| Abstract: | Marshes, swamps, ponds, and bogs are teeming biological nurseries for migratory birds, fish, and aquatic plants. They also provide natural flood and erosion control. These predominantly wet areas, or wetlands as they are commonly called, now represent only about 5 percent of the land surface of the lower 48 States. Out of 221 million acres of wetlands that once existed in the conterminous United States, the U.S. Fish and Wildlife Service (FWS) estimates that only about 103.3 million acres remain.
Each year, development, drainage, and agriculture eliminate another 290,000 acres - an area a little less than half the size of Rhode Island. From the 1950‘s to the 1970‘s, conversion of wetlands to farmland caused 87 percent of all wetland losses.
The FWS has long recognized the importance of America‘s wetlands because they form breeding and wintering grounds for great numbers of migratory birds. In 1977, the FWS began the National Wetlands Inventory (NWI), a systematic effort to classify and map America‘s remaining wetlands. |
| Genre: | USGS Numbered Series |
| ProdID: | 6717 |
| Citation Author: | Geological Survey (U.S.) |
| Citation Contributing Office: | Geological Survey (U.S.) |
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| Citation Edition: | - |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 2 p. |
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| Citation Publisher: | U.S Geological Survey |
| Citation Series: | Fact Sheet |
| Citation Series Code: | FS |
| Citation Series Number: | 080-99 |
| Citation Search Results Text: | National Wetlands Inventory products; 1999; FS; 080-99; Geological Survey (U.S.) |
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| Citation Year: | 1999 |
| Type: | citation/reference |
| Text: | National Wetlands Inventory products; 1999; FS; 080-99; Geological Survey (U.S.) |
| URL (THUMBNAIL): | http://pubs.usgs.gov/fs/1999/0080/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/fs/1999/0080/report.pdf |
| Date Other: | Tue, 1 Feb 2000 00:00 -0600 |
| Publisher: | U.S Geological Survey |
| Superseded by: |
http://pubs.er.usgs.gov/publication/fs19195
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