文献类型：期刊文献

英文题名：yy Drought-induced reduction in methane fluxes and its hydrothermal sensitivity in alpine peatland

作者：Wu, Haidong[1,2,3] Yan, Liang[1,2,3] Li, Yong[1,2,3] Zhang, Kerou[1,2,3] Hao, Yanbin[4] Wang, Jinzhi[1,2,3] Zhang, Xiaodong[1,2,3] Yan, Zhongqing[1,2,3] Zhang, Yuan[4] Kang, Xiaoming[1,2,3]

第一作者：Wu, Haidong

通信作者：Kang, XM[1];Kang, XM[2];Kang, XM[3]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China;[2]Beijing Key Lab Wetland Serv & Restorat, Beijing, Peoples R China;[3]Sichuan Zoige Wetland Ecosyst Res Stn, Tibetan Autonomous Prefe, Peoples R China;[4]Univ Chinese Acad Sci, Beijing, Peoples R China

年份：2020

卷号：8

外文期刊名：PEERJ

收录：;Scopus(收录号：2-s2.0-85083590021);WOS:【SCI-EXPANDED(收录号:WOS:000523314500006)】；

基金：This work was supported by the National Nonprofit Institute Research Grant (CAFYBB2017QB009), the National Key Research and Development Program of China (Grant No. 2016YFC0501804), and the National Natural Science Foundation of China (Grant No. 41701113, 41877421, 31770511). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

外文关键词：CH4 fluxes; Alpine peatland; Extreme drought; Hydrothermal sensitivity

摘要：Accurate estimation of CH4 fluxes in alpine peatland of the Qinghai-Tibetan Plateau under extreme drought is vital for understanding the global carbon cycle and predicting future climate change. However, studies on the impacts of extreme drought on peatland CH4 fluxes are limited. To study the effects of extreme drought on CH4 fluxes of the Zoige alpine peatland ecosystem, the CH4 fluxes during both extreme drought treatment (D) and control treatment (CK) were monitored using a static enclosed chamber in a control platform of extreme drought. The results showed that extreme drought significantly decreased CH4 fluxes in the Zoige alpine peatland by 31.54% (P < 0 :05). Extreme drought significantly reduced the soil water content (SWC) (P < 0 :05), but had no significant effect on soil temperature (Ts). Under extreme drought and control treatments, there was a significant negative correlation between CH4 fluxes and environmental factors (Ts and SWC), except Ts, at a depth of 5cm (P < 0 :05). Extreme drought reduced the correlation between CH4 fluxes and environmental factors and significantly weakened the sensitivity of CH4 fluxes to SWC (P < 0:01). Moreover, it was found that the correlation between subsoil (20 cm) environmental factors and CH4 fluxes was higher than with the topsoil (5, 10 cm) environmental factors under the control and extreme drought treatments. These results provide a better understanding of the extreme drought effects on CH4 fluxes of alpine peatland, and their hydrothermal impact factors, which provides a reliable reference for peatland protection and management.