1. a Environmental Studies Program, Hollins University, Roanoke, Virginia
2. b Department of Natural Science, Hawai‘i Pacific University, Kaneohe, Hawaii
3. c Ottawa, Ontario, Canada
4. d School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona
5. e Department of Agricultural Economics, Sociology, and Education, The Pennsylvania State University, University Park, Pennsylvania
6. f Arid Land Agricultural Research Center, U.S. Department of Agriculture, Maricopa, Arizona