Fishes are the most diverse group of vertebrates, are key players in aquatic ecosystems, provide a diverse set of ecosystem services, and are sensitive to environmental change. We study their ecology, evolution and conservation. We work with fish diversity from traits and genes in populations to the diversity of species assemblages, their change through time and the ecosystem consequences. We are particularly interested in understanding the evolution of endemic diversity within individual ecosystems, such as the radiations of cichlid fish in African lakes and the radiation of whitefish in the lakes around the European Alps. We are a single research group led by Ole Seehausen at the University of Bern but Ole also leads the Department Fish Ecology and Evolution at the Eawag Center for Ecology, Evolution and Biogeochemistry, Kastanienbaum, where we currently host three other research groups that are all associated with the IEE too. The work of the Eawag department is motivated by the aim to contribute to the emerging synthesis between evolutionary biology and ecosystems ecology. There we also host the Swiss Fisheries Advisory Service.
NatureEcolEvol - Transgenerational selection driven by divergent ecological impacts of hybridizing lineages
Rebecca and colleagues published an exciting new study on transgenerational eco-evolutionary feedbacks using threespined stickleback of two evolutionary lineages their F1 hybrids. They found that (i) juveniles do less well in mesocosms modified by adults of their own evolutionary lineage than in those modified by the other lineages (particularly true in the Geneva-adult modified tanks), and (ii) that F1 hybrids do much better than non-hybrid juveniles of either lineage, and the advantage of hybrids was particularly strong when resources were limiting. Read more on Rebecca's paper on her great "Behind the paper" blog on https://tinyurl.com/y7u6ebcv .