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A.176 | EcoArt 2002
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Name: A.176
Reference: EcoArt 2002
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.1495.A176
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: I.A.8.N.e
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: ABIES GRANDIS TEMPORARILY FLOODED FOREST ALLIANCE
  Common: Grand Fir Temporarily Flooded Forest Alliance
  Code: A.176
(convergence) and Synonyms:
(undetermined) Abies grandis Temporarily Flooded Forest Alliance