Affiliation: | a University of Minnesota, Department of Forest Resources, 1530 Cleveland Ave. N., St. Paul, MN 55108, USAb University of Calgary, Biogeoscience Institute, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canadac University of Calgary, Department of Biological Science, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canadad Georg-August-University Goettingen, J.F. Blumenbach Institute of Zoology and Anthropology, Berliner Str.28, 37073 Goettingen, Germanye University of Innsbruck, Institute of Ecology, Technikerstr. 25, 6020 Innsbruck, Austria |