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Tsuga heterophylla - Pseudotsuga menziesii - Abies amabilis / Paxistima myrsinites Forest | NatureServe Biotics 2019
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Name: Tsuga heterophylla - Pseudotsuga menziesii - Abies amabilis / Paxistima myrsinites Forest Reference: NatureServe Biotics 2019 Description: This coniferous community is found in the climatically transitional middle to leeward eastern valley systems of the Coast Mountains from the lower Klinaklini River at the head of Knight Inlet northwestward to the lower Kimsquit River valley near the headwaters of Dean Channel, approximately 75 km north of Bella Coola. The slope positions are variable, from ridge crests to middle slopes and flats. The sandy soils are developed on morainal, colluvial, and fluvial or glaciofluvial materials. Very rapidly to rapidly drained, moderately dry and nutrient-poor to medium soils are normal for these sites. In the mature to old-forest stage <i>Tsuga heterophylla</i> and <i>Pseudotsuga menziesii</i> often have highest coverage in the canopy, followed by <i>Thuja plicata</i> and <i>Abies amabilis</i>. Along with regeneration of all of the above conifers except <i>Pseudotsuga menziesii</i>, the shrub layer features <i>Paxistima myrsinites, Vaccinium membranaceum, Vaccinium parvifolium, Amelanchier alnifolia</i>, and <i>Menziesia ferruginea</i>. The lightly developed herb layer typically includes <i>Chimaphila umbellata, Orthilia secunda, Goodyera oblongifolia</i>, and <i>Pyrola asarifolia</i>. <i>Rhytidiopsis robusta, Pleurozium schreberi, Hylocomium splendens</i>, and <i>Peltigera</i> spp. lead in the well-developed moss layer. This association is distinguished by its moderately dry and nutritionally poor to medium soils. When found growing together throughout a mature to old-forest successional stage, <i>Paxistima myrsinites</i> and <i>Chimaphila umbellata</i> are helpful indicators for this community. Unless associated with small drier microsites, there should be an absence or only very low coverage of <i>Pinus contorta, Arctostaphylos uva-ursi</i>, and <i>Cladonia</i> spp.  Accession Code: urn:lsid:vegbank.org:commConcept:31738-{BFFBAAD6-FB21-45D4-9B98-95713F933391} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 14-Sep-2005 to: ongoing
	status: accepted Community's Parent: Abies amabilis - Tsuga heterophylla / Vaccinium membranaceum Cold Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.787614 NatureServe Explorer   Code: CEGL002836   Translated: Western Hemlock - Douglas-fir - Pacific Silver Fir / Oregon Boxleaf Forest   Scientific: Tsuga heterophylla - Pseudotsuga menziesii - Abies amabilis / Paxistima myrsinites Forest (convergence) and Synonyms: (similar) Tsuga heterophylla - Pseudotsuga menziesii - Abies amabilis / Paxistima myrsinites Forest