1. Department of Biological Sciences; North Carolina State University; Raleigh NC 27695 U.S.A.
2. Department of Plant Biology; Michigan State University; East Lansing MI 48824-1312 U.S.A.
3. Department of Zoology; University of Wisconsin; Madison WI 53706 U.S.A.
4. American Association for the Advancement of Science; 1200 New York Avenue NW Washington D.C. 20005 U.S.A.
5. National Science Foundation; Arlington VA 22230 U.S.A.
6. Department of Ecology and Evolutionary Biology, UCB 334; University of Colorado; Boulder CO 80309 U.S.A.
7. Department of Ecology; Evolution and Organismal Biology; Iowa State University; 253 Bessey Hall Ames IA 50011 U.S.A.
8. The Luc Hoffmann Institute; WWF International; Avenue du Mont-Blanc 27 1196 Gland Switzerland
9. Illinois State Geological Survey; University of Illinois Urbana-Champaign; 615 E. Peabody Drive MC-650 Champaign IL 61820-6918 U.S.A.
10. Potomac Conservancy; 8601 Georgia Avenue, Suite 612 Silver Spring MD 20910 U.S.A.