1. Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA 94720 USA
2. Department of Biology University of New Mexico Albuquerque NM 87131 USA
3. School of Life Sciences Arizona State University Tempe AZ 85287 USA
4. School of Sustainability Arizona State University Tempe AZ 85287 USA
5. Global Drylands Center Arizona State University Tempe AZ 85287 USA