prey have higher gonad weights: pay-off in Baltic perch? Ecosphere 11(8):e03234. 10.1002/ecs2.3234.
  • Scharnweber, K. 2020. Morphological and trophic divergence of lake and stream minnows (Phoxinus phoxinus). Ecology and Evolution 10 (15): 8358-8367.
  • Chaguaceda, F., Eklöv, P. & Scharnweber, K. 2020. Regulation of fatty acid composition related to ontogenetic changes and niche differentiation of a common aquatic consumer. Oecologia 193: 325-336.
  • Scharnweber, K., Chaguaceda, F., Dahlman, E., L. J. Tranvik & Eklöv, P. 2020. The emergence of fatty acids – Aquatic insects as vectors along a productivity gradient. Freshwater Biology. 65 (3): 565-578.
  • Marklund M. H. K., Svanbäck, R., Faulks, L., Breed, M., Scharnweber, K., Zha, Y. & Eklöv, P. 2019. Asymmetrical habitat coupling of an aquatic predator – the importance of individual specialisation. Ecology and Evolution 9 (6): 3405-3415.
  • Nydahl, A. C., Wallin, M. B., Tranvik, L. J., Hiller, C., Attermeyer, K., Garrison, J., Chaguaceda, F., Scharnweber, K. & Weyhenmeyer, G. A. 2019. Colored organic matter increases CO2 in meso-eutrophic lake water through altered light climate and acidity. Limnology & Oceanography 64 (2): 744-756.
  • Mehner, T., Lischke, B., Scharnweber, K., Attermeyer, K., Brothers, S., Gaedke, U., Hilt, S. & Brucet, S. 2018. Empirical correspondence between trophic transfer efficiency in freshwater food webs and the slope of their size spectra. Ecology 99 (6): 1463-1472.
  • Marklund, M. H. K., Svanbäck, R., Zha, Y., Scharnweber, K. & Eklöv, P. 2018. The influence of habitat accessibility on the dietary and morphological specialization of an aquatic predator. Oikos 127 (1): 160-169.
  • Lischke, B., Mehner, T., Hilt, S., Attermeyer, K., Brauns, M., Brothers, S., Grossart, H. P., Köhler, J. Scharnweber, K. & Gaedke, U. 2017. Benthic carbon is inefficiently transferred in the food webs of two eutrophic shallow lakes. Freshwater Biology 62(10): 1693-1706.
  • Scharnweber, K., Strandberg, U., Karlsson, K. & Eklöv, P. 2016. Decrease of Population Divergence in Eurasian Perch (Perca fluviatilis) in Browning Waters: Role of Fatty Acids and Foraging Efficiency. PLOSone 11(9): e0162470. doi:10.1371/journal.pone.0162470.
  • Scharnweber, K., Strandberg, U. Marklund, M. H. K. & Eklöv, P. 2016. Combining resource use assessment techniques reveal trade-offs in trophic specialization of perch. Ecosphere 7(8): e01387. 10.1002/ecs2.1387.
  • Syväranta, J., Scharnweber, K., Brauns, M. Hilt, S. & Mehner, T. 2016. Assessing the utility of hydrogen, carbon and nitrogen stable isotopes in estimating consumer allochthony in two shallow eutrophic lakes. PLOSone 11(5): e0155562. doi:10.1371/journal.pone.0155562.
  • Mikolajewski, D., Scharnweber, K., Jiang, B., Leicht, S., Mauersberger, R. Johansson, F. & Rolff, J. 2016. Changing the habitat: the evolution of inter-correlated traits to escape from predators. Journal of Evolutionary Biology 29: 1394-1405.
  • Mehner, T., Attermeyer, K., Brauns, M., Brothers, S., Diekmann, J., Gaedke, U., Grossart, H.-P., Köhler, J., Lischke, B., Meyer, N., Scharnweber, K., Syväranta, J., Vanni M. J. & Hilt, S. 2016. Weak response of animal allochthony and production to enhanced supply of terrestrial leaf litter in nutrient-rich lakes. Ecosystems 19: 311-325.
  • Lischke, B., Weithoff, G., Wickham, S. A., Attermeyer, K., Grossart, H.-P., Scharnweber, K., Hilt, S. & Gaedke, U. 2016. Large biomass of small feeders: Ciliates may dominate herbivory in eutrophic lakes. Journal of Plankton Research 38 (1): 2-15.
  • Tobler, M., Scharnweber, K., Greenway, R., Passow, C., Arias-Rodriguez, L., & García-De-León, F. 2015. Convergent changes in the trophic ecology of extremophile fish occurring along replicated environmental gradients. Freshwater Biology 60(4): 768-780.
  • Hilt, S., Wanke, T., Scharnweber, K., Brauns, M., Syväranta, J., Brothers, S., Gaedke, U., Köhler, J., Lischke, B. & Mehner T. 2015. Contrasting response of two shallow eutrophic lakes to a partial winterkill of fish. Hydrobiologia 749(1): 31-42.
  • Scharnweber, K., Vanni, M.J., Hilt, S., Diekmann, J., & Mehner, T. 2014. Boomerang ecosystem subsidies: Organic carbon inputs from land to lakes are returned to terrestrial food webs via aquatic insects. Oikos 123: 1439-1448.
  • Brothers, S., Köhler, J., Attermeyer, K., Grossart, H-P., Mehner, T., Meyer, N., Scharnweber. K & Hilt, S. 2014. A feedback loop links brownification and anoxia in a temperate, shallow lake. Limnology and Oceanography 59(4): 1388-1398.
  • Scharnweber, K., Syväranta, J., Hilt, S., Brauns, M., Vanni, M.J., Brothers, S., Köhler, J., Knežević-Jarić, J. & Mehner, T. 2014. Whole-lake experiments reveal the fate of terrestrial particulate organic carbon in benthic food webs of shallow lakes. Ecology 95 (6): 1496-1505.
  • Brothers, S., Hilt, S., Attermeyer, K., Grossart, H-P., Kosten, S., Lischke, B., Mehner, T., Meyer, N., Scharnweber, K. & Köhler, J. 2013. A regime shift from macrophyte to phytoplankton dominance enhances carbon burial in a shallow, eutrophic lake. Ecosphere 4:11 DOI: 10.1890/ES13-00247.1.
  • Scharnweber, K., Watanabe, K., Syväranta, J., Wanke, T., Monaghan, M.T. & Mehner, T. 2013. Effects of predation pressure and resource use on morphological divergence in omnivorous prey fish. BMC Evolutionary Biology 13:132, DOI: 10.1186/1471-2148-13-132.
  • Scharnweber, K., Plath, M. & Tobler, M. 2011. Trophic niche segregation between the sexes in two species of livebearing fishes (Poeciliidae). Bulletin of Fish Biology 13:11-20.
  • Scharnweber, K., Plath, M., Winemiller, K.O. & Tobler, M. 2011. Dietary niche overlap in sympatric asexual and sexual livebearing fishes (Poecilia spp.). Journal of Fish Biology 79:1760-1773.
  • Scharnweber, K., Plath, M. & Tobler, M. 2011. Examination of boldness traits in sexual and asexual mollies (Poecilia latipinna, P. formosa). Acta Ethologica 14:77-83.
  • Scharnweber, K., Plath, M. & Tobler, M. 2011. Feeding efficiency and food competition in coexisting sexual and asexual livebearing fishes of the genus Poecilia. Environmental Biology of Fishes 90:197-205.
  • Riesch, R., Duwe, V., Herrmann, N., Padur, L., Ramm, A., Scharnweber, K., Schulte, M., Schulz-Mirbach, T., Ziege, M. & Plath, M. 2009. Variation along the shy-bold continuum in extremophile fishes (Poecilia mexicana, Poecilia sulphuraria). Behavioural Ecology and Sociobiology 63:1515-1526.
  • Ziege, M., Padur, L., Duwe, V., Ramm, A., Scharnweber, K., Riesch, R. & Plath, M. 2008. Audience effect alters mate choice in male Heterophallus milleri (Poeciliidae). Bulletin of Fish Biology 10:87-92.