Arid
DOI10.1016/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
ISSN0140-1963
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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