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Populus balsamifera ssp. trichocarpa - Populus tremuloides - Conifer / Calamagrostis canadensis Forest | Western Ecology Working Group of...
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Name: Populus balsamifera ssp. trichocarpa - Populus tremuloides - Conifer / Calamagrostis canadensis Forest Reference: Western Ecology Working Group of... Description: This tentatively defined association has been sampled in Glacier National Park, Montana. It is found at 1440 to 1585 m (4720-5197 feet) elevation on moderately steep toeslopes, as well as on an outwash fan on a basin floor. The association occurs on both colluvial and glacial deposits, with the majority of stands having well-drained sandy loam soil containing up to 50% argillite gravel. The other stand sampled has poorly drained clay loam soil. Despite the apparently well-drained soils and not necessarily collecting positions, this type is hypothesized to be subirrigated. An open canopy of young to mature mixed tree species characterizes this association. <i>Populus tremuloides, Picea engelmannii, Abies lasiocarpa</i>, and <i>Pinus contorta</i> dominate the tree layers, with individuals of all ages present in varying amounts. <i>Populus tremuloides</i> is the most abundant, with all age classes represented and cover of up to 50% in each layer. No conifer species has more than 20% cover in any layer. <i>Rubus parviflorus</i> and <i>Symphoricarpos albus</i> codominate an open short-shrub layer (10 to 20% average cover each) in all stands. <i>Spiraea betulifolia</i> also has high constancy, but lower cover. The dwarf-shrub <i>Paxistima myrsinites</i> dominates the ground layer in one stand with 30% cover. <i>Calamagrostis canadensis</i> is present in all stands with up to 23% cover, clearly dominating the herbaceous layer. <i>Carex geyeri</i> is also always present, with 3% average cover. Although forb diversity is high, the only forb with high constancy and more than trace cover is <i>Eurybia conspicua (= Aster conspicuus)</i>. Ground cover is primarily litter and duff with 5% cover of mosses.  Accession Code: VB.CC.31860.CEGL005909 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.730805 NatureServe Explorer   Translated: Black Cottonwood - Quaking Aspen - Conifer / Bluejoint Forest   Code: CEGL005909   Scientific: Populus balsamifera ssp. trichocarpa - Populus tremuloides - Conifer / Calamagrostis canadensis Forest