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Alnus viridis ssp. sinuata Temporarily Flooded Shrubland Alliance | Western Ecology Working Group of...
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Name: Alnus viridis ssp. sinuata Temporarily Flooded Shrubland Alliance Reference: Western Ecology Working Group of... Description: These communities are located in the moderate to high-elevation (1200-3000 m) riparian habitats of the northern Rocky Mountains and Cascade Range where deep snow accumulations are common. They usually occur in somewhat steep drainages, which flood from spring snowmelt or summer rainstorms. The wet soils and frequent fluvial disturbance act to discourage colonization by coniferous trees and allow full sunlight to reach the ground at these sites. Soils are often composed of sorted gravels and sands on aggraded fluvial terraces. A dense tall-shrub cover of Alnus viridis ssp. sinuata characterizes this alliance. Acer circinatum and/or Alnus incana may be codominant in the tall-shrub layer in some stands. Acer glabrum, Ribes lacustre, and Sorbus scopulina may also be present. In the northern Rocky Mountains, Abies lasiocarpa colonizes these communities, and scattered seedlings or saplings may be present. Low cold-deciduous or ericaceous shrubs may be abundant, including Rubus spectabilis, Rubus parviflorus, Sambucus racemosa, Paxistima myrsinites, and Vaccinium spp. A lush herbaceous layer is usually present, including forbs such as Aconitum columbianum, Achillea millefolium, Heracleum maximum (= Heracleum lanatum), Veratrum viride, Senecio triangularis, Urtica dioica, Osmorhiza berteroi (= Osmorhiza chilensis), and large ferns, including Athyrium filix-femina and Polystichum munitum.  Accession Code: VB.CC.18299.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 Temporarily Flooded Shrubland Alliance   Translated: Sitka Alder Temporarily Flooded Shrubland Alliance   UID: HIGHER_CLASS_UNIT.2.124885 NatureServe Explorer   Code: A.966