Freshwater Ecoregions of North America
by Robin A. Abell and World Wildlife Fund (U.S.)
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Description
North America's freshwater habitats and the extraordinary biodiversity they contain are facing unprecedented threats from a range of sources, including flow alteration, habitat fragmentation, introduced species, and overall land use changes. With nearly every freshwater system suffering from some degree of degradation and conservation resources limited, there is an urgent and practical need to set priorities.