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CEGL001052 Artemisia tridentata ssp. wyomingensis / Achnatherum thurberianum Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Wyoming Big Sagebrush / Thurber''s Needlegrass Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This shrubland association occurs primarily in the Owyhee Uplands ecoregional section in southwestern Idaho, southeastern Oregon, and northern Nevada but also occurs in northeastern California. The association occurs on gentle slopes with convex or straight microtopography in mid- and upper-slope positions at 1210-1700 m (4000-5600 feet) elevation. Soils are typically silt loams. Artemisia tridentata ssp. wyomingensis forms an open, medium-tall shrub canopy. Achnatherum thurberianum is usually abundant; Poa secunda is common to well-represented. Commonly associated perennial forbs include Phlox longifolia, Antennaria dimorpha, Crepis occidentalis, Erigeron pumilus, Allium acuminatum, and Astragalus purshii.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The association is described by Hironaka et al. (1983) from stands located in Idaho. The occurrence and distribution of the association is supported by numerous observations within the Owyhee Uplands.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Artemisia tridentata ssp. wyomingensis forms an open, medium-tall shrub canopy. Achnatherum thurberianum (= Stipa thurberiana) is usually abundant; Poa secunda is common to well-represented. Commonly associated perennial forbs include Phlox longifolia, Antennaria dimorpha, Crepis occidentalis, Erigeron pumilus, Allium acuminatum, and Astragalus purshii.
Dynamics: No Data Available
Environmental Description: The association occurs on gentle slopes with convex or straight microtopography in mid- and upper-slope positions at 1210-1700 m (4000-5600 feet) elevation. Soils are typically silt loams.
Geographic Range: The association is estimated to be moderately widespread with a range of approximately 28,000 square miles primarily in the Owyhee Uplands ecoregional section in southwestern Idaho, southeastern Oregon, and northern Nevada but also occurs in northeastern California.
Nations: US
States/Provinces: CA, ID, NV, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689952
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G2
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 |
| Subclass | 3.B Cool Semi-Desert Scrub & Grassland Subclass | S11 | 3.B |
| Formation | 3.B.1 Cool Semi-Desert Scrub & Grassland Formation | F033 | 3.B.1 |
| Division | 3.B.1.Ne Western North American Cool Semi-Desert Scrub & Grassland Division | D040 | 3.B.1.Ne |
| Macrogroup | 3.B.1.Ne.3 Big Sagebrush - Threetip Sagebrush - Antelope Bitterbrush Steppe & Shrubland Macrogroup | M169 | 3.B.1.Ne.3 |
| Group | 3.B.1.Ne.3.a Wyoming Big Sagebrush - Basin Big Sagebrush Steppe & Shrubland Group | G303 | 3.B.1.Ne.3.a |
| Alliance | A3184 Wyoming Big Sagebrush Dry Steppe & Shrubland Alliance | A3184 | 3.B.1.Ne.3.a |
| Association | CEGL001052 Wyoming Big Sagebrush / Thurber''s Needlegrass Shrubland | CEGL001052 | 3.B.1.Ne.3.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Artemisia tridentata / Stipa thurberiana Community (Blackburn et al. 1971)
= Artemisia tridentata / Stipa thurberiana Community (Blackburn et al. 1968b)
= Artemisia wyomingensis / Stipa thurberiana Habitat Type (Hironaka et al. 1983)
= Wyoming Big Sagebrush / Thurber’s Needlegrass Shrubland (Artemisia tridentata ssp. wyomingensis / Achnatherum thurberianum Shrubland) (Bell et al. 2009)
= Artemisia tridentata / Stipa thurberiana Community (Blackburn et al. 1968b)
= Artemisia wyomingensis / Stipa thurberiana Habitat Type (Hironaka et al. 1983)
= Wyoming Big Sagebrush / Thurber’s Needlegrass Shrubland (Artemisia tridentata ssp. wyomingensis / Achnatherum thurberianum Shrubland) (Bell et al. 2009)
- Bell, J., D. Cogan, J. Erixson, and J. Von Loh. 2009. Vegetation inventory project report, Craters of the Moon National Monument and Preserve. Natural Resource Technical Report NPS/UCBN/NRTR-2009/277. National Park Service, Fort Collins, CO. 358 pp.
- Blackburn, W. H., P. T. Tueller, and R. E. Eckert, Jr. 1968b. Vegetation and soils of the Crowley Creek watershed. Nevada Agricultural Experiment Station Bulletin R-42. Reno. 60 pp.
- Blackburn, W. H., P. T. Tueller, and R. E. Eckert, Jr. 1971. Vegetation and soils of the Rock Springs watershed. Nevada Agricultural Experiment Station Bulletin R-83. Reno. 116 pp.
- 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.
- Caicco, S. L., and C. A. Wellner. 1983i. Research Natural Area recommendation for Substation Tract. Unpublished report prepared for USDI Bureau of Land Management, Shoshone District, Idaho by Idaho Natural Areas Coordinating Committee. 11 pp.
- Caicco, S. L., and C. A. Wellner. 1983j. Research Natural Area recommendation for Big Juniper Kipuka. Unpublished report prepared for USDI Bureau of Land Management, Shoshone District, Idaho by Idaho Natural Areas Coordinating Committee.
- Hironaka, M., M. A. Fosberg, and A. H. Winward. 1983. Sagebrush-grass habitat types of southern Idaho. Forestry, Wildlife, and Range Experiment Station Bulletin No. 15, University of Idaho, Moscow. 44 pp.
- 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.
- Murphy, C. J., and S. K. Rust. 2000. Inventory and assessment of terrestrial vegetation on the 45 Ranch Allotment. Unpublished report prepared for The Nature Conservancy, Idaho Field Office, Boise. 88 pp.
- Peterson, E. B. 2008. International Vegetation Classification alliances and associations occurring in Nevada with proposed additions. Nevada Natural Heritage Program, Carson City, NV. 348 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.