U.S. Geological Survey ecosystems science strategy—Advancing discovery and application through collaboration - Williams, Byron; Wingard, G. Lynn; Brewer, Gary; Cloern, James; Gelfenbaum, Guy; Jacobson, Robert; Kershner, Jeffrey; McGuire, Anthony; Nichols, James D.; Shapiro, Carl; van Riper III, Charles; White, Robin (Circular, 2013)