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Vallisneria americana - (Heteranthera dubia) Riverine Aquatic Vegetation
Translated Name: American Eel-grass - (Grassleaf Mud-plantain) Riverine Aquatic Vegetation
Common Name: Eel-grass River Channel
Unique Identifier: CEGL004333
Classification Approach: International Vegetation Classification (IVC)
Summary: Stands of this association consist of aquatic vegetation in rivers of the Piedmont, Central Appalachians, Southern Appalachians, and possibly the Atlantic Coastal Plain. This rooted aquatic vegetation is documented from the channels of the Potomac, Shenandoah, James, Clinch and New rivers. Vallisneria americana and Heteranthera dubia (= Zosterella dubia) are the dominant species in variable proportions. The extent and distribution of this vegetation type and its alliance are poorly understood. Associated species recorded from various sites include Elodea canadensis, Elodea nuttallii, Myriophyllum spicatum, Najas gracillima, Lemna minor, Justicia americana, Potamogeton foliosus, Potamogeton illinoensis, Potamogeton crispus, Stuckenia pectinata (= Potamogeton pectinatus), and Potamogeton nodosus.



Classification

Classification Confidence: Low

Vegetation Hierarchy
Class 5 - Aquatic Vegetation
Subclass 5.B - Freshwater Aquatic Vegetation
Formation 5.B.2 - Temperate to Polar Freshwater Aquatic Vegetation
Division 5.B.2.Na - North American Freshwater Aquatic Vegetation
Macrogroup Eastern North American Freshwater Aquatic Vegetation
Group Eastern North American Freshwater Aquatic Vegetation
Alliance American Eel-grass Aquatic Vegetation

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.



Related Concepts from Other Classifications

Related Subnational Community Units
These data are subject to substantial ongoing revision and may be out of date for some states.
In the U.S., contact the state Heritage Program for the most complete and up-to-date information at: http://www.natureserve.org/natureserve-network.
Information from programs in other jurisdictions will be posted when they are made available.
Subnation Concept Name Relationship to Standard Confidence Reference
Alabama Vallisneria americana - (Heteranthera dubia) Riverine Herbaceous Vegetation Equivalent Certain Schotz pers. comm.
Tennessee Vallisneria americana - (Heteranthera dubia) Riverine Herbaceous Vegetation Equivalent Certain TDNH unpubl. data


Other Related Concepts
Related Concept Name: Riverine Aquatic Bed
Relationship: B - Broader
Reference: Fleming, G. P., P. P. Coulling, D. P. Walton, K. M. McCoy, and M. R. Parrish. 2001. The natural communities of Virginia: Classification of ecological community groups. First approximation. Natural Heritage Technical Report 01-1. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond, VA. 76 pp.
Relationship: B - Broader
Reference: 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.
Related Concept Name: Rocky Bar and Shore
Relationship: B - Broader
Reference: Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina. Third approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh. 325 pp.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES202.036 Cumberland Riverscour


NatureServe Conservation Status
Global Status: G3G4 (03Oct2001)
Rounded Global Status: G3 - Vulnerable
Reasons: The rank was formerly G3G5, and changing it to G3G4 makes it clearer where the ambiguity lies. It is unlikely that this is so secure and abundant as to warrant a G5 rank in any case. It would be primarily threatened by hydrologic alterations (e.g., impoundments, water removals).

Distribution
Color legend for Distribution Map
United States Distribution: ALpotentially occurs, GApotentially occurs, KY, MD, MSpotentially occurs, NC, SCpotentially occurs, TN, VA, WV
Global Distribution: United States
Global Range: This is primarily a Southern and Central Appalachian type, ranging from Maryland, West Virginia, Virginia and Kentucky south possibly to South Carolina. It is doubtfully attributed to the Mid-Atlantic Coastal Plain.

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Hot Continental Division
Province Name: Eastern Broadleaf Forest (Oceanic) Province
Province Code: 221 Occurrence Status: Confident or certain
Section Name: Northern Cumberland Plateau Section
Section Code: 221H Occurrence Status: Confident or certain
Division Name: Subtropical Division
Province Name: Southeastern Mixed Forest Province
Province Code: 231 Occurrence Status: Confident or certain
Section Name: Southern Appalachian Piedmont Section
Section Code: 231A Occurrence Status: Confident or certain
Province Name: Outer Coastal Plain Mixed Forest Province
Province Code: 232 Occurrence Status: Confident or certain
Division Name: Hot Continental Regime Mountains
Province Name: Central Appalachian Broadleaf Forest - Coniferous Forest - Meadow Province
Province Code: M221 Occurrence Status: Confident or certain
Section Name: Northern Ridge and Valley Section
Section Code: M221A Occurrence Status: Predicted or probable
Section Name: Allegheny Mountains Section
Section Code: M221B Occurrence Status: Predicted or probable
Section Name: Blue Ridge Mountains Section
Section Code: M221D Occurrence Status: Predicted or probable


Vegetation

Vegetation Summary: Stands of this association consist of aquatic vegetation dominated by Vallisneria americana and Heteranthera dubia (= Zosterella dubia) in variable proportions. Associated species recorded from various sites include Elodea canadensis, Elodea nuttallii, Myriophyllum spicatum, Najas gracillima, Lemna minor, Justicia americana, Potamogeton foliosus, Potamogeton illinoensis, Potamogeton crispus, Stuckenia pectinata (= Potamogeton pectinatus), and Potamogeton nodosus.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Heteranthera dubia G3 Aquatic herb Floating aquatic  
 
 
Myriophyllum spicatum G3 Aquatic herb Submerged aquatic      
 
 
Vallisneria americana G3 Aquatic herb Submerged aquatic  
 
 


Environmental Setting

Wetland Indicator: Y
Environmental Summary: Stands of this association are found in shallow waters of large rivers. The extent and distribution of this vegetation type and its alliance are poorly understood. It is found in alluvial rivers of the Piedmont, Central Appalachians, Southern Appalachians, and possibly the Mid-Atlantic Coastal Plain. Such vegetation could possibly occur in the East Gulf Coastal Plain states of Mississippi, Alabama, and Georgia, but no specific observations or data are available to support this possibility.


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): A.S. Weakley, mod. G.P. Fleming
Element Description Edition Date: 03Oct2006
Element Description Author(s): A.S. Weakley and G.P. Fleming
NatureServe Conservation Status Factors Edition Date: 03Oct2001
NatureServe Conservation Status Factors Author(s): M. Pyne

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Campbell, J. J. N., A. C. Risk, V. A. Andrews, B. Palmer-Ball, and J. R. MacGregor. 1990. Cooperative inventory of endangered, threatened, sensitive, and rare species, Daniel Boone National Forest, Stearns Ranger District. USDA Forest Service. 170 pp.

  • Fleming, G. P., P. P. Coulling, D. P. Walton, K. M. McCoy, and M. R. Parrish. 2001. The natural communities of Virginia: Classification of ecological community groups. First approximation. Natural Heritage Technical Report 01-1. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond, VA. 76 pp.

  • Fleming, G. P., and K. D. Patterson. 2011a. Natural communities of Virginia: Ecological groups and community types. Natural Heritage Technical Report 11-07. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond. 34 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.

  • Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina. Third approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh. 325 pp.

  • Schotz, Al. Personal communication. Community Ecologist. Alabama Natural Heritage Program. Huntingdon College, Massey Hall, 1500 East Fairview Avenue, Montgomery, AL 36106-2148.

  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.

  • TDNH [Tennessee Division of Natural Heritage]. No date. Unpublished data. Tennessee Division of Natural Heritage, Nashville, TN.


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