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Populus tremuloides - (Populus grandidentata) Rocky Woodland | Midwestern Ecology Working Group...
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Name: Populus tremuloides - (Populus grandidentata) Rocky Woodland Reference: Midwestern Ecology Working Group... Description: This aspen rocky woodland type is found in the rocky boreal regions of central Canada and adjacent United States. Stands occur on bedrock ridges with shallow soils. Soils range from non-existent on bedrock openings to 8-12 cm loams or sandy loams in low areas where soil has developed. Slopes are generally gentle (1-10%) with variable aspects. Exposed bedrock ranges from 5-20%. These sites are rapidly drained. The vegetation contains a tree canopy with a mix of Populus tremuloides, Betula papyrifera and, occasionally, Populus grandidentata. Percent cover ranges from 20-60%. There is often a subcanopy (usually about 30% cover) containing the species in the canopy as well as Abies balsamea, Acer rubrum and, less commonly, Quercus ellipsoidalis. In the patches of soil that exist between the bedrock outcrops, vegetation can be more forest-like. These areas contain a short-shrub layer of Corylus cornuta and Populus spp. with cover ranging from 20-90%. The herb layer in these patches consists of Aralia nudicaulis, Pteridium aquilinum and Eurybia macrophylla (= Aster macrophyllus) with cover typically in the 60-70% range. The bedrock outcrops often contain a low cover of Vaccinium spp. The herb layer associated with bedrock typically contains Woodsia ilvensis, Schizachne purpurascens and Elymus trachycaulus (= Agropyron trachycaulum), with cover usually low (less than 25%). These bedrock areas may also contain a low cover of Pleurozium schreberi and Cladina rangiferina, Cladina mitis and Cladina stellaris. Diagnostic features are the canopy of Populus tremuloides, Populus grandidentata, and/or Betula papyrifera, with less than 60% cover and canopy closure prevented by the presence of exposed bedrock.  Accession Code: VB.CC.20260.POPULUSTREMULOI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Populus tremuloides Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Quaking Aspen - (Bigtooth Aspen) Rocky Woodland   UID: ELEMENT_GLOBAL.2.684258 NatureServe Explorer   Code: CEGL002487   Scientific: Populus tremuloides - (Populus grandidentata) Rocky Woodland   Common: Mixed Aspen Rocky Woodland (convergence) and Synonyms: (undetermined) Populus tremuloides - (Populus grandidentata) Rocky Woodland