Name:
Avena fatua - Brassica nigra - Bromus diandrus Ruderal Grassland, Meadow & Scrub Macrogroup
Reference:
NatureServe Biotics 2019
Description:
This macrogroup encompasses the non-native-dominated annual or perennial grasslands, forblands and scrub found in the Californian chaparral region ("Mediterranean" California). Dominant introduced graminoid species include <i>Aegilops triuncialis, Avena barbata, Avena fatua, Brachypodium distachyon, Briza maxima, Bromus diandrus, Bromus hordeaceus, Bromus rubens, Cynosurus echinatus, Hordeum murinum, Lolium perenne ssp. multiflorum, Taeniatherum caput-medusae, Vulpia bromoides</i>, and <i>Vulpia myuros</i>. Introduced forb species include <i>Brassica nigra, Carduus pycnocephalus, Centaurea</i> spp., <i>Conium maculatum, Erodium botrys, Erodium cicutarium, Foeniculum vulgare, Geranium dissectum, Hypochaeris glabra</i>, and <i>Medicago polymorpha</i>. Species in non-native shrublands include <i>Acacia cyclops, Ulex europaeus, Cytisus scoparius</i>, and species of <i>Genista</i> and <i>Spartium</i>, among others. There are many more species that can be dominant. They occur on the coastal plains, in the Central Valley, in the foothills and in disturbed rural and urban areas. California annual grassland is found at a wide variety of soils, sometimes in complex mosaics. Most are noncalcic Mollisols, medium to heavy texture, about 0.5 m deep. Native graminoid and forb species can be present with low or insignificant cover. The overwhelming dominance of the introduced species is undeniable. Non-native species make up 50-96% of the foliar cover.
Accession Code:
urn:lsid:vegbank.org:commConcept:40467-{CBC31E36-3C49-4AD8-ACF9-6C094466928C}
Plot-observations of this Community Concept:
0
|
