After PhD studies on sex differentiation and growth patterns of the European eel, I did my post doc in a project on “Size-based tools for managing freshwater fish communities” during 1997-2001. Since 2001, I have been responsible for standard fish sampling in lakes, and to a lesser extent in streams, within national environmental monitoring programs.
My research interest is on how lake fish communities and populations depend on and interact with their abiotic and biotic environment. I use field monitoring data to answer basic and applied questions about fish responses to natural and anthropogenic stressors and management actions, e.g. acidification and liming. Applications include to develop, inter-calibrate, and refine, fish-based methods for assessment of ecological status according to the European Water Framework Directive.
I often work on behalf of the Swedish Agency for Marine and Water Management, at the national level as well as in collaboration with researchers from other European countries.
I am one among many teachers at the SLU Masters course "BI1269 Ecology for Fish Management and Conservation, 15 credits"
Publikationer i urval
Holmgren, K., E. Degerman, E. Petersson & B. Bergquist. 2016. Long term trends of fish after liming of Swedish streams and lakes. Atmospheric Environment 146: 245-251, doi: 10.1016/j.atmosenv.2016.08.033.
Sandström, A., P. Philipsson, A. Asp, T. Axenrot, A. Kinnerbäck, H. Ragnarsson-Stabo & K. Holmgren. 2016. Assessing the potential of remote sensing derived water quality data to explain variations in fish assemblages and to support status assessments in large lakes. Hydrobiologia 780: 71-84, doi: 10.1007/s10750-016-2784-9.
Holmgren, K. 2016. Monitoring and ecological status assessment of fish assemblages in inland waters. Deliverable 4.5-1. WATERS report no. 2016:6. Havsmiljöinstitutet, Sweden.
Mehner, T., C. Keeling, M. Emmrich, K. Holmgren, C. Argillier, P. Volta, I.J. Winfield & S. Brucet. 2016. Effects of fish predation on density and size spectra of prey fish communities in lakes. Canadian Journal of Fisheries and Aquatic Sciences 73: 506-518, doi: 10.1139/cjfas-2015-0034.
Arranz, I., T. Mehner, L. Benejam, C. Argillier, K. Holmgren, E. Jeppesen, T.L. Lauridsen, P. Volta, I.J. Winfield & S. Brucet. 2016. Density-dependent effects as key drivers of intraspecific size structure of six abundant fish species in lakes across Europe. Canadian Journal of Fisheries and Aquatic Sciences 73: 519-534, doi: 10.1139/cjfas-2014-0508.
Holmgren, K. 2014. Challenges in assessing biological recovery from acidification in Swedish lakes. Ambio 43: 19-29. DOI: 10.1007/s13280-014-0559-y.
Emmrich, M., S. Pedron, S. Brucet, I.J. Winfield, E. Jeppesen, P. Volta, C. Argillier, T.L. Lauridsen, K. Holmgren, T. Hesthagen & T. Mehner. 2014. Geographical patterns in the body-size structure of European lake fish communities along abiotic and biotic gradients. Journal of Biogeography 41: 2221-2233, doi:10.1111/jbi.12366.
Brucet, S., S. Pédron, T. L. Lauridsen, T. Mehner, C. Argillier, I. J. Winfield, P. Volta, M. Emmrich, T. Hesthagen, K. Holmgren, L. Benejam, F. Kelly, T. Krause, A. Palm, M. Rask & E. Jeppesen. 2013. Fish diversity in European lakes: geographic predictors dominate over anthropogenic pressures. Freshwater Biology 58:1779-1793. Doi:10.1111/fwb.12167.
Argillier, C., S. Caussé, M. Gevrey, S. Pédron, J. De Bortoli, S. Brucet, M. Emmrich, E. Jeppesen, T. Lauridsen, T. Mehner, M. Olin, M. Rask, P. Volta, I.J. Winfield, F. Kelly, T. Krause, A. Palm & K. Holmgren. 2013. Development of a fish-based index to assess the eutrophication status of European lakes. Hydrobiologia 174: 193-211. DOI 10.1007/s10750-012-1282-y.
Emmrich, M., I.J. Winfield, J. Guillard, A. Rustadbakken, C. Verges, P. Volta, E. Jeppesen, T.L. Lauridsen, S. Brucet, K. Holmgren, C. Argillier & T. Mehner. 2012. Strong correspondence between gillnet catch per unit effort and hydroacoustically derived fish biomass in stratified lakes. Freshwater Biology 57: 2436-2448. doi:10.1111/fwb.12022.
Jeppesen, E., T. Mehner, I.J. Winfield, K. Kangur, J. Sarvala, D. Gerdeaux, M. Rask, H.J. Malmquist, K. Holmgren, P. Volta, S. Romo, R. Eckmann, A. Sandström, S. Blanco, A. Kangur, H. Ragnarsson-Stabo, M. Tarvainen, A.-M. Ventelä, M. Søndergaard, T.L. Lauridsen & M. Meerhoff. 2012. Impacts of climate warming on the long-term dynamics of key fish species in 24 European lakes. Hydrobiologia 694: 1-39. DOI 10.1007/s10750-012-1182-1.
Tolonen, K.T., K.P. Brodersen, T.A. Kleisborg, K. Holmgren, M. Dahlberg, L. Hamerlik & H. Hämäläinen. 2012. Phantom midge-based models for inferring past fish abundance. Journal of Paleolimnology 47: 531-547. DOI 10.1007/s10933-012-9579-4.
Jeppesen, E., M. Meerhoff, K. Holmgren, I. Gonzalez-Bergonzoni, F. Teixeira-de Mello, S. Declerk, L. DeMeester, M. Søndergaard, T.L. Lauridsen, R. Bjerring, J.M. Conde-Porcuna, N. Mazzeo, C. Iglesias, M. Reizenstein, H. Malmquist, Z. Liu, D. Balayla & X. Lazzaro. 2010. Impacts of global warming on fish community structure and dynamics, and potential ecosystem effects. Hydrobiologia 646: 73-90. DOI 10.1007/s10750-010-0171-5.