[1] Stanford Univ, Dept Biol, Stanford, CA 94305 USA
[2] Stanford Univ, Woods Inst Environm, Stanford, CA 94305 USA
[3] Stanford Univ, Freeman Spogli Inst Int Studies, Stanford, CA 94305 USA
[4] Prescott Coll, Prescott, AZ USA
[5] Univ Illinois, Dept Nat Resource & Environm Sci, Urbana, IL 61801 USA
[6] Cornell Univ, Dept Hort, Ithaca, NY 14853 USA
[7] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[8] Univ Reading, Sch Human & Environm Sci, Aquat Environm Res Ctr, Reading RG6 6AB, Berks, England
[9] Aspen Global Change Inst, Aspen, CO 81611 USA
[10] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13416000 Piracicaba, SP, Brazil
[11] Stanford Univ, Sch Earth Sci, Stanford, CA 94305 USA
[12] Columbia Univ, Earth Inst, Palisades, NY 10027 USA
[13] Heinz Ctr Sci Econ & Environm, Washington, DC 20009 USA
[14] Michigan State Univ, Dept Crop & Soil Sci, Hickory Corners, MI 49060 USA
[15] Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80309 USA
[16] Univ Colorado, INSTAAR, Boulder, CO 80309 USA
[17] China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China