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Abies grandis / Mahonia nervosa Forest | Western Ecology Working Group of...
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Name: Abies grandis / Mahonia nervosa Forest Reference: Western Ecology Working Group of... Description: This forest association occurs in the eastern Cascades of Washington between Lake Chelan and Mount Adams on all aspects between 760-1100 m (2500-3600 feet) elevation. Two locally described associations, Abies grandis / Berberis nervosa and Abies grandis / Berberis nervosa / Calamagrostis rubescens, are included in this type. The former appears on midslopes on deeper soils with more volcanic ash and with more maritime climates than the latter, which is typically found on upper slopes. Pseudotsuga menziesii codominates the forest canopy with Abies grandis. Larix occidentalis, Pinus ponderosa or Pinus contorta can be members of the upper canopy. Abies grandis dominates the regeneration layers. A short-shrub layer (less than 1 m) with scattered forbs and graminoids typify the understory. The evergreen shrub Mahonia nervosa (= var. nervosa) is found in all examples and usually the most abundant of several shrubs. Symphoricarpos mollis, Rosa gymnocarpa, Linnaea borealis, and Paxistima myrsinites are the most commonly associated shrubs. The graminoids Calamagrostis rubescens and Carex geyeri are the most abundant and frequent herbaceous species, although a few of several possible broad-leaved forb species are always present. Sampled stands are between 75 and 125 years old; the oldest stands are around 200 years old. This association includes Abies grandis forest with Mahonia nervosa well-represented in the understory without a dominant tall-shrub component (Acer circinatum primarily), and/or with an herbaceous layer that is not dominated by Achlys triphylla. This association is found on better drained uplands sites than sites with abundant Achlys triphylla. Spiraea betulifolia var. lucida, Calamagrostis rubescens, and Festuca occidentalis are more common in this association than on sites with abundant Achlys triphylla.  Accession Code: VB.CC.18860.ABIESGRANDISMAH 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 grandis Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Grand Fir / Dwarf Oregon-grape Forest   UID: ELEMENT_GLOBAL.2.683996 NatureServe Explorer   Code: CEGL000271   Scientific: Abies grandis / Mahonia nervosa Forest (convergence) and Synonyms: (undetermined) Abies grandis / Mahonia nervosa Forest