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Pinus jeffreyi / Purshia tridentata Woodland | Western Ecology Working Group of...
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Name: Pinus jeffreyi / Purshia tridentata Woodland Reference: Western Ecology Working Group of... Description: 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. <i>Pinus jeffreyi</i> is the sole mature tree in sampled stands. The canopy is from 20-35 m in height. <i>Pinus jeffreyi</i> saplings occur infrequently in the shrub layer. Shrub cover ranges from 10-20% with <i>Artemisia tridentata</i> and <i>Purshia tridentata</i>. The herbaceous layer is sparse. <i>Elymus elymoides</i> is the only frequent species in the herb layer. Other herb species include <i>Wyethia mollis, Cryptantha echinella, Eriogonum spergulinum, Leptodactylon pungens</i>, and the non-native <i>Bromus tectorum</i>. Total vegetation cover is 50-70%. Total species number about 50 in the 4 plots sampled locally.  Accession Code: VB.CC.33437.CEGL008624 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.684426 NatureServe Explorer   Translated: Jeffrey Pine / Antelope Bitterbrush Woodland   Scientific: Pinus jeffreyi / Purshia tridentata Woodland   Code: CEGL008624