Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review
Anaerobic oxidation of methane (AOM) is one of the major processes of oxidizing methane in marine sediments. Up to now, extensive studies about AOM coupled to sulfate reduction have been conducted because SO<sub>4</sub><sup>2−</sup> is the most abundant electron acceptor in s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/8/875 |
| _version_ | 1797523365547737088 |
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| author | Hailin Yang Shan Yu Hailong Lu |
| author_facet | Hailin Yang Shan Yu Hailong Lu |
| author_sort | Hailin Yang |
| collection | DOAJ |
| description | Anaerobic oxidation of methane (AOM) is one of the major processes of oxidizing methane in marine sediments. Up to now, extensive studies about AOM coupled to sulfate reduction have been conducted because SO<sub>4</sub><sup>2−</sup> is the most abundant electron acceptor in seawater and shallow marine sediments. However, other terminal electron acceptors of AOM, such as NO<sub>3</sub><sup>−</sup>, NO<sub>2</sub><sup>−</sup>, Mn(IV), Fe(III), are more energetically favorable than SO<sub>4</sub><sup>2−</sup>. Iron oxides, part of the major components in deep marine sediments, might play a significant role as an electron acceptor in the AOM process, mainly below the sulfate–methane interface, mediated by physiologically related microorganisms. Iron-coupled AOM is possibly the dominant non-sulfate-dependent AOM process to consume methane in marine ecosystems. In this review, the conditions for iron-coupled AOM are summarized, and the forms of iron oxides as electron acceptors and the microbial mechanisms are discussed. |
| first_indexed | 2024-03-10T08:40:57Z |
| format | Article |
| id | doaj.art-624b0b313b1c4ce997a5d541633c91bb |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T08:40:57Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-624b0b313b1c4ce997a5d541633c91bb2023-11-22T08:15:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-08-019887510.3390/jmse9080875Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A ReviewHailin Yang0Shan Yu1Hailong Lu2Beijing International Center for Gas Hydrate, School of Earth and Space Sciences, Peking University, Beijing 100871, ChinaBeijing International Center for Gas Hydrate, School of Earth and Space Sciences, Peking University, Beijing 100871, ChinaBeijing International Center for Gas Hydrate, School of Earth and Space Sciences, Peking University, Beijing 100871, ChinaAnaerobic oxidation of methane (AOM) is one of the major processes of oxidizing methane in marine sediments. Up to now, extensive studies about AOM coupled to sulfate reduction have been conducted because SO<sub>4</sub><sup>2−</sup> is the most abundant electron acceptor in seawater and shallow marine sediments. However, other terminal electron acceptors of AOM, such as NO<sub>3</sub><sup>−</sup>, NO<sub>2</sub><sup>−</sup>, Mn(IV), Fe(III), are more energetically favorable than SO<sub>4</sub><sup>2−</sup>. Iron oxides, part of the major components in deep marine sediments, might play a significant role as an electron acceptor in the AOM process, mainly below the sulfate–methane interface, mediated by physiologically related microorganisms. Iron-coupled AOM is possibly the dominant non-sulfate-dependent AOM process to consume methane in marine ecosystems. In this review, the conditions for iron-coupled AOM are summarized, and the forms of iron oxides as electron acceptors and the microbial mechanisms are discussed.https://www.mdpi.com/2077-1312/9/8/875anaerobic oxidation of methaneiron reductionmicrobial mechanismmarine sedimentscarbon sink |
| spellingShingle | Hailin Yang Shan Yu Hailong Lu Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review Journal of Marine Science and Engineering anaerobic oxidation of methane iron reduction microbial mechanism marine sediments carbon sink |
| title | Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review |
| title_full | Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review |
| title_fullStr | Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review |
| title_full_unstemmed | Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review |
| title_short | Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review |
| title_sort | iron coupled anaerobic oxidation of methane in marine sediments a review |
| topic | anaerobic oxidation of methane iron reduction microbial mechanism marine sediments carbon sink |
| url | https://www.mdpi.com/2077-1312/9/8/875 |
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