1. Division of Mathematical and Natural Sciences, Arizona State University at the West Campus , Glendale, AZ, 85306, USA
2. Environmental Studies Program, Dartmouth College , Hanover, NH, 03755, USA
3. Department of Biological Sciences, Virginia Polytechnic Institute and State University , Blacksburg, VA, 24061, USA
4. Dept of Civil & Environmental Engineering, Pennsylvania State University, University Park PA, 16802, USA
5. Department of Biology and Natural Resource Ecology Laboratory, Colorado State University , Fort Collins, CO, 80523, USA