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Abies grandis Temporarily Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Abies grandis Temporarily Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: Vegetation within the Abies grandis Temporarily Flooded Forest Alliance (A.176) occurs within the maritime-influenced region of the northern Rocky Mountains. This alliance generally occupies sites on benches, toeslopes or valley bottoms along mountain streams. These sites are outside the range of Thuja plicata, which dominates similar sites throughout the wetter parts of the Pacific Northwest. Elevations where the alliance occurs range from 790-1410 m. Soils are typically very cobbly silt loams or sandy loam. Water tables are generally within 1 m of the soil surface in the spring, but the soils are well-drained. Picea engelmannii is often a codominant with Abies grandis in stands of this alliance. Pseudotsuga menziesii or Larix occidentalis may be present at the drier margins, and Abies lasiocarpa may occur in higher elevation or frost pocket locations. Betula papyrifera or Populus balsamifera ssp. trichocarpa sometimes form a scattered subcanopy. There is usually a rich and well-developed shrub layer. Common shrubs include Acer glabrum, Rubus parviflorus, Symphoricarpos albus, Linnaea borealis, and Rosa gymnocarpa. The herbaceous layer is characterized by a diverse assemblage of moist-site forbs and ferns, including Athyrium filix-femina, Tiarella trifoliata, Aralia nudicaulis, Senecio triangularis, Goodyera oblongifolia, Osmorhiza berteroi (= Osmorhiza chilensis), Orthilia secunda, Maianthemum stellatum, and Galium triflorum.  Accession Code: VB.CC.20985.ABIESGRANDISTEM 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:   Scientific: Abies grandis Temporarily Flooded Forest Alliance   Translated: Grand Fir Temporarily Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.126129 NatureServe Explorer   Code: A.176