Freshwater Ecoregions of North America

A Conservation Assessment

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, ...

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Terrestrial Ecoregions of North America

A Conservation Assessment

Lauded in the New York Times science section as "a sweeping analysis of the ecosystems of the United States and Canada," this volume represents an unparalleled source of information and data for ...

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