Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1715789115 |
Control on rate and pathway of anaerobic organic carbon degradation in the seabed | |
Beulig, F.1; Roy, H.1; Glombitza, C.1,2; Jorgensen, B. B.1 | |
2018-01-09 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:2页码:367-372 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; USA |
英文摘要 | The degradation of organic matter in the anoxic seabed proceeds through a complex microbial network in which the terminal steps are dominated by oxidation with sulfate or conversion into methane and CO2. The controls on pathway and rate of the degradation process in different geochemical zones remain elusive. Radiotracer techniques were used to perform measurements of sulfate reduction, methanogenesis, and acetate oxidation with unprecedented sensitivity throughout Holocene sediment columns from the Baltic Sea. We found that degradation rates transition continuously from the sulfate to the methane zone, thereby demonstrating that terminal steps do not exert feedback control on upstream hydrolytic and fermentative processes, as previously suspected. Acetate was a key intermediate for carbon mineralization in both zones. However, acetate was not directly converted into methane. Instead, an additional subterminal step converted acetate to CO2 and reducing equivalents, such as H-2, which then fed autotrophic reduction of CO2 to methane. |
英文关键词 | marine sediment organic matter mineralization sulfate reduction methanogenesis syntrophic acetate oxidation |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419686400056 |
WOS关键词 | MOLAL THERMODYNAMIC PROPERTIES ; SYNTROPHIC ACETATE OXIDATION ; SULFATE-REDUCING BACTERIA ; ANOXIC MARINE SEDIMENT ; VOLATILE FATTY-ACIDS ; METHANE PRODUCTION ; BALTIC SEA ; HYDROGEN CONCENTRATIONS ; TRANSPORT-PROPERTIES ; HIGH-PRESSURES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204913 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Aarhus Univ, Ctr Geomicrobiol, Dept Biosci, DK-8000 Aarhus C, Denmark; 2.NASA, Ames Res Ctr, Space Sci Div, Moffett Field, CA 94035 USA |
推荐引用方式 GB/T 7714 | Beulig, F.,Roy, H.,Glombitza, C.,et al. Control on rate and pathway of anaerobic organic carbon degradation in the seabed[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(2):367-372. |
APA | Beulig, F.,Roy, H.,Glombitza, C.,&Jorgensen, B. B..(2018).Control on rate and pathway of anaerobic organic carbon degradation in the seabed.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(2),367-372. |
MLA | Beulig, F.,et al."Control on rate and pathway of anaerobic organic carbon degradation in the seabed".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.2(2018):367-372. |
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