Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021006 |
Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis | |
Lee, Esther1; Kumar, Praveen1; Barron-Gafford, Greg A.2,3; Hendryx, Sean M.4; Sanchez-Canete, Enrique P.3,5,6; Minor, Rebecca L.2; Colella, Tony2; Scott, Russell L.7 | |
2018-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:6页码:4009-4027 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Spain |
英文摘要 | A major challenge in critical zone science is to understand and predict the interaction between above-ground and below-ground ecohydrologic processes. One process that facilitates this connection is hydraulic redistribution, a phenomenon by which roots serve as preferential pathways for water movement from wet to dry soil layers. We use a multilayer canopy model in conjunction with experimental data to quantify the influence of hydraulic redistribution on ecohydrologic processes in order to characterize the competitive and facilitative interaction between mesquite trees and bunchgrasses in a semiarid savanna. Both measured and simulated results show that hydraulic descent dominates during the wet monsoon season, whereas hydraulic lift occurs between precipitation events. For 2015 year-long simulation, we find about 17% of precipitation is absorbed as soil moisture, with the rest of the precipitation returning to the atmosphere as evapotranspiration. In the wet season, 13% of precipitation is transferred to deep soil (>1.5 m) through roots, and in the dry season, 9% of this redistributed water is then transported back to shallow soil depths (<0.5 m). Assuming water supplied through hydraulic redistribution is well-mixed with moisture transported directly through the soil matrix and supports vegetation evapotranspiration, hydraulic redistribution supports 47% of mesquite transpiration and 9% of understory transpiration. Through modeling and experimental synthesis, this study demonstrates that in semiarid savanna ecosystems, mesquite exhibits a competitive advantage over understory bunchgrass through hydraulic redistribution. This analysis evaluates the relationship between two coexisting vegetation types that could be expanded to multiple vegetation species sharing resources in an ecosystem. |
英文关键词 | hydraulic redistribution water use semiarid |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440309900014 |
WOS关键词 | SOIL-WATER ; SAP FLOW ; ARTEMISIA-TRIDENTATA ; DESERT PHREATOPHYTE ; CLIMATE-CHANGE ; ROOT SYSTEMS ; DEEP ROOTS ; TREE ROOTS ; LIFT ; PLANTS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19950 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA; 2.Univ Arizona, Sch Geog & Dev, Tucson, AZ USA; 3.Univ Arizona, Coll Sci, Biosphere 2, Tucson, AZ USA; 4.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA; 5.IISTA CEAMA, Ctr Andaluz Medio Ambiente, Granada, Spain; 6.Univ Granada, Dept Fis Aplicada, Granada, Spain; 7.USDA ARS, Southwest Watershed Res Ctr, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Lee, Esther,Kumar, Praveen,Barron-Gafford, Greg A.,et al. Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis[J]. WATER RESOURCES RESEARCH,2018,54(6):4009-4027. |
APA | Lee, Esther.,Kumar, Praveen.,Barron-Gafford, Greg A..,Hendryx, Sean M..,Sanchez-Canete, Enrique P..,...&Scott, Russell L..(2018).Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis.WATER RESOURCES RESEARCH,54(6),4009-4027. |
MLA | Lee, Esther,et al."Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis".WATER RESOURCES RESEARCH 54.6(2018):4009-4027. |
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