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Populus balsamifera ssp. trichocarpa - Picea sitchensis - Tsuga heterophylla Riparian Forest Alliance | NatureServe Biotics 2019
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Name: Populus balsamifera ssp. trichocarpa - Picea sitchensis - Tsuga heterophylla Riparian Forest Alliance
Reference: NatureServe Biotics 2019
Description: This alliance comprises streamside riparian forests dominated by <i>Populus balsamifera ssp. trichocarpa</i> in the upper canopy. The canopy can be codominated by coniferous trees such as <i>Pseudotsuga menziesii, Picea sitchensis, Tsuga heterophylla</i>, and/or <i>Pinus ponderosa</i>. <i>Populus balsamifera ssp. trichocarpa</i> is always present and is always mixed with equal to at least half as much conifer cover in the upper canopy. This alliance is found in Oregon, Washington, British Columbia and Alaska at low elevations along major rivers on middle and high terraces. Stands occur on active floodplains on well-drained alluvial soils that either experience overbank flooding or high water tables during snowmelt and rainy seasons. Stands may also occur on higher terraces that are less likely to flood. Channels may be large like the Columbia and Willamette rivers, or occur along smaller tributaries. Stands may be far from an active channel, but are well within the active 100-year floodplain. This alliance does not include isolated hillside springs or seeps. 
Accession Code: urn:lsid:vegbank.org:commConcept:38958-{10A89E7F-283F-4BE0-9F04-BEACBD61B564}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Sep-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.899796 NatureServe ExplorerNatureServe Explorer logo
  Code: A3744
  Translated: Black Cottonwood - Sitka Spruce - Western Hemlock Riparian Forest Alliance
  Common: Black Cottonwood - Sitka Spruce - Western Hemlock Riparian Forest
  Scientific: Populus balsamifera ssp. trichocarpa - Picea sitchensis - Tsuga heterophylla Riparian Forest Alliance