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Abies grandis / Chrysolepis chrysophylla Forest | Western Ecology Working Group of...
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Name: Abies grandis / Chrysolepis chrysophylla Forest Reference: Western Ecology Working Group of... Description: This mixed conifer association occurs on the eastern slope of the Oregon Cascades and is most often found on north-facing slopes between 1025-1350 m elevation. The moderate elevation make sites warmer and drier than most other <i>Abies grandis</i> associations. Soils are derived from volcanic ash and basalt parent materials and the surface layers are especially deep fine, sandy loams. The tree canopy is codominated by <i>Pseudotsuga menziesii</i> and <i>Abies grandis</i>, each of which attain about 22% cover. <i>Abies grandis</i> trees have grown in older stands following the advent of fire suppression earlier this century. <i>Pinus ponderosa</i> is also common but averages only 15% cover. <i>Pinus contorta</i> is abundant in fire initiated stands less than 100 years of age. The north-facing aspects moderate the moisture and temperature enough to allow occasional individuals of <i>Larix occidentalis</i> an <i>Pinus monticola</i> to grow despite being near the limits of their physiological tolerance. The dominant shrubs are <i>Chrysolepis chrysophylla (= Castanopsis chrysophylla)</i> and <i>Symphoricarpos mollis</i> (or <i>Symphoricarpos albus</i>), each averaging about 5% cover. <i>Rosa gymnocarpa</i> and <i>Chimaphila umbellata</i> are also common. <i>Acer circinatum</i> is infrequent but may occur in large patches. <i>Linnaea borealis</i> is common in the herbaceous layer and may be extensive; it is often accompanied by <i>Achlys triphylla</i> and other herbs. Known stands are located in areas where heavy grazing by sheep occurred in the early 1900s. The floristics of this association may still be influenced by the selective overgrazing and soil compaction that occurred at that time. This association has more shrub cover, especially by <i>Chrysolepis chrysophylla</i>, than either ~<i>Abies grandis / Linnaea borealis</i> Forest (CEGL000275)$$ or ~<i>Abies grandis - Pseudotsuga menziesii / Trientalis borealis ssp. latifolia</i> Forest (CEGL000040)$$.  Accession Code: VB.CC.34704.CEGL000038 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.2.683744 NatureServe Explorer   Translated: Grand Fir / Giant Chinquapin Forest   Scientific: Abies grandis / Chrysolepis chrysophylla Forest   Code: CEGL000038