Print Report
CEGL000815 Pinus flexilis Scree Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Limber Pine Scree Woodland
Colloquial Name: Limber Pine Scree Slope
Hierarchy Level: Association
Type Concept: This association occurs in Montana and Alberta, Canada, and is located on high-elevation subalpine sites where materials accumulate in areas below slopes susceptible to bedrock slope movement. It is found on steep, south- to southwest-facing slopes (usually >30°). Substrate is characterized by steep, unstable slopes and lack of soil development. Pinus flexilis is the main tree species, with 5 to 10% cover. Vegetation is generally sparse (90% unvegetated) with most forb species present in or below areas stabilized by mats of Juniperus spp. or Arctostaphylos uva-ursi. Hedysarum sulphurescens and Anemone multifida are the most common forbs; with a number of other species present in trace amounts. This community persists in areas of natural disturbance such as failure of bedrock slopes. More stable areas contain more vegetation growth. It may occur as islands within non-forested scree situations.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The vegetation is generally sparse with tree cover approximately 10%; in some areas it may be only 5%. Pinus flexilis is generally the only tree species in these stands, with trees up to 40 cm in diameter. Most forb species present are in or below areas stabilized by mats of Juniperus horizontalis, Juniperus communis, and Arctostaphylos uva-ursi. Hedysarum sulphurescens and Anemone multifida are the most common forbs in one Alberta stand, although there were a number of other species present in trace amounts.
Dynamics: This community is disturbance-dependent and maintained by inputs of colluvial material. It persists in areas of natural disturbance such as failure of bedrock slopes. More stable areas contain more vegetative growth. It may occur as islands within non-forested scree situations (Pfister et al. 1977).
Environmental Description: This association is located on high-elevation, subalpine colluvial slopes that are subject to active accumulation of materials. It is found on steep, south- to southwest-facing slopes (usually >30°). Substrate is characterized by steep, unstable slopes and lack of soil development. This community persists in areas of natural disturbance such as failure of bedrock slopes. More stable areas contain more vegetation growth. It may occur as islands within non-forested scree situations (Pfister et al. 1977).
Geographic Range: This association occurs in Montana and Alberta, Canada.
Nations: CA,US
States/Provinces: AB, MT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688483
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G3Q
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.Nb Rocky Mountain Forest & Woodland Division | D194 | 1.B.2.Nb |
| Macrogroup | 1.B.2.Nb.5 Subalpine Fir - Engelmann Spruce - Whitebark Pine Rocky Mountain Forest Macrogroup | M020 | 1.B.2.Nb.5 |
| Group | 1.B.2.Nb.5.e Limber Pine - Bristlecone Pine Rocky Mountain Subalpine-Montane Woodland Group | G221 | 1.B.2.Nb.5.e |
| Alliance | A0540 Limber Pine Rocky Mountain Woodland Alliance | A0540 | 1.B.2.Nb.5.e |
| Association | CEGL000815 Limber Pine Scree Woodland | CEGL000815 | 1.B.2.Nb.5.e |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pinus flexilis scree woodland (Allen 2005)
< Forested Scree Communities (Pfister et al. 1977)
< Forested Scree Communities (Pfister et al. 1977)
- ANHIC [Alberta Natural Heritage Information Centre]. 2018. Community database files. Alberta Natural Heritage Information Centre, Parks and Protected Areas Division, Alberta Community Development, Edmonton.
- Allen, L. 2005. Alberta Natural Heritage Information Centre Preliminary Plant Community Tracking List. Alberta Community Development, Edmonton, Alberta. 94 pp.
- Allen, L. 2012-2013. Alberta Conservation Information Management System Ecological Community Tracking List. Alberta Tourism, Parks and Recreation, Edmonton, AB. [http://tpr.alberta.ca/parks/heritageinfocentre/default.aspx]
- 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.
- MTNHP [Montana Natural Heritage Program]. 2002b. List of ecological communities for Montana. Montana Natural Heritage Program, Montana State Library, Helena, MT.
- Pfister, R. D., B. L. Kovalchik, S. F. Arno, and R. C. Presby. 1977. Forest habitat types of Montana. General Technical Report INT-34. USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, UT. 174 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.