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Tsuga heterophylla Woodland Alliance | Western Ecology Working Group of...
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Name: Tsuga heterophylla Woodland Alliance Reference: Western Ecology Working Group of... 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.25143.TSUGAHETEROPHYL 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: Tsuga heterophylla Woodland Alliance   Translated: Western Hemlock Woodland Alliance   UID: HIGHER_CLASS_UNIT.2.125631 NatureServe Explorer   Code: A.549