CV page

Örjan Östman

Örjan Östman
My research interests span spatio-temporal environmental effects on eco-evolutionary dynamics of populations, population structure and distributions, and species interactions in food webs, mainly in aquatic communities. I am an external collaboration specialist in aquatic ecology with focus on ecosystem based fish management.

Research

I'm currently involved in the following more specific research projects:

1. Climate and fishery induced changes in genetics, life-history and population structure of Baltic Sea fish species. Are fish populations spatially structured, and what drives the structuring? Importance of environmnetal changes versus fisheries on population and life history development? Spatial structure of ecological indicators of coastal fish communities and how they respond to environmental variation?

Key references:

Östman et al. 2015. Relative contribution of evolutionary and ecological dynamics to body size and life-history changes of herring (Clupea harengus) in the Bothnian Sea. Evolutionary Ecology Research, In press. http://www.evolutionary-ecology.com/issues/forthcoming/ar2915.pdf.

Lindegren, M., Östman, Ö. & Gårdmark, A. 2011. Interacting trophic forcing and the population dynamics of herring. Ecology 92: 1407-1413.

2. Drivers and consequences of intraspecific variation in aquatic metacommunities. What are the causes of intraspecific variation within species? Consequences for abundance and distributions of species?

Key references

Liao, YF, Faulks, LK., Östman, Ö. 2015. Stress tolerance and population stability of rock pool Daphnia in relation to local conditions and population isolation. Hydrobiologia 742, 267-278.

Faulks, L., Svanbäck, R., Eklöv, P., Östman, Ö. 2015. Genetic and morphological divergence along the littoral–pelagic axis in two common and sympatric fishes: perch, Perca fluviatilis (Percidae) and roach, Rutilus rutilus (Cyprinidae). Biological Journal of the Linnean Society 114, 929-940.

Faulks, L., Svanbäck, R., Ragnarsson-Stabo, H., Eklöv, P., Östman, Ö. 2015. Intraspecific niche variation drives abundance-occupancy relationships in freshwater fish communities. American Naturalist. Accepted.

Östman, Ö. 2011. Abundance – occupancy relationships in metapopulations: Examples of rockpool Daphnia. Oecologia 165: 687–697.

Östman, Ö. 2011. Interspecific competition affects genetic structure but not genetic diversity of Daphnia magna. Ecosphere 2: 34

3. Bottum-up and top down effects of coastal and pelagic food-webs in a changing world. Importance of eutrophication relative loss of top-predators on food-web structure and stability in Fucus and Zostera foood-webs? Food-web structure and stability of size-structured food-webs in the Baltic Sea. Ongoing work only.

Selected publications

Publication list 2010-2015:
(see my page at Research Gate or email me for pdf-files and currently updated publication list):
1. Faulks, L., Svanbäck, R., Ragnarsson-Stabo, H., Eklöv, P., Östman, Ö. 2015. Intraspecific niche variation drives abundance-occupancy relationships in freshwater fish communities. American Naturalist. Accepted.
2. *Östman, Ö., Karlsson, O., Pönni, J., Kaljuste, O., Aho, T., Gårdmark, A. 2015. Relative contribution of evolutionary and ecological dynamics to body size and life-history changes of herring (Clupea harengus) in the Bothnian Sea. Evolutionary Ecology Research, In press. http://www.evolutionary-ecology.com/issues/forthcoming/ar2915.pdf.
3. *Faulks, L., Svanbäck, R., Eklöv, P., Östman, Ö. 2015. Genetic and morphological divergence along the littoral–pelagic axis in two common and sympatric fishes: perch, Perca fluviatilis (Percidae) and roach, Rutilus rutilus (Cyprinidae). Biological Journal of the Linnean Society 114, 929-940.
4. *Liao, YF, Faulks, LK., Östman, Ö. 2015. Stress tolerance and population stability of rock pool Daphnia in relation to local conditions and population isolation. Hydrobiologia 742, 267-278.
5. Berga, M., Östman, Ö., Lindström, ES., Langenheder, S. 2015. Combined effects of zooplankton grazing and dispersal on the diversity and assembly mechanisms of bacterial metacommunities. Environmental Microbiology. In press. DOI: 10.1111/1462-2920.12688.
6. Östman, Ö., Wengström, Å., Wissman, J., Grandin, U., Schäfer, M., Lundström JO. 2015. Lower abundance of flood water mosquito larvae in managed wet meadows in the lower Dalälven floodplains, Sweden. Wetland Ecology and Management,23: 257-267.
7. Severin, I., Lindström, ES., Östman, Ö. 2014. Relationships between Bacterial Community Composition, Functional Trait Composition and Functioning Are Context Dependent–but What Is the Context? PloS One 9, e112409.
8. Hesson, JC., Rettich,F., Merdić, E., Vignjević, G. Östman, Ö., Schäfer, M. Schaffner, F., Foussadier,R., Besnard, G. Medlock, M., Scholte, E-J., Lundström, JO. 2014. The arbovirus vector Culex torrentium is more prevalent than Culex pipiens in north and central Europe. Medical and Veterinary Entomology, 28: 179-186.
9. Persson-Vinnersten, TZ., Östman, Ö., Schäfer, ML., Lundström, JO. 2014. Insect emergence in relation to floods in wet meadows and swamps in the River Dalälven floodplains. Bulletin of Entomological Research, 104: 453-461.
10. Östman, Ö, Boström, MK., Bergström, U., Andersson, J., Lunneryd, S-G. 2013. Competition for fish between cormorants and coastal fisheries in the Baltic Sea. PlosOne 8:e83763.
11. Severin, I., Östman, Ö., Lindström ES. 2013. Variable effects of dispersal on productivity of bacterial communities due to changes in functional trait composition. PlosOne 8:e80825.
12. Östman, Ö., Langenheder, S. 2013. Weak seasonality and synchrony among bacterial communities in small pools. Aquatic Microbial Ecology 69: 223-229.
13. Östman, Ö., Drakare, S., Kritzberg, E.S., Langenheder, S., Logue, J.B. & Lindström, E.S. 2012. The importance of space and local environmental conditions for associations between local and regional abundances. Aquatic Microbial Ecology 67: 35–45.
14. Gårdmark, A., Östman, Ö., Nilsen, A., Lundström, K., Karlsson, O., Pönni, J., & Aho, T. Does predation by grey seals (Halichoerus grypus) affect Bothnian Sea herring stock estimates? ICES Journal of Marine Science 69: 1448–1456.
15. Östman, Ö., Bergenius, MAJ., Boström, MK. & Lunneryd, SG. 2012. Do cormorant colonies affect local fish communities in the Baltic Sea? Canadian Journal of Fisheries and Aquatic Sciences 69: 1047–1055.
16. Boström, MK, Östman, Ö., Bergenius, MAJ., & Lunneryd, SG. 2012. Cormorant diet in relation to temporal changes in fish communities. ICES Journal of Marine Science 69:175-183.
17. Lundin, D., Severin, I., Logue, JB., Östman, Ö., Andersson, AF. & Lindström, ES. 2012. Which sequencing depth is sufficient to describe patterns in bacterial α- and β-diversity? Environmental Microbiology Reports 4: 367-372.
18. Beier, S., Mohit, V., Ettema, T.J.G., Östman, Ö., Tranvik, L.J., & Bertilsson, S. 2012. Pronounced seasonal dynamics of freshwater chitinase genes and chitin processing. Environmental Microbiology 14:2467-2479.
19. Langenheder, S., Berga, M., Östman, Ö. and Szekely, AJ. 2012. Temporal variation of beta diversity and assembly mechanisms in a bacterial metacommunity. ISME Journal 6, 1107–1114.
20. Östman, Ö. 2011. Abundance – occupancy relationships in metapopulations: Examples of rockpool Daphnia. Oecologia 165: 687–697.
21. Östman, Ö. 2011. Interspecific competition affects genetic structure but not genetic diversity of Daphnia magna. Ecosphere 2: 34.
22. Östman, Ö. & Stuart-Fox, D. 2011. Sexual selection is positively associated with ecological generalism among agamid lizards. Journal of Evolutionary Biology 24: 733–740.
23. Lindström, E.S. & Östman, Ö., 2011. The importance of dispersal for bacterial functions. PLoS One, 6: e25883.
24. Lindegren, M., Östman, Ö. & Gårdmark, A. 2011. Interacting trophic forcing and the population dynamics of herring. Ecology 92: 1407-1413.
25. Hesson, J.C., Östman, Ö. Schäfer, M. and Lundström, J.O. 2011. Geographic distribution and relative abundance of the sibling vector species Culex torrentium and Culex pipiens in Sweden. Vector-Borne and Zoonotic Diseases 11: 1383-1389.
26. Östman, Ö., Drakare, S., Kritzberg, E.S., Langenheder, S., Logue, J.B. & Lindström, E.S. 2010. Regional invariance among microbial communities. Ecology Letters 13: 118-127.
27. Mellbrand, K., Östman,Ö. & Hambäck, PA. 2010. Effects of subsidized spiders on coastal food webs in the Baltic Sea area. Basic and Applied Ecology 11: 450-458.


Contact
Senior Lecturer at the Institutionen för akvatiska resurser
Telephone: +46104784153
Postal address:
Kustlaboratoriet, Skolgatan 6
742 42 Öregrund
Visiting address: Skolgatan 6, Öregrund