Microbial activity affects sulphur in biogenic aragonite
Abstract Carbonates that exhibit obvious diagenetic alteration are usually excluded as archives in palaeoenvironmental studies. However, the potential impact of microbial alteration during early diagenesis is still poorly explored. To investigate the sensitivity of sulphur concentration, distributio...
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ftdoajarticles:oai:doaj.org/article:caa063cba9db40fc818b0bf08a366948 2023-05-15T15:22:35+02:00 Microbial activity affects sulphur in biogenic aragonite Vanessa Fichtner Skadi M. Lange Stefan Krause Thomas Huthwelker Camelia N. Borca Simon L. Schurr Adrian Immenhauser Chelsea L. Pederson Tina Treude Andrea M. Erhardt Harald Strauss 2021-09-01T00:00:00Z https://doi.org/10.1002/dep2.133 https://doaj.org/article/caa063cba9db40fc818b0bf08a366948 EN eng Wiley https://doi.org/10.1002/dep2.133 https://doaj.org/toc/2055-4877 2055-4877 doi:10.1002/dep2.133 https://doaj.org/article/caa063cba9db40fc818b0bf08a366948 The Depositional Record, Vol 7, Iss 3, Pp 500-519 (2021) carbonate diagenesis carbonate‐associated sulphate microbial alteration stable sulphur isotopes Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1002/dep2.133 2022-12-31T06:48:34Z Abstract Carbonates that exhibit obvious diagenetic alteration are usually excluded as archives in palaeoenvironmental studies. However, the potential impact of microbial alteration during early diagenesis is still poorly explored. To investigate the sensitivity of sulphur concentration, distribution, oxidation state and isotopic composition in marine aragonite to microbial alteration, Arctica islandica bivalves and Porites sp. corals were experimentally exposed to anaerobic microbial activity. The anoxic incubation media included a benthic bacterial strain Shewanella sediminis and a natural anoxic sediment slurry with a natural microbial community of unknown species. Combined fluorescence microscopy and synchrotron‐based analysis of the sulphur distribution and oxidation state enabled a comparison of organic matter and sulphur content in the two materials. Results revealed a higher proportion of reduced sulphur species and locally stronger fluorescence within the pristine bivalve shell compared to the pristine coral skeleton. Within the pristine bivalve specimen, reduced sulphur was enriched in layers along the inner shell margin. After incubation in the anoxic sediment slurry, this region revealed rust‐brown staining and a patchy S2‐ distribution pattern rather than S2‐‐layers. Another effect on sulphur distribution was rust‐brown coloured fibres along one growth line, revealing a locally higher proportion of sulphur. The δ34S value of carbonate‐associated sulphate remained largely unaffected by both incubation media, but a lower δ34S value of water‐soluble sulphate reflected the degradation of insoluble organic matter by microbes in both experiments. No significant alteration was detected in the coral samples exposed to microbial alteration. The data clearly identified a distinct sensitivity of organically bound sulphur in biogenic aragonite to microbial alteration even when ‘traditional’ geochemical proxies such as δ18OCARB or δ13CCARB in the carbonate did not show any effect. Differences in the intensity of ... Article in Journal/Newspaper Arctica islandica Directory of Open Access Journals: DOAJ Articles The Depositional Record 7 3 500 519 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
carbonate diagenesis carbonate‐associated sulphate microbial alteration stable sulphur isotopes Geology QE1-996.5 |
spellingShingle |
carbonate diagenesis carbonate‐associated sulphate microbial alteration stable sulphur isotopes Geology QE1-996.5 Vanessa Fichtner Skadi M. Lange Stefan Krause Thomas Huthwelker Camelia N. Borca Simon L. Schurr Adrian Immenhauser Chelsea L. Pederson Tina Treude Andrea M. Erhardt Harald Strauss Microbial activity affects sulphur in biogenic aragonite |
topic_facet |
carbonate diagenesis carbonate‐associated sulphate microbial alteration stable sulphur isotopes Geology QE1-996.5 |
description |
Abstract Carbonates that exhibit obvious diagenetic alteration are usually excluded as archives in palaeoenvironmental studies. However, the potential impact of microbial alteration during early diagenesis is still poorly explored. To investigate the sensitivity of sulphur concentration, distribution, oxidation state and isotopic composition in marine aragonite to microbial alteration, Arctica islandica bivalves and Porites sp. corals were experimentally exposed to anaerobic microbial activity. The anoxic incubation media included a benthic bacterial strain Shewanella sediminis and a natural anoxic sediment slurry with a natural microbial community of unknown species. Combined fluorescence microscopy and synchrotron‐based analysis of the sulphur distribution and oxidation state enabled a comparison of organic matter and sulphur content in the two materials. Results revealed a higher proportion of reduced sulphur species and locally stronger fluorescence within the pristine bivalve shell compared to the pristine coral skeleton. Within the pristine bivalve specimen, reduced sulphur was enriched in layers along the inner shell margin. After incubation in the anoxic sediment slurry, this region revealed rust‐brown staining and a patchy S2‐ distribution pattern rather than S2‐‐layers. Another effect on sulphur distribution was rust‐brown coloured fibres along one growth line, revealing a locally higher proportion of sulphur. The δ34S value of carbonate‐associated sulphate remained largely unaffected by both incubation media, but a lower δ34S value of water‐soluble sulphate reflected the degradation of insoluble organic matter by microbes in both experiments. No significant alteration was detected in the coral samples exposed to microbial alteration. The data clearly identified a distinct sensitivity of organically bound sulphur in biogenic aragonite to microbial alteration even when ‘traditional’ geochemical proxies such as δ18OCARB or δ13CCARB in the carbonate did not show any effect. Differences in the intensity of ... |
format |
Article in Journal/Newspaper |
author |
Vanessa Fichtner Skadi M. Lange Stefan Krause Thomas Huthwelker Camelia N. Borca Simon L. Schurr Adrian Immenhauser Chelsea L. Pederson Tina Treude Andrea M. Erhardt Harald Strauss |
author_facet |
Vanessa Fichtner Skadi M. Lange Stefan Krause Thomas Huthwelker Camelia N. Borca Simon L. Schurr Adrian Immenhauser Chelsea L. Pederson Tina Treude Andrea M. Erhardt Harald Strauss |
author_sort |
Vanessa Fichtner |
title |
Microbial activity affects sulphur in biogenic aragonite |
title_short |
Microbial activity affects sulphur in biogenic aragonite |
title_full |
Microbial activity affects sulphur in biogenic aragonite |
title_fullStr |
Microbial activity affects sulphur in biogenic aragonite |
title_full_unstemmed |
Microbial activity affects sulphur in biogenic aragonite |
title_sort |
microbial activity affects sulphur in biogenic aragonite |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1002/dep2.133 https://doaj.org/article/caa063cba9db40fc818b0bf08a366948 |
genre |
Arctica islandica |
genre_facet |
Arctica islandica |
op_source |
The Depositional Record, Vol 7, Iss 3, Pp 500-519 (2021) |
op_relation |
https://doi.org/10.1002/dep2.133 https://doaj.org/toc/2055-4877 2055-4877 doi:10.1002/dep2.133 https://doaj.org/article/caa063cba9db40fc818b0bf08a366948 |
op_doi |
https://doi.org/10.1002/dep2.133 |
container_title |
The Depositional Record |
container_volume |
7 |
container_issue |
3 |
container_start_page |
500 |
op_container_end_page |
519 |
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1766353219922952192 |