词条 | Sagebrush scrub |
释义 |
It often occurs adjacent to Pinyon-juniper woodland communities, between 4,000 and 7,000 feet elevation, and where annual precipitation is 8"-15", much falling as snow.[6] Sometimes it occurs in pure stands of sagebrush, or with associates that vary from region to region.[2] Sagebrush scrub may occur as an understory of pinyon-juniper woodland.[2] Mojave DesertIn the Mojave Desert, sagebrush associates include saltbrush (Atriplex spp.), rubber rabbitbrish (Ericameria nauseosa), green ephedra (Ephedra vidris), hot-sage (Grayia spinosa), and bitterbrush (Purshia glandulosa).[2] Sierra NevadasSagebrush scrub occurs in relatively deep soils along the Sierra-Cascade axis, running from Modoc County, CA to San Bernardino County, CA.[4] In the Sierra Nevada range in California sagebrush associates include bitterbrush (Purshia tridentata), curl-leaf mountain-mahogany (Cercocarpus ledifolius), and rabbitbrushes (Chrysothamnus spp., Ericameria spp.).[1] Average summer temperatures are in the 80's Fahrenheit, and 10-20 degrees F in the winter.[1] It can survive on 7 inches of annual precipitation, so is generally below the Piñon-Juniper Woodland vegetation type, which requires 12 to 20 inches.[1] Its range is 4,200 to 7,000 feet in the Eastern Sierra Nevada range in California.[1] References1. ^1 2 3 4 Karen Wiese, Sierra Nevada Wildflowers, 2013, p. 18-19 2. ^1 2 3 4 5 Pam Mackay, Mojave Desert Wildflowers, p19 3. ^Damian Fagan, Canyon Country Wildflowers, p3 4. ^1 Introduction to California Plant Life, RObert Ornduff, Phyllis M. Faber, Todd Keeler-Wolf, revised ed., 2003, p. 213-214 1 : Deserts and xeric shrublands in the United States |
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