Water uptake of riparian plants in the lower Lhasa River Basin, South Tibetan Plateau using stable water isotopes

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dc.contributor.authorRao, WBen_AU
dc.contributor.authorChen, Xen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorTan, HBen_AU
dc.contributor.authorGao, Men_AU
dc.contributor.authorLiu, JTen_AU
dc.date.accessioned2023-02-10T00:28:57Zen_AU
dc.date.available2023-02-10T00:28:57Zen_AU
dc.date.issued2020-05-25en_AU
dc.date.statistics2022-11-25en_AU
dc.description.abstractRiparian plants can adapt their water uptake strategies based on climatic and hydrological conditions within a river basin. The response of cold-alpine riparian trees to changes in water availability is poorly understood. The Lhasa River is a representative cold-alpine river in South Tibet and an under-studied environment. Therefore, a 96 km section of the lower Lhasa River was selected for a study on the water-use patterns of riparian plants. Plant water, soil water, groundwater and river water were measured at three sites for δ18O and δ2H values during the warm-wet and cold-dry periods in 2018. Soil profiles differed in isotope values between seasons and with the distance along the river. During the cold-dry period, the upper parts of the soil profiles were significantly affected by evaporation. During the warm-wet period, the soil profile was influenced by precipitation infiltration in the upper reaches of the study area and by various water sources in the lower reaches. Calculations using the IsoSource model indicated that the mature salix and birch trees (Salix cheilophila Schneid. and Betula platyphylla Suk.) accessed water from multiple sources during the cold-dry period, whereas they sourced more than 70% of their requirement from the upper 60–80 cm of the soil profile during the warm-wet period. The model indicated that the immature rose willow tree (Tamarix ramosissima Ledeb) accessed 66% of its water from the surface soil during the cold-dry period, but used the deeper layers during the warm-wet period. The plant type was not the dominant factor driving water uptake patterns in mature plants. Our findings can contribute to strategies for the sustainable development of cold-alpine riparian ecosystems. It is recommended that reducing plantation density and collocating plants with different rooting depths would be conducive to optimal plant growth in this environment. © 2020 John Wiley & Sons Ltden_AU
dc.description.sponsorshipFundamental Research Funds for the Central Universities, Grant/Award Number: 2019B45414; National Natural Sciences Foundation of China, Grant/Award Number: 91747203; Natural Science Foundation of Jiangsu Province, Grant/Award Number: BK20191304en_AU
dc.identifier.citationRao, W., Chen, X., Meredith, K. T., Tan, H., Gao, M., & Liu, J. (2020). Water uptake of riparian plants in the lower Lhasa River Basin, South Tibetan Plateau using stable water isotopes. Hydrological Processes, 34(16), 3492-3505. doi:10.1002/hyp.13831en_AU
dc.identifier.issn1099-1085en_AU
dc.identifier.issue16en_AU
dc.identifier.journaltitleHydrological Processesen_AU
dc.identifier.pagination3492-3505en_AU
dc.identifier.urihttps://doi.org/10.1002/hyp.13831en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14642en_AU
dc.identifier.volume34en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons, Incen_AU
dc.subjectWateren_AU
dc.subjectPlantsen_AU
dc.subjectTibeten_AU
dc.subjectChinaen_AU
dc.subjectStable isotopesen_AU
dc.subjectRiversen_AU
dc.subjectSoilsen_AU
dc.titleWater uptake of riparian plants in the lower Lhasa River Basin, South Tibetan Plateau using stable water isotopesen_AU
dc.typeJournal Articleen_AU
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