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A.961 | EcoArt 2002
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Name: A.961 Reference: EcoArt 2002 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.2588.A961 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Mar-2005
	status: accepted Community's Parent: III.B.2.N.d This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: SYMPHORICARPOS OCCIDENTALIS TEMPORARILY FLOODED SHRUBLAND ALLIANCE   Code: A.961   Common: Western Snowberry Temporarily Flooded Shrubland Alliance (convergence) and Synonyms: (undetermined) Symphoricarpos occidentalis Temporarily Flooded Shrubland Alliance