1. Sustainable Food and Bioenergy Systems Program, Department of Health and Human Development, Montana State University, Bozeman, MT 59715, USA
2. Department of Biology, Tufts University, Medford, MA 02155, USA
3. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA
4. Department of Earth Sciences, Boston University, Boston, MA 02215, USA
5. Department of Biochemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
6. Department of Anthropology, University of Gainesville, Gainesville, FL 32611, USA
7. Department of Chemistry, Tufts University, Medford, MA 02155, USA
8. Department of Biological Sciences, Lehman College, Bronx, NY 10468, USA