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Tsuga heterophylla - Thuja plicata / Vaccinium (alaskaense, ovalifolium) / Hylocomium splendens Forest | NatureServe Biotics 2019
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Name: Tsuga heterophylla - Thuja plicata / Vaccinium (alaskaense, ovalifolium) / Hylocomium splendens Forest Reference: NatureServe Biotics 2019 Description: This low-productivity coniferous community is predominantly on shedding upper slope and crest positions. It has a potentially wide environmental distribution: from sea level to 850 m elevation or higher in the montane (lower in the north along the mainland coast); from western to northern Vancouver Island, and along the windward Coast Mountains from the Fraser River valley northward to Portland Canal in association with the Very Wet Maritime Coastal Western Hemlock Subzone (CWHvm). The mostly well-drained soils are poor-quality thin veneers of freely draining organic materials, as well as thin veneers of colluvial or morainal materials directly over ridged or hummocky bedrock. <i>Tsuga heterophylla</i> and <i>Thuja plicata</i>, or <i>Tsuga heterophylla</i> and <i>Callitropsis nootkatensis</i> at higher montane elevations, dominate the relatively open poor-productivity canopy. The moderately developed shrub layer is, at least at lower elevations, dominated by <i>Gaultheria shallon</i>, with variable coverage of <i>Tsuga heterophylla</i> and <i>Thuja plicata</i> regeneration. The poorly developed herb layer includes scattered <i>Cornus canadensis, Blechnum spicant, Goodyera oblongifolia, Linnaea borealis</i>, and <i>Listera cordata</i>. <i>Hylocomium splendens</i> and <i>Rhytidiadelphus loreus</i> dominate the moderately developed moss layer. These sites are distinguished by their upper slope or crest position, poor tree growth with a general absence of <i>Pinus contorta var. contorta</i>, poor nutrient status, and a normally good coverage of <i>Gaultheria shallon</i>. This community is differentiated from an even drier and poorer site by the absence, or only very low coverage, of the driest site indicators such as <i>Cladina</i> spp. and <i>Cladonia</i> spp.  Accession Code: urn:lsid:vegbank.org:commConcept:31682-{BC984DAF-DE89-4B16-B5B5-D633223264A6} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 19-Aug-2008 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Thuja plicata / Blechnum spicant Rich Mesic Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.777940 NatureServe Explorer   Code: CEGL002778   Translated: Western Hemlock - Western Red-cedar / (Alaska Blueberry, Oval-leaf Blueberry) / Splendid Feathermoss Forest   Scientific: Tsuga heterophylla - Thuja plicata / Vaccinium (alaskaense, ovalifolium) / Hylocomium splendens Forest (convergence) and Synonyms: (similar) Tsuga heterophylla - Thuja plicata / Vaccinium (alaskaense, ovalifolium) - Gaultheria shallon / Hylocomium splendens Forest