Arid
DOI10.1007/s00442-009-1455-1
Patterns of Tamarix water use during a record drought
Nippert, Jesse B.1,2; Butler, James J., Jr.2; Kluitenberg, Gerard J.3; Whittemore, Donald O.2; Arnold, Dave4; Spal, Scott E.1; Ward, Joy K.1
通讯作者Nippert, Jesse B.
来源期刊OECOLOGIA
ISSN0029-8549
EISSN1432-1939
出版年2010
卷号162期号:2页码:283-292
英文摘要

During a record drought (2006) in southwest Kansas, USA, we assessed groundwater dynamics in a shallow, unconfined aquifer, along with plant water sources and physiological responses of the invasive riparian shrub Tamarix ramosissima. In early May, diel water table fluctuations indicated evapotranspirative consumption of groundwater by vegetation. During the summer drought, the water table elevation dropped past the lowest position previously recorded. Concurrent with this drop, water table fluctuations abruptly diminished at all wells at which they had previously been observed despite increasing evapotranspirative demand. Following reductions in groundwater fluctuations, volumetric water content declined corresponding to the well-specific depths of the capillary fringe in early May, suggesting a switch from primary dependence on groundwater to vadose-zone water. In at least one well, the fluctuations appear to re-intensify in August, suggesting increased groundwater uptake by Tamarix or other non-senesced species from a deeper water table later in the growing season. Our data suggest that Tamarix can rapidly shift water sources in response to declines in the water table. The use of multiple water sources by Tamarix minimized leaf-level water stress during drought periods. This study illustrates the importance of the previous hydrologic conditions experienced by site vegetation for controlling root establishment at depth and demonstrates the utility of data from high-frequency hydrologic monitoring in the interpretation of plant water sources using isotopic methods.


英文关键词Diel water table fluctuations Ecohydrology Phreatophyte Stable isotopes
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000273795200002
WOS关键词RIPARIAN VEGETATION RESPONSE ; SOUTHWESTERN UNITED-STATES ; MOJAVE DESERT FLOODPLAIN ; EDDY COVARIANCE ; RAMOSISSIMA ; RIVER ; DECLINE ; REGIMES ; STRESS ; TREES
WOS类目Ecology
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/2XILL650/165801
作者单位1.Univ Kansas, Dept Ecol & Evolutionary Biol, Lawrence, KS 66045 USA;
2.Univ Kansas, Kansas Geol Survey, Lawrence, KS 66047 USA;
3.Kansas State Univ, Dept Agron, Manhattan, KS 66506 USA;
4.Arnold Ranch, Ashland, KS 67831 USA
推荐引用方式
GB/T 7714
Nippert, Jesse B.,Butler, James J., Jr.,Kluitenberg, Gerard J.,et al. Patterns of Tamarix water use during a record drought[J],2010,162(2):283-292.
APA Nippert, Jesse B..,Butler, James J., Jr..,Kluitenberg, Gerard J..,Whittemore, Donald O..,Arnold, Dave.,...&Ward, Joy K..(2010).Patterns of Tamarix water use during a record drought.OECOLOGIA,162(2),283-292.
MLA Nippert, Jesse B.,et al."Patterns of Tamarix water use during a record drought".OECOLOGIA 162.2(2010):283-292.
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