Print Report
CEGL000215 Abies amabilis - Abies lowiana / Mahonia nervosa Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Pacific Silver Fir - Sierra White Fir / Cascade Barberry Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This giant conifer forest community occurs in the Cascades of southern Oregon where it thrives on flat or convex sites at elevations of 1340-1525 m (4400-5000 feet). Parent material of basalt and andesite are most common. Snowfall accumulations average 1.2-1.5 m (4-5 feet) annually. Pseudotsuga menziesii and Abies lowiana dominate the overstory while Abies amabilis and Abies lowiana dominate the understory. A shrub layer, averaging 40%, is characterized by Mahonia nervosa and Vaccinium membranaceum. Herbaceous cover varies widely and averages 45% with common associates Maianthemum stellatum, Achlys triphylla, and Pteridium aquilinum. Grass cover is depauperate.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Atzet and McCrimmon (1990) refer to this community as Abies concolor - Abies amabilis / Mahonia nervosa var. nervosa.
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 overstory while Abies amabilis and Abies lowiana dominate the understory. A shrub layer, averaging 40%, is characterized by Mahonia nervosa (= var. nervosa) and Vaccinium membranaceum. Herbaceous cover varies widely and averages 45% with common associates Maianthemum stellatum (= Smilacina stellata), Achlys triphylla, and Pteridium aquilinum. Grass cover is depauperate.
Dynamics: No Data Available
Environmental Description: This giant conifer forest community occurs in the Cascades of southern Oregon where it thrives on flat or convex sites at elevations of 1340-1525 m (4400-5000 feet). Parent material of basalt and andesite are most common. Snowfall accumulations average 1.2-1.5 m (4-5 feet) annually.
Geographic Range: This forest association occurs in the Cascades of southern Oregon.
Nations: US
States/Provinces: OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688736
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G2G3
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.3 Western Hemlock - Sitka Spruce - Redwood Rainforest Macrogroup | M024 | 1.B.2.Nd.3 |
| Group | 1.B.2.Nd.3.d Pacific Silver Fir - Western Hemlock Rainforest Group | G241 | 1.B.2.Nd.3.d |
| Alliance | A3387 Pacific Silver Fir - Western Hemlock / Thinleaf Huckleberry Cold Forest Alliance | A3387 | 1.B.2.Nd.3.d |
| Association | CEGL000215 Pacific Silver Fir - Sierra White Fir / Cascade Barberry Forest | CEGL000215 | 1.B.2.Nd.3.d |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Abies concolor - Abies amabilis / Mahonia nervosa var. nervosa (Atzet and McCrimmon 1990)
- 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.
- Hemstrom, M. A., S. E. Logan, and W. Pavlat. 1987. Plant association and management guide, Willamette National Forest. Report R6-Ecol 257-B-86. USDA Forest Service, Pacific Northwest Region, Portland, OR. 312 pp.
- 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.