1. Department of Ecology and Environmental Science; Umeå University; Umeå 90187 Sweden
2. Department of Wildlife, Fish, and Environmental Studies; Swedish University of Agricultural Sciences; Umeå 90183 Sweden
3. Cardiff School of the Social Sciences; Cardiff University; Glamorgan Building, King Edward VII Avenue Cardiff CF10 3WA U.K.
4. Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 U.S.A.
5. Department of Political Science; Umeå University; Umeå 90187 Sweden
6. Department of Natural Resources Science; University of Rhode Island; Kingston RI 02881 U.S.A.