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CEGL000069 Pseudotsuga menziesii / Mahonia aquifolium Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Douglas-fir / Hollyleaf Barberry Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This forest association of the central and eastern Siskiyou Mountains grows between 540-1525 m of elevation on southern aspects. Stands occupy all slope positions and topography. Sites are very warm and dry. Parent materials are metavolcanics and metasediments. Pseudotsuga menziesii dominates the overstory tree canopy, with a much smaller percentage of Pinus ponderosa. The tree understory contains Pseudotsuga menziesii, Arbutus menziesii and/or Quercus kelloggii. Mahonia aquifolium and Toxicodendron diversilobum are the most constant shrub species. Ceanothus integerrimus invades sites that have been disturbed or burned.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association was defined using 12 ecological plots.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Pseudotsuga menziesii dominates the overstory tree canopy, with a much smaller percentage of Pinus ponderosa. The tree understory contains Pseudotsuga menziesii, Arbutus menziesii and/or Quercus kelloggii. Mahonia aquifolium (= Mahonia piperiana) and Toxicodendron diversilobum are the most constant shrub species. Ceanothus integerrimus invades sites that have been disturbed or burned.
Dynamics: No Data Available
Environmental Description: This forest association grows between 540-1525 m of elevation on southern aspects. Stands occupy all slope positions and topography. Sites are very warm and dry. Parent materials are metavolcanics and metasediments.
Geographic Range: This association is only known from the central and eastern Siskiyou Mountains in southwestern Oregon, but possibly occurs in northern California.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.687683
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.2 Cool Temperate Forest & Woodland Formation | F008 | 1.B.2 |
| Division | 1.B.2.Nd Vancouverian Forest & Woodland Division | D192 | 1.B.2.Nd |
| Macrogroup | 1.B.2.Nd.1 Southern Vancouverian Dry Foothill Forest & Woodland Macrogroup | M886 | 1.B.2.Nd.1 |
| Group | 1.B.2.Nd.1.a Southern Vancouverian Dry Douglas-fir - Madrone Woodland Group | G800 | 1.B.2.Nd.1.a |
| Alliance | A3716 Douglas-fir - Grand Fir - Pacific Madrone Forest & Woodland Alliance | A3716 | 1.B.2.Nd.1.a |
| Association | CEGL000069 Douglas-fir / Hollyleaf Barberry Forest | CEGL000069 | 1.B.2.Nd.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- Atzet, T., and D. L. Wheeler. 1984. Preliminary plant associations of the Siskiyou Mountains Province, Siskiyou National Forest. USDA Forest Service, Pacific Northwest Region, Portland, OR.
- Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
- Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.