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dc.contributor.authorMacey, M. C.
dc.contributor.authorFox-Powell, M.
dc.contributor.authorRamkissoon, N. K.
dc.contributor.authorStephens, B. P.
dc.contributor.authorBarton, T.
dc.contributor.authorSchwenzer, S. P.
dc.contributor.authorPearson, V. K.
dc.contributor.authorCousins, C. R.
dc.contributor.authorOlsson-Francis, K.
dc.identifier.citationMacey , M C , Fox-Powell , M , Ramkissoon , N K , Stephens , B P , Barton , T , Schwenzer , S P , Pearson , V K , Cousins , C R & Olsson-Francis , K 2020 , ' The identification of sulfide oxidation as a potential metabolism driving primary production on late Noachian Mars ' , Scientific Reports , vol. 10 , 10941 .
dc.identifier.otherPURE: 269159506
dc.identifier.otherPURE UUID: 44b21f82-67c6-46d8-ab14-d5ad680a41eb
dc.identifier.otherScopus: 85087359448
dc.identifier.otherPubMed: 32616785
dc.identifier.otherORCID: /0000-0002-3954-8079/work/77525130
dc.identifier.otherWOS: 000550002500049
dc.descriptionAuthors acknowledge funding from the Science and Technology Facilities Council from the Grant ST/P000657/1. We would also like to acknowledge funding from a Leverhulme Trust Research Project Grant (RPG-2016-153) and thank the Polar Continental Shelf Program (Natural Resources Canada) for logistical field support in Nunavut.en
dc.description.abstractThe transition of the martian climate from the wet Noachian era to the dry Hesperian (4.1–3.0 Gya) likely resulted in saline surface waters that were rich in sulfur species. Terrestrial analogue environments that possess a similar chemistry to these proposed waters can be used to develop an understanding of the diversity of microorganisms that could have persisted on Mars under such conditions. Here, we report on the chemistry and microbial community of the highly reducing sediment of Colour Peak springs, a sulfidic and saline spring system located within the Canadian High Arctic. DNA and cDNA 16S rRNA gene profiling demonstrated that the microbial community was dominated by sulfur oxidising bacteria, suggesting that primary production in the sediment was driven by chemolithoautotrophic sulfur oxidation. It is possible that the sulfur oxidising bacteria also supported the persistence of the additional taxa. Gibbs energy values calculated for the brines, based on the chemistry of Gale crater, suggested that the oxidation of reduced sulfur species was an energetically viable metabolism for life on early Mars.
dc.relation.ispartofScientific Reportsen
dc.rightsCopyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectQB Astronomyen
dc.subjectQR Microbiologyen
dc.titleThe identification of sulfide oxidation as a potential metabolism driving primary production on late Noachian Marsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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