1. Institute of Ecology and Evolution University of Bern Bern Switzerland
2. Department of Ecology and Evolutionary Biology University of California Santa Cruz California USA
3. Department of Fish and Wildlife Conservation Virginia Polytechnic Institute and State University Blacksburg Virginia USA
4. Department of Zoology University of Cambridge Cambridge UK
5. Center of Ecology, Evolution & Biogeochemistry Swiss Institute for Environmental Sciences and Technology (EAWAG) Kastanienbaum Switzerland