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Warming effects on methane fluxes differ between two alpine grasslands with contrasting soil water status

文献类型：期刊论文

作者Li, Fei5; Yang, Guibiao5; Peng, Yunfeng; Wang, Guanqin5; Qin, Shuqi5; Song, Yutong5; Fang, Kai5; Wang, Jun5; Yu, Jianchun5; Liu, Li5
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2020
卷号290
关键词Alpine ecosystems Carbon cycle Carbon-climate feedback Climate warming Methane emission Methane uptake
ISSN号0168-1923
DOI10.1016/j.agrformet.2020.107988
文献子类Article
英文摘要Soil moisture plays a vital role in regulating the direction and magnitude of methane (CH4) fluxes. However, it remains unclear whether the responses of CH4 fluxes to climate warming exhibit difference between dry and moist ecosystems. Based on standardized manipulative experiments (i.e., consistent experimental design and measurement protocols), here we explored warming effects on growing season CH4 fluxes in two alpine grasslands with contrasting water status on the Tibetan Plateau. We observed that experimental warming enhanced CH4 uptake in the relatively arid alpine steppe, but had no significant effects on CH4 emission in the moist swamp meadow. The distinct responses of CH4 fluxes were associated with the different warming effects on biotic and abiotic factors related to CH4 oxidation and production processes. Warming decreased soil water-filled pore space (WFPS) and increased the pmoA gene abundance and CH4 oxidation potential in the alpine steppe, which together led to a significant increase in CH4 uptake at this alpine steppe site. However, warming-induced enhancement in CH4 oxidation potential might be counteracted by the simultaneously increased CH4 production potential in the swamp meadow, which could then result in insignificant warming effects on CH4 emission at this swamp meadow site. Based on a meta-analysis of warming effects on CH4 fluxes across the entire Tibetan Plateau, we found that the entire alpine grasslands could absorb an extra 0.042 Tg CH4 (1 Tg = 10(12) g) per growing season if soil temperature increased by 1 degrees C. These findings demonstrate that warming effects on CH4 fluxes differ between two alpine grasslands with contrasting moisture conditions and the entire alpine grasslands may not trigger a positive CH4 feedback to climate system with moderate warming.
学科主题Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
出版地AMSTERDAM
电子版国际标准刊号1873-2240
WOS关键词GREENHOUSE-GAS EMISSIONS ; PERMAFROST THAW ; NITROGEN-FERTILIZATION ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; TIBETAN PLATEAU ; GHG FLUX ; TEMPERATURE ; PEAT ; CH4
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000540172000002
出版者ELSEVIER
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31825006, 31988102, 91837312] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program [2019QZKK0106, 2019QZKK0302] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSWSMC049] ; China Scholarship CouncilChina Scholarship Council
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21720]  
专题植被与环境变化国家重点实验室
作者单位1.Qinghai Normal Univ, Sch Geog Sci, Xining 810008, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China
3.Chinese Acad Sci, Key Lab Tibetan Med Res, Xining 810008, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Li, Fei,Yang, Guibiao,Peng, Yunfeng,et al. Warming effects on methane fluxes differ between two alpine grasslands with contrasting soil water status[J]. AGRICULTURAL AND FOREST METEOROLOGY,2020,290.
APA Li, Fei.,Yang, Guibiao.,Peng, Yunfeng.,Wang, Guanqin.,Qin, Shuqi.,...&Yang, Yuanhe.(2020).Warming effects on methane fluxes differ between two alpine grasslands with contrasting soil water status.AGRICULTURAL AND FOREST METEOROLOGY,290.
MLA Li, Fei,et al."Warming effects on methane fluxes differ between two alpine grasslands with contrasting soil water status".AGRICULTURAL AND FOREST METEOROLOGY 290(2020).

入库方式： OAI收割

来源：植物研究所

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