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CEGL008624 Pinus jeffreyi / Purshia tridentata Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Jeffrey Pine / Antelope Bitterbrush Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This woodland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Elevations range from 2195-2470 m (7200-8100 feet), and aspects are variable. This association is found in low to high slope positions, but all sites are considered uplands. Soils are rapidly drained to well-drained sands and sandy loams derived primarily from igneous rock. Litter/duff cover ranges from 5-95%. This association is also reported from the volcanic ash flows and welded volcanic tufa south of the Mono Craters. Soils are orthic humic Entisols. Most precipitation falls as snow which reaches 1 m deep and may persist on the ground for three months. Precipitation is estimated at being 30-40 cm (12-16 inches) per year. Pinus jeffreyi is the sole mature tree in sampled stands. The canopy is from 20-35 m in height. Pinus jeffreyi saplings occur infrequently in the shrub layer. Shrub cover ranges from 10-20% with Artemisia tridentata and Purshia tridentata. The herbaceous layer is sparse. Elymus elymoides is the only frequent species in the herb layer. Other herb species include Wyethia mollis, Cryptantha echinella, Eriogonum spergulinum, Linanthus pungens, and the non-native Bromus tectorum. Total vegetation cover is 50-70%. Total species number about 50 in the 4 plots sampled locally.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Several similar associations exist on the Modoc Plateau (Smith 1994b).
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Pinus jeffreyi is the sole mature tree in sampled stands. The canopy is from 20-35 m in height. Pinus jeffreyi saplings occur infrequently in the shrub layer. Shrub cover ranges from 10-20% with Artemisia tridentata and Purshia tridentata. The herbaceous layer is sparse. Elymus elymoides is the only frequent species in the herb layer. Other herb species include Wyethia mollis, Cryptantha echinella, Eriogonum spergulinum, Linanthus pungens (= Leptodactylon pungens), and the non-native Bromus tectorum. Total vegetation cover is 50-70%. Total species number about 50 in the 4 plots sampled locally.
Dynamics: No Data Available
Environmental Description: This association is found in low to high slope positions, but all sites are considered uplands. Soils are rapidly drained to well-drained sands and sandy loams derived primarily from igneous rock. Litter/duff cover ranges from 5-95%. Taylor (1990) reports this association from the volcanic ash flows and welded volcanic tufa south of the Mono Craters. Soils are orthic humic Entisols. Most precipitation falls as snow which reaches 1 m deep and may persist on the ground for three months. Precipitation is estimated at being 30-40 cm (12-16 inches) per year.
Geographic Range: This association has only described from Yosemite National Park and from the Indiana Summit Research Natural Area (Taylor 1990) in California.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684426
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G3G4
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.Nd Vancouverian Forest & Woodland Division | D192 | 1.B.2.Nd |
| Macrogroup | 1.B.2.Nd.2 Incense-cedar - Jeffrey Pine - Sierra White Fir Forest Macrogroup | M023 | 1.B.2.Nd.2 |
| Group | 1.B.2.Nd.2.a Incense-cedar - Sugar Pine - Sierra White Fir Forest & Woodland Group | G344 | 1.B.2.Nd.2.a |
| Alliance | A3676 Jeffrey Pine - Washoe Pine Mixed Conifer Woodland Alliance | A3676 | 1.B.2.Nd.2.a |
| Association | CEGL008624 Jeffrey Pine / Antelope Bitterbrush Woodland | CEGL008624 | 1.B.2.Nd.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pinus jeffreyi / Purshia tridentata var. tridentata (Sawyer et al. 2009) [87.020.21]
= Pinus jeffreyi/Purshia tridentata Woodland (Keeler-Wolf et al. 2012)
= Pinus jeffreyi/Purshia tridentata Woodland (Keeler-Wolf et al. 2012)
- Keeler-Wolf, T., M. Schindel, S. San, P. Moore, and D. Hickson. 2003a. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. Unpublished report by NatureServe in cooperation with the California Native Plant Society and California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch, Sacramento, CA.
- Keeler-Wolf, T., P. E. Moore, E. T. Reyes, J. M. Menke, D. N. Johnson, and D. L. Karavidas. 2012. Yosemite National Park vegetation classification and mapping project report. Natural Resource Technical Report NPS/YOSE/NRTR--2012/598. National Park Service, Fort Collins, CO.
- Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
- Smith, S. 1994b. Ecological guide to eastside pine plant associations, northeastern California. R5-ECOL-TP-004. USDA Forest Service, Pacific Southwest Region, San Francisco, CA. 174 pp.
- Taylor, D. W. 1990. Indian Summit RNA. Pages 72-73 in: T. Keeler-Wolf. Ecological surveys of Forest Service Research Natural Areas in California. General Technical Report PSW-125. USDA Forest Service, Pacific Southwest Research Station, Berkeley, CA.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.