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Alnus viridis ssp. sinuata Seasonally Flooded Shrubland Alliance | Western Ecology Working Group of...
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Name: Alnus viridis ssp. sinuata Seasonally Flooded Shrubland Alliance Reference: Western Ecology Working Group of... Description: These communities are located in the moderate to high-elevation (1200-3000 m) seep habitats of the Cascade Range where deep snow accumulations are common. They usually occur in shallow but deeply sloping ravines that receive moisture from snowmelt or groundwater discharge throughout the growing season. Often the ravines where these communities occur are also avalanche tracts. The wet soils and/or avalanche disturbance act to discourage colonization by coniferous trees and allow full sunlight to reach the ground at these sites. Soils are often composed of unstable talus, but may also be similar in structure to adjacent forest soils. A dense tall-shrub cover of Alnus viridis ssp. sinuata characterizes these communities. Acer circinatum and/or Alnus incana may be codominant in the tall-shrub layer in some stands. Acer glabrum, Spiraea douglasii, and Sorbus scopulina may also be present. Low cold-deciduous or ericaceous shrubs may be abundant, including Rubus spectabilis, Rubus parviflorus, Oplopanax horridus, Paxistima myrsinites, and Vaccinium spp., particularly west of the Cascade crest. A lush herbaceous layer is usually present, including forbs such as Aconitum columbianum, Veratrum viride, Senecio triangularis, Urtica dioica, Osmorhiza berteroi (= Osmorhiza chilensis), Achillea millefolium, and large ferns, including Athyrium filix-femina and Polystichum munitum. Adjacent vegetation is usually montane or subalpine coniferous forest dominated by Abies amabilis, Tsuga mertensiana, Pinus contorta, Picea engelmannii, or other forest species.  Accession Code: VB.CC.27139.ALNUSVIRIDISSSP 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: Alnus viridis ssp. sinuata Seasonally Flooded Shrubland Alliance   Translated: Sitka Alder Seasonally Flooded Shrubland Alliance   UID: HIGHER_CLASS_UNIT.2.125356 NatureServe Explorer   Code: A.1000