Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2007.11.019 |
Partitioning the use of precipitation- and groundwater-derived moisture by vegetation in an arid ecosystem in California | |
McLendon, Terry; Hubbard, Paula J.; Martin, David W. | |
通讯作者 | McLendon, Terry |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
出版年 | 2008 |
卷号 | 72期号:6页码:986-1001 |
英文摘要 | Demands on groundwater supplies in and regions have increased interest in the importance of groundwater, relative to precipitation-derived moisture, to vegetation. Depth to water (DTW), precipitation (PPT), and vegetation (total perennial cover, TPC) data have been collected from 30 sites in the Owens Valley, California, since the 1980s. We used these data to construct water budgets for each site, and to calculate precipitation-use efficiencies (PUE) and amount of TPC supported by precipitation and by groundwater. We compared these values among five plant communities over different DTW and PPT regimes to determine relative importance of each water source. Our results confirm that both groundwater and precipitation are important sources of water to Owens Valley vegetation. In general, groundwater becomes more important as DTW decreases, but this relationship varies among communities. TPC increased as DTW decreased up to a point, after which TPC remained constant or declined. Some groundwater usage by shrub- and grass-dominated communities continued to DTW of 6-8 m. PUE was highest at low precipitation and decreased as precipitation increased. Our results indicate that vegetation preferentially used precipitation-derived soil moisture, even with abundant groundwater, and that successful management of groundwater-affected and ecosystems must account for complex interactions among multiple factors. (C) 2007 Elsevier Ltd. All rights reserved. |
英文关键词 | depth to water greasewood rabbitbrush sacaton saltbush saltgrass |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000255980400011 |
WOS关键词 | RAIN-USE EFFICIENCY ; SOIL-WATER ; GREAT-BASIN ; CHRYSOTHAMNUS-NAUSEOSUS ; SUMMER PRECIPITATION ; ARTEMISIA-TRIDENTATA ; SEASONAL PATTERNS ; COLORADO PLATEAU ; MOJAVE DESERT ; DEEP |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/157947 |
作者单位 | Los Angeles Dept Water & Power, Bishop, CA 93514 USA |
推荐引用方式 GB/T 7714 | McLendon, Terry,Hubbard, Paula J.,Martin, David W.. Partitioning the use of precipitation- and groundwater-derived moisture by vegetation in an arid ecosystem in California[J],2008,72(6):986-1001. |
APA | McLendon, Terry,Hubbard, Paula J.,&Martin, David W..(2008).Partitioning the use of precipitation- and groundwater-derived moisture by vegetation in an arid ecosystem in California.JOURNAL OF ARID ENVIRONMENTS,72(6),986-1001. |
MLA | McLendon, Terry,et al."Partitioning the use of precipitation- and groundwater-derived moisture by vegetation in an arid ecosystem in California".JOURNAL OF ARID ENVIRONMENTS 72.6(2008):986-1001. |
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