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Populus tremuloides / Symphoricarpos albus Forest
Translated Name: Quaking Aspen / Common Snowberry Forest
Unique Identifier: CEGL000609
Classification Approach: International Vegetation Classification (IVC)
Summary: This is a minor type described from only a few plots in Montana, Wyoming, and north-central Washington. It occurs adjacent to very wet sites, irrigation ditches, marshes or wet meadows. It occurs from 1155 to 1973 m (3790-6473 feet) in elevation. It occurs on basin floors to slopes up to 48%. Soils are fine-textured. This is a wet, low-lying aspen forest, distinguished by an abundant layer of Symphoricarpos albus. The overstory canopy is dominated by Populus tremuloides. Conifers when present are low in abundance and include Pinus contorta or Larix occidentalis, Pinus ponderosa, or Pseudotsuga menziesii. Tall shrubs may be present but do not form a distinct layer, with Amelanchier alnifolia and sapling Populus tremuloides. The short-shrub layer is distinct, with Symphoricarpos albus the dominant. Other low-stature shrubs include Rosa woodsii and Mahonia repens. The herbaceous layer is diverse with many grasses and forbs. Graminoids include Achnatherum nelsonii, Elymus trachycaulus, Phleum pratense, and Poa pratensis. Forbs include Actaea rubra, Helianthella uniflora, Lupinus sericeus, and Symphyotrichum spathulatum.



Classification

Classification Confidence: Moderate

Vegetation Hierarchy
Class 1 - Forest & Woodland
Subclass 1.B - Temperate & Boreal Forest & Woodland
Formation 1.B.2 - Cool Temperate Forest & Woodland
Division 1.B.2.Nb - Rocky Mountain Forest & Woodland
Macrogroup Rocky Mountain Subalpine-High Montane Forest
Group Rocky Mountain Subalpine-Montane Aspen Forest & Woodland
Alliance Rocky Mountain Aspen Forest & Woodland

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

Similar Associations
Unique Identifier Name
CEGL000607 Populus tremuloides / Spiraea betulifolia Forest
CEGL000946 Populus tremuloides / Symphoricarpos albus / Elymus glaucus Woodland
CEGL005849 Populus tremuloides / Urtica dioica Forest



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These data are subject to substantial ongoing revision and may be out of date for some states.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 Populus tremuloides / Symphoricarpos albus Equivalent Certain Kagan et al. 2004
Washington Populus tremuloides / Symphoricarpos albus Riparian Forest Equivalent Certain WNHP unpubl. data 2018


Other Related Concepts
Related Concept Name: Populus tremuloides / Symphoricarpos albus Temporarily Flooded Forest (POPTRE/SYMALB)
Relationship: = - Equivalent
Reference: Crawford, R. C. 2003. Riparian vegetation classification of the Columbia Basin, Washington. Natural Heritage Report 2003-03. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 98 pp. plus appendices.
Related Concept Name: Populus tremuloides / Symphoricarpos albus
Relationship: ? - Undetermined
Reference: Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
Related Concept Name: Populus tremuloides / Symphoricarpos albus Association
Relationship: = - Equivalent
Reference: Crowe, E. A., B. L. Kovalchik, and M. J. Kerr. 2004. Riparian and wetland vegetation of central and eastern Oregon. Oregon Natural Heritage Information Center, Institute for Natural Resources, Oregon State University, Portland. 473 pp. [http://oregonstate.edu/ornhic/ publications.html]
Related Concept Name: Populus tremuloides / Symphoricarpos albus Plant Association
Relationship: = - Equivalent
Reference: Williams, C. K., and T. R. Lillybridge. 1983. Forested plant associations of the Okanogan National Forest. R6-Ecol-132b-1983. USDA Forest Service, Pacific Northwest Region, Portland, OR. 140 pp.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES306.813 Rocky Mountain Aspen Forest and Woodland


NatureServe Conservation Status
Global Status: G3? (01Feb1996)
Rounded Global Status: G3 - Vulnerable

Distribution
Color legend for Distribution Map
United States Distribution: MT, OR, WA, WY
Global Distribution: United States
Global Range: The association is known from western Montana, western Wyoming, and north-central Washington.

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: Eastern Cascades Section
Section Code: M242C Occurrence Status: Confident or certain
Domain Name: Dry Domain
Division Name: Temperate Steppe Regime Mountains
Province Name: Southern Rocky Mountain Steppe - Open Woodland - Coniferous Forest - Alpine Meadow Province
Province Code: M331 Occurrence Status: Confident or certain
Section Name: Overthrust Mountains Section
Section Code: M331D Occurrence Status: Confident or certain
Province Name: Northern Rocky Mountain Forest - Steppe - Coniferous Forest - Alpine Meadow Province
Province Code: M333 Occurrence Status: Confident or certain
Section Name: Okanogan Highlands Section
Section Code: M333A Occurrence Status: Confident or certain
Section Name: Flathead Valley Section
Section Code: M333B Occurrence Status: Possible
Section Name: Northern Rockies Section
Section Code: M333C Occurrence Status: Confident or certain


Vegetation

Vegetation Summary: This is a wet, low-lying aspen forest, distinguished by an abundant layer of Symphoricarpos albus. The overstory canopy is dominated by Populus tremuloides. Conifers when present are low in abundance and include Pinus contorta or Larix occidentalis, Pinus ponderosa, or Pseudotsuga menziesii. Tall shrubs may be present but do not form a distinct layer, with Amelanchier alnifolia and sapling Populus tremuloides. The short-shrub layer is distinct, with Symphoricarpos albus the dominant. Other low-stature shrubs include Rosa woodsii and Mahonia repens. The herbaceous layer is diverse with many grasses and forbs. Graminoids include Achnatherum nelsonii, Elymus trachycaulus, Phleum pratense, and Poa pratensis. Forbs include Actaea rubra, Helianthella uniflora, Lupinus sericeus, and Symphyotrichum spathulatum.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Populus tremuloides G3 Broad-leaved deciduous tree Tree canopy    
 
 
Berberis repens G3 Dwarf-shrub Short shrub/sapling    
 
 
Rosa woodsii G3 Dwarf-shrub Short shrub/sapling    
 
 
Symphoricarpos albus G3 Broad-leaved deciduous shrub Short shrub/sapling    
 
 
Phleum pratense G3 Graminoid Herb (field)      
 
 


Environmental Setting

Wetland Indicator: N
Environmental Summary: This is a minor type described from only a few plots in Montana, Wyoming, and north-central Washington. It occurs adjacent to very wet sites, irrigation ditches, marshes or wet meadows. It occurs from 1155 to 1973 m (3790-6473 feet) in elevation. It occurs on basin floors to slopes up to 48%. Soils are fine-textured.


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): Western Ecology Group
Element Description Edition Date: 12Jul2004
Element Description Author(s): G. Kittel

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.

  • Cogan, D., K. Varga, and G. Kittel. 2005. USGS-NPS Vegetation Mapping Program: Grand Teton National Park and John D. Rockefeller, Jr. Memorial Parkway. Final Project Report 2002-2005 Vegetation Mapping Project. Technical Memorandum 8260-06-02. USDI Bureau of Reclamation, Denver, CO. 87 pp. plus Appendixes A-F.

  • Cooper, S., and R. Pfister. 1981. Forest habitat types of the Blackfeet Indian Reservation. Review Draft, 5/21/81, for Bureau of Indian Affairs, Wind River Agency, Fort Washakie, WY.

  • Crawford, R. C. 2001. Initial riparian and wetland classification and characterization of the Columbia Basin in Washington. Prepared for Environmental Protection Agency and Bureau of Land Management, Spokane District. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 83 pp.

  • Crawford, R. C. 2003. Riparian vegetation classification of the Columbia Basin, Washington. Natural Heritage Report 2003-03. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia. 98 pp. plus appendices.

  • Crowe, E. A., B. L. Kovalchik, and M. J. Kerr. 2004. Riparian and wetland vegetation of central and eastern Oregon. Oregon Natural Heritage Information Center, Institute for Natural Resources, Oregon State University, Portland. 473 pp. [http://oregonstate.edu/ornhic/ publications.html]

  • Crowe, E. A., and R. R. Clausnitzer. 1997. Mid-montane wetland plant associations of the Malheur, Umatilla, and Wallowa-Whitman national forests. Technical Paper R6-NR-ECOL-TP-22-97. USDA Forest Service, Pacific Northwest Region, Portland, OR.

  • Erixson, J., D. Cogan, and J. Von Loh. 2011b. Vegetation inventory project report: Lake Roosevelt National Recreation Area. Natural Resource Report NPS/UCBN/NRR--2011/434 National Park Service, Fort Collins, CO.

  • Hop, K., M. Reid, J. Dieck, S. Lubinski, and S. Cooper. 2007. U.S. Geological Survey-National Park Service Vegetation Mapping Program: Waterton-Glacier International Peace Park. U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, WI. 131 pp. plus Appendices A-L.

  • 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.

  • Kovalchik, B. L. 1987. Riparian zone associations - Deschutes, Ochoco, Fremont, and Winema national forests. Technical Paper 279-87. USDA Forest Service, Pacific Northwest Region, Portland, OR. 171 pp.

  • Kovalchik, B. L. 2001. Classification and management of aquatic, riparian and wetland sites on the national forests of eastern Washington. Part 1: The series descriptions. 429 pp. plus appendix. [http://www.reo.gov/col/wetland_classification/wetland_classification.pdf]

  • MTNHP [Montana Natural Heritage Program]. 2002b. List of ecological communities for Montana. Montana Natural Heritage Program, Montana State Library, Helena, MT.

  • Reid, M. S., S. V. Cooper, and G. Kittel. 2004. Vegetation classification of Waterton-Glacier International Peace Park. Final report for USGS-NPS Vegetation Mapping Program, International Peace Park Mapping Project. NatureServe, Arlington VA.

  • Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.

  • Titus, J. H., M. Kerr, E. Crowe, and B. Kovalchik. 1998. Riparian zones of eastern Oregon. Oregon Natural Heritage Program, Portland.

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

  • Weixelman, D. A., D. C. Zamudio, and K. A. Zamudio. 1996. Central Nevada riparian field guide. USDA Forest Service Technical Report R4-ECOL-96-01. USDA Forest Service, Intermountain Region.

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

  • Williams, C. K., and T. R. Lillybridge. 1983. Forested plant associations of the Okanogan National Forest. R6-Ecol-132b-1983. USDA Forest Service, Pacific Northwest Region, Portland, OR. 140 pp.


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