Jeff J. Opperman is the director and lead scientist for The Nature Conservancy's Great Rivers Program. Peter B. Moyle is Distinguished Professor Emeritus in the Department of Wildlife, Fish, and Conservation Biology and Associate Director of the Center for Watershed Sciences at the University of California, Davis. Eric W. Larsen is a research scientist and fluvial geomorphologist in the Department of Human Ecology at the University of California, Davis. Joan L. Florsheim is a researcher in fluvial geomorphology, hydrology, and earth surface processes at the Earth Research Institute at the University of California, Santa Barbara. Amber D. Manfree is a postdoctoral researcher in Geography at the Center for Watershed Sciences at the University of California, Davis.