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Abies concolor - Pinus ponderosa / Amelanchier alnifolia Forest | Western Ecology Working Group of...
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Name: Abies concolor - Pinus ponderosa / Amelanchier alnifolia Forest Reference: Western Ecology Working Group of... Description: The association is found in south-central Oregon and possibly northeastern California, in mountains between 1525 and 1830 m in the Modoc Plateau - East Cascades ecoregion. These are open forests or occasionally woodlands characterized by large, widely spaced, Pinus ponderosa trees. They occur on all aspects, slopes between 5-55%, primarily on flats or sideslopes. Pinus ponderosa dominates the open canopy, with between 2-50% cover. Abies concolor ranges from 0-30% cover, while Calocedrus decurrens accounts for 0-10% of the cover. All three species are always found in the understory. Shrubs occupy 20% of the cover, with Amelanchier alnifolia, Ceanothus prostratus and Mahonia repens generally present, and with Ceanothus velutinus locally important. Poa wheeleri (= Poa nervosa var. wheeleri) is the most important understory grass, but Festuca idahoensis and Arnica cordifolia may also be important. This association can be distinguished by the combination of Pinus ponderosa, Abies concolor, and Calocedrus decurrens in the tree layer, and Amelanchier alnifolia present in the shrub layer. Similar Abies concolor - Pinus ponderosa associations tend to have more closed canopies, and lack the three characteristic shrubs and Poa nervosa.  Accession Code: VB.CC.19210.ABIESCONCOLORPI 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: Abies concolor Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Fir - Ponderosa Pine / Saskatoon Serviceberry Forest   UID: ELEMENT_GLOBAL.2.684070 NatureServe Explorer   Code: CEGL000014   Scientific: Abies concolor - Pinus ponderosa / Amelanchier alnifolia Forest (convergence) and Synonyms: (undetermined) Abies concolor - Pinus ponderosa / Amelanchier alnifolia Forest