The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue

Abstract In the ferruginous and anoxic early Earth oceans, photoferrotrophy drove most of the biological production before the advent of oxygenic photosynthesis, but its association with ferric iron (Fe3+) dependent anaerobic methane (CH4) oxidation (AOM) has been poorly investigated. We studied AOM...

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Autores principales:	Fleur A. E. Roland, Alberto V. Borges, François Darchambeau, Marc Llirós, Jean-Pierre Descy, Cédric Morana
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7f3b2d80619b4d98b20438221cf2cb49
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spelling	oai:doaj.org-article:7f3b2d80619b4d98b20438221cf2cb492021-12-02T14:12:09ZThe possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue10.1038/s41598-021-81210-x2045-2322https://doaj.org/article/7f3b2d80619b4d98b20438221cf2cb492021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81210-xhttps://doaj.org/toc/2045-2322Abstract In the ferruginous and anoxic early Earth oceans, photoferrotrophy drove most of the biological production before the advent of oxygenic photosynthesis, but its association with ferric iron (Fe3+) dependent anaerobic methane (CH4) oxidation (AOM) has been poorly investigated. We studied AOM in Kabuno Bay, a modern analogue to the Archean Ocean (anoxic bottom waters and dissolved Fe concentrations > 600 µmol L−1). Aerobic and anaerobic CH4 oxidation rates up to 0.12 ± 0.03 and 51 ± 1 µmol L−1 d−1, respectively, were put in evidence. In the Fe oxidation–reduction zone, we observed high concentration of Bacteriochlorophyll e (biomarker of the anoxygenic photoautotrophs), which co-occurred with the maximum CH4 oxidation peaks, and a high abundance of Candidatus Methanoperedens, which can couple AOM to Fe3+ reduction. In addition, comparison of measured CH4 oxidation rates with electron acceptor fluxes suggest that AOM could mainly rely on Fe3+ produced by photoferrotrophs. Further experiments specifically targeted to investigate the interactions between photoferrotrophs and AOM would be of considerable interest. Indeed, ferric Fe3+-driven AOM has been poorly envisaged as a possible metabolic process in the Archean ocean, but this can potentially change the conceptualization and modelling of metabolic and geochemical processes controlling climate conditions in the Early Earth.Fleur A. E. RolandAlberto V. BorgesFrançois DarchambeauMarc LlirósJean-Pierre DescyCédric MoranaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fleur A. E. Roland Alberto V. Borges François Darchambeau Marc Llirós Jean-Pierre Descy Cédric Morana The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
description	Abstract In the ferruginous and anoxic early Earth oceans, photoferrotrophy drove most of the biological production before the advent of oxygenic photosynthesis, but its association with ferric iron (Fe3+) dependent anaerobic methane (CH4) oxidation (AOM) has been poorly investigated. We studied AOM in Kabuno Bay, a modern analogue to the Archean Ocean (anoxic bottom waters and dissolved Fe concentrations > 600 µmol L−1). Aerobic and anaerobic CH4 oxidation rates up to 0.12 ± 0.03 and 51 ± 1 µmol L−1 d−1, respectively, were put in evidence. In the Fe oxidation–reduction zone, we observed high concentration of Bacteriochlorophyll e (biomarker of the anoxygenic photoautotrophs), which co-occurred with the maximum CH4 oxidation peaks, and a high abundance of Candidatus Methanoperedens, which can couple AOM to Fe3+ reduction. In addition, comparison of measured CH4 oxidation rates with electron acceptor fluxes suggest that AOM could mainly rely on Fe3+ produced by photoferrotrophs. Further experiments specifically targeted to investigate the interactions between photoferrotrophs and AOM would be of considerable interest. Indeed, ferric Fe3+-driven AOM has been poorly envisaged as a possible metabolic process in the Archean ocean, but this can potentially change the conceptualization and modelling of metabolic and geochemical processes controlling climate conditions in the Early Earth.
format	article
author	Fleur A. E. Roland Alberto V. Borges François Darchambeau Marc Llirós Jean-Pierre Descy Cédric Morana
author_facet	Fleur A. E. Roland Alberto V. Borges François Darchambeau Marc Llirós Jean-Pierre Descy Cédric Morana
author_sort	Fleur A. E. Roland
title	The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
title_short	The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
title_full	The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
title_fullStr	The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
title_full_unstemmed	The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue
title_sort	possible occurrence of iron-dependent anaerobic methane oxidation in an archean ocean analogue
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7f3b2d80619b4d98b20438221cf2cb49
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The possible occurrence of iron-dependent anaerobic methane oxidation in an Archean Ocean analogue

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