Print Report
A3937 Alnus viridis ssp. sinuata Shrubland Alliance
Type Concept Sentence: This alliance consists of closed to open tall alder thickets of Alnus viridis on flat to steep slopes of southwestern Alaska on the Alaska peninsula, Kodiak Island and the Aleutian Islands.
Common (Translated Scientific) Name: Sitka Alder Shrubland Alliance
Colloquial Name: Southern Alaskan Sitka Alder Shrubland
Hierarchy Level: Alliance
Type Concept: These shrublands and thickets are dominated by usually nearly pure stands of Alnus viridis ssp. sinuata or Alnus viridis ssp. fruticosa on steep exposed slopes. Some slopes are dynamic with landslides keeping tree growth at bay. These are shrublands of southwestern Alaska, including the Alaska peninsula, Kodiak Island and the Aleutian Islands.
Diagnostic Characteristics: Shrublands and thickets dominated by Alnus viridis ssp. sinuata or Alnus viridis ssp. fruticosa.
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: These are pure alder stands on steep slopes.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: Tall to medium-tall deciduous shrubs.
Floristics: These shrublands and thickets are dominated by Alnus viridis ssp. sinuata or Alnus viridis ssp. fruticosa. Salix spp. may also be present but these never as abundant as the alder cover.
Dynamics: Steep slopes are subject to frequent avalanches, keeping shrubs and any trees present below their potential in height.
Environmental Description: This alliance is found on flat to steep slopes.
Geographic Range: This alliance is found on the Alaska peninsula, Kodiak Island and the Aleutian Islands.
Nations: US
States/Provinces: AK
Categories
Never was there
Potential, but false report exists
Potential
Reported but false
Reported but doubtful
Reported but unconfirmed
Confident or Certain
Never was there
Potential, but false report exists
Potential
Reported but false
Reported but doubtful
Reported but unconfirmed
Confident or Certain
500 mi
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899988
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 | A3937 Sitka Alder Shrubland Alliance | A3937 | 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.