Journal Article Research Support, U.S. Gov't, Non-P.H.S. climate variability North Pacific Gyre Oscillation Research Support, Non-U.S. Gov't Review San Francisco Estuary climate change crustaceans demersal ecosystems environmental change estuarine-coastal estuary estuary salinity zones estuary-ocean exchange fish fish assemblage freshwater outflow global change human disturbance nutrient management ocean climate pelagic phytoplankton temperature upwelling