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A.422 | EcoArt 2002
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Name: A.422 Reference: EcoArt 2002 Description: Stands included in this mixed evergreen-deciduous forest alliance have been described from mountain slopes and plateaus in Idaho, Utah and Wyoming. Stands occur on gentle to steep slopes on all aspects, but are most common on cooler and more mesic, north and east aspects. Soils are derived from alluvium and colluvium from sedimentary, metamorphic and igneous parent materials. The mixed coniferous and deciduous tree canopy is open to moderately closed, and is dominated by ~Populus tremuloides$ and ~Abies lasiocarpa$ or ~Picea engelmannii$. Several other species of conifers may be scattered within the stands including ~Pseudotsuga menziesii, Abies concolor, Picea pungens, Pinus contorta$, and ~Pinus flexilis$. Younger stands typically have dense ~Populus tremuloides$ with ~Abies lasiocarpa$ or ~Picea engelmannii$ mixed in. As the stands age, ~Populus tremuloides$ is slowly reduced until conifers become dominant. The understory is typically composed of a short-shrub layer, often dominated by ~Juniperus communis, Shepherdia canadensis$ or ~Symphoricarpos oreophilus$. Other shrubs may include ~Mahonia repens, Paxistima myrsinites, Physocarpus malvaceus$, and ~Rosa woodsii$. If present, the tall-shrub layer often consists of scattered ~Amelanchier alnifolia, Acer grandidentatum$, and ~Prunus virginiana$. The relatively sparse herbaceous layer is a mixture of graminoids and forbs and is often dominated by ~Bromus carinatus, Calamagrostis rubescens, Carex geyeri, Carex rossii, Pedicularis racemosa$, or ~Thalictrum fendleri$. Diagnostic of these seral forests is the open to moderately closed, mixed coniferous and deciduous tree canopy codominated by ~Populus tremuloides$ and ~Abies lasiocarpa$ or ~Picea engelmannii$.  Accession Code: VB.CC.2086.A422 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Mar-2005
	status: accepted Community's Parent: I.C.3.N.a This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: ABIES LASIOCARPA - POPULUS TREMULOIDES FOREST ALLIANCE   Code: A.422   Common: Subalpine Fir - Quaking Aspen Forest Alliance (convergence) and Synonyms: (undetermined) Abies lasiocarpa - Populus tremuloides Forest Alliance