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CEGL002220 Carex atherodes Wet Meadow

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Wheat Sedge Wet Meadow

Colloquial Name: Wheat Sedge Wet Meadow

Hierarchy Level:  Association

Type Concept: This wheat sedge wet meadow occurs in the northern tallgrass prairie region of the United States and Canada. Stands occur on lowland sites that have standing water for several weeks each year. These sites are typically in depressions or basins but can be along streams and rivers. The water may be fresh or moderately saline. Soils can be mineral but mucks often form through the buildup of organic material. Vegetation cover is usually high but can vary in wet or dry years. Dominant species are herbaceous and typically between 0.5 and 1 m tall. Forb diversity is moderate to high. Carex atherodes may form essentially monotypic stands or just be the dominant species. Common associated species include Alisma triviale, Symphyotrichum lanceolatum, Eleocharis palustris, Glyceria grandis (in drier stands), Mentha arvensis, Phalaris arundinacea, Polygonum amphibium, Scolochloa festucacea, Sium suave, and Sparganium eurycarpum. Shrubs, including Salix spp., can invade this community, especially in the eastern portions of its range.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: See Dix and Smeins (1967) for a discussion of the hydrology of this type, which borders on temporarily vs. seasonally flooded. See also Stewart and Kantrud (1972, including photos on pp. 34-35). Brotherson (1969) performed an ordination of pothole and drainage communities on a prairie in northwestern Iowa and found a community with 55% cover by Carex atherodes. The only other species with more than 4% cover was Polygonum amphibium, at 30%. Bolboschoenus fluviatilis, Calamagrostis canadensis, Carex lasiocarpa, Spartina pectinata, and Carex aquatilis all had between 1 and 3% cover. This community occurred as a narrow band around potholes or sometimes in wide patches.

The relationship of this community and Scolochloa festucacea Herbaceous Vegetation needs to better defined. Carex atherodes tends to be on non-saline sites while Scolochloa festucacea tends to do better on mildly to moderately saline sites (Walker and Coupland 1970). However, the two can co-occur or codominate on mildly saline sites. Carex atherodes tends to occur on drier sites (Smith 1973).

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: Vegetation cover is usually high but can vary in wet or dry years. Dominant species are herbaceous and typically between 0.5 and 1 m tall. Forb diversity is moderate to high (MNNHP 1993). Carex atherodes can form almost monotypic stands or it may be dominant. Common associated species are Alisma triviale, Symphyotrichum lanceolatum (= Aster lanceolatus), Eleocharis palustris, Glyceria grandis (in drier stands), Mentha arvensis, Phalaris arundinacea, Polygonum amphibium, Scolochloa festucacea (especially on mildly saline stands), Sium suave, and Sparganium eurycarpum. Shrubs, including Salix spp., can invade this community, especially in the eastern portions of its range. Beckmannia syzigachne often is an indicator of disturbance (Walker and Coupland 1970).

Dynamics:  Fire may have been important to prevent the invasion of this community by woody species, especially in the eastern part of its range (MNNHP 1993).

Environmental Description:  This community is found on lowland sites that have standing water for several weeks each year. These sites are typically in depressions or basins but can be along streams and rivers (MNNHP 1993). The water may be fresh or mildly saline. Soils can be mineral but mucks often form through the buildup of organic material (Looman 1982).

Geographic Range: This awned sedge wet meadow occurs in the northern tallgrass prairie region of the United States and Canada, from Minnesota and Iowa, north and west into the Dakotas, Manitoba and perhaps other provinces.

Nations: CA,US

States/Provinces:  AB, CO, IA, MB, MN, MT, ND, SD, WY




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G3G5

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Carex atherodes Herbaceous Vegetation (Faber-Langendoen 2001)
= Carex atherodes Herbaceous Vegetation (Reid et al. 2004)
= Carex atherodes association (Looman 1982)
= Groups 9, 10, 17, 25, and 26 (Walker and Coupland 1970)
< Meadows (Dix and Smeins 1967)
>< Seasonal ponds and lakes, fresh, central shallow marsh phase (Stewart and Kantrud 1971)
>< Seasonal ponds and lakes, slightly brackish, central shallow marsh phase (Stewart and Kantrud 1971)

Concept Author(s): D. Faber-Langendoen (2001)

Author of Description: J. Drake and D. Faber-Langendoen

Acknowledgements: No Data Available

Version Date: 05-07-96

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  • Minnesota DNR [Minnesota Department of Natural Resources]. 2003-2005a. Field guide to the native plant communities of Minnesota. Three volumes: The Laurentian Mixed Forest Province (2003), The Eastern Broadleaf Forest Province (2005c), The Prairie Parkland and Tallgrass Aspen Parklands provinces (2005b). Ecological Land Classification Program, Minnesota County Biological Survey, and Natural Heritage and Nongame Research Program. Minnesota Department of Natural Resources, St. Paul.
  • Minnesota DNR [Minnesota Department of Natural Resources]. 2005b. Field guide to the native plant communities of Minnesota: The Prairie Parkland and Tallgrass Aspen Parklands provinces. Ecological Land Classification Program, Minnesota County Biological Survey, and Natural Heritage and Nongame Research Program. Minnesota Department of Natural Resources, St. Paul.
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  • SDNHP [South Dakota Natural Heritage Program]. 2018. Unpublished data. South Dakota Natural Heritage Program, Pierre, SD.
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  • Stewart, R. E., and H. A. Kantrud. 1972. Vegetation of prairie potholes, North Dakota, in relation to quality of water and other environmental factors. USDI Geologic Survey Professional Paper 585-d. 36 pp.
  • WNDD [Wyoming Natural Diversity Database]. No date. Unpublished data on file. Wyoming Natural Diversity Database, University of Wyoming, Laramie, WY.
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