Arid
DOI10.1029/2009WR008842
Hydrologic response to precipitation pulses under and between shrubs in the Chihuahuan Desert, Arizona
Moran, M. S.1; Hamerlynck, E. P.1; Scott, R. L.1; Stone, J. J.1; Collins, C. D. Holifield1; Keefer, T. O.1; Bryant, R.1; DeYoung, L.2; Nearing, G. S.4; Sugg, Z.5; Hymer, D. C.3
通讯作者Moran, M. S.
来源期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2010
卷号46
英文摘要

Observations of the temporal and spatial distribution of poststorm soil moisture in open shrublands and savannas are limited, yet they are critical to understanding the interaction and feedback between moisture distribution and canopies. The objective of this analysis was to study the hydrologic impacts of precipitation pulses on the upper layer of soils under and between shrubs. The study was based on measurements of precipitation, runoff, and under-and between-shrub soil moisture over a period of 20 years (1990-2009) at a shrub-dominated site in the Walnut Gulch Experimental Watershed (WGEW) near Tombstone, Arizona. Within much of the root zone (to 30 cm depth), infiltration was not significantly different under versus between shrubs, and the under: between infiltration ratio was not related to pulse size or intensity. However, root-zone soil moisture was significantly higher between shrubs than under shrubs. The soil moisture measured at the surface (at 5 cm depth) was not consistently different under and between shrubs, but the soil moisture measured at depths of 15 and 30 cm were both significantly higher between shrubs than under shrubs. Considering mechanisms that explain the interaction between plants and soil moisture, we found no differences in infiltration, evaporative losses, and surface soil moisture in locations under and between shrubs. This led to the conclusion that lower root-zone soil moisture under shrubs was due largely to greater root density under shrubs than between shrubs. This study adds to the understanding of the impact of precipitation patterns on infiltration and soil moisture in shrub-dominated sites and the potential for vegetation change in arid and semiarid lands.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000285012200004
WOS关键词SOIL-MOISTURE SENSORS ; WATER-UPTAKE ; NEW-MEXICO ; TEMPORAL DYNAMICS ; SPATIAL-PATTERNS ; MOJAVE DESERT ; WOODY-PLANTS ; VEGETATION ; TEMPERATURE ; GRASSLAND
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/166628
作者单位1.ARS, USDA, SW Watershed Res Ctr, Tucson, AZ 85719 USA;
2.Univ Arizona, Sch Nat Resources, Tucson, AZ 85721 USA;
3.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA;
4.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85719 USA;
5.Univ Arizona, Dept Geog & Dev, Tucson, AZ 85721 USA
推荐引用方式
GB/T 7714
Moran, M. S.,Hamerlynck, E. P.,Scott, R. L.,et al. Hydrologic response to precipitation pulses under and between shrubs in the Chihuahuan Desert, Arizona[J]. University of Arizona,2010,46.
APA Moran, M. S..,Hamerlynck, E. P..,Scott, R. L..,Stone, J. J..,Collins, C. D. Holifield.,...&Hymer, D. C..(2010).Hydrologic response to precipitation pulses under and between shrubs in the Chihuahuan Desert, Arizona.WATER RESOURCES RESEARCH,46.
MLA Moran, M. S.,et al."Hydrologic response to precipitation pulses under and between shrubs in the Chihuahuan Desert, Arizona".WATER RESOURCES RESEARCH 46(2010).
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