Print Report
CEGL002867 Quercus agrifolia - Juglans californica Riparian Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: California Live Oak - Southern California Walnut Riparian Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is only known from the Santa Monica Mountains region. This woodland association occurs on moderately steep to very steep slopes with variable aspects at low elevations between 58 and 869 m. It is dominated by Quercus agrifolia and Juglans californica in the tree layer. Toxicodendron diversilobum is characteristic in the understory shrub layer. A variety of grasses and forbs occur in the herbaceous layer with Leymus condensatus most frequently occurring.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is largely endemic to the Santa Monica Mountains and immediate surroundings. It is differentiated from others of this alliance by the constant presence of Juglans californica as a sub- or occasionally codominant. Also as a general note, cover values of Juglans are likely to average higher than recorded because some sampling was done during periods when the leaves of this deciduous species were largely absent. Two phases have been identified: one with little understory shrubs or herbs, and another with high cover of Toxicodendron diversilobum. They are Quercus agrifolia - Juglans californica (Coast Live Oak - California Walnut) Phase [1115] and Juglans californica - Quercus agrifolia / Toxicodendron diversilobum (California Walnut - Coast Live Oak / Poison Oak) Phase [6311].
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 an open to continuous tree layer (0-72%, mean 36.5%) with hardwoods at 5-15 m tall, a sparse to intermittent shrub layer (2-63%, mean 16.6%) at 0-10 m tall, and a sparse to intermittent herbaceous layer (0-46%, mean 7.3%) at 0-1 m tall. Total vegetation cover is 44-85%; mean cover is 58.3%. In this association, the tree layer is dominated by Quercus agrifolia and Juglans californica. Umbellularia californica is infrequently included in this layer at low cover. The shrub layer is sparse to intermittent and is characterized by Toxicodendron diversilobum, usually with highest cover. Heteromeles arbutifolia and other shrubs, such as Sambucus nigra ssp. cerulea (= Sambucus mexicana), Artemisia californica, and Diplacus aurantiacus (= Mimulus aurantiacus), are often found at lower cover. The herbaceous layer is diverse, with Leymus condensatus often present, and various herbs (many invasive exotics) occasionally present, such as Marrubium vulgare, Bromus sp., Piptatherum miliaceum, and Brassica nigra.
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 only known from the Santa Monica Mountains region. Information about its global distribution is not available without additional inventory.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.788730
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G3
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.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Nd Western North American Interior Flooded Forest Division | D013 | 1.B.3.Nd |
| Macrogroup | 1.B.3.Nd.2 Interior Warm & Cool Desert Riparian Forest Macrogroup | M036 | 1.B.3.Nd.2 |
| Group | 1.B.3.Nd.2.b Western Interior Riparian Forest & Woodland Group | G797 | 1.B.3.Nd.2.b |
| Alliance | A3750 California Sycamore - California Live Oak - Southern California Walnut Riparian Woodland Alliance | A3750 | 1.B.3.Nd.2.b |
| Association | CEGL002867 California Live Oak - Southern California Walnut Riparian Woodland | CEGL002867 | 1.B.3.Nd.2.b |
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 - Juglans californica (Sawyer et al. 2009) [71.060.27]
= Quercus agrifolia-Juglans californica Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Quercus agrifolia-Juglans californica Woodland/Forest Association (Keeler-Wolf and Evens 2006)
- 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.