globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12077
Scopus记录号: 2-s2.0-84893756276
论文题名:
An inorganic geochemical argument for coupled anaerobic oxidation of methane and iron reduction in marine sediments
作者: Riedinger N.; Formolo M.J.; Lyons T.W.; Henkel S.; Beck A.; Kasten S.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2014
卷: 12, 期:2
起始页码: 172
结束页码: 181
语种: 英语
Scopus关键词: iron ; methane ; sulfate ; anaerobic growth ; article ; Atlantic Ocean ; metabolism ; microbiology ; oxidation reduction reaction ; sediment ; Anaerobiosis ; Atlantic Ocean ; Geologic Sediments ; Iron ; Methane ; Oxidation-Reduction ; Sulfates
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Here, we present results from sediments collected in the Argentine Basin, a non-steady state depositional marine system characterized by abundant oxidized iron within methane-rich layers due to sediment reworking followed by rapid deposition. Our comprehensive inorganic data set shows that iron reduction in these sulfate and sulfide-depleted sediments is best explained by a microbially mediated process-implicating anaerobic oxidation of methane coupled to iron reduction (Fe-AOM) as the most likely major mechanism. Although important in many modern marine environments, iron-driven AOM may not consume similar amounts of methane compared with sulfate-dependent AOM. Nevertheless, it may have broad impact on the deep biosphere and dominate both iron and methane cycling in sulfate-lean marine settings. Fe-AOM might have been particularly relevant in the Archean ocean, >2.5 billion years ago, known for its production and accumulation of iron oxides (in iron formations) in a biosphere likely replete with methane but low in sulfate. Methane at that time was a critical greenhouse gas capable of sustaining a habitable climate under relatively low solar luminosity, and relationships to iron cycling may have impacted if not dominated methane loss from the biosphere. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85162
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Earth Sciences, University of California, Riverside, CA, United States; Department of Geosciences, The University of Tulsa, Tulsa, OK, United States; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Center for Geomicrobiology, Aarhus University, Aarhus C, Denmark; MARUM - Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, Bremen, Germany; Institute of Geology and Mineralogy, University of Cologne, Cologne, Germany

Recommended Citation:
Riedinger N.,Formolo M.J.,Lyons T.W.,et al. An inorganic geochemical argument for coupled anaerobic oxidation of methane and iron reduction in marine sediments[J]. Geobiology,2014-01-01,12(2)
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