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Prosopis glandulosa / Bromus rubens - Eragrostis lehmanniana Desert Ruderal Scrub & Grassland Macrogroup | NatureServe Biotics 2019
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Name: Prosopis glandulosa / Bromus rubens - Eragrostis lehmanniana Desert Ruderal Scrub & Grassland Macrogroup Reference: NatureServe Biotics 2019 Description: This macrogroup contains disturbed warm, semi-arid grasslands and desert thornscrub that occur in the southwestern U.S. and northern Mexico. Vegetation of the macrogroup can be a monoculture of a single non-native graminoid species, or a mix of several non-native forbs and graminoids. Perennial graminoids include <i>Eragrostis curvula, Eragrostis lehmanniana, Pennisetum ciliare, Pennisetum setaceum, Sorghum halepense</i> (mesic sites), and several other species (which have been purposefully seeded to prevent soil erosion or for livestock forage), and/or invasive non-native annual species such <i>Brassica tournefortii, Bromus rubens, Schismus arabicus</i>, and <i>Schismus barbatus</i>. Numerous other non-native herbaceous species may be present to dominant. Dense stands of native ruderal species such as <i>Amaranthus palmeri</i> or <i>Solanum elaeagnifolium</i> resulting from anthropomorphic disturbance are also included in this macrogroup. This macrogroup includes upland desert scrub strongly dominated by invasive native species (<i>Prosopis glandulosa</i> and <i>Prosopis velutina</i>) with &gt;95% relative cover and &gt;10% absolute shrub cover. <i>Prosopis</i> spp.-dominated stands that occur naturally (non-ruderal) in desert lowlands, drainages, washes and riparian areas (bosque) are excluded from this ruderal type. It also includes any desert scrub with an exotic species-dominated understory (&gt;90% relative cover) in the herbaceous layer. Invasive non-native shrublands are less common. Stands occur on flat to moderately steep ground and can vary from large areas (100+ hectares) to narrow strips adjacent to roadsides or under powerlines and other disturbed areas. <i>Eragrostis curvula</i>- and <i>Eragrostis lehmanniana</i>-dominated stands resulting from artificial seeding as part of grassland restoration projects may be exceptionally large. Soils are variable, but are mostly well-drained. Disturbed soils may be compacted and eroded.  Accession Code: urn:lsid:vegbank.org:commConcept:40811-{72212EC1-C209-4691-B150-5BD174355B80} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 06-Nov-2015 to: ongoing
	status: accepted Community's Parent: Acacia greggii - Cylindropuntia leptocaulis - Muhlenbergia porteri North American Warm Desert Scrub & Grassland Division This Community's Level: Macrogroup This Community's Children: Show/Hide   Eragrostis lehmanniana - Bromus rubens - Brassica tournefortii Warm Desert Ruderal Grassland Group   Prosopis glandulosa - Prosopis velutina Warm Desert Ruderal Scrub Group		Names:   UID: ELEMENT_GLOBAL.2.879242 NatureServe Explorer   Code: M512   Scientific: Prosopis glandulosa / Bromus rubens - Eragrostis lehmanniana Desert Ruderal Scrub & Grassland Macrogroup