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CEGL006080 Amaranthus cannabinus Tidal Marsh
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Tidal-marsh Amaranth Tidal Marsh
Colloquial Name: Amaranth Tidal Marsh
Hierarchy Level: Association
Type Concept: This brackish marsh vegetation occupies a mid-tidal position on sandy intertidal rivershores along the north and mid-Atlantic Coast where floodwaters are oligohaline to mesohaline. Amaranthus cannabinus is dominant and can be mixed with Bidens spp., Polygonum punctatum, Sagittaria latifolia, Zizania aquatica, and Schoenoplectus pungens. This association occurs on wave- and ice-scoured riverbanks or other brackish marsh habitat with coarse substrate and where tidal flooding freely drains. Species composition and abundance can change dramatically from year to year.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is dominated by annuals whereas ~Spartina alterniflora - Polygonum punctatum - Amaranthus cannabinus Salt Marsh (CEGL006418)$$ contains perennials with Spartina alterniflora as a strong component. However, the types may reflect seasonal variation within freshwater tidal marsh systems and be similar enough to warrant merging.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The community is predominantly composed of annual species, especially Amaranthus cannabinus. Associated species include, but are not limited to, Bidens connata, Bidens laevis, Bidens cernua, Polygonum punctatum, Sagittaria latifolia, Zizania aquatica, and Schoenoplectus pungens. Other species that may occur infrequently include Polygonum arifolium, Polygonum sagittatum, Acorus calamus, Pilea pumila, and Leersia oryzoides. As a community with relatively high degree of natural disturbance and predominance of annuals, species composition and abundance can change dramatically from year to year.
Dynamics: This association occurs on wave- and ice-scoured mid-tidal shores of rivers and tidal creeks. Having a strong component of annuals, the species composition and abundance can change dramatically from year to year.
Environmental Description: This association occurs along mid-tidal sections of wave- and ice-scoured riverbanks or on eroded remnants of dikes and natural levees. It occurs where tidal flood water is oligohaline to mesohaline. The association occasionally occurs in freshwater tidal backmarsh settings in local patches where substrate is firm and gravelly. Substrate is generally coarse, but ranges from fine sand to gravel to rocky shores. There is regular inundation by tides, but flood waters freely drain.
Geographic Range: This association occurs along tidal rivers from Maine to Virginia.
Nations: US
States/Provinces: CT, DE, MA, MD, ME, NJ, NY, RI
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689238
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G3G5
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.C Shrub & Herb Wetland Subclass | S44 | 2.C |
| Formation | 2.C.4 Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland Formation | F013 | 2.C.4 |
| Division | 2.C.4.Ne Atlantic & Gulf Coastal Marsh, Wet Meadow & Shrubland Division | D322 | 2.C.4.Ne |
| Macrogroup | 2.C.4.Ne.1 Annual Wild Rice - Saltmeadow Cordgrass - Pickerelweed Fresh-Oligohaline Tidal Marsh Macrogroup | M066 | 2.C.4.Ne.1 |
| Group | 2.C.4.Ne.1.c <i>Zizania aquatica - Spartina patens - Amaranthus cannabinus</i> Freshwater Tidal Marsh Group | G914 | 2.C.4.Ne.1.c |
| Alliance | A4017 Green Arrow-arum - Pickerelweed - Arrowhead species Oligohaline Tidal Marsh Alliance | A4017 | 2.C.4.Ne.1.c |
| Association | CEGL006080 Tidal-marsh Amaranth Tidal Marsh | CEGL006080 | 2.C.4.Ne.1.c |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Amaranthus cannabinus Herbaceous Vegetation [Provisional] (Bartgis 1986)
= Amaranthus cannabinus tidally-flooded vegetation (Metzler and Barrett 2006)
? FW Tidal Marsh (Rawinski 1984a) [formerly Southern New England FW Tidal.]
= Amaranthus cannabinus tidally-flooded vegetation (Metzler and Barrett 2006)
? FW Tidal Marsh (Rawinski 1984a) [formerly Southern New England FW Tidal.]
- Bartgis, R. 1986. Natural community descriptions. Unpublished draft. Maryland Natural Heritage Program, Maryland Department of Natural Resources, Annapolis.
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