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Tsuga heterophylla - Thuja plicata / Ledum glandulosum Treed Bog Alliance | NatureServe Biotics 2019
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Name: Tsuga heterophylla - Thuja plicata / Ledum glandulosum Treed Bog Alliance Reference: NatureServe Biotics 2019 Description: This alliance consists of deep peat, organic, treed fens and bogs dominated in the upper canopy by <i>Tsuga heterophylla</i> and/or <i>Thuja plicata</i>. <i>Pseudotsuga menziesii</i> and <i>Abies grandis</i> may also share the upper tree canopy, and cold-deciduous trees, including <i>Alnus rubra</i> and <i>Acer macrophyllum</i>, often form a subcanopy layer. <i>Acer circinatum, Menziesia ferruginea, Oplopanax horridus, Rubus spectabilis</i>, and <i>Vaccinium</i> spp. are the most common shrubs. The herbaceous layer is dominated by wetland and moist forest species. These are open woodlands with trees that are at least 5 m tall, but the canopy layer can be very open (10-20%). Thick sphagnum moss species cover the ground, and a low-shrub layer may or may not be present. <i>Ledum glandulosum</i> is often a dwarf-shrub layer component. This alliance is found in southern British Columbia coastal areas, coastal Oregon and the Puget Lowlands of Washington. These forests occur on stream terraces, in depressions adjacent to streams, as impounded wetlands, and on subirrigated soils with an impermeable layer near the surface. Perennially saturated sites occur at or below the water table, and may have artesian springs. The soils are organic and saturated for part of the growing season.  Accession Code: urn:lsid:vegbank.org:commConcept:38977-{CA470D73-0E88-4271-83EC-B3CC2C3609AA} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 18-Dec-2014 to: ongoing
	status: accepted Community's Parent: Pinus contorta var. contorta / Ledum groenlandicum / Sphagnum spp. Wooded Bog & Poor Fen Group This Community's Level: Alliance This Community's Children: Show/Hide   Thuja plicata - Callitropsis nootkatensis - Tsuga heterophylla / Coptis aspleniifolia / Sphagnum spp. Treed Bog   Tsuga heterophylla / Ledum glandulosum / Carex obnupta - Lysichiton americanus Treed Bog   Tsuga heterophylla - (Thuja plicata) / Ledum groenlandicum / Sphagnum spp. Treed Bog   Tsuga heterophylla - (Thuja plicata) / Sphagnum spp. Treed Bog		Names:   UID: ELEMENT_GLOBAL.2.899815 NatureServe Explorer   Code: A3763   Translated: Western Hemlock - Western Red-cedar / Western Labrador-tea Treed Bog Alliance   Common: Western Hemlock - Western Red-cedar / Western Labrador-tea Treed Bog   Scientific: Tsuga heterophylla - Thuja plicata / Ledum glandulosum Treed Bog Alliance