Wetlands Status and Trends in the Conterminous United States, Mid-1970's to Mid-1980's. First Update of the National Wetlands Status Report, 1991

摘要

The Emergency Wetlands Resources Act of 1986 (16 U.S.C. 3931(a)) requires the Secretary of the Interior, acting through the Director of the Fish and Wildlife Service, to produce updated reports on the status and trends of wetlands and deepwater habitats in the conterminous United States, on a ten year cycle. The report is the first update of an earlier report titled Status and Trends of Wetlands and Deepwater Habitats in the Conterminous United States, 1950's to 1970's, which was completed in 1982. It constitutes a statistically valid effort to estimate the Nation's wetland resources and provide indications of gains or losses for 14 categories of wetland and deepwater habitats.