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Pseudotsuga menziesii - Quercus chrysolepis Forest | NatureServe Biotics 2019
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Name: Pseudotsuga menziesii - Quercus chrysolepis Forest
Reference: NatureServe Biotics 2019
Description: This association is known from the Shasta-Trinity National Forest in the Klamath Province of northwestern California and Yosemite National Park in the Sierra Nevada. This association is widespread in the Klamath Province, occurring at low elevations (below 1370 m [4500 feet]) on north-facing slopes, but shifting to southerly exposures at higher elevations (between 1370-1675 m [4500-5500 feet]). The substrate is all pre-Cretaceous metamorphic rock, and the soils are largely Sheetiron-Josephine complex with annual precipitation averaging about 1018 mm (40 inches). Stands at Yosemite are found at mesic sites with some cold-air drainages, on low to mid elevations (1220-1615 m [4000-5300 feet]). Aspects are generally northerly but can be trending south (northeast to west) at its highest elevations in semi-protected locations. Often associated with riparian drainages, these sites are on moderate to somewhat steep (6-26°), convex slopes. Soil development is minimal with shallow to medium depths, and textures are mostly stony but range from stony to clay and of granitic parent material. Penetrability is easy to difficult.<br /><br />Stands in the southern Klamath Province are dominated by <i>Pseudotsuga menziesii</i> and <i>Quercus chrysolepis</i>. Other species such as <i>Arbutus menziesii</i> and <i>Acer macrophyllum</i> are common, while they are rare or absent in the local stands of this association. Stands of this forest at Yosemite are dominated by <i>Pseudotsuga menziesii</i> and <i>Quercus chrysolepis</i>. <i>Calocedrus decurrens, Umbellularia californica, Pinus ponderosa</i>, and <i>Quercus kelloggii</i> are often present in the tree canopy. Other species that may be present include <i>Abies lowiana, Alnus rhombifolia, Alnus incana, Acer macrophyllum, Cornus nuttallii, Rhododendron occidentale, Toxicodendron diversilobum, Ceanothus integerrimus, Corylus cornuta, Arctostaphylos viscida, Arctostaphylos patula</i>, and <i>Pteridium aquilinum</i>. Stands in the Klamath Ecoregion differ somewhat from the local Yosemite stands. Thus, this association may actually be found to be different although the two main species are the same. 
Accession Code: urn:lsid:vegbank.org:commConcept:34470-{FF66FE85-41C9-44C2-8B5C-DB58FFEE37F7}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 06-May-2010 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.688346 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL005814
  Translated: Douglas-fir - Canyon Live Oak Forest
  Scientific: Pseudotsuga menziesii - Quercus chrysolepis Forest
(convergence) and Synonyms:
(similar) Pseudotsuga menziesii - Quercus chrysolepis Forest
(similar) Pseudotsuga menziesii - Quercus chrysolepis Forest