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Alopecurus pratensis Western Ruderal Wet Meadow | NatureServe Biotics 2019
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Name: Alopecurus pratensis Western Ruderal Wet Meadow Reference: NatureServe Biotics 2019 Description: This community is currently only described from Malheur National Wildlife Refuge. It is seasonally moist to wet meadow, including flood-irrigated hay meadow, on floodplain flats and depressions. <i>Alopecurus pratensis</i> is an exotic, invasive grass that is an extremely important forage species throughout the region. Soils are silty clay loams with pH ranging from 4.5 to 8.5. Slightly over 50 species are present in sampled stands, but most occur with low frequency and cover. <i>Alopecurus pratensis</i> is the primary species with an average cover of 62%, but it can range up to 95%. <i>Juncus arcticus ssp. littoralis</i> and <i>Carex aquatilis</i> are the second most important components, occurring at modest frequency but low cover. Weedy native increasers such as <i>Potentilla glandulosa, Potentilla gracilis</i>, and exotic forage species such as <i>Poa pratensis, Phleum pratense</i>, and <i>Trifolium pratense</i> indicate a mesic phase with a history of pasture improvements and grazing. Hydric components include <i>Juncus arcticus ssp. littoralis, Carex aquatilis, Carex pellita, Eleocharis palustris, Mimulus guttatus</i>, and <i>Polygonum amphibium var. emersum</i>, but these are scarce. An alkaline component is indicated by <i>Carex nebrascensis, Leymus triticoides</i>, and <i>Poa secunda</i>. Similarity in landform position and species composition suggests that <i>Alopecurus pratensis</i> has successfully invaded and replaced phases of ~<i>Carex praegracilis</i> Wet Meadow (CEGL002660)$$, with some plots containing up to 29% cover of <i>Carex praegracilis</i>. When compared to the highly diverse <i>Carex praegracilis</i> association, the lower species diversity of the <i>Alopecurus pratensis</i> association may result from its competitive superiority over many of the species of the former community that were simply crowded out. It remains to be seen if its formidable competitive abilities will enable it to overwhelm other wet meadow vegetation types.  Accession Code: urn:lsid:vegbank.org:commConcept:33972-{BE1053F2-3D65-4159-9BC4-28BD62DC20C6} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 19-Feb-2013 to: ongoing
	status: accepted Community's Parent: Poa pratensis - Agrostis gigantea - Agrostis stolonifera Ruderal Marsh Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.885978 NatureServe Explorer   Code: CEGL005209   Translated: Meadow Foxtail Western Ruderal Wet Meadow   Scientific: Alopecurus pratensis Western Ruderal Wet Meadow (convergence) and Synonyms: (similar) Alopecurus pratensis Western Herbaceous Vegetation