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Symphoricarpos occidentalis Temporarily Flooded Shrubland Alliance | Western Ecology Working Group of...
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Name: Symphoricarpos occidentalis Temporarily Flooded Shrubland Alliance Reference: Western Ecology Working Group of... Description: This alliance is found in the northern Great Plains in mesic swales, depressions, ravines and floodplains. Some sites experience intermittent and brief flooding. The soils are fertile and well-drained to imperfectly drained silts and loams. The upper soil horizon is usually deep, although a thin layer of sand may be present if the site has been recently flooded This alliance is dominated by shrubs approximately 1 m tall. Shrub cover is typically greater than 50%, and in places it can approach 100%. These shrubs form dense clumps that exclude most other species. Symphoricarpos occidentalis is the most common shrub. Rhus aromatica and Prunus virginiana can be locally abundant, and both can grow to 2-3 m in places. Rarely, scattered small trees are present. These are most often Fraxinus americana or Populus deltoides. Herbaceous species and smaller shrubs are most abundant at the edge of stands of this alliance and in gaps between the taller shrubs where the shading is less complete. Rosa woodsii is a typical smaller shrub. Achillea millefolium, Artemisia ludoviciana, Galium boreale, and Pascopyrum smithii are common herbaceous species. Woody vines sometimes occur, most commonly Parthenocissus vitacea. Symphoricarpos occidentalis shrublands often have a significant component of exotic species, especially where grazing has been intense Bromus inermis, Cirsium arvense, and Poa pratensis are the most abundant of these exotics. Overgrazing of prairies can lead to the expansion of degraded forms of this alliance.  Accession Code: VB.CC.19631.SYMPHORICARPOSO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Symphoricarpos occidentalis Temporarily Flooded Shrubland Alliance   Translated: Western Snowberry Temporarily Flooded Shrubland Alliance   UID: HIGHER_CLASS_UNIT.2.126416 NatureServe Explorer   Code: A.961