1. Department of Ecological Sciences, Systems Ecology; VU University; de Boelelaan 1085 1081 HV Amsterdam The Netherlands
2. Evolution & Ecology Research Centre; School of Biological, Earth and Environmental Sciences; University of New South Wales; Sydney NSW 2052 Australia
3. Department of Biological Sciences; Macquarie University; Sydney NSW 2109 Australia
4. Department of Zoology and Biodiversity Research Centre; University of British Columbia; Vancouver BC V6T1Z4 Canada
5. Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN 37996 USA
6. Department of Biological Sciences and; Institute for Bioinformatics and Evolutionary Studies; University of Idaho; Moscow ID 83844 USA
7. Department of Biology and the Ecology Center; Utah State University; Logan UT 84322 USA
8. Department of Forest Resources; University of Minnesota; St. Paul MN 55108 USA
9. Department of Biology; Queen's University; Kingston ON K7L 3N6 Canada
10. National Institute for Mathematical & Biological Synthesis; University of Tennessee; Knoxville TN 37996 USA
11. National Herbarium of New South Wales; Royal Botanic Gardens and Domain Trust; Mrs. Macquaries Rd. Sydney NSW 2000 Australia
12. Department of Biology; University of Missouri - St. Louis; St. Louis MO 63121 USA
13. Department of Plant Physiology; Estonian University of Life Sciences; Kreutzwaldi 1 51014 Tartu Estonia
14. Polish Academy of Sciences; Institute of Dendrology; 62-035 Kornik Poland
15. Nelson Institute Center for Climatic Research; Madison WI 53706 USA
16. Department of Earth and Environmental Sciences; Wesleyan University; Middletown CT 06459 USA
17. Department of Ecology and Evolutionary Biology; University of Michigan; Ann Arbor MI 48109 USA
18. Institute of Pacific Islands Forestry; USDA Forest Service; Hilo HI 96720 USA
19. Department of Geosciences; Pennsylvania State University; University Park PA 16802 USA
20. Department of Biological Sciences; George Washington University; Washington DC 20052 USA
21. Center for Conservation and Sustainable Development; Missouri Botanical Garden; St. Louis MO 63121 USA