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Populus tremuloides / Symphoricarpos occidentalis Forest | Western Ecology Working Group of...
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Name: Populus tremuloides / Symphoricarpos occidentalis Forest Reference: Western Ecology Working Group of... Description: This forest association is reported from Waterton Lakes National Park in Alberta, Canada. It occupies upland terraced slopes with a gentle to moderate grade. The association is most common at midslope or lower. Aspects vary from southeasterly to easterly. The association was documented at elevations ranging from 1320-1360 m (4330-4461 feet), though it may occasionally be present above or below this narrow band. Parent material is glacio-fluvial, and soils are well-developed. The soil is typically well-drained to moderately well-drained with a silty clay loam texture. Ground cover is primarily litter, but wood and small rock may account for 5-10%. <i>Populus tremuloides</i> forms a uniform layer of trees 5-10 m tall in the upper canopy, with average canopy cover of 60%. <i>Amelanchier alnifolia</i> is the only tall shrub present, but is not abundant. Short-shrub cover ranges from 40-60% and is dominated by <i>Symphoricarpos occidentalis</i>. Average canopy cover for this species is 33%. <i>Spiraea betulifolia</i> and <i>Prunus virginiana</i> are usually well-represented. Cover of herbaceous species is quite variable, ranging from 30-80%, and species diversity is relatively low. <i>Prosartes trachycarpa (= Disporum trachycarpum), Thalictrum occidentale</i>, and <i>Eurybia conspicua (= Aster conspicuus)</i> had 100% constancy in sampled plots, with cover for each species between 8% and 13%. Other herbaceous species that may be present in this association include <i>Chamerion angustifolium, Actaea rubra</i>, and <i>Galium boreale</i>. This type frequently grades to <i>~Populus tremuloides / Calamagrostis canadensis</i> Forest (CEGL000574)$$ on moister (downslope) positions.  Accession Code: VB.CC.31136.CEGL005848 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: Provisional This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.731499 NatureServe Explorer   Translated: Quaking Aspen / Western Snowberry Forest   Scientific: Populus tremuloides / Symphoricarpos occidentalis Forest   Code: CEGL005848