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Juniperus occidentalis Wooded Tall Herbaceous Alliance | Western Ecology Working Group of...
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Name: Juniperus occidentalis Wooded Tall Herbaceous Alliance Reference: Western Ecology Working Group of... Description: Vegetation within this alliance is located at the mesic fringe of the steppe habitats of the interior Pacific Northwest between 600 and 1800 m elevation. Throughout this range the climate is semi-arid, with 23-36 cm of precipitation annually, the maximum occurring in winter. The temperature regime is cool summer-continental, with a wide range in diurnal temperatures and night frosts through most of the year. Summer lightning storms and associated fires are common in the environments where this type occurs and are presumably important in structuring the vegetation. Generally, soils are medium-textured, with abundant coarse fragments, often derived from volcanic parent materials or aeolian deposits. Vegetation within this alliance is usually characterized by a sparse overstory of Juniperus occidentalis. Cercocarpus ledifolius, a tall shrub or small tree, may also be abundant. Other shrubs which commonly occur in these woodlands are Purshia tridentata, Ericameria nauseosa (= Chrysothamnus nauseosus), Prunus virginiana, Ribes cereum, and Artemisia spp. There is a well-developed herbaceous layer of robust perennial bunch grasses dominated by Leymus cinereus, usually well over 1 m in height. Contiguous vegetation is most commonly Pinus ponderosa forests, Juniperus occidentalis woodlands, or Artemisia steppe.  Accession Code: VB.CC.21391.JUNIPERUSOCCIDE Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Juniperus occidentalis Wooded Tall Herbaceous Alliance   Translated: Western Juniper Wooded Tall Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.124926 NatureServe Explorer   Code: A.1489