1. Department of Biology; University of Maryland; College Park MD 20742 USA
2. Centre for Mathematical Biology; Department of Mathematical and Statistical Sciences; University of Alberta; Edmonton AB Canada T6G 2G1
3. Department of Biological Sciences; University of Alberta; Edmonton AB Canada T6G 2E9
4. Department of Integrative Biology; University of Guelph; Guelph ON Canada N1G 2W1
5. Centre d'Ecologie Fonctionnelle et Evolutive; CNRS UMR5175; 34000 Montpellier France
6. Department of Biology; ms 314; University of Nevada, Reno; Reno NV 89557 USA
7. Department of Geography and Earth Sciences; Center for Applied Geographic Information Science; University of North Carolina at Charlotte; Charlotte NC 28223 USA
8. Florida Museum of Natural History; University of Florida; Gainesville FL 32611 USA
9. Department of Fisheries, Wildlife, and Conservation Biology; University of Minnesota; Saint Paul MN 55108 USA
10. Biodiversity and Climate Research Centre (BiK-F) and Senckenberg Gesellschaft für Naturforschung; Senckenberganlage 25 60325 Frankfurt (Main) Germany