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CEGL000775 Pinus edulis - Juniperus osteosperma / Arctostaphylos pungens Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Two-needle Pinyon - Utah Juniper / Pointleaf Manzanita Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: These open woodlands have been described from canyon sides, terraces, benches and elevated plains in central and north-central Arizona and may extend into adjacent Utah and southwestern New Mexico. Elevations range from 1520-2440 m. Sites are flat to steep slopes often with southern aspects. Substrates are rocky soil derived from sandstone or limestone. Stands have a total vegetation cover of 20-60%. They are patchy with an open (>5% cover) conifer tree canopy 3-8 m tall that is codominated by Pinus edulis and Juniperus osteosperma. The short-shrub layer has over 25% cover and is often a dense and diverse thicket dominated by the evergreen sclerophyllous shrubs Arctostaphylos pungens and Quercus turbinella. Other shrub species often include Garrya flavescens, Ephedra viridis, Yucca baccata, Artemisia tridentata, Amelanchier spp., Cercocarpus montanus, Cercocarpus intricatus, Mahonia fremontii, Purshia stansburiana, Yucca baccata, Rhus trilobata, and Glossopetalon spinescens. The herbaceous layer is typically sparse if present and is composed of scattered forbs and graminoids. The dominance of Arctostaphylos pungens often with Quercus turbinella in the dense, short-shrub layer, and the sparse herbaceous cover separate this association from other Pinus edulis - Juniperus osteosperma woodlands. Small treeless thickets are included in this association.
Diagnostic Characteristics: This plant association exhibits a chaparralic expression of shrubs (i.e., dense shrubs), but relatively minor herbs. Arctostaphylos pungens is often well-represented or abundant.
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Stands have a total vegetation cover of 20-60%. They are patchy with an open (>5% cover) conifer tree canopy 3-8 m tall that is codominated by Pinus edulis and Juniperus osteosperma. The short-shrub layer has over 25% cover and is often a dense and diverse thicket dominated by the evergreen sclerophyllous shrubs Arctostaphylos pungens and Quercus turbinella. Other shrub species often include Garrya flavescens, Ephedra viridis, Yucca baccata, Artemisia tridentata, Amelanchier spp., Cercocarpus montanus, Cercocarpus intricatus, Mahonia fremontii, Purshia stansburiana, Yucca baccata, Rhus trilobata, and Glossopetalon spinescens. The herbaceous layer is typically sparse if present and is composed of scattered forbs and graminoids. The dominance of Arctostaphylos pungens often with Quercus turbinella in the dense, short-shrub layer, and the sparse herbaceous cover separate this association from other Pinus edulis - Juniperus osteosperma woodlands.
Dynamics: Fires are probably a major disturbance factor considering the strong expression of manzanita (Harris 1988a).
Environmental Description: These open woodlands have been described from canyon sides, terraces, benches and elevated plains in central and north-central Arizona and may extend into southwestern New Mexico. Elevations range from 1520-2440 m. Sites are flat to steep slopes often with southern aspects. Substrates are rocky soil derived from sandstone or limestone.
Geographic Range: Stands have been described from the Globe Ranger District, Tonto National Forest, and from the Grand Canyon National Park, north of the Colorado River in Arizona and possibly adjacent Utah. However, this vegetation is a widespread type along the Mogollon Rim and may extend into mountains in southwestern New Mexico.
Nations: US
States/Provinces: AZ, NM?, UT?
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.685188
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G3
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 | A3571 Two-needle Pinyon - Utah Juniper / Shrub Understory Foothill & Lower Montane Dry-Mesic Woodland Alliance | A3571 | 1.B.2.Nc.1.a |
| Association | CEGL000775 Two-needle Pinyon - Utah Juniper / Pointleaf Manzanita Woodland | CEGL000775 | 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 / Arctostaphylos pungens (Stuever and Hayden 1997b)
- 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.
- Harris, H. T. 1988a. Arctostaphylos pungens. In: Fire Effects Information System [Online]. USDA Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). [http://www.fs.fed.us/database/feis/]
- Kearsley, M. J. C., K. Green, M. Tukman, M. Reid, M. Hall, T. J. Ayers, and K. Christie. 2015. Grand Canyon National Park-Grand Canyon / Parashant National Monument vegetation classification and mapping project. Natural Resource Report NPS/GRCA/NRR--2015/913. National Park Service, Fort Collins, CO. 75 pp. plus appendices.
- Larson, M., and W. H. Moir. 1987. Forest and woodland habitat types of northern New Mexico and northern Arizona. Edition 2. USDA Forest Service, Southwestern Region, Albuquerque, NM.
- Moir, W. H., and J. O. Carleton. 1987. Classification of pinyon-juniper (P-J) sites on national forests in the Southwest. Pages 216-226 in: R. L. Everett, editor. Proceedings of the Pinyon-Juniper Conference, Reno, NV, 13-16 January 1986. General Technical Report. USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, UT. 581 pp.
- Reid, M. S., and M. E. Hall. 2010. Vegetation classification of Grand Canyon National Park. Draft report submitted to National Park Service, Fort Collins, CO.
- Stuever, M. C., and J. S. Hayden. 1997b. Plant associations of Arizona and New Mexico. Volume 2: Woodlands. USDA Forest Service, Southwestern Region, Habitat Typing Guides. 196 pp.
- USFS [U.S. Forest Service]. 1987a. Forest and woodland habitat types (plant associations) of northern New Mexico and northern Arizona. USDA Forest Service, Southwestern Region, Albuquerque, NM. Second edition, 170 pp. plus insert.
- USFS [U.S. Forest Service]. 1987b. Forest and woodland habitat types (plant associations) of Arizona south of the Mogollon Rim and southwestern New Mexico. USDA Forest Service, Southwestern Region, Albuquerque, NM. Second edition, 168 pp. plus insert.
- Warren, P. L., K. L. Reichhardt, D. A. Mouat, B. T. Brown, and R. R. Johnson. 1982. Vegetation of Grand Canyon National Park. Cooperative National Park Resources Studies Unit Technical Report 9. Tucson, AZ. 140 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.