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Malus fusca Shrub Swamp
Translated Name: Oregon Crabapple Shrub Swamp
Unique Identifier: CEGL003385
Classification Approach: International Vegetation Classification (IVC)
Summary: This association is currently only described from Oregon but is also reported to occur in Washington and possibly British Columbia. Additional global information will be added as it becomes available. Habitat is depressions in both deciduous and coniferous forest. Several examples of this association have been observed in the field but only one plot has been sampled. All trees are peripheral to the wetlands. The most typical expression known to the author is a dense, monotypic stand of Malus fusca with a monotypic understory of Carex obnupta. Depending on hydroperiod, the understory ranges from nearly 100% cover of Carex obnupta to very low cover of any other vegetation because of prolonged seasonal ponding. The plot reported here also contains Salix geyeriana and Spiraea douglasii. The association may have been more widespread historically, as large expanses of swamp vegetation once occurred in the northern Willamette and Tualatin valleys. These wetlands have not been sampled adequately.



Classification

Classification Confidence: Low

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 Oregon Crabapple Shrub Swamp

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These data are subject to substantial ongoing revision and may be out of date for some states.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 Malus fusca Equivalent Certain Kagan et al. 2004


Other Related Concepts
Related Concept Name: Malus fusca - Maianthemum dilatatum Site Association
Relationship: = - Equivalent
Reference: MacKenzie, W. H., and J. R. Moran. 2004. Wetlands of British Columbia: A guide to identification. Land Management Handbook No. 52. Research Branch, British Columbia Ministry of Forests and Lands, Victoria, BC. 287 pp.
Related Concept Name: Malus fusca / Carex obnupta 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: Pyrus fusca community type
Relationship: = - Equivalent
Reference: 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.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES204.063 North Pacific Bog and Fen
CES204.865 North Pacific Shrub Swamp


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

Distribution
Color legend for Distribution Map
United States Distribution: OR, WA
Canadian Province Distribution: BCpotentially occurs
Global Distribution: Canadapotentially occurs, United States
Global Range: This association is found in western Oregon, western Washington, and possibly southwestern 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


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

  • 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.

  • 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.

  • MacKenzie, W. H., and J. R. Moran. 2004. Wetlands of British Columbia: A guide to identification. Land Management Handbook No. 52. Research Branch, British Columbia Ministry of Forests and Lands, Victoria, BC. 287 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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