The relationship between anaerobic oxidation of methane and dark carbon fixation in methane seep sediments
文献类型：期刊论文
| 作者 | Deng, Yinan1,2,4; Xie, Rui3; Guo, Qingjun4,5; Yang, Shengxiong2; Zhang, Ganglan2; Lai, Hongfei2; Liang, Qianyong2; Chen, Fang2; Cao, Jun2 |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 253页码:104965 |
| 关键词 | Methane seeps Carbon cycle Dark carbon fixation Anaerobic oxidation of methane |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2025.104965 |
| 产权排序 | 4 |
| 文献子类 | Article |
| 英文摘要 | Carbon fixation by chemoautotrophic microorganisms in the dark ocean plays a crucial role in global carbon cycling. Herein, we present data on total organic carbon (TOC), major and trace elements, terrigenous clastic indicators, and carbon isotopes from site GMGS2-16 in the South China Sea. Our results show that the organic matter content in the sulfate-methane transition zone (SMTZ) and the paleo-SMTZ is approximately twice that of background values. The delta 13C-TOC values exhibit negative shifts in both the SMTZ and paleo-SMTZ, with minimum values of -24.49 %o and - 22.96 %o, respectively, indicating a mixed source of organic matter. Based on the C/N ratio and the negative correlation between organic matter and nutrient elements, we conclude that the enrichment of organic matter at the SMTZ and paleo-SMTZ is primarily driven by in situ biological activity. Additionally, the enrichment of U, Mo element and pyrite suggests that organic carbon forms in anoxic and sulfidic sediments. Furthermore, Gammaproteobacteria are enriched in both the SMTZ and paleo-SMTZ at site GMGS2-16, highlighting their important role in dark carbon fixation (DCF) within coastal sediments. Based on these observations, we propose a mechanism for DCF driven by anaerobic oxidation of methane (AOM). In this process, substances produced by AOM, such as sulfides and bicarbonate, can be utilized by microorganisms. These specialized organisms derive energy by converting inorganic compounds, such as hydrogen sulfide, and, in turn, fix inorganic carbon into organic carbon. This study underscores the significant role of AOM in DCF. |
| URL标识 | 查看原文 |
| WOS关键词 | GAS HYDRATE ; CHEMOLITHOAUTOTROPHIC PROKARYOTES ; PELAGIC REDOXCLINE ; OXIDIZING BACTERIA ; MARINE-SEDIMENTS ; ORGANIC-MATTER ; SULFUR CYCLE ; CO2 FIXATION ; WATERS ; DIVERSITY |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001524828700001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215355]  |
| 专题 | 资源利用与环境修复重点实验室_外文论文 |
| 通讯作者 | Deng, Yinan; Guo, Qingjun |
| 作者单位 | 1.Minist Nat Resources, Guangzhou Marine Geol Survey, Key Lab Marine Mineral Resources, Guangzhou, Peoples R China; 2.Natl Engn Res Ctr Gas Hydrate Explorat & Dev, Guangzhou, Peoples R China; 3.Yunnan Univ, Inst Palaeontol, Yunnan Key Lab Earth Syst Sci, Kunming, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China; 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, Yinan,Xie, Rui,Guo, Qingjun,et al. The relationship between anaerobic oxidation of methane and dark carbon fixation in methane seep sediments[J]. GLOBAL AND PLANETARY CHANGE,2025,253:104965. |
| APA | Deng, Yinan.,Xie, Rui.,Guo, Qingjun.,Yang, Shengxiong.,Zhang, Ganglan.,...&Cao, Jun.(2025).The relationship between anaerobic oxidation of methane and dark carbon fixation in methane seep sediments.GLOBAL AND PLANETARY CHANGE,253,104965. |
| MLA | Deng, Yinan,et al."The relationship between anaerobic oxidation of methane and dark carbon fixation in methane seep sediments".GLOBAL AND PLANETARY CHANGE 253(2025):104965. |
入库方式： OAI收割
来源：地理科学与资源研究所
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