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CEGL002866 Quercus agrifolia / Toxicodendron diversilobum Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: California Live Oak / Pacific Poison-oak Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is known from parts of central and south coastal California. This woodland association occurs on gentle to steep slopes with variable aspects at low elevations between 40 and 577 m. It is dominated by Quercus agrifolia in the tree layer. Toxicodendron diversilobum is characteristic in the understory shrub layer, and a variety of grasses and forbs are in the herbaceous layer.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Several other Quercus agrifolia associations are characterized by the presence of Toxicodendron diversilobum. These include Quercus agrifolia / Toxicodendron diversilobum / Grass (Allen et al. 1991), Quercus agrifolia / Toxicodendron diversilobum - Riparian and Quercus agrifolia / Toxicodendron diversilobum / Grass (Evens and San 2006), and ~Quercus agrifolia / Toxicodendron diversilobum - (Corylus cornuta) Woodland (CEGL003169)$$. All of these have distinguishing biogeographic and environmental features which justify keeping these as separate associations.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Stands of this association at Santa Monica Mountains National Recreation Area form a sparse to continuous tree layer (5-74%, mean 31.8%) with conifers at 0-20 m tall and hardwoods at 2-35 m tall, a sparse to intermittent shrub layer (6-56%, mean 24.8%) at 0-10 m tall, and a sparse to open herbaceous layer (0-15%, mean 5.3%) at 0-2 m tall. Total vegetation cover is 38-90%; mean cover is 58.6%. In this association, the tree layer is dominated by Quercus agrifolia. The shrub layer is sparse to intermittent and is characterized by Toxicodendron diversilobum. Frequently, Diplacus aurantiacus (= Mimulus aurantiacus) and Heteromeles arbutifolia are also included. Malosma laurina, Artemisia californica, Salvia leucophylla, Sambucus nigra ssp. cerulea (= Sambucus mexicana), and Rhamnus ilicifolia are occasionally included in the shrub layer. The herbaceous layer is diverse and includes Leymus condensatus, Marah macrocarpus, Bromus diandrus, Piptatherum miliaceum, and Melica imperfecta.
Dynamics: Until further inventory is completed, there is no global information.
Environmental Description: Until further inventory is completed, there is no global information.
Geographic Range: This association is known from parts of central and south coastal California (Allen et al 1991).
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.788727
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.1 Warm Temperate Forest & Woodland Formation | F018 | 1.B.1 |
| Division | 1.B.1.Nc Californian Forest & Woodland Division | D007 | 1.B.1.Nc |
| Macrogroup | 1.B.1.Nc.1 California Live Oak - California Laurel - Western Cypress species Forest & Woodland Macrogroup | M009 | 1.B.1.Nc.1 |
| Group | 1.B.1.Nc.1.a California Live Oak - Valley Oak - California Laurel Forest & Woodland Group | G195 | 1.B.1.Nc.1.a |
| Alliance | A3346 California Live Oak Woodland Alliance | A3346 | 1.B.1.Nc.1.a |
| Association | CEGL002866 California Live Oak / Pacific Poison-oak Woodland | CEGL002866 | 1.B.1.Nc.1.a |
Concept Lineage: This placeholder has been replaced by several new types for SAMO.
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Quercus agrifolia / Toxicodendron diversilobum (Sawyer et al. 2009) [71.060.13]
= Quercus agrifolia/Toxicodendron diversilobum Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Coast Live Oak / Poison Oak (Allen et al. 1991)
= Quercus agrifolia/Toxicodendron diversilobum Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Coast Live Oak / Poison Oak (Allen et al. 1991)
- Allen, B. H., R. R. Everet, and B. A. Holzman. 1991. A classification system for California''s hardwood rangelands. Hilgardia 59:1-45.
- 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.
- 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.
- 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.