1. Klamath Center for Conservation Research; Orleans CA USA
2. Department of Biometry and Environmental System Analysis; University of Freiburg; Freiburg Germany
3. School of Environmental and Forest Sciences; University of Washington; Seattle WA USA
4. Renewable Resources Department; University of Alberta; Edmonton AB Canada
5. The Nature Conservancy; Fort Collins CO USA
6. Department of Forest and Conservation Sciences; University of British Columbia; Vancouver BC Canada