Affiliation: | 1. U.S. Geological Survey, Geosciences and Environmental Change Science Center, Denver Federal Center MS 980, Denver, CO, 80225 USA;2. U.S. Geological Survey, Geosciences and Environmental Change Science Center, Denver Federal Center MS 980, Denver, CO, 80225 USA E-mail: jediffendorfer@usgs.gov;3. Oklahoma State University, Natural Resource Ecology and Management, 005AC Ag Hall, Stillwater, OK, 74078 USA |