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Classification
Scientific Name: California Coastal Live Oak Woodland and Savanna
Unique Identifier: CES206.937
Classification Confidence: 2 - Moderate

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Summary: These Quercus agrifolia-dominated woodlands occur throughout the Pacific coastal areas from Sonoma County, California, south to Baja California. Occurrences vary in canopy cover from dense conditions that support sparse understory vegetation of Rubus ursinus, Symphoricarpos mollis, Heteromeles arbutifolia, and Toxicodendron diversilobum, to more open conditions with perennial bunchgrass understory. The latter typically occur on south-facing slopes with soils of variable depth. 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.).

Classification Approach: International Terrestrial Ecological Systems Classification (ITESC)


Component Associations
Association Unique ID Association Name
CEGL003169 Quercus agrifolia / Toxicodendron diversilobum - (Corylus cornuta) Woodland



Classifiers

Land Cover Class: Steppe/Savanna
Spatial Pattern: Large patch
Natural/Seminatural: No
Vegetated ( > 10% vascular cover):
Upland: Yes
Wetland: No
Isolated Wetland: No

Diagnostic Classifiers
Primary Classifier Secondary Classifier
Woody-Herbaceous  
Sideslope  
Mediterranean Mediterranean Xeric-Oceanic
Xeric  
F-Patch/Medium Intensity  
Broad-Leaved Evergreen Tree  
Quercus agrifolia  

Non-diagnostic Classifiers
Primary Classifier Secondary Classifier
Lowland Foothill
Lowland Lowland
Forest and Woodland (Treed)  
Ustic  
Intermediate Disturbance Interval  
Graminoid  

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Char-
acter-
istic
Domi-nant Con-stant
Cover Class %
Con-
stancy
%
Quercus agrifolia G5 Broad-leaved evergreen tree Tree canopy  
 
 
Umbellularia californica G5 Broad-leaved evergreen tree Tree canopy    
 
 
Rubus ursinus G5 Broad-leaved deciduous shrub Shrub/sapling (tall & short)    
 
 
Symphoricarpos mollis G5 Broad-leaved deciduous shrub Short shrub/sapling    
 
 
Toxicodendron diversilobum G5 Liana Herb (field)    
 
 


Distribution
Color legend for Distribution Map
Nation: United States
United States Distribution: CA
Distribution Outside Canada and the United States: Mexico
Global Range: Pacific coastal areas from Sonoma County, California, south to Baja California.

Biogeographic Divisions
Division Code and Name Primary Occurrence Status
206-Mediterranean California C: Confident or certain

The Nature Conservancy's Conservation Ecoregions
Code Name Occurrence Status
15 California Central Coast Confident or certain
16 California South Coast Confident or certain

MRLC 2000 Mapzones
Code Name Occurrence Status
3 Northern California Coastal Range Confident or certain
4 Southern California Coastal Range Confident or certain
5 California Central Valley Possible

National Mapping
ESLF Code (Ecological System Lifeform): 5402
ESP Code (Environmental Site Potential): 1113
EVT Code (Existing Vegetation Type): 2113

West Landfire Legend: Yes
East Landfire Legend: No

Authors/Contributors
Element Description Edition Date: 14Jan2014
Element Description Author(s): P. Comer, T. Keeler-Wolf, M.S. Reid

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Allen-Diaz, B., R. Standiford, and R. D. Jackson. 2007. Oak woodlands and forests. Pages 313-338 in: M. G. Barbour, T. Keeler-Wolf, and A. Schoenherr, editors. Terrestrial vegetation of California. Third edition. University of California Press, Berkeley, CA.

  • Barbour, M. G., and J. Major, editors. 1988. Terrestrial vegetation of California: New expanded edition. California Native Plant Society, Special Publication 9, Sacramento. 1030 pp.

  • Barbour, M. G., and W. D. Billings, editors. 2000. North American terrestrial vegetation. Second edition. Cambridge University Press, New York. 434 pp.

  • Callaway, R. M., and F. W. Davis. 1993. Vegetation dynamics, fire, and the physical-environment in coastal Central California. Ecology 74(5):1567-1578.

  • Callaway, R. M., and F. W. Davis. 1998. Recruitment of Quercus agrifolia in central California: The importance of shrub-dominated patches. Journal of Vegetation Science 9(5):647-656.

  • Comer, P., D. Faber-Langendoen, R. Evans, S. Gawler, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, K. Snow, J. Teague, and R. White. 2003-present. Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, VA.

  • Davis, F. W., and M. I. Borchert. 2006. Central Coast bioregion. Pages 321-349 in: N. G. Sugihara, J. W. van Wagtendonk, K. E. Shaffer, J. Fites-Kaufman, and A. E. Thode, editors. Fire in California's ecosystems. University of California Press, Berkeley.

  • Eyre, F. H., editor. 1980. Forest cover types of the United States and Canada. Society of American Foresters, Washington, DC. 148 pp.

  • Holland, V. L., and D. J. Keil. 1995. California vegetation. Kendall/Hunt Publishing Company, Dubuque, IA. 516 pp.

  • Keeley, J. E. 2002. Native American impacts on fire regimes of the California coastal ranges. Journal of Biogeography 29:303-320.

  • Landfire [Landfire National Vegetation Dynamics Database]. 2007a. Landfire National Vegetation Dynamics Models. Landfire Project, USDA Forest Service, U.S. Department of Interior. (January - last update) [http://www.LANDFIRE.gov/index.php] (accessed 8 February 2007).

  • Mensing, S. A. 1998. 560 years of vegetation change in the region of Santa Barbara, California. Madrono 45:1-11.

  • PRBO Conservation Science. 2011. Projected effects of climate change in California: Ecoregional summaries emphasizing consequences for wildlife. Version 1.0. PRBO Conservation Science, Petaluma, CA. [http://data.prbo.org/apps/bssc/climatechange]

  • Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.

  • Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native Plant Society, Sacramento. 471 pp.

  • Shiflet, T. N., editor. 1994. Rangeland cover types of the United States. Society for Range Management. Denver, CO. 152 pp.

  • Steinberg, P. D. 2002b. Quercus agrifolia. In: Fire Effects Information System [Online]. USDA Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). [http://www.fs.fed.us/database/feis] (accessed June 27, 2006).

  • Sugihara, N. G., J. W. van Wagtendonk, K. E. Shaffer, J. Fites-Kaufman, and A. E. Thode, editors. 2006. Fire in California's ecosystems. University of California Press, Berkeley.

  • Van Dyke, E., K. D. Holl, and J. R. Griffen. 2001. Maritime chaparral community transition in the absence of fire. Madrono 48:221-229.

  • WNHP [Washington Natural Heritage Program]. 2011. Ecological integrity assessments for the ecological systems of Washington. Version: 2.22.2011. Washington Natural Heritage Program, Department of Natural Resources, Olympia. [http://www1.dnr.wa.gov/nhp/refdesk/communities/eia_list.html] (accessed September 9, 2013).

  • Wills, R. 2006. Central Valley bioregion. Pages 295-320 in: N. G. Sugihara, J. W. van Wagtendonk, K. E. Shaffer, J. Fites-Kaufman, and A. E. Thode, editors. Fire in California's ecosystems. University of California Press, Berkeley.


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