Print Report
A3940 Salix alaxensis - Salix barclayi - Salix bebbiana Upland Willow Thicket Shrubland Alliance
Type Concept Sentence: This alliance consists of stands dominated by Salix alaxensis, Salix barclayi, Salix bebbiana, and other shrubs on upland slopes from low to mid elevations on the Aleutian Islands and maritime regions of mainland Alaska and British Columba.
Common (Translated Scientific) Name: Feltleaf Willow - Barclay''s Willow - Bebb''s Willow Upland Willow Thicket Shrubland Alliance
Colloquial Name: Southern Alaskan Upland Tall Willow Thicket Shrubland
Hierarchy Level: Alliance
Type Concept: Stands are dominated by Salix alaxensis, Salix barclayi, Salix bebbiana, and others. If alder is present, it is less than 25% of the willow cover. It occurs on flat to steep slopes (0-50°) at low to mid elevations (1-1000 m) in valleys, hills and mountains of the Aleutian Islands; in southeastern Alaska, it occurs on mountain sideslopes from sea level to treeline where slopes are steep enough to produce frequent snowslides preventing forest development. It also is found just above treeline and below the alpine throughout the maritime region of Alaska and British Columbia. Soils are typically mesic, well-drained, shallow, and stony, can be ash-covered, and underlain by colluvium, glacial drift, till or residuum. Precipitation is abundant, and these shrublands are mesic to wet. Total low- and tall-shrub cover is generally greater than 25%.
Diagnostic Characteristics: Stands are dominated by Salix alaxensis, Salix barclayi, Salix bebbiana, and others. If alder is present, it is less than 25% of the willow cover.
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: Tall multi-stem deciduous shrubs.
Floristics: Stands are dominated by Salix alaxensis, Salix barclayi, Salix bebbiana, and others. If alder is present, it is less than 25% of the willow cover.
Dynamics: Some stands occur on slopes that are steep enough to produce frequent snowslides preventing forest development.
Environmental Description: It occurs on flat to steep slopes (0-50°) at low to mid elevations (1-1000 m) in valleys, hills and mountains of the Aleutians; in southeastern Alaska, it occurs on mountain sideslopes from sea level to treeline where slopes are steep enough to produce frequent snowslides preventing forest development. It also is found just above treeline and below the alpine throughout the maritime region of Alaska and British Columbia. Soils are typically mesic, well-drained, shallow, and stony, can be ash-covered, and underlain by colluvium, glacial drift, till or residuum. Precipitation is abundant, and these shrublands are mesic to wet.
Geographic Range: This alliance is found in southern Alaska, the Alaska peninsula, Kodiak Island and the Aleutian Islands. It also is found just above treeline and below the alpine throughout the maritime region of Alaska and British Columbia.
Nations: CA,US
States/Provinces: AK, BC
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899991
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.B Temperate & Boreal Grassland & Shrubland Subclass | S18 | 2.B |
| Formation | 2.B.2 Temperate Grassland & Shrubland Formation | F012 | 2.B.2 |
| Division | 2.B.2.Nf Western North American Grassland & Shrubland Division | D022 | 2.B.2.Nf |
| Macrogroup | 2.B.2.Nf.5 Northern Vancouverian Lowland-Montane Grassland & Shrubland Macrogroup | M172 | 2.B.2.Nf.5 |
| Group | 2.B.2.Nf.5.a Green Alder - Salmonberry - Feltleaf Willow Vancouverian Shrubland Group | G354 | 2.B.2.Nf.5.a |
| Alliance | A3940 Feltleaf Willow - Barclay''s Willow - Bebb''s Willow Upland Willow Thicket Shrubland Alliance | A3940 | 2.B.2.Nf.5.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2019b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.