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Abies lowiana - Picea breweriana / Chimaphila umbellata Forest | NatureServe Biotics 2019
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Name: Abies lowiana - Picea breweriana / Chimaphila umbellata Forest
Reference: NatureServe Biotics 2019
Description: This highly variable coniferous forest association is found in southwestern Oregon and northwestern California between 1170-1525 m elevation. Stands grow on westerly and southwesterly aspects, on granitics, gabbro, and mixed metamorphic substrates. This association is more open than other associations in the area with large amounts (19%) of surface rock and bare ground (8%). This type is characterized by <i>Abies lowiana</i> and <i>Picea breweriana</i> in the overstory with the <i>Abies lowiana</i> attaining roughly 15% cover, and <i>Picea breweriana</i> about 5%. <i>Pinus lambertiana</i> and <i>Pseudotsuga menziesii</i> are both usually present in larger percentages than either of the indicator species. Total tree overstory canopy cover averages 75% cover. There seem to be two phases to this association: a warm phase and a cool phase. These phases are primarily differentiated by the tree understory species. Cooler sites contain <i>Abies lowiana, Abies magnifica var. shastensis, Chrysolepis chrysophylla, Picea breweriana</i>, and <i>Taxus brevifolia</i>. In the warm phase <i>Abies magnifica var. shastensis</i> is missing and <i>Symphoricarpos mollis</i> is found in the herbaceous layer. <i>Mahonia nervosa</i> and <i>Chimaphila umbellata</i> are the common shrub species. Fire is not common in this association, and fires that do occur tend to be low intensity. <i>Pinus lambertiana</i> can be very susceptible to blister rust. This type is the only <i>Abies lowiana</i> association with <i>Chimaphila umbellata</i> in the understory without <i>Gaultheria ovatifolia</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:28959-{29290F0E-64F0-4C58-B78A-758EFE183325}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 01-Feb-1994 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.686148 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000050
  Translated: Sierra White Fir - Brewer Spruce / Pipsissewa Forest
  Scientific: Abies lowiana - Picea breweriana / Chimaphila umbellata Forest
(convergence) and Synonyms:
(similar) CEGL000050
(similar) Abies concolor - Picea breweriana / Chimaphila umbellata Forest
(similar) Abies concolor - Picea breweriana / Chimaphila umbellata Forest