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Grazing-induced increases in soil moisture maintain higher productivity during droughts in alpine meadows on the Tibetan Plateau

文献类型：期刊论文

作者Zhang, Tao1,3; Xu, Mingjie3; Zhang, Yangjian1,2,4; Zhao, Tianhong3; An, Tingting3; Li, Yingge3; Sun, Yi3; Chen, Ning1,4; Zhao, Tingting3; Zhu, Juntao1,4
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2019-05-15
卷号269页码:249-256
关键词Grazing Carbon fluxes Evapotranspiration Drought Alpine meadow
ISSN号0168-1923
DOI10.1016/j.agrformet.2019.02.022
通讯作者Zhang, Yangjian(zhangyj@igsnrr.ac.cn)
英文摘要Grazing is the primary land use practice in alpine ecosystems on the Tibetan Plateau. However, it remains unclear how grazing regulates levels of carbon and the water cycle in this ecosystem. A paired set of eddy covariance systems were set in adjacent fenced (FM) and grazed meadows (GM) to explore the grazing effects on alpine meadows. Aboveground biomass removed by grazing caused declines in grass transpiration (T), whereas the evaporation (E) was enhanced because of greater exposure to radiation, which in turn led to higher evapotranspiration (ET) in GM. However, the deep-layer soil moisture remained high because of the effects of mattic epipedon, which worked as a water-resistant layer. Therefore, the deep-layer soil moisture in GM was higher than that in FM because of decreased water consumption caused by the grazing-induced reduction in leaf area in GM. As a consequence, the deep-layer soil in GM could provide more water to help plants endure droughts. Additionally, grazing enhanced the sensitivity of productivity to soil moisture during the wet season in drought years, which could restore grassland productivity more quickly after droughts. Therefore, grazing could help this fragile ecosystem to withstand droughts to some extent and maintain higher productivity. This may provide us with an ecological approach for confronting global climate change.
WOS关键词GAP FILLING STRATEGIES ; ECOSYSTEM CO2 EXCHANGE ; WATER-VAPOR EXCHANGE ; INNER-MONGOLIA ; CLIMATE-CHANGE ; ABOVEGROUND BIOMASS ; SPECIES COMPOSITION ; CARBON-DIOXIDE ; EVAPOTRANSPIRATION ; GRASSLAND
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA20050102] ; National Natural Science Foundation of China[31600362] ; National Natural Science Foundation of China[31500360] ; National Natural Science Foundation of China[41725003] ; China Postdoctoral Science Foundation[2018M631819] ; National Key R&D Program of China[2017YFA0604801]
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000463120900023
出版者ELSEVIER SCIENCE BV
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; National Key R&D Program of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/48180]  
专题地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心
通讯作者Zhang, Yangjian
作者单位1.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
3.Shenyang Agr Univ, Coll Agron, Postdoctoral Res Stn Crop Sci, Shenyang 110866, Liaoning, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Tao,Xu, Mingjie,Zhang, Yangjian,et al. Grazing-induced increases in soil moisture maintain higher productivity during droughts in alpine meadows on the Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,269:249-256.
APA Zhang, Tao.,Xu, Mingjie.,Zhang, Yangjian.,Zhao, Tianhong.,An, Tingting.,...&Yu, Guirui.(2019).Grazing-induced increases in soil moisture maintain higher productivity during droughts in alpine meadows on the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,269,249-256.
MLA Zhang, Tao,et al."Grazing-induced increases in soil moisture maintain higher productivity during droughts in alpine meadows on the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 269(2019):249-256.

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来源：地理科学与资源研究所

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