1. Department of Natural Resources and Environmental Science, University of Nevada Reno, Reno, NV 89557
2. Division of Biological Sciences, Flathead Lake Biological Station, University of Montana, Polson, MT 59860
3. U.S. Geological Survey, Earth System Processes Division, Reston, VA 20192
4. U.S. Geological Survey, Southwest Biological Science Center, Flagstaff, AZ 86001