Vegetation Classification and Mapping Project Report - USGS

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USGS-NPS Vegetation Mapping Program Colonial National Historical Park in high marsh landward and by vegetation dominated by Spartina alterniflora (smooth cordgrass) or Spartina cynosuroides (big cordgrass) in low marsh seaward. This vegetation does not typically occur along the edge of tidal channels. Most Abundant Species: Stratum Lifeform Species Herb (field) Graminoid Schoenoplectus americanus (chairmaker's bulrush) Characteristic Species: Schoenoplectus americanus (chairmaker's bulrush), Spartina patens (saltmeadow cordgrass). Other Noteworthy Species: Information not available. USFWS Wetland System: Estuarine. DISTRIBUTION Range: This association is currently described from mid-Atlantic states of Delaware, Maryland and Virginia. It possibly extends south to Georgia. States/Provinces: DE, GA?, MD:S4, NC?, NJ, SC?, VA. Federal Lands: NPS (Colonial); USFWS (Back Bay, Chesapeake Marshlands). CONSERVATION STATUS Rank: GNR (17-Apr-2000). Reasons: Information not available. CLASSIFICATION INFORMATION Status: Standard. Confidence: 2 - Moderate. Comments: The halinity range of this vegetation is uncertain, but the relatively higher species diversity suggests lower halinity than that characteristic of Spartina patens - Distichlis spicata - (Juncus gerardii) Herbaceous Vegetation (CEGL006006). It is unclear whether stands attributed to this type at North Landing River and Back Bay National Wildlife Refuge represent the same vegetation. The prevailing tidal influence in these areas is generally wind-generated rather than strictly lunar (Coulling 2002). Similar Associations: • Schoenoplectus americanus - (Spartina patens) - Typha spp. Herbaceous Vegetation (CEGL008476) • Schoenoplectus pungens Tidal Herbaceous Vegetation (CEGL004188) Related Concepts: • Schoenoplectus americanus - Spartina patens Tidal Herbaceous Vegetation (Bartgis 1986) = • Spartina patens - Schoenoplectus americanus Tidal Herbaceous Vegetation (VDNH 2003) = SOURCES Description Authors: S.L. Neid, mod. L.A. Sneddon. References: Bartgis 1986, Bowman 2000, Coulling 2002, Eastern Ecology Working Group n.d., Fleming 2001, Fleming et al. 2001, Harrison 2001, Harrison 2004, VDNH 2003. 292
USGS-NPS Vegetation Mapping Program Colonial National Historical Park Figure I28. Tidal Oligohaline Marsh (Saltmeadow Cordgrass - Olney Three-Square Low Interior Marsh Type) (plot COLO.115) at Colonial National Historical Park. October 2001. NAD 1983 / UTM easting 343779, northing 4119291. Figure I29. Tidal Oligohaline Marsh (Saltmeadow Cordgrass - Olney Three- Square Low Interior Marsh Type) (plot COLO.115) at Colonial National Historical Park. July 2004. NAD 1983 / UTM easting 343779, northing 4119291. 293
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Vegetation Classification and Mapping Project Report - USGS

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