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Picea sitchensis - Tsuga heterophylla / Vaccinium (alaskaense, ovalifolium) Forest | NatureServe Biotics 2019
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Name: Picea sitchensis - Tsuga heterophylla / Vaccinium (alaskaense, ovalifolium) Forest Reference: NatureServe Biotics 2019 Description: Stands consist of moderately dense uneven-aged <i>Picea sitchensis</i>. <i>Tsuga heterophylla</i> is often a minor component in the overstory and understory. Tree height ranges from 23 to 32 m (75-105 feet), and tree age ranges up to 205 years. <i>Vaccinium alaskaense</i> or <i>Vaccinium ovalifolium</i>, the diagnostic understory species, dominate the shrub layer; <i>Oplopanax horridus</i> and <i>Rubus spectabilis</i> occur in most stands as a minor component. <i>Rubus pedatus</i> and <i>Gymnocarpium dryopteris</i> have high coverage values in most stands. Other forb, graminoid, and fern species have highly variable cover values. In many stands, bryophytes form a carpet consisting mainly of <i>Hylocomium splendens</i> and <i>Rhytidiadelphus loreus</i>. This type occurs throughout southeast and south-central Alaska. As described from the Cooper River Delta, this association is a minor type occurring on floodplains, proximal outwash, beach ridges, and spits. It occurs as stringers, broad expanses of forest, or inclusions within forests. Sites occur on alluvial surfaces formed on outwash plains, and on coastal dune crests or uplifted dunes. They are typically well-drained, although on the outwash plains and floodplains, during high riverflows, they may be inundated. Some sites are sufficiently elevated above the river to avoid flooding. The surface topography is typically level on outwash plains and undulating on dune systems. On outwash plains and floodplains the soils are deep, well-drained alluvium, and on dunes they are deep, well-drained eolian sand. Soils are variable, classified as either Typic Cryorthents or Typic Cryochrept. In general, they are characterized by a humus layer less than 10 cm (4 inches) thick over silt or sand. The pH of the humus layer ranges from 4.5 to 5.1, and the mineral layer pH ranges from 5.4 to 6.4. Horizon development was noted for all soil profiles. Gleying and mottling were not observed, and soil salinity was low.  Accession Code: urn:lsid:vegbank.org:commConcept:32144-{7C8690C6-7814-41E9-AEA9-083B573171F4} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 16-Nov-2005 to: ongoing
	status: accepted Community's Parent: Tsuga heterophylla - Picea sitchensis / Vaccinium alaskaense Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.686625 NatureServe Explorer   Code: CEGL003261   Translated: Sitka Spruce - Western Hemlock / (Alaska Blueberry, Oval-leaf Blueberry) Forest   Scientific: Picea sitchensis - Tsuga heterophylla / Vaccinium (alaskaense, ovalifolium) Forest (convergence) and Synonyms: (similar) CEGL003261 (similar) Picea sitchensis / Vaccinium ovalifolium Forest (similar) Picea sitchensis / Vaccinium ovalifolium Forest