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CEGL000013 Pseudotsuga menziesii - Abies lowiana / Gaultheria shallon Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Douglas-fir - Sierra White Fir / Salal Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: These forests occur mostly on the west side of the southern Oregon Cascades, but may also occur in California. Sites occur between 760-1520 m (2500-5000 feet) elevation on moderate slopes on all aspects. Most examples of this giant, low- to mid-elevation mixed-conifer forest association usually represent second- or third-growth logged forest stands. Old remnants are extremely rare. The tree canopy is codominated by Pseudotsuga menziesii, Calocedrus decurrens, Pinus lambertiana, and Abies lowiana. Shrub cover in most stands is very dense. Mahonia nervosa, Symphoricarpos mollis, Gaultheria shallon, Rosa gymnocarpa, and Rhododendron macrophyllum are common shrubs. Common herbs include Achlys triphylla, Linnaea borealis ssp. longiflora, Goodyera oblongifolia, Anemone deltoidea, and Synthyris reniformis. Grass cover is very low.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Data are from a limited area (Umpqua National Forest). Furthermore, Atzet et al. (1996) split most of their 17 plots into five alternate associations. The concept of this type is a moist, low elevation mixed conifer forest with evergreen shrubs dominating the understory. The summary states it is "giant" and perhaps should be moved to a Giant Forest Formation and Alliance.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The tree canopy is codominated by Pseudotsuga menziesii, Calocedrus decurrens, Pinus lambertiana, and Abies lowiana (= Abies concolor var. lowiana). Shrub cover averages 31-100%, and in most stands is very dense. Mahonia nervosa (= var. nervosa), Symphoricarpos mollis, Gaultheria shallon, Rosa gymnocarpa, and Rhododendron macrophyllum are common shrubs. Herbaceous cover ranges 4-77% with an average of 29%. Common herbs include Achlys triphylla, Linnaea borealis ssp. longiflora, Goodyera oblongifolia, Anemone deltoidea, and Synthyris reniformis. Grass cover is very low (1%).
Dynamics: Most examples of this giant, low- to mid-elevation mixed-conifer forest association usually represent second- or third-growth logged forest stands. Old remnants are extremely rare.
Environmental Description: These forests occur mostly on the west side of the southern Oregon Cascades, but may also occur in California. Sites occur between 760-1520 m (2500-5000 feet) elevation on moderate slopes on all aspects.
Geographic Range: Widespread conifer forest in the Klamath Mountains and southern Cascade Range.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.685014
Confidence Level: Low - Poorly Documented
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 | CEGL000013 Douglas-fir - Sierra White Fir / Salal Forest | CEGL000013 | 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: = Pseudotsuga menziesii-Abies concolor/Gaultheria shallon (Meidinger et al. 2005) [PNWCOAST_136]
- 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 L. A. McCrimmon. 1990. Preliminary plant associations of the southern Oregon Cascade Mountain Province. USDA Forest Service, Pacific Northwest Region, Siskiyou National Forest, Grants Pass, OR. 330 pp.
- 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.
- Meidinger, D., C. Chappell, C. Cadrin, G. Kittel, C. McCain, K. Boggs, J. Kagan, G. Cushon, A. Banner, and T. DeMeo. 2005. International Vegetation Classification of the Pacific Northwest: International correlation of temperate coastal forest plant associations of Oregon, Washington, British Columbia and Alaska. Contributors: B.C. Ministry of Forests, USDA Forest Service, B.C. Conservation Data Centre, Alaska Natural Heritage Program, Washington Natural Heritage Program, and Oregon Natural Heritage Information Center.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.