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Spatiotemporal patterns of coexisting plant water uptake in ecologically vulnerable areas along the southeast margin of the Qinghai-Tibet Plateau

文献类型：期刊论文

作者Chen, Guo4,5,6; Wang, Peng5; Wang, Xiang2,6; Wang, Yan5; Liu, Jinzhao3; Tang, Xiaolu4,5,6; Song, Ci1
刊名JOURNAL OF HYDROLOGY
出版日期2026-02-01
卷号665页码:134645
关键词Stable isotopes Water use strategy Qinghai-Tibet plateau Chlorophyll fluorescence Elevation
ISSN号0022-1694
DOI10.1016/j.jhydrol.2025.134645
产权排序4
文献子类Article
英文摘要Improving the understanding of plant water uptake strategies and the underlying mechanisms in ecologically vulnerable regions significantly contributes to the local ecological protection and hydrological management. However, the water uptake patterns of different growth forms, as well as the relative importance of belowground and aboveground stresses on plant water uptake variations within and between life forms under the dual influences of human activities (e.g. tunneling) and environment, are not sufficiently understood in this region. Isotope, soil water content, and chlorophyll fluorescence indicator (Fv/Fm) were combinedly used to investigate patterns of water uptake in four areas (low elevation-LE, middle elevation with tunneling-MT, intermediate elevation without tunneling-MUT, and high elevation-HE) along a southeastern margin of the Qinghai-Tibet Plateau. In LE and HE, plants used high proportion (55.1 %) of shallow water during the early growth season (May), whereas the contribution of shallow water was low (30.4 %) in intermediate elevations in this season. An average 11.4 % higher contribution from shallow soil water and 5.1 % lower contribution from groundwater in MUT compared to MT was observed in the period of tunneling, which was related to the hydrological change by tunneling. Belowground stress exhibited a significant correlation with the contribution of the 0-40 cm soil layer for herbs, whereas aboveground stress was significantly correlated with the contribution of a deeper layer (40-80 cm) for trees. The links between niche overlap and belowground stress explained the varied water uptake proportions for different plant forms. This study emphasized the effect of tunneling on plant water uptakes and varied strategies of adaptation on belowground and aboveground stresses for coexisting plants.
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WOS关键词SOIL-WATER ; CLIMATE-CHANGE ; ISOTOPE COMPOSITION ; PINUS-SYLVESTRIS ; STABLE-ISOTOPE ; PRECIPITATION ; TEMPERATURE ; VEGETATION ; TRAITS ; DEPTH
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:001632681600003
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/219674]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Chen, Guo; Liu, Jinzhao
作者单位1.Chengdu Univ Technol, Coll Environm & Civil Engn, Chengdu 610059, Sichuan, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China;
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess Sci, Xian 710061, Peoples R China;
4.Tianfu Yongxing Lab, Res Inst Carbon Sequestrat & Ecol Restorat, Chengdu 610213, Peoples R China;
5.Chengdu Univ Technol, Coll Ecol & Environm, Chengdu 610059, Sichuan, Peoples R China;
6.Chengdu Univ Technol, Coll Geog & Planning, Chengdu 610059, Sichuan, Peoples R China;
推荐引用方式
GB/T 7714		 Chen, Guo,Wang, Peng,Wang, Xiang,et al. Spatiotemporal patterns of coexisting plant water uptake in ecologically vulnerable areas along the southeast margin of the Qinghai-Tibet Plateau[J]. JOURNAL OF HYDROLOGY,2026,665:134645.
APA Chen, Guo.,Wang, Peng.,Wang, Xiang.,Wang, Yan.,Liu, Jinzhao.,...&Song, Ci.(2026).Spatiotemporal patterns of coexisting plant water uptake in ecologically vulnerable areas along the southeast margin of the Qinghai-Tibet Plateau.JOURNAL OF HYDROLOGY,665,134645.
MLA Chen, Guo,et al."Spatiotemporal patterns of coexisting plant water uptake in ecologically vulnerable areas along the southeast margin of the Qinghai-Tibet Plateau".JOURNAL OF HYDROLOGY 665(2026):134645.

入库方式： OAI收割

来源：地理科学与资源研究所

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