1. Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
2. Department of Biology, University of Maryland, College Park, MD 20742, USA.
3. National Center for Ecological Analysis and Synthesis, 735 State Street, Suite 300, Santa Barbara, CA 93101, USA.
4. Smithsonian Tropical Research Institute, Box 0843-03092, Balboa Ancón, Republic of Panamá.
5. Department of Biology, Washington University, St. Louis, MO 63130, USA.
6. Department of Ecology and Evolutionary Biology, 569 Dabney Hall, University of Tennessee, Knoxville, TN 37996, USA.
7. Center of Macroecology, Evolution and Climate, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen O, Denmark.
8. Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA.
9. Institute for the Environment and Sustainability, and Department of Zoology, Miami University, Oxford, OH 45056, USA.
10. Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA.
11. Fundamental and Computational Sciences Directorate, Biological Sciences Division, Pacific Northwest National Lab, Richland, WA 99352, USA.
12. Département de Biologie, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada.
13. Department of Ecology and Evolution, University of Arizona, Tucson, Arizona 85719, USA.
14. New Zealand Institute for Advanced Study, Massey University, Albany Campus, Auckland 0745, New Zealand.
15. Department of Environmental Science and Policy, University of California, Davis, Davis, CA 95616, USA.
16. Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA.
17. Department of Biology, Temple University, Philadelphia, PA 19122, USA.
18. Biological Science, Florida State University, Tallahassee, FL 32306–4295, USA.