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Arctic Acidic Dryas Dwarf-shrub Tundra Alliance | NatureServe Biotics 2019
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Name: Arctic Acidic Dryas Dwarf-shrub Tundra Alliance
Reference: NatureServe Biotics 2019
Description: This tundra alliance is defined by vegetation dominated by the dwarf, broad-leaved evergreen shrub species <i>Dryas octopetala</i> and/or <i>Dryas integrifolia</i>. In addition to its dominant species, <i>Dryas</i> dwarf-shrub tundra supports high constancy of the dwarf willows <i>Salix reticulata, Salix arctica, Salix phlebophylla</i>, the ericaceous shrubs <i>Cassiope tetragona</i> and <i>Vaccinium uliginosum</i>, the grass <i>Anthoxanthum monticola ssp. alpinum</i>, the sedge <i>Carex scirpoidea</i>, and the lichens <i>Thamnolia vermicularis</i> and <i>Flavocetraria nivalis</i>. <i>Dryas</i> vegetation is common on exposed, windswept areas with little winter snow cover throughout arctic and subarctic Alaska, Canada, and possibly parts of Greenland. Types dominated by <i>Dryas octopetala</i> appear to be more common at high elevation on alpine slopes and ridges, whereas types dominated by <i>Dryas integrifolia</i> are more common at high latitude in the Arctic as well as on inactive floodplains and in drained lake basins. Substrates are typically mineral and are non-acidic to circumneutral. Patch size is small to matrix-forming. 
Accession Code: urn:lsid:vegbank.org:commConcept:39517-{FC38D935-2733-43FD-8FA6-B94C1872DBD7}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 19-Jan-2016 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.1042050
  Code: A4332
  Translated: Arctic Acidic Dryas Dwarf-shrub Tundra Alliance
  Common: Arctic Acidic Dryas Dwarf-shrub Tundra
  Scientific: Arctic Acidic Dryas Dwarf-shrub Tundra Alliance