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Grazing-induced increases in soil moisture maintain higher productivity during droughts in alpine meadows on the Tibetan Plateau
Zhang, Tao1,3; Xu, Mingjie1; Zhang, Yangjian2,3,4; Zhao, Tianhong1; An, Tingting1; Li, Yingge1; Sun, Yi1; Chen, Ning2,3; Zhao, Tingting1; Zhu, Juntao2,3; Yu, Guirui2
2019-05-15
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
Volume269Pages:249-256
Corresponding AuthorZhang, Yangjian(zhangyj@igsnrr.ac.cn)
AbstractGrazing 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.
KeywordGrazing Carbon fluxes Evapotranspiration Drought Alpine meadow
DOI10.1016/j.agrformet.2019.02.022
WOS KeywordGAP FILLING STRATEGIES ; ECOSYSTEM CO2 EXCHANGE ; WATER-VAPOR EXCHANGE ; INNER-MONGOLIA ; CLIMATE-CHANGE ; ABOVEGROUND BIOMASS ; SPECIES COMPOSITION ; CARBON-DIOXIDE ; EVAPOTRANSPIRATION ; GRASSLAND
Indexed BySCI
Language英语
Funding ProjectStrategic 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]
Funding OrganizationStrategic 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
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000463120900023
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/48181
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Yangjian
Affiliation1.Shenyang Agr Univ, Coll Agron, Postdoctoral Res Stn Crop Sci, Shenyang 110866, Liaoning, 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, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
Recommended Citation
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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