1. Odum School of Ecology; 140 E Green St., University of Georgia; Athens Georgia 30602 USA
2. Senckenberg Biodiversity and Climate Research Center (BiK-F); Senckenberganlage 25 D-60325 Frankfurt (Main) Germany
3. Department of Biology; McGill University; Montreal Quebec H3A1B1 Canada
4. Department of Zoology; University of British Columbia; Vancouver British Columbia V6T1Z4 Canada
5. Department of Environmental Sciences; Emory University; Atlanta Georgia 30322 USA
6. Inland Fisheries Division; Texas Parks and Wildlife Department; Austin Texas 78744 USA
7. Cary Institute of Ecosystem Ecology; Millbrook New York 12545 USA
8. Biological Sciences; Duke University; Durham North Carolina 27708 USA