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CEGL001715 Juniperus occidentalis / Artemisia arbuscula / Poa secunda Wooded Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Western Juniper / Little Sagebrush / Sandberg Bluegrass Wooded Grassland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is known from the central Blue and Ochoco mountains, and from the Steens Mountains in the northern Great Basin. It occurs in shallow scablands where sufficient moisture and basalt cracks allow for the establishment of Juniperus occidentalis. Slopes are generally fairly flat (2-15%) at elevations of 1220 to 1770 m (4000-5800 feet). Soils are usually of igneous parent material (lava) of a sandy loam to loamy character. This is a savanna-like assemblage with Juniperus occidentalis occurring in open stands (less than 5% cover). Artemisia arbuscula cover is about 7-22%. Individual plants of this species are often concealed by surrounding bunchgrasses. Poa secunda ranges between 4-20% cover, while Festuca idahoensis and Pseudoroegneria spicata range 0-40% and 0-50%, respectively. Poa secunda gains importance at lower slopes with concave topography and with heavy grazing.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Hall (1973) and Johnson and Clausnitzer (1992) describe a Juniperus occidentalis - Artemisia arbuscula association that is equivalent to this.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This is a savanna-like assemblage with Juniperus occidentalis occurring in open stands (less than 5% cover). Artemisia arbuscula cover is about 7-22%. Individual plants of this species are often concealed by surrounding bunchgrasses. Poa secunda ranges between 4-20% cover, while Festuca idahoensis and Pseudoroegneria spicata range 0-40% and 0-50%, respectively. Poa secunda gains importance at lower slopes with concave topography and with heavy grazing.
Dynamics: No Data Available
Environmental Description: It occurs in shallow scablands where sufficient moisture and basalt cracks allow for the establishment of Juniperus occidentalis. Slopes are generally fairly flat (2-15%) at elevations of 1220 to 1770 m (4000-5800 feet). Soils are usually of igneous parent material (lava) of a sandy loam to loamy character.
Geographic Range: This association is known from the central Blue and Ochoco mountains, and from the Steens Mountains in the northern Great Basin. While not described, it might occur in extreme northeastern California or along the northern Nevada border.
Nations: US
States/Provinces: CA?, OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688659
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G2
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.2 Cool Temperate Forest & Woodland Formation | F008 | 1.B.2 |
| Division | 1.B.2.Nc Western North American Pinyon - Juniper Woodland & Scrub Division | D010 | 1.B.2.Nc |
| Macrogroup | 1.B.2.Nc.1 Singleleaf Pinyon - Utah Juniper - Western Juniper Intermountain Woodland Macrogroup | M896 | 1.B.2.Nc.1 |
| Group | 1.B.2.Nc.1.b Western Juniper Open Woodland Group | G248 | 1.B.2.Nc.1.b |
| Alliance | A3500 Western Juniper Grassy Open Woodland Alliance | A3500 | 1.B.2.Nc.1.b |
| Association | CEGL001715 Western Juniper / Little Sagebrush / Sandberg Bluegrass Wooded Grassland | CEGL001715 | 1.B.2.Nc.1.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Juniperus occidentalis - Artemisia arbuscula (Hall 1973)
= Juniperus occidentalis - Artemisia arbuscula (Johnson and Clausnitzer 1992)
= Juniperus occidentalis - Artemisia arbuscula (Johnson and Clausnitzer 1992)
- 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.
- Hall, F. C. 1973. Plant communities of the Blue Mountains in eastern Oregon and southeastern Washington. R6 Area Guide 3-1. USDA Forest Service, Pacific Northwest Region, Portland, OR. 62 pp.
- Hall, F. C. 1978. Western juniper in association with other tree species. Pages in: R. E. Martin, J. E. Dealy, and D. L. Caraher, editors. Proceedings of the western juniper ecology/management workshop, January 1977, Bend, Oregon. General Technical Report PNW-74. USDA Forest Service, Pacific Northwest Range and Forest Experiment Station, Portland, OR.
- 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.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.