Login | Datasets | Logout
 

View Community Concepts - Detail

A.2527 | EcoArt 2002
  click to update datacart
Name: A.2527
Reference: EcoArt 2002
Description: These extremely xeromorphic, succulent wooded grasslands of the Mojave Desert and southeastern Great Basin are found on alluvial fans, gentle to moderate slopes and ridgetops. Soil types and elevation limit the distribution of the vegetation. Soils are derived from colluvial or alluvial deposits and have variable textures, ranging from gravel or coarse sand to fine silt. Some stands have bimodal soils with both coarse- and fine-textured layers. The vegetation is characterized by an emergent (up to 13 m tall) and typically abundant ~Yucca brevifolia$ layer over a perennial graminoid-dominated understory layer. ~Yucca brevifolia$ must be evenly distributed with over 1% total cover (Keeler-Wolf and Thomas 2000). Emergent ~Pinus monophylla$ or ~Juniperus$ spp. may be present, but have less than 1% cover. Graminoid species may include ~Achnatherum hymenoides, Achnatherum speciosum, Muhlenbergia porteri, Pleuraphis jamesii$ (above 1400 m), ~Pleuraphis rigida$, or ~Poa secunda$. Scattered short shrubs and dwarf-shrubs (<2 m tall) are usually present and may form an intermittent canopy. They are usually associated with disturbance and include ~Ambrosia dumosa, Ericameria$ spp., ~Eriogonum fasciculatum, Gutierrezia microcephala, Hymenoclea salsola, Krascheninnikovia lanata, Lycium andersonii, Opuntia acanthocarpa, Sphaeralcea ambigua$, or ~Yucca baccata$. Forb cover is mostly from seasonal annuals. 
Accession Code: VB.CC.1790.A2527
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 28-Jun-2001 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: V.A.6.N.f
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: YUCCA BREVIFOLIA WOODED HERBACEOUS ALLIANCE
  Code: A.2527
  Common: Joshua Tree Wooded Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Yucca brevifolia Wooded Herbaceous Alliance