[1] Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA
[2] Univ Oslo, Dept Econ, N-0317 Oslo, Norway
[3] Univ Wisconsin, Ctr Limnol, Madison, WI 53706 USA
[4] Oregon State Univ, Dept Zool, Corvallis, OR 97331 USA
[5] CSIRO, Sustainable Ecosyst, Canberra, ACT 2601, Australia
[6] Abisko Sci Res Stn, S-98107 Abisko, Sweden
[7] Stockholm Univ, Dept Syst Ecol, SE-10691 Stockholm, Sweden
[8] Stockholm Univ, Ctr Transdisciplinary Environm Res, SE-10691 Stockholm, Sweden
[9] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA
[10] Beijer Inst, SE-10405 Stockholm, Sweden
[11] Umea Univ, Landscape Ecol Grp, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden
[12] Johns Hopkins Univ, Sch Adv Int Studies, Washington, DC 20036 USA
[13] Univ Manitoba, Inst Nat Resources, Winnipeg, MB R3T 2N2, Canada
[14] Swedish Univ Agr Sci, Dept Anim Ecol, SE-90183 Umea, Sweden
[15] Inst Council Sci, F-75016 Paris, France
[16] Stanford Univ, Dept Econ, Stanford, CA 94305 USA
[17] Univ Crete, Dept Econ, Rethimnon 74100, Crete, Greece
[18] Russian Acad Sci, NE Sci Stn, Pacific Inst Geog, Far E Branch, Cherskii 678830, Russia