... has focused on water quality and maintaining some ""minimum"" flow that ... but on the naturally variable quantity and timing of flows throughout the year. ... leading water experts Sandra Postel and Brian Richter explain why restoring

... "This report analyzes the construction and planning of dams on a river basin scale and examines the risks of dams to ... River Basin in South America with 27 and the Tigris and Euphrates River Basin

... website displays the calls of frog and toad species in Eastern North America. ... of frogs, their habitat, photographs, and audio sounds. NatureSound Studios also provides bird photos and songs.

Herpetological Conservation and Biology is a peer- reviewed journal ... research, reviews, perspectives and correspondence on the life history ecology, management and conservation of amphibians and reptiles. Its focus demonstrates the

... published by the Association of State and Interstate Water Pollution Control ... the development of State/Interstate and Federal efforts to control water pollution prior to and since the enactment of the 1972 Clean

... formed at the interface of rivers and ecosystems. The study identifies the ... the principal federal policies and programs impacting riparian wetlands, ... about the impacts of these policies and programs on riparian wetlands,

... time protecting the aquatic ecosystems and ecological services upon which all ... of disciplines to present key insights and information on sustainable freshwater ... represent a variety of perspectives and expertise, helping to illuminate the

... world's remaining free-flowing rivers and seeks to answer the question why we ... maintain our last freeflowing rivers and whether this is a luxury or a ... the contributions to human welfare and to biodiversity made by freshwater

... investors -- officials of commercial and multi-lateral development banks, ... aid agencies, export credit agencies and governments -- with an overview of the benefits, costs, and risks associated with dam investments,

Viewed by some as symbols of progress and by others as inherently flawed, large ... of large dams on ecosystems, societies and political economies. He also analyses ... process for water resource development and tackles the highly contentious issue