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Panicum hemitomon - Juncus spp. Coastal Plain Lakeshore Marsh
Translated Name: Maidencane - Rush species Coastal Plain Lakeshore Marsh
Common Name: Mid-Atlantic Coastal Plain Lakeshore Marsh
Unique Identifier: CEGL004307
Classification Approach: International Vegetation Classification (IVC)
Summary: This association occurs on the shorelines of Coastal Plain lakes, as emergent or drawdown vegetation. The moderate to dense herbaceous vegetation is fairly diverse. Panicum hemitomon and a variety of other herbaceous species are abundant; Juncus militaris, Juncus effusus, Schoenoplectus americanus (= Scirpus americanus), Xyris smalliana, and Eriocaulon aquaticum may be abundant or dominant. Decodon verticillatus, emergent shrubs, or sparse Taxodium ascendens may also be present.



Classification

Classification Confidence: Moderate
Classification Comments: More study is needed to clarify the variability within this type and to clarify its structure. Though sparse cypress trees may be present, it appears to best be described as herbaceous vegetation. However, it is closely related to other lake shoreline communities that are treated as woodlands. This association is meant to cover moderately diverse shoreline marsh communities, such as those at Lake Phelps in North Carolina. The more depauperate Panicum hemitomon beds with irregular cypress canopies in North Carolina are included in Taxodium distichum - Taxodium ascendens / Panicum hemitomon Swamp Woodland (CEGL004466). The more diverse calcareous shoreline community of Lake Waccamaw is treated as Taxodium distichum - Taxodium ascendens / Panicum hemitomon - Sclerolepis uniflora Swamp Woodland (CEGL004465).

Vegetation Hierarchy
Class 2 - Shrub & Herb Vegetation
Subclass 2.C - Shrub & Herb Wetland
Formation 2.C.4 - Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland
Division 2.C.4.Ne - Atlantic & Gulf Coastal Marsh, Wet Meadow & Shrubland
Macrogroup Atlantic & Gulf Coastal Plain Wet Prairie & Marsh
Group Atlantic & Gulf Coastal Plain River & Basin Freshwater Marsh
Alliance Southeastern Basin Marsh

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

Similar Associations
Unique Identifier Name
CEGL004465 Taxodium distichum - Taxodium ascendens / Panicum hemitomon - Sclerolepis uniflora Swamp Woodland
CEGL004466 Taxodium distichum - Taxodium ascendens / Panicum hemitomon Swamp Woodland



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
North Carolina Natural Lake Shoreline Marsh (Typic Subtype) Equivalent Certain Schafale 2012



Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES203.044 Southeastern Coastal Plain Natural Lakeshore


NatureServe Conservation Status
Global Status: G1 (20Feb2009)
Rounded Global Status: G1 - Critically Imperiled
Reasons: This association is extremely rare. Only a handful of examples are known, and no more are likely to be found. While some examples are on public lands, climate change and alteration of lakewater balance remain threats.

Distribution
Color legend for Distribution Map
United States Distribution: NC
Global Distribution: United States
Global Range: This association is known only from northeastern North Carolina.

Vegetation

Vegetation Summary: This moderate to dense emergent herbaceous vegetation is dominated by Panicum hemitomon and a variety of other herbaceous species. Juncus militaris, Juncus effusus, Schoenoplectus americanus (= Scirpus americanus), Xyris smalliana, and Eriocaulon aquaticum may be abundant or dominant. Decodon verticillatus, emergent shrubs, or sparse Taxodium ascendens may also be present. Other species include Eleocharis cellulosa, Myriophyllum tenellum, Luziola fluitans, Sagittaria subulata, Hydrocotyle umbellata, Sacciolepis striata, and Cyperus spp.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Juncus effusus G1 Graminoid Herb (field)  
 
 
Juncus militaris G1 Graminoid Herb (field)  
 
 
Panicum hemitomon G1 Graminoid Herb (field)  
 
 


Environmental Setting

Wetland Indicator: Y
Environmental Summary: This association occurs in shallow water or drawdown zones along the shorelines of large natural lakes in the mid-Atlantic Coastal Plain.


Dynamic Processes

Dynamics: Dynamic processes are not well-known. This community is subject to wave action and to seasonal fluctuations in water levels. It may respond to longer term rainfall cycles. The amount of Taxodium may depend on past logging and on rare regeneration opportunities during extreme droughts.


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): M.P. Schafale
Element Description Edition Date: 20Feb2009
Element Description Author(s): M.P. Schafale
NatureServe Conservation Status Factors Edition Date: 20Feb2009
NatureServe Conservation Status Factors Author(s): M.P. Schafale

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


References
  • Schafale, M. P. 2012. Classification of the natural communities of North Carolina, 4th Approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh.

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


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Data last updated: November 2016