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National Wetlands Inventory Classification System
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Classification
system (Cowardin and others, 1979)
used by the U.S. Fish and Wildlife Service (USFWS) in the National
Wetland Inventory (NWI). This partial list of units includes only
those mapped along the Mustang Island State Park and Port Aransas
transects.
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USFWS/NWI Code |
Classification description |
Common Description |
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U |
Upland |
Not a wetland |
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PEM1A |
Palustrine emergent persistent wetland, temporarily flooded |
Fresh or interior marsh, persistent vegetation, topographically high |
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PEM1C |
Palustrine emergent persistent wetland, seasonally flooded |
Fresh or interior marsh, persistent vegetation, topographically low |
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E2EM1P |
Estuarine intertidal persistent emergent wetland, irregularly flooded |
Salt- to brackish-water marsh, persistent vegetation, topographically high |
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E2EM1N |
Estuarine intertidal persistent emergent wetland, regularly flooded |
Salt- to brackish-water marsh, persistent vegetation, topographically low |
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E2AB1P |
Estuarine intertidal aquatic bed, algal, irregularly flooded |
Tidal and wind-tidal flats, with algal mats, topographically high |
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E2USP |
Estuarine intertidal unconsolidated shore, irregularly flooded |
Tidal and wind-tidal flats, topographically high |
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E2USN |
Estuarine intertidal unconsolidated shore, regularly flooded |
Tidal and wind-tidal flats, topographically low |
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E1UBL |
Estuarine subtidal unconsolidated bottom, subtidal |
Estuarine open water |
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M2USP |
Marine intertidal unconsolidated shore, irregularly flooded |
Backbeach along Gulf shore |
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M2USN |
Marine intertidal unconsolidated shore, regularly flooded |
Forebeach along Gulf shore |