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Agropyron cristatum - Bromus tectorum - Sisymbrium altissimum Western North American Ruderal Semi-Desert Scrub & Grassland Macrogroup | NatureServe Biotics 2019
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Name: Agropyron cristatum - Bromus tectorum - Sisymbrium altissimum Western North American Ruderal Semi-Desert Scrub & Grassland Macrogroup
Reference: NatureServe Biotics 2019
Description: This macrogroup contains disturbed grasslands and scrub found in semi-desert basins, piedmonts, and foothills throughout the western U.S. and Canada, possibly extending into lower montane zones on warm aspects. 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. Dominant graminoids include <i>Agropyron cristatum</i> (which has been purposefully seeded for forage or to prevent soil erosion, but has become naturalized), <i>Bromus tectorum</i> (an annual prolific seed-producer and highly invasive grass species), and <i>Bromus arvensis</i>. Invasive and wind- and animal-distributed non-native forb species include <i>Descurainia sophia, Erodium cicutarium, Halogeton glomeratus, Sisymbrium altissimum</i>, and <i>Zygophyllum fabago</i>. Numerous other non-native herbaceous species may be present to dominant. Invasive non-native shrublands are less common. This macrogroup can also include vegetation dominated by native ruderal species when vegetation is the result of anthropomorphic disturbance. These are dry grasslands, forb-dominated meadows or shrublands that occur in cool semi-arid climates. Stands occur on flat to moderately steep ground that can be large areas or narrow strips adjacent to roadsides or under powerlines and other disturbed areas. Soils are mostly mineral and well-drained. Soils may be compacted and eroded with biological crusts absent because of disturbance. 
Accession Code: urn:lsid:vegbank.org:commConcept:40799-{49193539-7CF2-4936-8C1F-2BA0D9367441}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 15-Oct-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.873846 NatureServe ExplorerNatureServe Explorer logo
  Code: M499
  Scientific: Agropyron cristatum - Bromus tectorum - Sisymbrium altissimum Western North American Ruderal Semi-Desert Scrub & Grassland Macrogroup