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CEGL003621 Cercocarpus montanus var. glaber - Adenostoma fasciculatum Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Birchleaf Mountain-mahogany - Chamise Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This woodland/shrubland association occurs in southern California on somewhat steep to steep northwest-facing slopes at low elevations between 154 and 618 m. It is characterized by a codominance of Cercocarpus montanus var. glaber and Adenostoma fasciculatum in the shrub layer. Melica imperfecta occurs regularly in many of the stands at low cover in the herbaceous layer. The emergent tree layer includes Quercus agrifolia.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Interestingly, two recent studies of the vegetation of western Riverside County (Klein and Evens 2006) and San Dieguito River watershed (Evens and San 2006) failed to find this particular association.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: In the Santa Monica Mountains, stands of this shrubland form an intermittent shrub layer (35-52%, mean 43.7%). Shrubs occur in two different strata, with low shrubs 0.5-2 m tall and tall shrubs 1-5 m tall. The herbaceous layer is open (0-20%, mean 4.9%) at 0-2 m tall. Trees are occasionally emergent (0-4% cover, mean 0.9%) with hardwoods 0-10 m tall. Total vegetation cover is 35-60%; mean cover is 49.8%. In this association, the shrub layer is characterized by Adenostoma fasciculatum, Cercocarpus montanus var. glaber (= Cercocarpus betuloides), Heteromeles arbutifolia, and Malosma laurina. Salvia mellifera is often present, and Quercus berberidifolia is occasionally included in this layer. The tree layer is emergent and open and infrequently includes Quercus agrifolia at low cover. The herbaceous layer is simple and may include Melica imperfecta, Phacelia sp., Brassica nigra, Bromus madritensis, Bromus diandrus, Marah macrocarpus, and Centaurea melitensis. Elsewhere it is similar to description for the Santa Monica Mountains. The two main species of the association are regularly codominant, and there is usually some Eriogonum fasciculatum present (Gordon and White 1994).
Dynamics: No Data Available
Environmental Description: It occurs on low to moderately high elevations on moderately steep to steep, southeast- to northeast-facing slopes. Geologic substrate is usually granitic, and the soil group is usually Alfisols.
Geographic Range: This association is known from the Santa Monica Mountains and other regions of southern California, including western San Gabriel and San Bernardino mountains, the San Jacinto Mountains, and the southern Peninsular Ranges.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.790530
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G4
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.B Temperate & Boreal Grassland & Shrubland Subclass | S18 | 2.B |
| Formation | 2.B.1 Mediterranean Scrub & Grassland Formation | F038 | 2.B.1 |
| Division | 2.B.1.Na Californian Scrub & Grassland Division | D327 | 2.B.1.Na |
| Macrogroup | 2.B.1.Na.1 Chamise - Whiteleaf Manzanita - Scrub Oak Chaparral Macrogroup | M043 | 2.B.1.Na.1 |
| Group | 2.B.1.Na.1.b Scrub Oak - Eastwood''s Manzanita - California Ash Chaparral Group | G261 | 2.B.1.Na.1.b |
| Alliance | A0587 Birchleaf Mountain-mahogany Mesic Chaparral Alliance | A0587 | 2.B.1.Na.1.b |
| Association | CEGL003621 Birchleaf Mountain-mahogany - Chamise Shrubland | CEGL003621 | 2.B.1.Na.1.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Cercocarpus betuloides-Adenostoma fasciculatum Shrubland Association (Keeler-Wolf and Evens 2006)
= Cercocarpus montanus - Adenostoma fasciculatum (Sawyer et al. 2009) [76.100.06]
= Cercocarpus montanus var. glaber - Adenostoma fasciculatum Shrubland (Gordon and White 1994)
= Cercocarpus montanus - Adenostoma fasciculatum (Sawyer et al. 2009) [76.100.06]
= Cercocarpus montanus var. glaber - Adenostoma fasciculatum Shrubland (Gordon and White 1994)
- Evens, J., and S. San. 2006. Vegetation alliances of the San Dieguito River Park region, San Diego County, California. Final report (August 2005) Version 2 (revised May 2006). Prepared by California Native Plant Society in cooperation with the California Natural Heritage Program of the California Department of Fish and Game and San Diego Chapter of the California Native Plant Society. Sacramento, CA. 271 pp.
- Gordon, H. J., and T. C. White. 1994. Ecological guide to the southern California chaparral plant series. Technical Report R5-ECOL-TP-005. USDA Forest Service, Pacific Southwest Region, San Francisco, CA.
- Keeler-Wolf, T., and J. Evens. 2006. Vegetation classification of the Santa Monica Mountains National Recreation Area and environs in Ventura and Los Angeles counties, California. A report submitted to National Park Service, Santa Monica Mountains National Recreation Area by California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch and The California Native Plant Society, Vegetation Program, Sacramento, CA.
- Klein, A., and J. Evens. 2006. Vegetation alliances of western Riverside County, California. Contract Number: P0185404. Final report prepared for The California Department of Fish and Game, Habitat Conservation Division. California Native Plant Society, Sacramento, CA. 332 pp. [http://www.dfg.ca.gov/biogeodata/vegcamp/pdfs/VegMappingRpt_Western_Riverside.pdf]
- 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.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.