Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice
Sea ice microbial communities produce large amounts of the sulfur metabolite dimethylsulfoniopropionate (DMSP), a precursor of the climate cooling gas dimethylsulfide. Despite their importance to the polar sulfur cycle, drivers and metabolic pathways of sea ice DMSP are uncertain. Here we report the...
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ftpubmed:oai:pubmedcentral.nih.gov:6279776 2023-05-15T13:40:41+02:00 Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice Carnat, Gauthier Said-Ahmad, Ward Fripiat, François Wittek, Boris Tison, Jean-Louis Uhlig, Christiane Amrani, Alon 2018-12-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6279776/ http://www.ncbi.nlm.nih.gov/pubmed/30534604 https://doi.org/10.1038/s42003-018-0228-y en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6279776/ http://www.ncbi.nlm.nih.gov/pubmed/30534604 http://dx.doi.org/10.1038/s42003-018-0228-y © The Author(s) 2018 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 http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2018 ftpubmed https://doi.org/10.1038/s42003-018-0228-y 2018-12-16T01:27:56Z Sea ice microbial communities produce large amounts of the sulfur metabolite dimethylsulfoniopropionate (DMSP), a precursor of the climate cooling gas dimethylsulfide. Despite their importance to the polar sulfur cycle, drivers and metabolic pathways of sea ice DMSP are uncertain. Here we report the first measurements of sea ice DMSP sulfur isotopic composition (34S/32S ratio, δ34S). δ34S values in ice cores from the Ross Sea and Weddell Sea reveal considerable variability across seasons and between ice horizons (from +10.6 to +23.6‰). We discuss how the most extreme δ34S values observed could be related to unique DMSP cycling in the seasonally extreme physiochemical conditions of isolated brine inclusions in winter-spring. Using cell cultures, we show that part of the DMSP δ34S variability could be explained by distinct DMSP metabolism in sea ice microalgae. These findings advance our understanding of the sea ice sulfur cycle and metabolic adaptations of microbes in extreme environments. Text Antarc* Antarctic Ross Sea Sea ice Weddell Sea PubMed Central (PMC) Antarctic Ross Sea Weddell Weddell Sea Communications Biology 1 1 |
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Article Carnat, Gauthier Said-Ahmad, Ward Fripiat, François Wittek, Boris Tison, Jean-Louis Uhlig, Christiane Amrani, Alon Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
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description |
Sea ice microbial communities produce large amounts of the sulfur metabolite dimethylsulfoniopropionate (DMSP), a precursor of the climate cooling gas dimethylsulfide. Despite their importance to the polar sulfur cycle, drivers and metabolic pathways of sea ice DMSP are uncertain. Here we report the first measurements of sea ice DMSP sulfur isotopic composition (34S/32S ratio, δ34S). δ34S values in ice cores from the Ross Sea and Weddell Sea reveal considerable variability across seasons and between ice horizons (from +10.6 to +23.6‰). We discuss how the most extreme δ34S values observed could be related to unique DMSP cycling in the seasonally extreme physiochemical conditions of isolated brine inclusions in winter-spring. Using cell cultures, we show that part of the DMSP δ34S variability could be explained by distinct DMSP metabolism in sea ice microalgae. These findings advance our understanding of the sea ice sulfur cycle and metabolic adaptations of microbes in extreme environments. |
format |
Text |
author |
Carnat, Gauthier Said-Ahmad, Ward Fripiat, François Wittek, Boris Tison, Jean-Louis Uhlig, Christiane Amrani, Alon |
author_facet |
Carnat, Gauthier Said-Ahmad, Ward Fripiat, François Wittek, Boris Tison, Jean-Louis Uhlig, Christiane Amrani, Alon |
author_sort |
Carnat, Gauthier |
title |
Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
title_short |
Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
title_full |
Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
title_fullStr |
Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
title_full_unstemmed |
Variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in Antarctic sea ice |
title_sort |
variability in sulfur isotope composition suggests unique dimethylsulfoniopropionate cycling and microalgae metabolism in antarctic sea ice |
publisher |
Nature Publishing Group UK |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6279776/ http://www.ncbi.nlm.nih.gov/pubmed/30534604 https://doi.org/10.1038/s42003-018-0228-y |
geographic |
Antarctic Ross Sea Weddell Weddell Sea |
geographic_facet |
Antarctic Ross Sea Weddell Weddell Sea |
genre |
Antarc* Antarctic Ross Sea Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice Weddell Sea |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6279776/ http://www.ncbi.nlm.nih.gov/pubmed/30534604 http://dx.doi.org/10.1038/s42003-018-0228-y |
op_rights |
© The Author(s) 2018 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 http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s42003-018-0228-y |
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Communications Biology |
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