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This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth,...
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Plant data were collected on 16, 1-ha experimental blocks in C3 and Marsh Creek units of Seney National Wildlife Refuge, 2006-2010. The percent cover of each plant taxon, moss as a group, and open area was recorded sing a modified line-intercept method for each of 25 sampling points within a block. Sampling points were equidistantly spaced, with 5 points spaced 25 m apart along each of 5 transects also spaced 25 m apart within each sampling block. Within each unit, we selected 4 pairs of blocks representing sedge-shrub habitat, with one of the pair assigned to spring burning (C3, May 2008) or summer burning (Marsh Creek, 2007 and 2008). This before-after-control-impact design provided for data collection two growing...
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This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth,...
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Due to the quantity and complexity of the data, wetlands and riparian data only displays at 1:250,000 scale and greater. For wetland information visit www.fws.gov/wetlands/The original wetland maps were produced as topical overlays using U.S. Geological Survey topographic maps as the base. Thus, the data are intended for use in publications, at a scale of 1:24,000 or smaller. Due to the scale, the primary intended use is for regional and watershed data display and analysis, rather than specific project data analysis. The wetlands data were neither designed nor intended to represent legal or regulatory products. These data were developed in conjunction with the Cowardin et al. publication (Cowardin, L.M., V. Carter,...
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This data set represents the extent, approximate location and type of wetlands and deepwater habitats in Arizona. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial...
map background search result map search result map LSCFWSModifier_WETDBA.CONUS_wet_poly National Wetlands Inventory - Wetlands Wetlands and deepwater habitats in the state of Colorado, USA National Wetlands Inventory (NWI) polygon data, Arizona Plant taxa in C3 and Marsh Creek experimental blocks, Seney National Wildlife Refuge, Michigan, 2006-2010 LSCFWSModifier_WETDBA.CONUS_wet_poly Plant taxa in C3 and Marsh Creek experimental blocks, Seney National Wildlife Refuge, Michigan, 2006-2010 National Wetlands Inventory (NWI) polygon data, Arizona Wetlands and deepwater habitats in the state of Colorado, USA National Wetlands Inventory - Wetlands