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Alnus rubra Forest Alliance | Western Ecology Working Group of...
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Name: Alnus rubra Forest Alliance Reference: Western Ecology Working Group of... Description: The vegetation within this alliance occurs along the Pacific Coast from central California north through Oregon and Washington, usually along low-elevation (0-1000 m) streams or valley bottoms, but often forming a seral community in moist coniferous forests. A disjunct of this alliance may possibly occur on moist slopes and valleys of northern Idaho between 400 and 900 m in elevation. In both the coastal and interior regions, this alliance is usually associated with Tsuga heterophylla / Thuja plicata forest. Alnus rubra is well-adapted to wet soil conditions and is highly shade-intolerant. It grows best in riparian habitats of western Oregon and Washington on alluvial valley bottom landforms and adjacent moist toeslopes. Communities within this type are usually strongly dominated by Alnus rubra, which forms a diffuse canopy. Emergent conifers, such as Pseudotsuga menziesii or Picea sitchensis, may be present, depending upon stand history. Acer macrophyllum may also be present in the tree stratum. The forest undergrowth is usually species-rich and well-developed compared to adjacent conifer forests. Common shrub species in stands of this alliance include Rubus spectabilis, Sambucus racemosa var. melanocarpa, Acer circinatum, and Menziesia ferruginea. The herbaceous layer is often well-developed, with Oxalis oregana, Polystichum munitum, and Stachys mexicana particularly common.  Accession Code: VB.CC.17977.ALNUSRUBRAFORES Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Translated: Red Alder Forest Alliance   Scientific: Alnus rubra Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125867 NatureServe Explorer   Code: A.264