As part of a global effort to identify those areas where conservation measures are needed most urgently, World Wildlife Fund has assembled teams of scientists to conduct ecological assessments of all ...
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, ...
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 ...
