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The compensation effects of post-drought regrowth on earlier drought loss across the tibetan plateau grasslands

文献类型：期刊论文

作者Chen, Ning2,3; Zhang, Yangjian2,4,5; Zu, Jiaxing6,7; Zhu, Juntao2; Zhang, Tao8; Huang, Ke2; Cong, Nan2; Wang, Zhipeng2,3; Li, Junxiang9; Zheng, Zhoutao2
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2020-02-15
卷号281页码:20
关键词Alpine grasslands Compensate Drought NEP NPP Regrowth
ISSN号0168-1923
DOI10.1016/j.agrformet.2019.107822
通讯作者Zhang, Yangjian(zhangyj@igsnrr.ac.cn) ; Tian, Yuan(tiany.13s@igsnrr.ac.cn)
英文摘要One-third of the global fossil fuel CO2 emissions is offset by carbon uptake of terrestrial ecosystems, while its strength is highly sensitive to drought events. It is predicted that frequencies of drought events would increase under a changing climate, which entails improving our understanding about their effects. Here, we combined direct observations at plot (experiment sites) and landscape (eddy-covariance, EC) scales with remote sensing observations at a regional scale, and evaluated the linkages between ecological resistance (summer drought loss, SDL) and resilience (post-drought regrowth, PDR). The study was conducted for an alpine grassland ecosystem on the Tibetan Plateau, which is highly vulnerable to climate changes. The results showed that alpine grasslands possess low resistance to drought. A summer drought of 2015 reduced net primary productivity (NPP) or net ecosystem productivity (NEP) by 25.4 g C m (- 2), 48.6 g C m (- 2) and 14.2 Tg C at the plot, landscape and regional scale relative to the baseline, respectively. In another dry summer of 2017, NEP was 11.0 g C m (- 2) and 7.5 g C m (- 2) lower than the baseline at the landscape and plot scale, respectively. To be noted, NEP or NPP completely recovered and exceeded the baseline due to rewetting induced PDR, compensating for the prior SDL to a certain extent. In 2015, the SDL of NEP or NPP was compensated by 39.0%, 17.3% and 10.6% due to the PDR effects at the plot, landscape and regional scale, respectively. The PDR of NEP in 2017 offset 23.6% and 70.7% of the prior SDL at the landscape and plot scale, respectively. Overall, these results demonstrated that weakened ecosystem function due to drought (e.g., low resistance) does not preclude rapid ecosystem recovery and regrowth (e.g., high resilience), which compensates for the prior loss to a certain degree.
WOS关键词ECOSYSTEM CARBON FLUXES ; INDUCED TREE MORTALITY ; ALPINE MEADOW ; PLANT-PRODUCTION ; CLIMATE-CHANGE ; VEGETATION ACTIVITY ; PRECIPITATION ; RESPIRATION ; TEMPERATURE ; RESISTANCE
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA20050102] ; National Natural Science Foundation of China[41725003] ; National Natural Science Foundation of China[41571195] ; National Natural Science Foundation of China[31500360] ; National Natural Science Foundation of China[31600362] ; National Natural Science Foundation of China[41801083]
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000525808600008
出版者ELSEVIER
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/133944]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Yangjian; Tian, Yuan
作者单位1.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, 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.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
6.Nanning Normal Univ, Key Lab Environm Change & Resources Use Beibu Gul, Minist Educ, Nanning, Peoples R China
7.Nanning Normal Univ, Guangxi Key Lab Earth Surface Proc & Intelligent, Nanning, Peoples R China
8.Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China
9.Peking Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Ning,Zhang, Yangjian,Zu, Jiaxing,et al. The compensation effects of post-drought regrowth on earlier drought loss across the tibetan plateau grasslands[J]. AGRICULTURAL AND FOREST METEOROLOGY,2020,281:20.
APA Chen, Ning.,Zhang, Yangjian.,Zu, Jiaxing.,Zhu, Juntao.,Zhang, Tao.,...&Chen, Yao.(2020).The compensation effects of post-drought regrowth on earlier drought loss across the tibetan plateau grasslands.AGRICULTURAL AND FOREST METEOROLOGY,281,20.
MLA Chen, Ning,et al."The compensation effects of post-drought regrowth on earlier drought loss across the tibetan plateau grasslands".AGRICULTURAL AND FOREST METEOROLOGY 281(2020):20.

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来源：地理科学与资源研究所

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