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Pseudotsuga menziesii / Carex rossii Forest | Western Ecology Working Group of...
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Name: Pseudotsuga menziesii / Carex rossii Forest Reference: Western Ecology Working Group of... Description: This association has been described from the mountains in northern Colorado and may also occur in New Mexico and Arizona. Stands are found on steep (45-65%) north- to northwest-facing slopes with shallow, coarse-textured, well-drained colluvium at elevations of 1670-2930 m. Stands are recognized by the moderately dense tree canopy dominated by Pseudotsuga menziesii, although Pinus ponderosa and Juniperus scopulorum may be present with nearly equal cover. The short-shrub layer is sparse and represented by widely scattered Juniperus communis and Physocarpus monogynus. Carex rossii is the only significant graminoid (4-15% cover), although Leucopoa kingii (= Festuca kingii) may be present. Common forbs include Achillea millefolium var. occidentalis (= Achillea lanulosa), Campanula rotundifolia, Cystopteris fragilis, Heuchera bracteata, Pulsatilla patens ssp. multifida (= Pulsatilla ludoviciana), and Saxifraga rhomboidea. Overstory shade is needed for regeneration success of Pseudotsuga. These forests were originally subject to a high natural fire frequency. Recently, fire suppression activities have resulted in unnaturally high sapling densities, as well as increased fuel loads. Sapling densities have resulted in a decreasing reproductive success of the shade-intolerant Pinus ponderosa relative to Pseudotsuga menziesii.  Accession Code: VB.CC.19996.PSEUDOTSUGAMENZ Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Pseudotsuga menziesii Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Douglas-fir / Ross' Sedge Forest   UID: ELEMENT_GLOBAL.2.684819 NatureServe Explorer   Scientific: Pseudotsuga menziesii / Carex rossii Forest   Code: CEGL000431 (convergence) and Synonyms: (undetermined) Abies concolor - Pseudotsuga menziesii / Carex rossii Forest