1. Department of Ecology and Evolutionary Biology University of Arizona Tucson Arizona 85721 USA
2. School of Natural Resources and the Environment University of Arizona Tucson Arizona 85721 USA
3. Ecology, Evolution, and Marine Biology University of California, Santa Barbara Santa Barbara California 93106 USA
4. North Cascades National Park 7280 Ranger Station Road Marblemount Washington 98267 USA
5. Agriculture and Natural Resources Division University of California Cooperative Extension Santa Barbara California USA
6. Bren School of Environmental Science and Management University of California at Santa Barbara Santa Barbara California 93106 USA
7. School of Environmental and Forest Sciences University of Washington Anderson Hall Seattle Washington 98195 USA
8. Department of Environmental Science, Policy, and Management University of California at Berkeley 130 Mulford Hall Berkeley California 94720 USA
9. Energy and Resources Group University of California at Berkeley 310 Barrows Hall Berkeley California 94720 USA