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Article: Photoferrotrophy, deposition of banded iron formations, and methane production in Archean oceans

TitlePhotoferrotrophy, deposition of banded iron formations, and methane production in Archean oceans
Authors
Issue Date2019
PublisherAmerican Association for the Advancement of Science: Science Advances. The Journal's web site is located at http://www.scienceadvances.org/
Citation
Science Advances, 2019, v. 5 n. 11, article no. eaav2869 How to Cite?
AbstractBanded iron formation (BIF) deposition was the likely result of oxidation of ferrous iron in seawater by either oxygenic photosynthesis or iron-dependent anoxygenic photosynthesis—photoferrotrophy. BIF deposition, however, remains enigmatic because the photosynthetic biomass produced during iron oxidation is conspicuously absent from BIFs. We have addressed this enigma through experiments with photosynthetic bacteria and modeling of biogeochemical cycling in the Archean oceans. Our experiments reveal that, in the presence of silica, photoferrotroph cell surfaces repel iron (oxyhydr)oxides. In silica-rich Precambrian seawater, this repulsion would separate biomass from ferric iron and would lead to large-scale deposition of BIFs lean in organic matter. Excess biomass not deposited with BIF would have deposited in coastal sediments, formed organic-rich shales, and fueled microbial methanogenesis. As a result, the deposition of BIFs by photoferrotrophs would have contributed fluxes of methane to the atmosphere and thus helped to stabilize Earth’s climate under a dim early Sun.
Persistent Identifierhttp://hdl.handle.net/10722/290146
ISSN
2020 Impact Factor: 14.136
2020 SCImago Journal Rankings: 5.928
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorThompson, KJ-
dc.contributor.authorKenward, PA-
dc.contributor.authorBauer, KW-
dc.contributor.authorWarchola, T-
dc.contributor.authorGauger, T-
dc.contributor.authorMartinez, R-
dc.contributor.authorSimister, RL-
dc.contributor.authorMichiels, CC-
dc.contributor.authorLlirós, M-
dc.contributor.authorReinhard, CT-
dc.contributor.authorKappler, A-
dc.contributor.authorKonhauser, KO-
dc.contributor.authorCrowe, SA-
dc.date.accessioned2020-10-22T08:22:44Z-
dc.date.available2020-10-22T08:22:44Z-
dc.date.issued2019-
dc.identifier.citationScience Advances, 2019, v. 5 n. 11, article no. eaav2869-
dc.identifier.issn2375-2548-
dc.identifier.urihttp://hdl.handle.net/10722/290146-
dc.description.abstractBanded iron formation (BIF) deposition was the likely result of oxidation of ferrous iron in seawater by either oxygenic photosynthesis or iron-dependent anoxygenic photosynthesis—photoferrotrophy. BIF deposition, however, remains enigmatic because the photosynthetic biomass produced during iron oxidation is conspicuously absent from BIFs. We have addressed this enigma through experiments with photosynthetic bacteria and modeling of biogeochemical cycling in the Archean oceans. Our experiments reveal that, in the presence of silica, photoferrotroph cell surfaces repel iron (oxyhydr)oxides. In silica-rich Precambrian seawater, this repulsion would separate biomass from ferric iron and would lead to large-scale deposition of BIFs lean in organic matter. Excess biomass not deposited with BIF would have deposited in coastal sediments, formed organic-rich shales, and fueled microbial methanogenesis. As a result, the deposition of BIFs by photoferrotrophs would have contributed fluxes of methane to the atmosphere and thus helped to stabilize Earth’s climate under a dim early Sun.-
dc.languageeng-
dc.publisherAmerican Association for the Advancement of Science: Science Advances. The Journal's web site is located at http://www.scienceadvances.org/-
dc.relation.ispartofScience Advances-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titlePhotoferrotrophy, deposition of banded iron formations, and methane production in Archean oceans-
dc.typeArticle-
dc.identifier.emailBauer, KW: bauerkoh@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1126/sciadv.aav2869-
dc.identifier.pmid31807693-
dc.identifier.pmcidPMC6881150-
dc.identifier.scopuseid_2-s2.0-85076300840-
dc.identifier.hkuros316143-
dc.identifier.volume5-
dc.identifier.issue11-
dc.identifier.spagearticle no. eaav2869-
dc.identifier.epagearticle no. eaav2869-
dc.identifier.isiWOS:000499736100003-
dc.publisher.placeUnited States-
dc.identifier.issnl2375-2548-

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