1. Department of Biology, Stanford University, Stanford, CA 94305, USA.
2. Woods Institute for the Environment and Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA.
3. Environmental Studies, Prescott College, Prescott, AZ 86301, USA.
4. Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL 61801, USA.
5. Department of Horticulture, Cornell University, Ithaca, NY 14853, USA.
6. National Center for Atmospheric Research, Boulder, CO 80307, USA.
7. Aquatic Environments Research Centre, School for Human and Environmental Sciences, University of Reading, Whiteknights, Reading RG6 6AB, UK.
8. Aspen Global Change Institute, Aspen, CO 81611, USA.
9. Centro de Energia Nuclear na Agricultura–Universidade São Paulo (CENA-USP), Avenida Centenario 303, 13416-000, Piracicaba, SP, Brazil.
10. School of Earth Sciences, Stanford University, Stanford, CA 94305, USA.
11. The Earth Institute, Columbia University–Lamont Campus, Palisades, NY 10027, USA.
12. The Heinz Center for Science, Economics, and the Environment, Washington, DC 20009, USA.
13. Department of Crop and Soil Sciences, Michigan State University, Hickory Corners, MI 49060, USA.
14. Department of Ecology and Evolutionary Biology and INSTAAR, University of Colorado, Boulder, CO 80309, USA.
15. College of Resources and Environmental Science, China Agricultural University, Beijing 100094, China.