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Alnus viridis ssp. sinuata / Acer circinatum Shrub Swamp
Translated Name: Sitka Alder / Vine Maple Shrub Swamp
Unique Identifier: CEGL001155
Classification Approach: International Vegetation Classification (IVC)
Summary: This association occurs at middle elevations in the Cascade Range and Olympic Mountains. Sites are usually moderate to steep slopes (34-85%) on talus or avalanche chutes. The well-developed, tall-shrub layer is codominated by Alnus viridis ssp. sinuata and Acer circinatum. The understory layer frequently includes Maianthemum stellatum and Cryptogramma acrostichoides. The shrubs Paxistima myrsinites and Rubus parviflorus and the forb Maianthemum racemosum are infrequent but prominent. Moss and lichen ground cover may be prominent.



Classification

Classification Confidence: Low
Classification Comments: This Cascadian association is similar to Alnus viridis ssp. sinuata / Mesic Forbs Wet Shrubland (CEGL002633), except for the codominance of Acer circinatum. The latter association includes Acer circinatum-codominated stands and fails to recognize biogeographic variation.

Vegetation Hierarchy
Class 2 - Shrub & Herb Vegetation
Subclass 2.C - Shrub & Herb Wetland
Formation 2.C.4 - Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland
Division 2.C.4.Nb - Western North American Temperate & Boreal Freshwater Marsh, Wet Meadow & Shrubland
Macrogroup Vancouverian Lowland Marsh, Wet Meadow & Shrubland
Group Vancouverian Wet Shrubland
Alliance Pacific Green Alder - Vine Maple Shrub Swamp

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.

Similar Associations
Unique Identifier Name
CEGL002633 Alnus viridis ssp. sinuata / Mesic Forbs Wet Shrubland



Related Concepts from Other Classifications

Related Subnational Community Units
These data are subject to substantial ongoing revision and may be out of date for some states.
In the U.S., contact the state Heritage Program for the most complete and up-to-date information at: http://www.natureserve.org/natureserve-network.
Information from programs in other jurisdictions will be posted when they are made available.
Subnation Concept Name Relationship to Standard Confidence Reference
Oregon Alnus viridis ssp. sinuata - Acer circinatum Equivalent Certain Kagan et al. 2004


Other Related Concepts
Related Concept Name: Acer circinatum - Alnus incana association
Relationship: = - Equivalent
Reference: Diaz, N. M., and T. K. Mellen. 1996. Riparian ecological types, Gifford Pinchot and Mt. Hood national forests, and Columbia River Gorge National Scenic Area. Technical Report R6-NR-TP-10-96. USDA Forest Service, Pacific Northwest Region, Portland, OR. 203 pp. plus appendices.
Related Concept Name: Alnus viridis ssp. sinuata / Acer circinatum Shrubland
Relationship: = - Equivalent
Reference: Henderson, J. A., and D. Peter. 1982. Preliminary plant associations and habitat types of the Snoqualmie and adjacent Skykomish River drainages, Mt. Baker-Snoqualmie National Forest. Unpublished report prepared for USDA Forest Service, Pacific Northwest Region. 87 pp.
Related Concept Name: Alnus viridis ssp. sinuata-Acer circinatum Shrubland
Relationship: = - Equivalent
Reference: Crawford, R. C., C. B. Chappell, C. C. Thompson, and F. J. Rocchio. 2009. Vegetation classification of Mount Rainier, North Cascades, and Olympic national parks. Plant association descriptions and identification keys: Appendices A-G. Natural Resource Technical Report NPS/NCCN/NRTR--2009/D-586. National Park Service, Fort Collins, CO. 586 pp.
Related Concept Name: II. Shrubland Alnus sinuata, Acer circinatum, Ribes bracteosum
Relationship: = - Equivalent
Reference: del Moral, R. 1973. The vegetation of Findley Lake Basin. The American Midland Naturalist 89(10):26-40.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES204.854 North Pacific Avalanche Chute Shrubland


NatureServe Conservation Status
Global Status: G4G5 (01Feb1996)
Rounded Global Status: G4 - Apparently Secure

Distribution
Color legend for Distribution Map
United States Distribution: OR, WA
Global Distribution: United States

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Marine Regime Mountains
Province Name: Cascade Mixed Forest - Coniferous Forest - Alpine Meadow Province
Province Code: M242 Occurrence Status: Confident or certain
Section Name: Oregon and Washington Coast Ranges Section
Section Code: M242A Occurrence Status: Confident or certain
Section Name: Western Cascades Section
Section Code: M242B Occurrence Status: Confident or certain


Vegetation


Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Acer circinatum G4 Broad-leaved deciduous shrub Tall shrub/sapling  
 
 
Alnus viridis ssp. sinuata G4 Broad-leaved deciduous shrub Tall shrub/sapling  
 
 


Environmental Setting

Wetland Indicator: Y


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): Crawford et al. (2009)
Element Description Edition Date: 07Jan2016
Element Description Author(s): Crawford et al. (2009)

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • 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.

  • Crawford, R. C., C. B. Chappell, C. C. Thompson, and F. J. Rocchio. 2009. Vegetation classification of Mount Rainier, North Cascades, and Olympic national parks. Plant association descriptions and identification keys: Appendices A-G. Natural Resource Technical Report NPS/NCCN/NRTR--2009/D-586. National Park Service, Fort Collins, CO. 586 pp.

  • Daubenmire, R. F., and J. B. Daubenmire. 1968. Forest vegetation of eastern Washington and northern Idaho. Washington State University Agricultural Experiment Station Technical Bulletin No. 60. 104 pp.

  • Diaz, N. M., and T. K. Mellen. 1996. Riparian ecological types, Gifford Pinchot and Mt. Hood national forests, and Columbia River Gorge National Scenic Area. Technical Report R6-NR-TP-10-96. USDA Forest Service, Pacific Northwest Region, Portland, OR. 203 pp. plus appendices.

  • Douglas, G. W. 1971. An ecological survey of potential natural areas in the North Cascades National Park complex. Unpublished report prepared for Intercampus Education and Science Preserves Commission, State of Washington. 137 pp.

  • Franklin, J. F., and C. T. Dyrness. 1973. Natural vegetation of Oregon and Washington. General Technical Report PNW-8. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 417 pp.

  • Henderson, J. A., and D. Peter. 1982. Preliminary plant associations and habitat types of the Snoqualmie and adjacent Skykomish River drainages, Mt. Baker-Snoqualmie National Forest. Unpublished report prepared for USDA Forest Service, Pacific Northwest Region. 87 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.

  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.

  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.

  • del Moral, R. 1973. The vegetation of Findley Lake Basin. The American Midland Naturalist 89(10):26-40.


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