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CEGL000577 Populus tremuloides / Carex pellita Riparian Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Quaking Aspen / Woolly Sedge Riparian Forest

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This association is a wide-ranging, linear or small-patch community type, found in eastern Washington and Oregon in the Columbia Basin, Okanogan Highlands, and the Blue Mountains. It is associated with ephemeral depressions, wetland sites, organic soils, shallow water tables, and with low-gradient headwater streams. Elevations range from 549 to 1647 m (1800-5400 feet). This is an open forest dominated by Populus tremuloides occasionally with Pinus contorta var. latifolia or Betula papyrifera in the northern portions of its range or with Pinus ponderosa in Oregon or Betula occidentalis in the Columbia Basin. The understory is graminoid-dominated. Carex pellita is indicative of this community type with high cover (well over 25% cover) in higher condition sites. Carex microptera, Carex nebrascensis, Calamagrostis canadensis, Elymus glaucus, and Poa pratensis are low cover sedge-grass associates. Forbs are frequent but rarely abundant. Shrub cover is typical low with Salix boothii, Cornus sericea, and Rosa gymnocarpa frequent in northern sites and Cornus sericea and Symphoricarpos albus on warmer sites.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: This association is defined as a PNV vegetation type.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: This is an open forest dominated by Populus tremuloides occasionally with Pinus contorta var. latifolia or Betula papyrifera in the northern portions of its range or with Pinus ponderosa in Oregon or Betula occidentalis in the Columbia Basin. The understory is graminoid-dominated. Carex pellita (= Carex lanuginosa) is indicative of this community type with high cover (well over 25% cover) in higher condition sites. Carex microptera, Carex nebrascensis, Calamagrostis canadensis, Elymus glaucus, and Poa pratensis are low cover sedge-grass associates. Forbs are frequent but rarely abundant. Shrub cover is typical low with Salix boothii, Cornus sericea, and Rosa gymnocarpa frequent in northern sites and Cornus sericea and Symphoricarpos albus on warmer sites.

Dynamics:  No Data Available

Environmental Description:  It is associated with ephemeral depressions, wetland sites, organic soils, shallow water tables, and with low-gradient headwater streams. Elevations range from 549 to 1647 m (1800-5400 feet).

Geographic Range: This association is found in eastern Washington and Oregon in the Columbia Basin, Okanogan Highlands, and the Blue Mountains. It may also occur in higher elevation portions of the northern Great Basin.

Nations: US

States/Provinces:  CA?, NV?, OR, WA




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: G2

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Populus tremuloides / Carex lanuginosa (Crowe and Clausnitzer 1997) [(p.78)]
= Populus tremuloides / Carex lanuginosa Association (Kovalchik 1993) [(p.80)]
= Populus tremuloides / Carex pellita Association (Crowe et al. 2004)

Concept Author(s): R.C. Crawford

Author of Description: R.C. Crawford

Acknowledgements: No Data Available

Version Date: 11-26-97

  • Bailey, R. G., P. E. Avers, T. King, and W. H. McNab, editors. 1994. Ecoregions and subregions of the United States (map). U.S. Geological Survey, Washington, DC. Scale 1:7,500,000 colored. Accompanied by a supplementary table of map unit descriptions compiled and edited by W. H. McNab and R. G. Bailey. Prepared for the USDA Forest Service.
  • 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.
  • 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.
  • 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. 1993. Riparian plant associations on the national forests of eastern Washington - Draft version 1. USDA Forest Service, Colville National Forest, Colville, WA. 203 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]
  • Kovalchik, Bud L. Personal communication. U.S. Forest Service riparian ecologist, retired. Colville, WA.
  • Mackenzie, Will. Personal communication. British Columbia Ministry of Forestry Wetlands & Riparian Specialist, Smithers, BC, Canada.
  • Padgett, W. G. 1982. Ecology of riparian plant communities in southern Malheur National Forest. Unpublished thesis, Oregon State University, Corvallis. 143 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.