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Classification
Scientific Name: Northern and Central California Dry-Mesic Chaparral
Unique Identifier: CES206.931
Classification Confidence: 2 - Moderate

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Summary: This ecological system includes chaparral typically located inland from maritime chaparral up to 1500 m (4550 feet) elevation in central and northern California through the northern end of the Central Valley and north into Oregon. This system includes extensive areas on coarse-grained soils with annual precipitation up to 75 cm (winter rain but not snow). Adjacent fine-textured soils support savanna under similar climatic regimes. These areas have supported extensive stand-replacing wildfires. This system is made up of a mixture of mostly obligate seeders. Characteristic species include Adenostoma fasciculatum, Ceanothus cuneatus, Arctostaphylos viscida, Arctostaphylos manzanita, Arctostaphylos glauca, Arctostaphylos glandulosa, Arctostaphylos stanfordiana, Fremontodendron californicum, Malacothamnus fasciculatus, Dendromecon rigida, and Pickeringia montana. Common shrubs in Oregon include Arctostaphylos viscida, Cercocarpus montanus var. glaber, and Ceanothus cordulatus. Fire regimes are intense, stand-replacing crown fires. Scattered and young trees may occur, such as Pinus ponderosa, Pinus sabiniana, Pseudotsuga menziesii, and Quercus wislizeni.

Classification Approach: International Terrestrial Ecological Systems Classification (ITESC)


Component Associations
Association Unique ID Association Name
CEGL003008 Arctostaphylos glauca Shrubland
CEGL003025 Ceanothus cuneatus Shrubland
CEGL003158 Ceanothus cuneatus / Poaceae Shrubland
CEGL003176 Adenostoma fasciculatum - Arctostaphylos glandulosa - Ceanothus jepsonii / Calamagrostis ophitidis Shrubland
CEGL003177 Adenostoma fasciculatum - Arctostaphylos glandulosa - Quercus wislizeni Shrubland
CEGL003178 Adenostoma fasciculatum - Diplacus aurantiacus Shrubland
CEGL003180 Arctostaphylos glandulosa - Quercus wislizeni Shrubland
CEGL003468 Adenostoma fasciculatum - Ceanothus cuneatus Sierran Chaparral Shrubland
CEGL005816 Adenostoma fasciculatum Sierran Chaparral Shrubland
CEGL005817 Arctostaphylos viscida Sierran Chaparral Shrubland



Classifiers

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

Diagnostic Classifiers
Primary Classifier Secondary Classifier
Mediterranean Mediterranean Xeric-Oceanic
Sand Soil Texture  
Ustic  
Intermediate Disturbance Interval  
F-Landscape/High Intensity  
Ceanothus cuneatus, Adenostoma fasciculatum  

Non-diagnostic Classifiers
Primary Classifier Secondary Classifier
Montane Lower Montane
Lowland Foothill
Lowland Lowland
Shrubland (Shrub-dominated)  
Sideslope  
Xeric  

At-Risk Species Reported for this Ecological System
Scientific Name
  (Common Name)
NatureServe Global Status U.S. Endangered Species Act Status
Arctostaphylos stanfordiana
  (Stanford's Manzanita)
G3  
Fritillaria gentneri
  (Gentner's Fritillary)
G1 LE: Listed endangered
Limnanthes floccosa ssp. bellingeriana
  (Bellinger's Meadowfoam)
G4T3  
Plagiobothrys figuratus ssp. corallicarpus
  (Coral-seeded Allocarya)
G4T1  

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Char-
acter-
istic
Domi-nant Con-stant
Cover Class %
Con-
stancy
%
Adenostoma fasciculatum G5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Arctostaphylos glandulosa G5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Arctostaphylos viscida G5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Ceanothus cuneatus G5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Fritillaria gentneri G1 Flowering forb Herb (field)      
 
 
Limnanthes floccosa ssp. bellingeriana T3 Flowering forb Herb (field)      
 
 
Plagiobothrys figuratus ssp. corallicarpus T1 Flowering forb Herb (field)      
 
 


Animal Species Reported for this Ecological System
Scientific Name
  (Common Name)
Global Status U.S. Endangered Species Act Status Charact-
eristic
Exotic
Chamaea fasciata
  (Wrentit)
G5      


Distribution
Color legend for Distribution Map
Nation: United States
United States Distribution: CA, OR
Global Range: This system is located inland from maritime chaparral up to 1500 m (4550 feet) elevation in central and northern California, and southwestern Oregon, through the north end of the California Central Valley.

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
12 Sierra Nevada Confident or certain
13 Great Central Valley Confident or certain
14 California North Coast Confident or certain
15 California Central Coast Predicted or probable
5 Klamath Mountains Predicted or probable

MRLC 2000 Mapzones
Code Name Occurrence Status
2 Oregon Coastal Range Confident or certain
3 Northern California Coastal Range Confident or certain
4 Southern California Coastal Range Confident or certain
5 California Central Valley Confident or certain
6 Sierra Nevada Mountain Range Confident or certain
7 Cascade Mountain Range Confident or certain

National Mapping
ESLF Code (Ecological System Lifeform): 5311
ESP Code (Environmental Site Potential): 1105
EVT Code (Existing Vegetation Type): 2105

West Landfire Legend: Yes
East Landfire Legend: No

Authors/Contributors
Element Description Edition Date: 12Jan2012
Element Description Author(s): P. Comer, T. Keeler-Wolf, M.S. Reid and G. Kittel

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


References
  • 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.

  • 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.

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

  • 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.


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Data last updated: March 2019