1. Department of Forest Resources University of Minnesota 115 Green Hall 1530 Cleveland Ave. N. St. Paul MN 55108 USA
2. Department of Forestry and Geography Michigan State University 126 Natural Resources Building East Lansing MI 48824 USA
3. Rubenstein School of Environment and Natural Resources University of Vermont 204E Aiken Center 81 Carrigan Drive Burlington VT 05405 USA
4. US Geological Survey ‐ Southwest Biological Science Center Northern Arizona University Building 20, P.O. Box 5614 Flagstaff AZ 86011 USA
5. Department of Biostatistics UCLA School of Public Health Room 51‐254B CHS Los Angeles CA 90095‐1772 USA