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CEGL002332 Pinus edulis - Juniperus osteosperma / Petradoria pumila Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Two-needle Pinyon - Utah Juniper / Rock-goldenrod Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is found in eastern Utah and western Colorado on upper topographic positions between 1841 and 2195 m (6050-7200 feet) elevation. It occurs on level to gently sloping sites on any aspect with thin soils over sandstone or shale bedrock. Litter, bedrock, and bare soil are the most common components of the ground cover. This woodland association has a short, open tree canopy dominated by evergreen tree species. Total vegetation cover is relatively sparse to moderate. The dominant tree species are Pinus edulis and Juniperus osteosperma; either species can have cover between 1 and 25%. The shrub layer is absent to moderate and has low diversity. Ephedra viridis, Gutierrezia sarothrae, and succulents, such as Echinocereus triglochidiatus, Opuntia polyacantha var. erinacea, Opuntia fragilis, and Yucca harrimaniae, are the most common species. The herbaceous layer has low cover, as well, but tends to have greater diversity. Common grasses, such as Achnatherum hymenoides, Bromus tectorum, Elymus elymoides, and Poa fendleriana, provide sparse cover. The forb Petradoria pumila is the most abundant herbaceous species and is characteristic of this association. Other forbs include Arenaria fendleri, Descurainia pinnata, Eriogonum alatum, Heterotheca villosa, Streptanthus cordatus, and Tetraneuris acaulis.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: On dry, rocky or slickrock sites on the Colorado Plateau, this pinyon-juniper woodland association may include stands with very open tree canopies (5-10% cover) in cases where the total vegetation cover is less than 15%. These stands are considered to be a variation of the woodland type because of the ecological values of the trees.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This woodland association has a short, open tree canopy dominated by evergreen tree species. Total vegetation cover is moderate to sparse, including some tree-dominated stands with <10% total vegetation cover as a best fit. The dominant tree species are Pinus edulis and Juniperus osteosperma which range between 2 and 10 m tall, and either species can have cover between 1 and 25% in the tree canopy. The shrub layer is absent to moderate and has low diversity. Ephedra viridis, Gutierrezia sarothrae, and succulents, such as Echinocereus triglochidiatus, Opuntia polyacantha var. erinacea (= Opuntia erinacea), Opuntia fragilis, and Yucca harrimaniae, are the most common species. The herbaceous layer has low cover, as well, but tends to have greater diversity. Common grasses, such as Achnatherum hymenoides, Bromus tectorum, Elymus elymoides, and Poa fendleriana, provide sparse cover. The forb Petradoria pumila is the most abundant herbaceous species and is characteristic of this association. Other forbs that may be present include Arenaria fendleri, Descurainia pinnata, Eriogonum alatum, Heterotheca villosa, Streptanthus cordatus, and Tetraneuris acaulis.
Dynamics: No Data Available
Environmental Description: This association is found on canyon rims, mesatops, and interfluves between 1841 and 2195 m elevation. It occurs on level to gently sloping sites and on any aspect. Soils are thin and usually well- to rapidly drained over sandstone or shale bedrock. Litter, bedrock, and bare soil are the most common components of the ground cover.
Geographic Range: This association is found in western Colorado and eastern Utah.
Nations: US
States/Provinces: CO, UT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.758260
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: GNR
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.a Two-needle Pinyon - Utah Juniper Woodland Group | G900 | 1.B.2.Nc.1.a |
| Alliance | A3573 Two-needle Pinyon - Utah Juniper Colorado Plateau Shrubby Open Woodland Alliance | A3573 | 1.B.2.Nc.1.a |
| Association | CEGL002332 Two-needle Pinyon - Utah Juniper / Rock-goldenrod Woodland | CEGL002332 | 1.B.2.Nc.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pinus edulis - Juniperus osteosperma / Petradoria pumila Woodland (Von Loh et al. 2007)
- Clark, D., M. Dela Cruz, T. Clark, J. Coles, S. Topp, A. Evenden, A. Wight, G. Wakefield, and J. Von Loh. 2009. Vegetation classification and mapping project report, Capitol Reef National Park. Natural Resource Report NPS/NCPN/NRTR--2009/187. National Park Service, Fort Collins, CO. 882 pp.
- Coles, J., A. Tendick, J. Von Loh, G. Bradshaw, G. Manis, A. Wight, G. Wakefield, and A. Evenden. 2010. Vegetation classification and mapping project report, Black Canyon of the Gunnison National Park. Natural Resource Technical Report NPS/NCPN/NRTR--2010/361. National Park Service, Fort Collins, CO.
- Coles, J., D. Cogan, D. Salas, A. Wight, G. Wakefield, J. Von Loh, and A. Evenden. 2008a. Vegetation classification and mapping project report, Dinosaur National Monument. Natural Resource Technical Report NPS/NCPN/NRTR-2008/112. National Park Service, Fort Collins, CO. 814 pp.
- Coles, J., J. Von Loh, A. Evenden, G. Manis, G. Wakefield. and A. Wight. 2008c. Vegetation classification and mapping project report, Natural Bridges National Monument. Natural Resource Technical Report NPS/NCPN/NRTR--2008/077. National Park Service, Fort Collins, CO. 390 pp.
- Romme, W. H., K. D. Heil, J. M. Porter, and R. Fleming. 1993. Plant communities of Capitol Reef National Park, Utah. USDI National Park Service, Technical Report NPS/NAUCARE/NRTER-93/02. Cooperative Park Studies Unit, Northern Arizona University. 37 pp.
- Von Loh, J., K. Landgraf, A. Evenden, T. Owens, S. Blauer, and M. Reid. 2007. Vegetation classification and mapping project report, Colorado National Monument. Natural Resource Report NPS/NCPN/NRTR--2007/061. National Park Service, Fort Collins, CO. 564 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.