Biotic effects dominate the inter-annual variability in ecosystem carbon exchange in a Tibetan alpine meadow

作     者：Mingjie Xu Yi Sun Tao Zhang Yangjian Zhang Juntao Zhu Yongtao He Liwei Wang Guirui Yu Mingjie Xu;Yi Sun;Tao Zhang;Yangjian Zhang;Juntao Zhu;Yongtao He;Liwei Wang;Guirui Yu

作者机构：College of AgronomyShenyang Agricultural UniversityShenyang 110866China Huludao Meteorological Bureau of Liaoning ProvinceHuludao 125080China Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Center for Excellence in Tibetan Plateau Earth SciencesChinese Academy of SciencesBeijing 100101China College of Resources and EnvironmentUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2022年第15卷第5期

页      面：882-896页

核心收录：

学科分类：090503[农学-草业科学] 0909[农学-草学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 

基　　金：the National Natural Science Foundation of China(41725003,31600362 and32061143037) a ChinaPostdoctoral Science Foundation funded project(2021M692230 and 2018M631819) the National Key Research and DevelopmentProgram of China(2017YFA0604801)and the Science and technology research project of Liaoning Provincial Department of Education(LSNQN201720) 

主　　题：biotic controls climatic controls carbon flux productivity grassland 

摘      要：The alpine meadow ecosystem in Tibet is fragile and sensitive,and its carbon sink function with respect to climate change has become a matter of widespread ***,this study aims to clarify the inter-annual variations(IAVs)in the carbon fluxes in an alpine meadow and to further quantify the contributions of the driving factors to the *** on 7 years of flux data(2012-2018)and the corresponding climatic and biotic data,a set of look-up tables was used to separate and quantify the IAV ***,linear perturbation analyses were employed to quantify the contributions of each key *** 2012-2018,the net ecosystem productivity(NEP),gross primary productivity(GPP)and ecosystem respiration(Re)of this alpine meadow were 3.31±26.90,210.18±48.35 and 206.88±28.45 g C m^(-2) y^(-1),respectively,which indicated relatively large *** the contributions of climatic and biotic effects were distinguished and quantified,the dominant effects of biotic factors ***,negative interactions between climatic and biotic effects were *** the climatic factors,only soil water content contributed relatively more to the IAVs and played a role in regulating the interactions between climatic and biotic *** results suggest that biotic effects must be carefully considered to reduce the uncertainties associated with future carbon flux estimates.