Name:
Bromus inermis - Centaurea spp. - Lepidium spp. Western North American Ruderal Grassland & Shrubland Macrogroup
Reference:
NatureServe Biotics 2019
Description:
This ruderal macrogroup occurs in temperate areas throughout the western North America and is composed of disturbed upland grasslands, meadows and shrublands dominated by non-native and generalist native species. It is abundant in waste areas and disturbed land in temperate areas throughout the western U.S. and southwestern Canada, including coastal areas, often as abandoned pastures, roadside margins or other weedy places. Sites are not mowed or otherwise maintained. Generally, these are areas that have been extremely disturbed by heavy equipment, such as old plowed fields, townsites, abandoned millsites, or livestock holding areas and other "waste" places that are now covered in invasive shrub or herbaceous species not native to western North America. Vegetation of the macrogroup can be a monoculture of a single non-native species, or a mix of several non-native forbs and graminoids, often associated with generalist native species. Graminoids include <i>Agrostis gigantea, Agrostis stolonifera, Bromus inermis, Dactylis glomerata, Elymus repens</i>, and <i>Poa pratensis</i> (which may have been purposefully seeded for forage or to prevent soil erosion). Numerous other non-native herbaceous species may be present to dominant, including <i>Agrostis capillaris, Anthoxanthum odoratum, Bromus hordeaceus</i>, and <i>Holcus lanatus</i>. Native grasses and forbs may be present with low cover, or sometime abundant if they are generalists or ruderal species. Invasive non-native shrublands are less common, but some may be dominated by <i>Alhagi maurorum, Cytisus striatus, Cytisus scoparius</i>, or <i>Rubus armeniacus</i>.
Accession Code:
urn:lsid:vegbank.org:commConcept:40795-{0BE26E09-413B-4FAF-A253-C5D19E663BD8}
Plot-observations of this Community Concept:
0
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