Affiliation: | 1. Department of Fisheries, Wildlife and Conservation Biology, 2003 Upper Buford Circle, University of Minnesota-Twin Cities, St. Paul, MN, 55108 USA E-mail: gmstreet@umn.edu;2. Ontario Ministry of Natural Resources and Forestry, Centre for Northern Forest Ecosystem Research, 955 Oliver Road,, Thunder Bay, ON, P7B 5E1 Canada;3. Department of Integrative Biology , 50 Stone Road W, University of Guelph, Guelph, ON, N1H 7M5 Canada |