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Pinus edulis - Juniperus scopulorum / Holodiscus dumosus Woodland | NatureServe Biotics 2019
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Name: Pinus edulis - Juniperus scopulorum / Holodiscus dumosus Woodland
Reference: NatureServe Biotics 2019
Description: This woodland association is currently known from Black Canyon of the Gunnison, Curecanti National Recreation Area and Great Sand Dunes in Colorado and El Malpais National Monument in New Mexico. More survey and classification work are needed to fully characterize this type. The sampled Colorado stand occurs on a steep (100%), southwest-facing midslope on a ridge at 2303 m elevation. The unvegetated surface has moderate cover of litter and bedrock, large rocks, and small rocks. Downed wood is common. Substrate is a rapidly drained loamy sand soil derived from Black Canyon schist (mica schist). At El Malpais, this association occurs between about 2240 and 2390 m (7340-7850 feet) elevation on very gently rolling lava plateaus and collapse features, to steep slopes of cinder cones. Substrates are derived from basalt lava rock and cinders from cinder cone flows. Ground surface is made up of lava rock with abundant litter and occasional soil and coarse woody debris present. The vegetation is characterized by an open to moderately closed (30-60% cover) tree canopy 2-5 m tall codominated by <i>Pinus edulis</i> and <i>Juniperus scopulorum</i> with a short-shrub layer dominated by <i>Holodiscus dumosus</i>. The shrub layer is diverse in terms of species composition and provides low to moderate cover. Associated shrub species include <i>Cercocarpus montanus, Quercus gambelii, Artemisia tridentata, Philadelphus microphyllus, Pinus edulis</i> saplings, and <i>Artemisia frigida</i>. In New Mexico, <i>Ribes cereum</i> is common, and the cacti <i>Echinocereus coccineus</i> and <i>Opuntia polyacantha</i> are frequent associates, though cover is low. The herbaceous layer is low in species diversity and provides sparse to low cover. Species include <i>Achnatherum hymenoides, Arabis crandallii, Artemisia carruthii, Bouteloua gracilis, Descurainia incana, Poa fendleriana</i>, and <i>Senecio integerrimus</i>. Lichens and mosses can each provide low cover, up to 5%. 
Accession Code: urn:lsid:vegbank.org:commConcept:31704-{9FB3E0A0-D6ED-47A0-95E7-5DC806345CD4}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 24-May-2010 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.785187 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL002802
  Translated: Two-needle Pinyon - Rocky Mountain Juniper / Rockspirea Woodland
  Scientific: Pinus edulis - Juniperus scopulorum / Holodiscus dumosus Woodland
(convergence) and Synonyms:
(similar) Pinus edulis - Juniperus scopulorum / Holodiscus dumosus Woodland