1. USGS Alaska Science Center4210 University Drive, Anchorage, AK 99508, USA
2. USGS Alaska Science Center3100 National Park Road, Juneau, AK 99801, USA
3. Climate Prediction Center, NOAA5200 Auth Road, Camp Springs, MD 20746, USA
4. PRBO Conservation Science3820 Cypress Drive, Petaluma, CA 94954, USA
5. US Fish and Wildlife Service, Yukon Delta National Wildlife RefugePO Box 346, Bethel, AK 99559, USA
6. School of Biological Sciences, University of Auckland1142 Auckland, New Zealand
7. Royal Netherlands Institute for Sea Research (NIOZ), Texel, and Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen9750 AA Haren, The Netherlands