Affiliation: | Department of Biology, University of Utah, Salt Lake City, Utah, USA;;Smithsonian Tropical Research Institute, Panama City, Panama;;Department of Plant Ecology and Systematics, University of Kaiserslautern, 67663 Kaiserslautern, Germany;;USDA Forest Service, Northern Research Station, 705 Spear St, S. Burlington, VT 05403, USA;and;Department of Renewable Resources, 4-42 ESB, University of Alberta, Edmonton, AB, Canada T6G 2E3 |