This Phase 1 draft final report provides a first-ever compilation of what is known—and not known— about climate change effects on freshwater aquatic and riparian ecosystems in the geographic extent of the North Pacific Landscape Conservation Cooperative (NPLCC). The U.S. Fish and Wildlife Service funded this report to help inform members of the newly established NPLCC as they assess priorities and begin operations. Production of this report was guided by University of Washington‘s Climate Impacts Group and information was drawn from more than 250 documents and more than 100 interviews. A final report will be published in 2012 following convening of expert focus groups under Phase II of this project.