Grazing alters environmental control mechanisms of evapotranspiration in an alpine meadow of the Tibetan Plateau
An, Tingting1; Xu, Mingjie1; Zhang, Tao1; Yu, Chengqun2; Li, Yingge1; Chen, Ning2; Zu, Jiaxing2; Li, Junxiang3; Zhu, Juntao2; Sun, Yi1; Zhao, Tingting1; Yu, Guirui2
2019-10-01
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
Volume12Issue:5Pages:834-845
Corresponding AuthorZhang, Tao(84395611@qq.com) ; Yu, Chengqun(yucq@igsnrr.ac.cn)
AbstractAims Evapotranspiration (ET) is an important component of the terrestrial water cycle and is easily affected by external disturbances, such as climate change and grazing. Identifying ET responses to grazing is instructive for determining grazing activity and informative for understanding the water cycle. Methods This study utilized 2 years (2014 and 2017) of eddy covariance data to test how grazing regulated ET for an alpine meadow ecosystem on the Tibetan Plateau (TP) by path analysis. Important Findings Radiation dominated ET with a decision coefficient of 64-74%. The soil water content (SWC) worked as the limiting factor in the fenced site. However, in the grazing site, the limiting factor was the vapor pressure deficit (VPD). Grazing had large effects on ET because it greatly affected the water conditions. The SWC and VPD were enhanced by 14.63% and 4.36% in the grazing site, respectively. Therefore, sufficient water was supplied to ET, especially during drought, and strengthened the transpiration pull. As a result, a favorable micrometeorological environment was created for ET. Grazing shifted the limiting factor of ET from the SWC to VPD, which weakened the limiting effect of the water conditions on ET and advanced the ET peak time. In addition, grazing altered the compositions of ET by changing the community structure, which directly resulted in an increased ET. In summary, grazing enhanced ET through altering the community structure and micrometeorological environments. The findings of this study further improve our understanding of the driving mechanisms of grazing on ET and will improve our predictions for the global water cycle.
Keywordgrazing evapotranspiration environmental factors alpine meadow path analysis
DOI10.1093/jpe/rtz021
WOS KeywordGAP FILLING STRATEGIES ; SURFACE-ENERGY FLUXES ; WATER-USE EFFICIENCY ; CLIMATE-CHANGE ; INNER-MONGOLIA ; SOIL-WATER ; CARBON FLUXES ; LAND-SURFACE ; NAGQU-COUNTY ; ECOSYSTEM
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31600362] ; National Natural Science Foundation of China[31500360] ; National Natural Science Foundation of China[41725003] ; National Natural Science Foundation of China[41571195] ; China Postdoctoral Science Foundation[2018M631819] ; National Key Research and Development Project of China[2016YFC0502001] ; Science and Technology Project of State Grid Corporation of China[SGxzzzlwzhbGCJS1700095] ; National Key R&D Program of China[2017YFA0604801]
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation ; National Key Research and Development Project of China ; Science and Technology Project of State Grid Corporation of China ; National Key R&D Program of China
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology
WOS SubjectPlant Sciences ; Ecology
WOS IDWOS:000491991000005
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/129677
Collection生态系统网络观测与模拟院重点实验室_生态系统综合研究中心
Corresponding AuthorZhang, Tao; Yu, Chengqun
Affiliation1.Shenyang Agr Univ, Coll Agron, 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.Peking Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
An, Tingting,Xu, Mingjie,Zhang, Tao,et al. Grazing alters environmental control mechanisms of evapotranspiration in an alpine meadow of the Tibetan Plateau[J]. JOURNAL OF PLANT ECOLOGY,2019,12(5):834-845.
APA An, Tingting.,Xu, Mingjie.,Zhang, Tao.,Yu, Chengqun.,Li, Yingge.,...&Yu, Guirui.(2019).Grazing alters environmental control mechanisms of evapotranspiration in an alpine meadow of the Tibetan Plateau.JOURNAL OF PLANT ECOLOGY,12(5),834-845.
MLA An, Tingting,et al."Grazing alters environmental control mechanisms of evapotranspiration in an alpine meadow of the Tibetan Plateau".JOURNAL OF PLANT ECOLOGY 12.5(2019):834-845.
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