Name:
Quercus lobata Woodland Alliance
Reference:
NatureServe Biotics 2019
Description:
<i>Quercus lobata</i> is the characteristic oak species of these savannas, though other species are present, including <i>Aesculus californica, Cercis canadensis var. texensis, Juniperus californica, Quercus agrifolia, Quercus douglasii</i>, and <i>Quercus wislizeni</i>. There is some evidence that much of the understory prior to the invasion by non-native annual grasses and forbs was composed of native annual herbs such as species of <i>Calycadenia, Daucus, Eriogonum, Gilia, Hemizonia, Holocarpha, Lessingia, Lotus, Lupinus, Navarretia</i>, and <i>Trifolium</i>. <i>Nassella pulchra</i> also was common. There is considerable seasonal and annual variation in cover of understory species due to phenology and intra-annual precipitation and temperature variation. Historically, these savannas occurred on alluvial terraces and flat plains, often with deep, fertile soils, throughout the California Central Valley from Lake Shasta south to Los Angeles County. This alliance is found from 10-1200 m (30-3600 feet) elevation, receiving on average 50 cm (range 25-100 cm) of precipitation per year, mainly as winter rain. Variable canopy densities in existing occurrences are likely due to variation in soil moisture regime, natural patch dynamics of fire, and land use (fire suppression, livestock grazing, herbivory, etc.).
Accession Code:
urn:lsid:vegbank.org:commConcept:38634-{2637F326-0E1A-4100-B818-96011D7F105D}
Plot-observations of this Community Concept:
0
|
