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CEGL000028 Abies lowiana / Taxus brevifolia Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Sierra White Fir / Pacific Yew Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This productive, tall conifer forest association is typically at found at moist sites, and when in good condition supports old trees and snags. It is known to occur in the Klamath-Siskiyou region of Oregon and possibly in the coastal range of Oregon and in northwestern California. Stands can be found at elevations of 630-1400 m (2060-4600 feet) on all aspects with slopes up to 78%. Parent material is generally alluvium or serpentine. Pseudotsuga menziesii and Abies lowiana dominate the tree layer. Taxus brevifolia and Abies lowiana dominate the tree understory. Mahonia nervosa, Achlys triphylla, and Linnaea borealis ssp. longiflora dominate the forest floor. Rosa gymnocarpa is found in all occurrences at low cover. High cover of moss indicates high moisture.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Atzet et al. (1996) re-classified this vegetation into three alternate associations, all of which are low elevation, productive and threatened types.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Pseudotsuga menziesii and Abies lowiana (= Abies concolor var. lowiana) dominate the tree layer. Taxus brevifolia and Abies lowiana dominate the tree understory. Mahonia nervosa (= var. nervosa), Achlys triphylla, and Linnaea borealis ssp. longiflora dominate the forest floor. Rosa gymnocarpa is found in all occurrences at low cover (3%). High cover of moss (59%) indicates high moisture.
Dynamics: No Data Available
Environmental Description: This productive, tall conifer forest association is typically at found at moist sites, and when in good condition supports old trees and snags. It is known to occur in the Klamath-Siskiyou region of Oregon and possibly in the coastal range of Oregon and in northwestern California. Stands can be found at elevations of 630-1400 m (2060-4600 feet) on all aspects with slopes up to 78%. Parent material is generally alluvium or serpentine.
Geographic Range: Restricted to southwestern Oregon, although possibly found in adjacent northwestern California.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.683079
Confidence Level: Low
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.2 Incense-cedar - Jeffrey Pine - Sierra White Fir Forest Macrogroup | M023 | 1.B.2.Nd.2 |
| Group | 1.B.2.Nd.2.a Incense-cedar - Sugar Pine - Sierra White Fir Forest & Woodland Group | G344 | 1.B.2.Nd.2.a |
| Alliance | A3674 Sierra White Fir - Douglas-fir Coastal, Cascadian & Sierran Forest Alliance | A3674 | 1.B.2.Nd.2.a |
| Association | CEGL000028 Sierra White Fir / Pacific Yew Forest | CEGL000028 | 1.B.2.Nd.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: > Abies concolor - Taxus brevifolia Association (Atzet and Wheeler 1984)
- Atzet, T. A., D. E. White, L. A. McCrimmon, P. A. Martinez, P. R. Fong, and V. D. Randall. 1996. Field guide to the forested plant associations of southwestern Oregon. Technical Paper R6-NR-ECOL-TP-17-96. USDA Forest Service, Pacific Northwest Region, Portland, OR.
- 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.