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Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats
Intertidal permeable sediments are crucial sites of organic matter remineralization. These sediments likely have a large capacity to produce reactive oxygen species (ROS) because of shifting oxic-anoxic interfaces and intense iron-sulfur cycling. Here, we show that high concentrations of the ROS hyd...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9941506/ https://www.ncbi.nlm.nih.gov/pubmed/36804536 http://dx.doi.org/10.1038/s41467-023-35818-4 |
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author | van Erk, Marit R. Bourceau, Olivia M. Moncada, Chyrene Basu, Subhajit Hansel, Colleen M. de Beer, Dirk |
author_facet | van Erk, Marit R. Bourceau, Olivia M. Moncada, Chyrene Basu, Subhajit Hansel, Colleen M. de Beer, Dirk |
author_sort | van Erk, Marit R. |
collection | PubMed |
description | Intertidal permeable sediments are crucial sites of organic matter remineralization. These sediments likely have a large capacity to produce reactive oxygen species (ROS) because of shifting oxic-anoxic interfaces and intense iron-sulfur cycling. Here, we show that high concentrations of the ROS hydrogen peroxide are present in intertidal sediments using microsensors, and chemiluminescent analysis on extracted porewater. We furthermore investigate the effect of ROS on potential rates of microbial degradation processes in intertidal surface sediments after transient oxygenation, using slurries that transitioned from oxic to anoxic conditions. Enzymatic removal of ROS strongly increases rates of aerobic respiration, sulfate reduction and hydrogen accumulation. We conclude that ROS are formed in sediments, and subsequently moderate microbial mineralization process rates. Although sulfate reduction is completely inhibited in the oxic period, it resumes immediately upon anoxia. This study demonstrates the strong effects of ROS and transient oxygenation on the biogeochemistry of intertidal sediments. |
format | Online Article Text |
id | pubmed-9941506 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-99415062023-02-22 Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats van Erk, Marit R. Bourceau, Olivia M. Moncada, Chyrene Basu, Subhajit Hansel, Colleen M. de Beer, Dirk Nat Commun Article Intertidal permeable sediments are crucial sites of organic matter remineralization. These sediments likely have a large capacity to produce reactive oxygen species (ROS) because of shifting oxic-anoxic interfaces and intense iron-sulfur cycling. Here, we show that high concentrations of the ROS hydrogen peroxide are present in intertidal sediments using microsensors, and chemiluminescent analysis on extracted porewater. We furthermore investigate the effect of ROS on potential rates of microbial degradation processes in intertidal surface sediments after transient oxygenation, using slurries that transitioned from oxic to anoxic conditions. Enzymatic removal of ROS strongly increases rates of aerobic respiration, sulfate reduction and hydrogen accumulation. We conclude that ROS are formed in sediments, and subsequently moderate microbial mineralization process rates. Although sulfate reduction is completely inhibited in the oxic period, it resumes immediately upon anoxia. This study demonstrates the strong effects of ROS and transient oxygenation on the biogeochemistry of intertidal sediments. Nature Publishing Group UK 2023-02-20 /pmc/articles/PMC9941506/ /pubmed/36804536 http://dx.doi.org/10.1038/s41467-023-35818-4 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article van Erk, Marit R. Bourceau, Olivia M. Moncada, Chyrene Basu, Subhajit Hansel, Colleen M. de Beer, Dirk Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title | Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title_full | Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title_fullStr | Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title_full_unstemmed | Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title_short | Reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
title_sort | reactive oxygen species affect the potential for mineralization processes in permeable intertidal flats |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9941506/ https://www.ncbi.nlm.nih.gov/pubmed/36804536 http://dx.doi.org/10.1038/s41467-023-35818-4 |
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