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Abies grandis / Trautvetteria caroliniensis Forest
Translated Name: Grand Fir / Carolina Tassel-rue Forest
Unique Identifier: CEGL000285
Classification Approach: International Vegetation Classification (IVC)
Summary: This association is found at moderate elevations in the northeastern section of the Blue Mountains ecoregion of Oregon and in Washington. Geomorphic surfaces are floodplains in moderate- to high-gradient, narrow to wide, V- and trough-shaped valleys with gentle to steep sideslopes. Soils are mineral, although an organic or organic-rich surface horizon is often present. Coarse fragments are shallow in the horizon, and the water table is high during the growing season. Adjacent Rosgen stream reach types were A3, A4, B3 and B4. Abies grandis is the tree overstory dominant, although Picea engelmannii can sometimes be codominant. Shrub cover is generally sparse, but occasionally a few species may be abundant. Trautvetteria caroliniensis forms a carpet in the herbaceous understory. Other herbaceous species are scattered, generally at low cover. The most commonly occurring herbs are Maianthemum stellatum, Osmorhiza berteroi, Viola glabella, Fragaria vesca, Thalictrum alpinum, Galium triflorum, and Arnica cordifolia. Height of shrub layer averages 1.8 m, ranging from 0.9-3.7 m. Height of the herbaceous layer averages 51 cm, ranging from 31 to 91 cm. Herbaceous biomass averages 223 lbs/acre, ranging from 168-321 lbs/acre. Moderate fires will kill Abies grandis and Picea engelmannii on sites. The other common shrubs and herbs will survive fire and re-sprout or re-seed. Shrub cover may become more unless competition from Trautvetteria caroliniensis plants prevents shrub seedlings from becoming established.



Classification

Classification Confidence: Low - Poorly Documented
Classification Comments: This association is defined as a PNV vegetation type. If it were renamed as a dominance type, the species would include Abies grandis and/or Picea engelmannii.

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 Central Rocky Mountain Mesic Lower Montane Forest
Group Central Rocky Mountain Mesic Grand Fir - Douglas-fir Forest
Alliance Central Rocky Mountain Grand Fir - Douglas-fir Forest & Woodland

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 Abies grandis / Trautvettaria caroliniensis Equivalent Certain Kagan et al. 2004


Other Related Concepts
Related Concept Name: Abies grandis / Trautvetteria caroliniensis 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: Abies grandis / Trautvetteria caroliniensis Forest
Relationship: = - Equivalent
Reference: Johnson, C. G., and R. R. Clausnitzer. 1992. Plant associations of the Blue and Ochoco mountains. R6-ERW-TP-036-92. USDA Forest Service, Pacific Northwest Region, Wallowa-Whitman National Forest. 163 pp. plus appendices.

Ecological Systems Placement

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

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

U.S. Forest Service Ecoregions
Domain Name: Dry Domain
Division Name: Temperate Steppe Regime Mountains
Province Name: Middle Rocky Mountain Steppe - Coniferous Forest - Alpine Meadow Province
Province Code: M332 Occurrence Status: Confident or certain
Section Name: Blue Mountains Section
Section Code: M332G Occurrence Status: Confident or certain


Vegetation


Environmental Setting

Wetland Indicator: N


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): Crowe et al. (2004)
Element Description Edition Date: 05Jul2018
Element Description Author(s): Crowe et al. (2004)

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.

  • 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]

  • Johnson, C. G., and R. R. Clausnitzer. 1992. Plant associations of the Blue and Ochoco mountains. R6-ERW-TP-036-92. USDA Forest Service, Pacific Northwest Region, Wallowa-Whitman National Forest. 163 pp. plus appendices.

  • 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.

  • Williams, C. K., and B. G. Smith. 1990. Forested plant associations of the Wenatchee National Forest. Unpublished draft prepared by the USDA Forest Service, Pacific Northwest Region, Portland, OR. 217 pp.


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