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Populus tremuloides / Amelanchier alnifolia - Symphoricarpos oreophilus / Bromus carinatus Forest | Western Ecology Working Group of...
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Name: Populus tremuloides / Amelanchier alnifolia - Symphoricarpos oreophilus / Bromus carinatus Forest Reference: Western Ecology Working Group of... Description: This mesic aspen forest is most likely a grazing-induced, less rich version of similar associations. It is a mesic forest that occupies low to moderate elevations, from 1965 to 2400 m (6448-7800 feet). It occurs on shallow to moderately steep slopes on all exposures, often on sedimentary sand- or claystone-derived soils. Populus tremuloides is the almost exclusive canopy occupant with 10-80% cover, average about 50%. Conifers may be present in low amounts (<1%). The undergrowth is essentially three strata: tall shrubs, low shrubs, and herbs. Amelanchier alnifolia and Prunus virginiana are the most common and abundant tall-shrub species. Symphoricarpos oreophilus usually dominates the lower shrub layer. The herbaceous undergrowth of this structurally complex community has been altered considerably by grazing. Heavy persistent grazing has reduced forbs and increased less palatable grass species. The herbaceous portion of the undergrowth is a highly variable group of species. Most abundant are tall grass species such as Elymus glaucus, Bromus carinatus, and Elymus trachycaulus (= Agropyron trachycaulum). Poa pratensis and Poa wheeleri can also be present in significant amounts (20-40% cover). A wide variety of forbs can occur, but the tall and low forbs that serve as indicators for other community types are never abundant. Most common are Thalictrum fendleri, Geranium viscosissimum, Osmorhiza berteroi (= Osmorhiza chilensis), Chamerion angustifolium, Helianthella uniflora, Lupinus spp., Lathyrus spp., and Vicia americana.  Accession Code: VB.CC.26574.POPULUSTREMULOI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Populus tremuloides Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Quaking Aspen / Saskatoon Serviceberry - Mountain Snowberry / California Brome Forest   UID: ELEMENT_GLOBAL.2.689306 NatureServe Explorer   Code: CEGL000566   Scientific: Populus tremuloides / Amelanchier alnifolia - Symphoricarpos oreophilus / Bromus carinatus Forest (convergence) and Synonyms: (undetermined) Populus tremuloides / Amelanchier alnifolia - Symphoricarpos oreophilus / Bromus carinatus Forest