Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressed--restoration--is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines * Key concepts and techniques used in restoration. * Common factors in successful restoration efforts. * Threats to the health of the nation's aquatic ecosystems. * Approaches to evaluation before, during, and after a restoration project. * The emerging specialties of restoration and landscape ecology.