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Alnus rubra / Rubus spectabilis / Carex obnupta - Lysichiton americanus Riparian Forest
Translated Name: Red Alder / Salmonberry / Slough Sedge - Yellow Skunk-cabbage Riparian Forest
Unique Identifier: CEGL003389
Classification Approach: International Vegetation Classification (IVC)
Summary: Habitat for this association is forested wetland (swamp). Some sites are silted-in beaver ponds, and others are in peatlands where the association occurs in nutrient-rich laggs adjacent to uplands. Stands along streams may be flooded for brief periods after winter storms. Stands are dominated by Alnus rubra between 20-50 years old and have relatively few species in the shrub and herb layers. Thuja plicata, Picea sitchensis, and Tsuga heterophylla are sparsely represented in both mature and reproducing layers, where they are peripheral or limited to elevated microsites. The scanty shrub layer may include Rubus ursinus, Salix hookeriana, Spiraea douglasii, Lonicera involucrata, or Rubus spectabilis in wet areas and may have Gaultheria shallon and Acer circinatum on stumps and logs. The herb layer is dominated by Carex obnupta and Lysichiton americanus. Athyrium filix-femina has a constancy of 23%, but cover never exceeds 10%. Polystichum munitum may be abundant on logs and stumps. Expanses of treacherously deep muck frequently occur between clumps of Carex and Lysichiton. Sphagnum does not occur in this association but Eurhynchium praelongum is common.



Classification

Classification Confidence: Low

Vegetation Hierarchy
Class 1 - Forest & Woodland
Subclass 1.B - Temperate & Boreal Forest & Woodland
Formation 1.B.3 - Temperate Flooded & Swamp Forest
Division 1.B.3.Ng - Vancouverian Flooded & Swamp Forest
Macrogroup Vancouverian Flooded & Swamp Forest
Group North-Central Pacific Lowland Riparian Forest
Alliance Bigleaf Maple - Red Alder Riparian Forest

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



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These data are subject to substantial ongoing revision and may be out of date for some states.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 rubra / Rubus spectabilis / Carex obnupta - Lysichiton americanus Equivalent Certain Kagan et al. 2004
Washington Alnus rubra / Rubus spectabilis / Carex obnupta - Lysichiton americanus Swamp Forest Equivalent Certain WNHP unpubl. data 2018


Other Related Concepts
Related Concept Name: Alnus rubra / Carex obnupta - Lysichiton americanus Association
Relationship: = - Equivalent
Reference: Christy, J. A. 2004. Native freshwater wetland plant associations of northwestern Oregon. Oregon Natural Heritage Information Center, Oregon State University, Portland, OR.
Related Concept Name: Alnus rubra/Rubus spectabilis/Carex obnupta-Lysichiton americanus Woodland
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: Red Alder / Salmonberry / Slough Sedge - Skunk Cabbage Saturated Forest (Alnus rubra / Rubus spectabilis / Carex obnupta - Lysichiton americanum)
Relationship: = - Equivalent
Reference: Christy, J. A., J. S. Kagan, and A. M. Wiedemann. 1998. Plant associations of the Oregon Dunes National Recreation Area - Siuslaw National Forest, Oregon. Technical Paper R6-NR-ECOL-TP-09-98. USDA Forest Service, Pacific Northwest Region, Portland, OR. 196 pp.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES204.090 North Pacific Hardwood-Conifer Swamp
CES204.869 North Pacific Lowland Riparian Forest and Shrubland
CES204.875 North Pacific Intertidal Freshwater Wetland


NatureServe Conservation Status
Global Status: G3G4 (01Oct2002)
Rounded Global Status: G3 - Vulnerable

Distribution
Color legend for Distribution Map
United States Distribution: CApotentially occurs, OR, WA
Canadian Province Distribution: BCpotentially occurs
Global Distribution: Canadapotentially occurs, United States
Global Range: This association is common from northern California to British Columbia (Christy 2004).

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Marine Division
Province Name: Pacific Lowland Mixed Forest Province
Province Code: 242 Occurrence Status: Confident or certain
Section Name: Willamette Valley and Puget Trough Section
Section Code: 242A 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
%
Alnus rubra G3 Broad-leaved deciduous tree Tree canopy  
 
 
Rubus spectabilis G3 Broad-leaved deciduous shrub Short shrub/sapling    
 
 
Lysichiton americanus G3 Flowering forb Herb (field)  
 
 
Carex obnupta G3 Graminoid Herb (field)  
 
 


Environmental Setting

Wetland Indicator: Y


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): J.A. Christy (2004)
Element Description Edition Date: 10Jun2006
Element Description Author(s): J.A. Christy (2004)

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


References
  • Christy, J. A. 2001a. Low-elevation Sphagnum wetlands in western Oregon. Report to Environmental Protection Agency, Region 10. Oregon Natural Heritage Program, Portland. 90 pp.

  • Christy, J. A. 2004. Native freshwater wetland plant associations of northwestern Oregon. Oregon Natural Heritage Information Center, Oregon State University, Portland, OR.

  • Christy, J. A., J. S. Kagan, and A. M. Wiedemann. 1998. Plant associations of the Oregon Dunes National Recreation Area - Siuslaw National Forest, Oregon. Technical Paper R6-NR-ECOL-TP-09-98. USDA Forest Service, Pacific Northwest Region, Portland, OR. 196 pp.

  • 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.

  • Henderson, J. A. 1970. Biomass and composition of the understory vegetation in some Alnus rubra stands in western Oregon. Unpublished thesis, Oregon State University, Corvallis, OR. 64 pp.

  • Henderson, J. A. 1979. Plant succession on the Alnus rubra / Rubus spectabilis habitat type in western Oregon. Northwest Science 53:200-211.

  • Kagan, J. S., E. M. Nielsen, M. D. Noone, J. C. van Warmerdam, L. K. Wise, G. Kittel, and C. Copass. 2012. Lewis and Clark National Historic Park vegetation classification and mapping project report. Natural Resource Report NPS/NCCN/NRR--2012/597. National Park Service, Fort Collins, CO.

  • 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.

  • Klinka, K., H. Qian, J. Pojar, and D. V. Meidinger. 1996. Classification of natural forest communities of coastal British Columbia. Vegetatio 125:149-168.

  • Kunze, L. M. 1994. Preliminary classification of native, low elevation, freshwater wetland vegetation in western Washington. Washington State Department of Natural Resources, Natural Heritage Program. 120 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.


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