1. Department of Ecology and Evolutionary Biology; Cornell University; Ithaca New York 14853 USA
2. Department of Environmental Science, Policy, and Management; University of California, Berkeley; Berkeley California 94720 USA
3. Advanced Science Research Center; City University of New York; New York New York 10031 USA
4. MacArthur Agro-Ecology Research Center; Lake Placid Florida 33852 USA
5. Department of Plant Biology; University of Illinois at Urbana-Champaign; Urbana Illinois 61801 USA
6. Institute of Genomic Biology; University of Illinois at Urbana-Champaign; Urbana Illinois 61801 USA
7. Energy Biosciences Institute; University of Illinois at Urbana-Champaign; Urbana Illinois 61801 USA