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Dryas drummondii / Chamerion latifolium Dwarf-shrubland | Western Ecology Working Group of...
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Name: Dryas drummondii / Chamerion latifolium Dwarf-shrubland Reference: Western Ecology Working Group of... Description: This dwarf-shrubland association is apparently widespread in the Canadian Rocky Mountains, being reported from northwestern Montana, north and west into Alberta and British Columbia. This is a small-patch community associated with fluvial and glacial landforms, most especially point bars and stream terraces having well- to rapidly drained cobbly soils (Inceptisols of U.S. and Regosols of Canadian designation). It is found in the montane to lower subalpine zones, ranging in elevation from 1000 to 1700 m. Sites typically have gentle slopes and various aspects. Landforms include point bars, fluvial terraces or benches, gently sloping banks, moraines, and lakeshores. These sites are temporarily flooded in spring runoff, experiencing both fluvial deposition and erosion. That portion of the surface not covered by a vegetation mat is occupied by a variable combination of exposed soil and small cobbles that ranges between 15 and 65% cover. Dryas drummondii cover ranges from 25% to more than 80%, seldom projecting more than 0.03 m above the surface. Shepherdia canadensis, Salix brachycarpa, and Juniperus communis are the only other shrubs with more than 50% constancy, and they generally occur in low amounts. Arctostaphylos uva-ursi can occur in drier stands. The herbaceous layer is species-poor and has low cover. Oxytropis sericea and Chamerion latifolium (= Epilobium latifolium) are the only forbs present in half the plots or more and in greater than trace amounts. Seedlings of Populus balsamifera ssp. trichocarpa, Picea glauca, and Picea engelmannii are found here, but given the high energy environment of these sites, they apparently are uprooted before they can become securely established.  Accession Code: VB.CC.28166.DRYASDRUMMONDII Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 28-Jan-2004 to: 17-Nov-2014
	status: accepted Community's Parent: Dryas drummondii Dwarf-shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Drummond's Mountain-avens / Dwarf Fireweed Dwarf-shrubland   Scientific: Dryas drummondii / Chamerion latifolium Dwarf-shrubland   UID: ELEMENT_GLOBAL.2.728793 NatureServe Explorer   Code: CEGL005834 (convergence) and Synonyms: (undetermined) Dryas drummondii / Chamerion latifolium Dwarf-shrubland