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A.549 | EcoArt 2002
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Name: A.549
Reference: EcoArt 2002
Description: These woodlands occur on the eastern slope of the northern Cascade Mountains in Washington and in Alaska. This description is mostly based on stands ranging from 740-1070 m in Washington, but they may extend to near sea level in Alaska. Precipitation ranges from 150-500 cm annually. The climate has a strong maritime influence, with deep winter snowpacks. Summers are warm and very dry. Sites are well-drained on nearly level to moderately steep slopes on rocky ridgetops and very rocky glacial outwash deposits. The soils are shallow, acidic, rocky and derived from colluvium and glacial outwash. There is a very high percentage of surface rock and coarse fragments. Rock outcrop is common. These conifer woodlands have an open canopy codominated by ~Tsuga heterophylla$. ~Pseudotsuga menziesii, Thuja plicata, Tsuga mertensiana$, or ~Pinus contorta$ may codominate these multi-layered, canopy stands. Other trees may include ~Pinus monticola, Abies lasiocarpa$, or ~Larix occidentalis$. The patchy, moderately dense shrub layers are dominated by the dwarf-shrubs like ~Arctostaphylos nevadensis$ or the short shrubs ~Gaultheria shallon$ and ~Vaccinium ovalifolium$. There are many other scattered shrubs and dwarf-shrubs. The sparse herbaceous layer is mostly ferns such as ~Pteridium aquilinum$ with scattered graminoids like ~Calamagrostis rubescens$. 
Accession Code: VB.CC.2192.A549
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: II.A.4.N.b
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: TSUGA HETEROPHYLLA WOODLAND ALLIANCE
  Code: A.549
  Common: Western Hemlock Woodland Alliance
(convergence) and Synonyms:
(undetermined) Tsuga heterophylla Woodland Alliance