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Populus tremuloides / Symphoricarpos occidentalis Forest | NatureServe Biotics 2019
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Name: Populus tremuloides / Symphoricarpos occidentalis Forest
Reference: NatureServe Biotics 2019
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, Thalictrum occidentale</i>, and <i>Eurybia conspicua</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> Riparian Forest (CEGL000574)$$ on moister (downslope) positions. 
Accession Code: urn:lsid:vegbank.org:commConcept:34502-{630E127D-8D11-46AB-A739-B200CEBC6D64}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 03-Mar-2004 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.731499
  Code: CEGL005848
  Translated: Quaking Aspen / Western Snowberry Forest
  Scientific: Populus tremuloides / Symphoricarpos occidentalis Forest
(convergence) and Synonyms:
(similar) Populus tremuloides / Symphoricarpos occidentalis Forest