Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem
BACKGROUND: The sulfur cycle encompasses a series of complex aerobic and anaerobic transformations of S-containing molecules and plays a fundamental role in cellular and ecosystem-level processes, influencing biological carbon transfers and other biogeochemical cycles. Despite their importance, the...
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ftpubmed:oai:pubmedcentral.nih.gov:7887784 2023-05-15T15:13:22+02:00 Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem Vigneron, Adrien Cruaud, Perrine Culley, Alexander I. Couture, Raoul-Marie Lovejoy, Connie Vincent, Warwick F. 2021-02-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7887784/ http://www.ncbi.nlm.nih.gov/pubmed/33593438 https://doi.org/10.1186/s40168-021-00999-x en eng BioMed Central http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7887784/ http://www.ncbi.nlm.nih.gov/pubmed/33593438 http://dx.doi.org/10.1186/s40168-021-00999-x © The Author(s) 2021 Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. CC0 PDM CC-BY Microbiome Research Text 2021 ftpubmed https://doi.org/10.1186/s40168-021-00999-x 2021-02-28T01:29:38Z BACKGROUND: The sulfur cycle encompasses a series of complex aerobic and anaerobic transformations of S-containing molecules and plays a fundamental role in cellular and ecosystem-level processes, influencing biological carbon transfers and other biogeochemical cycles. Despite their importance, the microbial communities and metabolic pathways involved in these transformations remain poorly understood, especially for inorganic sulfur compounds of intermediate oxidation states (thiosulfate, tetrathionate, sulfite, polysulfides). Isolated and highly stratified, the extreme geochemical and environmental features of meromictic ice-capped Lake A, in the Canadian High Arctic, provided an ideal model ecosystem to resolve the distribution and metabolism of aquatic sulfur cycling microorganisms along redox and salinity gradients. RESULTS: Applying complementary molecular approaches, we identified sharply contrasting microbial communities and metabolic potentials among the markedly distinct water layers of Lake A, with similarities to diverse fresh, brackish and saline water microbiomes. Sulfur cycling genes were abundant at all depths and covaried with bacterial abundance. Genes for oxidative processes occurred in samples from the oxic freshwater layers, reductive reactions in the anoxic and sulfidic bottom waters and genes for both transformations at the chemocline. Up to 154 different genomic bins with potential for sulfur transformation were recovered, revealing a panoply of taxonomically diverse microorganisms with complex metabolic pathways for biogeochemical sulfur reactions. Genes for the utilization of sulfur cycle intermediates were widespread throughout the water column, co-occurring with sulfate reduction or sulfide oxidation pathways. The genomic bin composition suggested that in addition to chemical oxidation, these intermediate sulfur compounds were likely produced by the predominant sulfur chemo- and photo-oxidisers at the chemocline and by diverse microbial degraders of organic sulfur molecules. ... Text Arctic PubMed Central (PMC) Arctic Microbiome 9 1 |
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Research Vigneron, Adrien Cruaud, Perrine Culley, Alexander I. Couture, Raoul-Marie Lovejoy, Connie Vincent, Warwick F. Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
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BACKGROUND: The sulfur cycle encompasses a series of complex aerobic and anaerobic transformations of S-containing molecules and plays a fundamental role in cellular and ecosystem-level processes, influencing biological carbon transfers and other biogeochemical cycles. Despite their importance, the microbial communities and metabolic pathways involved in these transformations remain poorly understood, especially for inorganic sulfur compounds of intermediate oxidation states (thiosulfate, tetrathionate, sulfite, polysulfides). Isolated and highly stratified, the extreme geochemical and environmental features of meromictic ice-capped Lake A, in the Canadian High Arctic, provided an ideal model ecosystem to resolve the distribution and metabolism of aquatic sulfur cycling microorganisms along redox and salinity gradients. RESULTS: Applying complementary molecular approaches, we identified sharply contrasting microbial communities and metabolic potentials among the markedly distinct water layers of Lake A, with similarities to diverse fresh, brackish and saline water microbiomes. Sulfur cycling genes were abundant at all depths and covaried with bacterial abundance. Genes for oxidative processes occurred in samples from the oxic freshwater layers, reductive reactions in the anoxic and sulfidic bottom waters and genes for both transformations at the chemocline. Up to 154 different genomic bins with potential for sulfur transformation were recovered, revealing a panoply of taxonomically diverse microorganisms with complex metabolic pathways for biogeochemical sulfur reactions. Genes for the utilization of sulfur cycle intermediates were widespread throughout the water column, co-occurring with sulfate reduction or sulfide oxidation pathways. The genomic bin composition suggested that in addition to chemical oxidation, these intermediate sulfur compounds were likely produced by the predominant sulfur chemo- and photo-oxidisers at the chemocline and by diverse microbial degraders of organic sulfur molecules. ... |
format |
Text |
author |
Vigneron, Adrien Cruaud, Perrine Culley, Alexander I. Couture, Raoul-Marie Lovejoy, Connie Vincent, Warwick F. |
author_facet |
Vigneron, Adrien Cruaud, Perrine Culley, Alexander I. Couture, Raoul-Marie Lovejoy, Connie Vincent, Warwick F. |
author_sort |
Vigneron, Adrien |
title |
Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
title_short |
Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
title_full |
Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
title_fullStr |
Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
title_full_unstemmed |
Genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
title_sort |
genomic evidence for sulfur intermediates as new biogeochemical hubs in a model aquatic microbial ecosystem |
publisher |
BioMed Central |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7887784/ http://www.ncbi.nlm.nih.gov/pubmed/33593438 https://doi.org/10.1186/s40168-021-00999-x |
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Arctic |
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Arctic |
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Arctic |
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Arctic |
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Microbiome |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7887784/ http://www.ncbi.nlm.nih.gov/pubmed/33593438 http://dx.doi.org/10.1186/s40168-021-00999-x |
op_rights |
© The Author(s) 2021 Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
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CC0 PDM CC-BY |
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https://doi.org/10.1186/s40168-021-00999-x |
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Microbiome |
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