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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 on dry-mesic rocky and sandy sites of the hemi-boreal regions of central Canada and adjacent United States. Stands occur on ridges, with occasional exposed bedrock with shallow soils, or on sandy soils. Exposed bedrock ranges from 5-20%. These sites are rapidly drained. The vegetation contains a tree canopy with a mix of <i>Populus tremuloides, Betula papyrifera</i> and, occasionally, <i>Populus grandidentata</i>. Percent cover ranges from 20-60%. There is often a subcanopy (usually about 30% cover) containing the species in the canopy as well as <i>Abies balsamea, Acer rubrum</i> and, less commonly, <i>Quercus ellipsoidalis</i>. 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 <i>Corylus cornuta</i> and <i>Populus</i> spp. with cover ranging from 20-90%. The herb layer in these patches consists of <i>Aralia nudicaulis, Pteridium aquilinum</i> and <i>Eurybia macrophylla (= Aster macrophyllus)</i> with cover typically in the 60-70% range. The bedrock outcrops often contain a low cover of <i>Vaccinium</i> spp. The herb layer associated with bedrock typically contains <i>Woodsia ilvensis, Schizachne purpurascens</i> and <i>Elymus trachycaulus (= Agropyron trachycaulum)</i>, with cover usually low (less than 25%). These bedrock areas may also contain a low cover of <i>Pleurozium schreberi</i> and <i>Cladina rangiferina, Cladina mitis</i> and <i>Cladina stellaris</i>. Diagnostic features are the canopy of <i>Populus tremuloides, Populus grandidentata</i>, and/or <i>Betula papyrifera</i>, with less than 60% cover and canopy closure prevented by the presence of exposed bedrock.  Accession Code: VB.CC.36840.CEGL002487 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:   Common: Mixed Aspen Rocky Woodland   Translated: Quaking Aspen - (Bigtooth Aspen) Rocky Woodland   Scientific: Populus tremuloides - (Populus grandidentata) Rocky Woodland   Code: CEGL002487   UID: ELEMENT_GLOBAL.2.684258 NatureServe Explorer