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CEGL006048 Ceratophyllum demersum - Vallisneria americana - Najas spp. Tidal Marsh
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Coon''s-tail - American Eel-grass - Waternymph species Tidal Marsh
Colloquial Name: Mixed Freshwater Subtidal Marsh
Hierarchy Level: Association
Type Concept: This association comprises mixed freshwater subtidal aquatic beds of the mid-Atlantic coast. It occurs in fresh reaches of upper bays and tributaries within estuarine systems. Species composition is variable and includes Vallisneria americana, Ceratophyllum demersum, Heteranthera dubia, Elodea canadensis, Najas guadalupensis, Najas gracillima, Najas minor, Potamogeton pusillus, Stuckenia pectinata, and others. There is often a strong component of exotic species that can be locally or extensively dominant, including Myriophyllum spicatum, Hydrilla verticillata, and Potamogeton crispus. This association can have dramatic seasonal fluctuations in species composition and biomass.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is similar to ~Stuckenia pectinata - Potamogeton perfoliatus - (Zannichellia palustris) Tidal Marsh (CEGL006027)$$ in environment and has some overlap in species composition. It is distinguished by its higher species diversity (including the presence of several exotics) and the lack of dominance by Potamogeton species.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Species composition is variable and includes Vallisneria americana, Ceratophyllum demersum, Heteranthera dubia, Elodea canadensis, Najas guadalupensis, Najas gracillima, Najas minor, Potamogeton pusillus, Stuckenia pectinata (= Potamogeton pectinatus), and others. There is often a strong component of exotic species that can be locally or extensively dominant, including Myriophyllum spicatum, Hydrilla verticillata, and Potamogeton crispus. This association can have dramatic seasonal fluctuations in species composition and biomass.
Dynamics: This association occurs upstream from, but also intergrades with, fresh/brackish associations.
Environmental Description: This type occurs in fresh reaches of upper bays and tributaries within estuarine systems.
Geographic Range: The geographic range of this type is centered in the Chesapeake Bay estuary, it but likely occurs in other locations.
Nations: US
States/Provinces: DC, DE, MA, MD, ME, NJ, NY, PA, RI, VA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.687618
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 5 Aquatic Vegetation Class | C05 | 5 |
| Subclass | 5.B Freshwater Aquatic Vegetation Subclass | S13 | 5.B |
| Formation | 5.B.2 Temperate to Polar Freshwater Aquatic Vegetation Formation | F057 | 5.B.2 |
| Division | 5.B.2.Na North American Freshwater Aquatic Vegetation Division | D049 | 5.B.2.Na |
| Macrogroup | 5.B.2.Na.1 Hornwort species - Pond-lily species - Pondweed species Eastern North American Freshwater Aquatic Vegetation Macrogroup | M108 | 5.B.2.Na.1 |
| Group | 5.B.2.Na.1.b <i>Stuckenia pectinata - Zannichellia palustris - Ceratophyllum demersum</i> Freshwater Subtidal Marsh Group | G924 | 5.B.2.Na.1.b |
| Alliance | A4486 <i>Stuckenia pectinata - Zannichellia palustris - Ceratophyllum demersum</i> Northern Freshwater Subtidal Marsh Alliance | A4486 | 5.B.2.Na.1.b |
| Association | CEGL006048 Coon''s-tail - American Eel-grass - Waternymph species Tidal Marsh | CEGL006048 | 5.B.2.Na.1.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Myriophyllum spicatum - Vallisneria americana - Stuckenia pectinata Permanently Flooded - Tidal Herbaceous Vegetation (Coulling 2002)
? Freshwater Mixed Community (Moore et al. 2000)
? Freshwater Mixed Community (Moore et al. 2000)
- Coulling, P. P. 2002. A preliminary classification of tidal marsh, shrub swamp, and hardwood swamp vegetation and assorted non-tidal, chiefly non-maritime, herbaceous wetland communities of the Virginia Coastal Plain. October 2002. Virginia Department of Conservation and Recreation, Division of Natural Heritage. Natural Heritage Technical Report 02-18. 30 pp.
- Eastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boston, MA.
- Fleming, G. P. 2001a. Community types of Coastal Plain calcareous ravines in Virginia. Preliminary analysis and classification. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond, VA. 4 pp.
- Fleming, G. P., K. D. Patterson, and K. Taverna. 2017. The natural communities of Virginia: A classification of ecological community groups and community types. Third approximation. Version 3.0. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond, VA. [http://www.dcr.virginia.gov/natural-heritage/natural-communities/]
- Fleming, G. P., K. Taverna, and P. P. Coulling. 2007b. Vegetation classification for the National Capitol Region parks, eastern region. Regional (VA-MD-DC) analysis prepared for NatureServe and USGS-NPS Vegetation Mapping Program, March 2007. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond.
- Harrison, J. W. 2011. The natural communities of Maryland: 2011 working list of ecological community groups and community types. Unpublished report. Maryland Department of Natural Resources, Wildlife and Heritage Service, Natural Heritage Program, Annapolis. 33 pp.
- Harrison, J. W., compiler. 2004. Classification of vegetation communities of Maryland: First iteration. A subset of the International Classification of Ecological Communities: Terrestrial Vegetation of the United States, NatureServe. Maryland Natural Heritage Program, Maryland Department of Natural Resources, Annapolis. 243 pp.
- Moore, K. A., D. J. Wilcox, and R. J. Orth. 2000. Analysis of the abundance of submersed aquatic vegetation communities in the Chesapeake Bay. Estuaries 23:115-127.
- Orth, R. J., and K. A. Moore. 1988. Distribution of Zostera marina L. and Ruppia maritima L. sensu lato along depth gradients in the lower Chesapeake Bay, USA. Aquatic Botany 32:291-305.