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| Warming effects on methane fluxes differ between two alpine grasslands with contrasting soil water status | |
Li, Fei1; Yang, Guibiao1; Peng, Yunfeng; Wang, Guanqin1; Qin, Shuqi1; Song, Yutong1; Fang, Kai1; Wang, Jun1; Yu, Jianchun1; Liu, Li1; Zhang, Dianye1; Chen, Kelong2; Zhou, Guoying3,4; Yang, Yuanhe1
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| 2020 | |
| 发表期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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| ISSN | 0168-1923 |
| 卷号 | 290 |
| 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. |
| 关键词 | Alpine ecosystems Carbon cycle Carbon-climate feedback Climate warming Methane emission Methane uptake |
| 学科领域 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| DOI | 10.1016/j.agrformet.2020.107988 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 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 |
| WOS记录号 | WOS:000540172000002 |
| 出版者 | ELSEVIER |
| 文献子类 | Article |
| 出版地 | AMSTERDAM |
| EISSN | 1873-2240 |
| 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 |
| 作者邮箱 | yhyang@ibcas.ac.cn |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | 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.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qinghai Normal Univ, Sch Geog Sci, Xining 810008, Peoples R China 4.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China 5.Chinese Acad Sci, Key Lab Tibetan Med Res, Xining 810008, 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). |
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| 1-s2.0-S016819232030（6707KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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