Login | Datasets | Logout
 

View Community Concepts - Detail

A.1545 | EcoArt 2002
  click to update datacart
Name: A.1545
Reference: EcoArt 2002
Description: The single plant association in this alliance is described from Grand Canyon National Park in northwestern Arizona. The climate is semi-arid. Total mean annual precipitation is approximately 50 cm along the western south rim. About half of the precipitation falls as snow in winter and half as rain in July to August. Sites occur on the top of the Grand Wash Cliffs (elevation 1430-1580 m) where pockets of soil accumulate in level swales. Soil is silty loam derived from Kaibab Limestone. Vegetation is dominated by graminoids with sparse microphyllous evergreen and deciduous shrubs and dwarf-shrubs, all less than 1 m in height. Total vegetation ground cover is 15-30%. The various short- and midgrass species tend to occur in patches. Characteristic species include ~Bouteloua eriopoda, Gutierrezia sarothrae, Krascheninnikovia lanata, Atriplex canescens$, and ~Sphaeralcea$ spp. Other prominent species are ~Aristida purpurea var. fendleriana, Coleogyne ramosissima, Pleuraphis rigida (= Hilaria rigida), Scleropogon brevifolius, Lycium andersonii, Aster$ spp., ~Achnatherum hymenoides (= Oryzopsis hymenoides)$, and ~Dasyochloa pulchella (= Erioneuron pulchellum)$. The various short- and midgrass species tend to have a patchy distribution, whereas the shrubs and dwarf-shrubs are scattered throughout. 
Accession Code: VB.CC.1305.A1545
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: V.A.7.N.j
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: BOUTELOUA ERIOPODA MICROPHYLLOUS EVERGREEN SHRUB HERBACEOUS ALLIANCE
  Code: A.1545
  Common: Black Grama Microphyllous Evergreen Shrub Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Bouteloua eriopoda Microphyllous Evergreen Shrub Herbaceous Alliance