1. Environmental Sciences Division
Oak Ridge National Laboratory
Oak Ridge, TN 37831–6335, USA
2. Department of Biology
Queens University
Kingston, ON K7L 3N6, Canada
3. Division of Wildlife and Ecology
Commonwealth Scientific and Industrial Research Organisation
Post Office Box 84
Lyneham, ACT 2602, Australia
4. Biological Research Division
U.S. Geological Survey
4512 McMurray Avenue
Fort Collins, CO 80525–3400, USA
5. Department of Biology
Campus Box 3280
University of North Carolina
Chapel Hill, NC 27599–3280, USA
6. Centre d'Ecologie Fonctionnelle
et Evolutive
1919 Route de Mende
34293 Montpellier Cedex 5, France
7. Unit of Comparative Plant Ecology
Department of Animal and Plant Sciences
University of Sheffield
Sheffield, S10 2TN, UK
8. Department of Rangeland
Ecosystem Science
Colorado State University
Fort Collins, CO 80512, USA
9. Buxton Climate Change Impacts Laboratory
Department of Animal and Plant Sciences
University of Sheffield
10. Department of Ecology and
Evolutionary Biology
University of Michigan
Ann Arbor, MI 48109, USA
11. Landcare Research
Post Office Box 69
Lincoln 8152, New Zealand