1. Department of Geography; Nipissing University; 100 College Drive, North Bay Ontario P1B 8L7 Canada
2. Desert Research Institute; 2215 Raggio Parkway, Reno Nevada 89512 USA
3. National Park Service; Alaska Regional Office; 240 W 5th Ave., Anchorage Alaska 99501 USA
4. Geography Department; Humboldt State University; 1 Harpst Street, Arcata California 95521 USA
5. U.S. Fish and Wildlife Service; Kenai National Wildlife Refuge; 1 Skihill Road, Soldotna Alaska 99669 USA
6. Department of Biological Sciences; University of Alaska-Anchorage; 3200 Providence Drive, Anchorage Alaska 99508 USA