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Pinus edulis / Achnatherum scribneri Woodland | Western Ecology Working Group of...
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Name: Pinus edulis / Achnatherum scribneri Woodland Reference: Western Ecology Working Group of... Description: The center of distribution for this association is the central mountain corridor of New Mexico with outliers in southeastern Colorado. It is specifically known from the Sierra Oscura, San Andres Mountains, and Organ Mountains of the south-central Rio Grande corridor, and likely in the Manzano, Sandia, and Sacramento mountains. It is characterized by a relatively dense and tall overstory of Pinus edulis (>9 m, 30+ feet) with Juniperus monosperma (or occasionally Juniperus deppeana) scattered in the subcanopy. Pinus edulis regeneration is usually present, Juniperus monosperma less so. A grassy understory of well-represented to abundant Achnatherum scribneri (= Stipa scribneri) or Achnatherum lobatum (= Stipa lobata) is characteristic. Muhlenbergia pauciflora can be common but is clearly not the dominant. Scattered shrubs occur, but total shrub cover seldom exceeds 5%. Cercocarpus montanus, Yucca baccata, Quercus X pauciloba (= Quercus undulata), and Opuntia phaeacantha are the most conspicuous shrub species. Forb species richness is high (66 species), and cover reaches 5% in some stands. This association is typically found at mid to high elevations of 1890-2590 m (6200-8500 feet), on north-facing mountain slopes. Slope positions vary from gentle dip slopes to steep escarpments. The larger stands are particularly evident on the long, gently sloping dip slopes of the major fault block mountains. Soils range from well-developed Mollisols or Alfisols with high nutrient status to drier and more poorly developed Inceptisols. Although gravel and cobble content can be high, water-holding capacity is probably moderate. Secondary calcium carbonate accumulations can occur, including indurated petrocalcic horizons, which can limit root penetration.  Accession Code: VB.CC.23770.PINUSEDULISACHN Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Pinus edulis - (Juniperus spp.) Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Two-needle Pinyon / Scribner's Needlegrass Woodland   UID: ELEMENT_GLOBAL.2.687328 NatureServe Explorer   Code: CEGL000798   Scientific: Pinus edulis / Achnatherum scribneri Woodland (convergence) and Synonyms: (undetermined) Pinus edulis / Achnatherum scribneri Woodland