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A.175 | EcoArt 2002
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Name: A.175
Reference: EcoArt 2002
Description: This is a coniferous forest alliance found at moderate (montane to lower subalpine) elevations in mountains of central and eastern Oregon, from 1220 m to over 2280 m. Sites include edges of meadows, streamside terraces, lakeshores, and flat to slightly concave drainages and basins. Valleys where it occurs are broad, low-gradient, and usually flat-bottomed. Soils in central Oregon are derived from pumice alluvium, which has weathered into silts, sandy loams and silty clay loams. Wetter stands will have a significant organic component, sometime with a peat layer. The soil surface will often be slightly flooded at snowmelt, but by late summer the water table will drop to >1 m depth. It occurs wherever ~Pinus contorta$ is invading ~Deschampsia caespitosa$-dominated meadows. ~Pinus contorta$ is the only tree present in the reported stands, and is the only species represented in the regeneration layer. ~Deschampsia caespitosa$ dominates the herbaceous layer, often with very high cover (>30%), and is usually distributed evenly throughout a stand. Other herbaceous species present will vary depending on soil moisture and elevation. Forbs can include ~Thalictrum occidentale, Fragaria$ spp., ~Trifolium longipes, Symphyotrichum spathulatum (= Aster occidentalis), Mimulus primuloides, Achillea millefolium, Antennaria$ spp., ~Potentilla$ spp., and others. Graminoids that can be present include ~Juncus balticus, Koeleria macrantha, Calamagrostis canadensis, Danthonia californica$, or ~Carex$ spp. Other woody species are typically not present. 
Accession Code: VB.CC.1489.A175
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: PINUS CONTORTA TEMPORARILY FLOODED FOREST ALLIANCE
  Code: A.175
  Common: Lodgepole Pine Temporarily Flooded Forest Alliance
(convergence) and Synonyms:
(undetermined) Pinus contorta Temporarily Flooded Forest Alliance