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Populus tremuloides - Abies lasiocarpa / Juniperus communis Forest | Western Ecology Working Group of...
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Name: Populus tremuloides - Abies lasiocarpa / Juniperus communis Forest Reference: Western Ecology Working Group of... Description: This successional, mixed aspen-conifer forest occurs in the upper montane forest zone in Colorado and Utah from 2440 to 3050 m (8000-10,000 feet) in elevation. This association represents the successional stage where conifers, especially <i>Abies lasiocarpa</i> and <i>Picea engelmannii</i>, have converted the formerly deciduous canopy dominated by <i>Populus tremuloides</i> to a mixed conifer-deciduous canopy. This forest association occurs on midslopes and high plateaus on various aspects and soils. Tree canopy primarily consists of <i>Populus tremuloides, Picea engelmannii</i>, and <i>Abies lasiocarpa</i>. <i>Pseudotsuga menziesii</i> and <i>Pinus flexilis</i> may be incidentally present but have low canopy cover. Mixed stands must have at least 25% relative tree cover of both aspen (deciduous) and conifers. A tall-shrub layer is distinctly absent in this association; however, a low-shrub layer is present. The low-shrub layer is characterized and dominated or codominated by <i>Juniperus communis</i>. Additional shrubs present often include <i>Symphoricarpos oreophilus, Rosa woodsii</i>, and <i>Mahonia repens</i>, among others. The herbaceous layer is generally a mix of graminoids and forbs, with <i>Carex rossii, Achnatherum occidentale (= Stipa occidentalis), Bromus ciliatus, Elymus trachycaulus, Achillea millefolium, Fragaria vesca, Astragalus miser</i>, and <i>Thalictrum fendleri</i> occurring most commonly. Diagnostic characteristics of this association are the prominence of <i>Juniperus communis</i> in the low-shrub layer beneath a mixed aspen and spruce-fir tree canopy.  Accession Code: VB.CC.32863.CEGL000527 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.2.688543 NatureServe Explorer   Translated: Quaking Aspen - Subalpine Fir / Common Juniper Forest   Scientific: Populus tremuloides - Abies lasiocarpa / Juniperus communis Forest   Code: CEGL000527