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The NWI relies on trained image analysts to identify and classify wetlands and deepwater habitats from aerial imagery. NWI started mapping wetlands at a small scale (1:250,000 map which covers an area the size of 128-1:24,000 USGS topographic maps or approximately 7,400 square miles).
The wetland status of 7,000 plants is determined upon information contained in a list compiled in the National Wetland Inventory undertaken by the U.S. Fish and Wildlife Service and developed in cooperation with a federal inter-agency review panel (Reed, 1988). The National List was compiled in 1988 with subsequent revisions in 1996 and 1998.
The National Wetlands Research Center (NWRC) was founded in 1975 as part of the U.S. Fish and Wildlife Service's (USFWS) Office of Biological Services. Its headquarters are located in Lafayette, Louisiana. The NWRC is one of 16 science centers of the Biological Resources Division of the U.S. Geological Survey. The mission of the National ...
The U.S. Fish and Wildlife Service's National Wetlands Inventory (NWI) produces and provides information on the characteristics, extent, and status of U.S. wetlands and deepwater habitats and other wildlife habitats. The NWI also produces periodic reports on the status and trends of wetlands in the conterminous U.S.
A large wetland in western Minnesota.. Over the past 200 years, the United States has lost more than 50% of its wetlands. [1] And even with the current focus on wetland conservation, the US is losing about 60,000 acres (240 km 2) of wetlands per year (as of 2004). [2]
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Lacustrine wetlands- associated with a lake or other body of fresh water; Palustrine wetlands- freshwater wetlands not associated with a river or lake. The primary purpose of this ecological classification system was to establish consistent terms and definitions used in inventory of wetlands and to provide standard measurements for mapping ...
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