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Staff photo Pär Byström

Pär Byström

I study size-dependent interactions within and between fish species and effects of fishing and climate change on population dynamics and ecological processes.

Works at

KB. H4, Linneus väg 6, Umeå, A4.42.15 Umeå universitet, 901 87 Umeå

My general research focus on size dependent predatory and competitive interactions within and between fish species and how these, together with abiotic factors, affect the size structure, density, production and dynamics of fish populations and fish communities. More specifically, present main research approaches focus on how fish populations, fish communities and ecosystems are affected by climate change and fisheries. The climate change research integrates studies of abiotic factors and its impact on biotic processes, focusing on identifying mechanisms and thresholds of climate change effects on fish production and ecosystem productivity. Key aspects of this research are how temperature, light availability and concentrations of terrestrial organic carbon affect productivity, resource use and energy pathways in aquatic food webs, from algae and bacteria at the base of the food web, through intermediate consumers (zooplankton and macroinvertebrates) to top consumers like fish.

The research on the effects of fishing focuses on how different types of fisheries and fishing mortality, size-dependent interactions between fish individuals and the variation in productivity between different habitats(and resources)affect the densities and size structure of fish populations. Another part of this research study the potential use of estimated concentrations of species-specific fish DNA in water samples as measures of fish abundance. The purpose of this research is to identify sustainable harvest regimes and to developed long-term monitoring methods and management strategies of lake fish top consumer populations.

Systems studied are mainly the Bothnian bay and Bothnian sea and boreal and arctic lakes and streams. The research includes comparative field studies along different climate gradients and experimental studies at different temporal and spatial scales from aquaria, to experimental pond ecosystems and whole lake experiments. Fish species mainly studied are three- and nine-spined sticklebacks, perch, brown trout and Arctic char.


Research area

Freshwater ecology

Research projects

Climate change induced regime shifts in Northern lake ecosystems

Monitoring and management of Arctic lakes in a changing climate

Estimating fish abundance in lakes via molecular methods based on environmental DNA (eDNA

Environmental Evidence, BioMed Central 2019, Vol. 8, (1)
Macura, Biljana; Byström, Pär; Airoldi, Laura; et al.
ICES Journal of Marine Science, Oxford University Press 2019, Vol. 76, (6) : 1653-1665
Olsson, Jens; Jakubaviciute, Egle; Kaljuste, Olavi; et al.
Global Change Biology, John Wiley & Sons 2019, Vol. 25 : 504-521
Vasconcelos, Francisco Rivera; Diehl, Sebastian; Rodríguez, Patricia; et al.
Hydrobiologia, Vol. 805, (1) : 131-146
Degerman, Rickard; Lefébure, Robert; Byström, Pär; et al.
Scientific Reports, Nature Publishing Group 2018, Vol. 8
Hamdan, Mohammed; Byström, Pär; Hotchkiss, Erin R.; et al.
Science of the Total Environment, Elsevier 2018, Vol. 615 : 608-614
Lagesson, Annelie; Brodin, Tomas; Fahlman, Johan; et al.
Limnology and Oceanography, Wiley-Blackwell 2018, Vol. 63, (5) : 2171-2178
Seekell, David A.; Byström, Pär; Karlsson, Jan
Ecosystems (New York. Print), Springer 2018, Vol. 21, (6) : 1255-1268
Vasconcelos, Rivera Francisco; Diehl, Sebastian; Rodríguez, Patricia; et al.
Oecologia, Vol. 183, (2) : 587-595
Hedström, Per; Bystedt, David; Karlsson, Jan; et al.
Ambio, Vol. 45, (6) : 635-648
Ask, Jenny; Rowe, Owen; Brugel, Sonia; et al.
Ecology and Evolution, Vol. 6, (14) : 4753-4760
Calboli, Federico C. F.; Byström, Pär; Merila, Juha
Science of the Total Environment, Elsevier 2016, Vol. 568 : 208-215
Lagesson, Annelie; Fahlman, Johan; Brodin, Tomas; et al.
Environmental Evidence, BMC 2016, Vol. 5, (1) : 1-8
Macura, Biljana; Lonnstedt, Oona M.; Byström, Pär; et al.
Freshwater Biology, Vol. 61, (4) : 472-485
Norlin, Linnea; Byström, Pär; Karlsson, Jan; et al.
Aquatic Sciences, Vol. 78, (4) : 717-725
Rodriguez, Patricia; Byström, Pär; Geibrink, Erik; et al.
Regional Studies in Marine Science, Vol. 3 : 8-17
Rowe, Owen F.; Guleikova, Liudmyla; Brugel, Sonia; et al.
Ecology, Vol. 97, (10) : 2580-2592
Vasconcelos, Francisco Rivera; Diehl, Sebastian; Rodriguez, Patricia; et al.
Ambio, Vol. 44, (Suppl 3) : S462-S471
Byström, Pär; Bergström, Ulf; Hjälten, Alexander; et al.
Freshwater Biology, Wiley-Blackwell 2015, Vol. 60, (1) : 78-88
Jonsson, Micael; Hedström, Per; Stenroth, Karolina; et al.
Ecology, Ecological Society of America 2015, Vol. 96, (11) : 2870-2876
Karlsson, Jan; Bergström, Ann-Kristin; Byström, Pär; et al.
Limnology and Oceanography, Vol. 59, (5) : 1800-1803
Karlsson, Jan; Berggren, M.; Ask, Jenny; et al.
Journal of Experimental Marine Biology and Ecology, Elsevier 2014, Vol. 451 : 82-90
Lefébure, Robert; Larsson, S.; Byström, Pär
PLoS ONE, Vol. 8, (7) : e70404-
Byström, Pär; Ask, Per; Andersson, Jens; et al.
Larsson, Stefan; Byström, Pär; Berglund, Johnny; et al.
Global Change Biology, John Wiley & Sons 2013, Vol. 19, (5) : 1358-1372
Lefebure, Robert; Degerman, Rickard; Andersson, Agneta; et al.
Freshwater Biology, Vol. 57, (4) : 847-857
Byström, Pär; Huss, Magnus; Persson, Lennart
Limnology and Oceanography, Vol. 57, (4) : 1042-1048
Karlsson, Jan; Berggren, Martin; Ask, Jenny; et al.
Journal of Fish Biology, Vol. 79, (7) : 1815-1827
Lefébure, Robert; Larsson, S; Byström, Pär
Fundamental and Applied Limnology, Stuttgart: E. Schweizerbart 2011, Vol. 178, (4) : 315-324
Åhlén, Emma; Byström, Pär; Korsman, Tom; et al.
Oikos, John Wiley & Sons, Inc. 2010, Vol. 119, (2) : 384-392
Huss, Magnus; Byström, Pär; Persson, Lennart
Oikos, Vol. 119 : 1796-1804
Huss, Magnus; Byström, Pär; Persson, Lennart
Canadian Journal of Fisheries and Aquatic Sciences, Vol. 67, (2) : 401-416
van Kooten, Tobias; Andersson, Jens; Byström, Pär; et al.
Ecology, Washington, DC, USA: Ecological Society of America 2009, Vol. 90, (7) : 1923-1932
Ask, Jenny; Karlsson, Jan; Persson, Lennart; et al.
Limnology and Oceanography, American Society of Limnology and Oceanography, Inc. 2009, Vol. 54, (6) : 2034-2040
Ask, Jenny; Karlsson, Jan; Persson, Lennart; et al.
Nature, Vol. 460 : 506-509
Karlsson, Jan; Byström, Pär; Ask, Jenny; et al.
Oecologia, Berlin / Heidelberg: Springer 2008, Vol. 158, (2) : 249-257
Huss, Magnus; Byström, Pär; Persson, Lennart
Canadian Journal of Fisheries and Aquatic Sciences, EBSCO Host 2008, Vol. 65, (10) : 2149-2156
Huss, Magnus; Byström, Pär; Strand, Åsa; et al.
American Naturalist, Vol. 169 : 820-829
Andersson, Jens; Byström, Pär; Claessen, D; et al.
Freshwater Biology, John Wiley & Sons, Inc 2007, Vol. 52, (7) : 1271–1280-
Byström, Pär; Karlsson, Jan; Nilsson, Per; et al.
Oecologia, Berlin / Heidelberg: Springer 2007, Vol. 153, (1) : 57-67
Huss, Magnus; Persson, Lennart; Byström, Pär
Journal of Animal Ecology, Vol. 76, (1) : 94-104
Persson, Lennart; de Roos, André M; Byström, Pär
J Anim Ecol, Vol. 75, (2) : 434-44
Byström, Pär
Oikos, Vol. 115 : 43-52
Byström, Pär; Andersson, J; Kiessling, A; et al.
Limnol. Oceanogr., Vol. 50 : 538-543
Karlsson, J; Byström, P
Oikos, Vol. 104 : 109-121
Byström, P; Andersson, J; Persson, L; et al.
Oikos, Vol. 106 : 263-274
Persson, L; Byström, P; Wahlström, E; et al.
Ecological Monographs, Vol. 74 : 135-157
Persson, L; Claessen, D; De Roos,, A M; et al.