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Acacia greggii Wash Shrubland | Western Ecology Working Group of...
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Name: Acacia greggii Wash Shrubland Reference: Western Ecology Working Group of... Description: This catclaw acacia shrubland association is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It occurs in drainage channels, along ephemeral washes, and in valley bottoms at 425 to 1100 m (1350-3700 feet) elevation. It typically occurs on gentle gradients (1-4°) and seems to favor south- and west-facing exposures, although it occurs across all aspects. Occasionally, this community occurs outside of washes, on benches, terraces, or sideslopes, often on low levels, interfluves, toeslopes, and step-in-slopes. Soils are predominantly well-drained sandy loams. The tall shrub <i>Acacia greggii</i> dominates and characterizes this community and accounts for the increased cover in denser stands. Other scattered tall shrubs such as <i>Larrea tridentata, Prosopis glandulosa</i>, and <i>Chilopsis linearis</i> occasionally occur. <i>Encelia farinosa</i> and <i>Ephedra fasciculata</i> commonly occur in the short-shrub layer, while <i>Bebbia juncea</i> occurs in some stands. Approximately 40 different short-shrub species can occur at relatively low individual covers. The dwarf-shrub component is fairly sparse and species composition is variable; <i>Gutierrezia sarothrae</i> and <i>Porophyllum gracile</i> occur most frequently among the roughly 25 species that can occur in this stratum. The exotic <i>Bromus rubens</i> comprises the majority of the graminoid understory, while <i>Aristida purpurea</i> occasionally occurs. <i>Sphaeralcea grossulariifolia, Allionia incarnata, Artemisia ludoviciana, Funastrum cynanchoides, Descurainia pinnata</i>, and <i>Lepidium montanum</i> are the most frequent members of the variable forb understory.  Accession Code: VB.CC.31658.CEGL005390 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.841776 NatureServe Explorer   Translated: Catclaw Acacia Wash Shrubland   Scientific: Acacia greggii Wash Shrubland   Code: CEGL005390