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Aerobic microbial communities in the sediments of a marine oxygen minimum zone

The ecology of aerobic microorganisms is never explored in marine oxygen minimum zone (OMZ) sediments. Here we reveal aerobic bacterial communities along ∼3 m sediment-horizons of the eastern Arabian Sea OMZ. Sulfide-containing sediment-cores retrieved from 530 mbsl (meters beneath the sea-level) an...

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Autores principales: Bhattacharya, Sabyasachi, Roy, Chayan, Mandal, Subhrangshu, Sarkar, Jagannath, Rameez, Moidu Jameela, Mondal, Nibendu, Mapder, Tarunendu, Chatterjee, Sumit, Pyne, Prosenjit, Alam, Masrure, Haldar, Prabir Kumar, Roy, Rimi, Fernandes, Svetlana, Peketi, Aditya, Chakraborty, Ranadhir, Mazumdar, Aninda, Ghosh, Wriddhiman
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568448/
https://www.ncbi.nlm.nih.gov/pubmed/32975580
http://dx.doi.org/10.1093/femsle/fnaa157
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author Bhattacharya, Sabyasachi
Roy, Chayan
Mandal, Subhrangshu
Sarkar, Jagannath
Rameez, Moidu Jameela
Mondal, Nibendu
Mapder, Tarunendu
Chatterjee, Sumit
Pyne, Prosenjit
Alam, Masrure
Haldar, Prabir Kumar
Roy, Rimi
Fernandes, Svetlana
Peketi, Aditya
Chakraborty, Ranadhir
Mazumdar, Aninda
Ghosh, Wriddhiman
author_facet Bhattacharya, Sabyasachi
Roy, Chayan
Mandal, Subhrangshu
Sarkar, Jagannath
Rameez, Moidu Jameela
Mondal, Nibendu
Mapder, Tarunendu
Chatterjee, Sumit
Pyne, Prosenjit
Alam, Masrure
Haldar, Prabir Kumar
Roy, Rimi
Fernandes, Svetlana
Peketi, Aditya
Chakraborty, Ranadhir
Mazumdar, Aninda
Ghosh, Wriddhiman
author_sort Bhattacharya, Sabyasachi
collection PubMed
description The ecology of aerobic microorganisms is never explored in marine oxygen minimum zone (OMZ) sediments. Here we reveal aerobic bacterial communities along ∼3 m sediment-horizons of the eastern Arabian Sea OMZ. Sulfide-containing sediment-cores retrieved from 530 mbsl (meters beneath the sea-level) and 580 mbsl were explored at 15–30 cm intervals, using metagenomics, pure-culture-isolation, genomics and metatranscriptomics. Genes for aerobic respiration, and oxidation of methane/ammonia/alcohols/thiosulfate/sulfite/organosulfur-compounds, were detected in the metagenomes from all 25 sediment-samples explored. Most probable numbers for aerobic chemolithoautotrophs and chemoorganoheterotrophs at individual sample-sites were up to 1.1 × 10(7) (g sediment)(-1). The sediment-sample collected from 275 cmbsf (centimeters beneath the seafloor) of the 530-mbsl-core yielded many such obligately aerobic isolates belonging to Cereibacter, Guyparkeria, Halomonas, Methylophaga, Pseudomonas and Sulfitobacter which died upon anaerobic incubation, despite being provided with all possible electron acceptors and fermentative substrates. High percentages of metatranscriptomic reads from the 275 cmbsf sediment-sample, and metagenomic reads from all 25 sediment-samples, matched the isolates’ genomic sequences including those for aerobic metabolisms, genetic/environmental information processing and cell division, thereby illustrating the bacteria's in-situ activity, and ubiquity across the sediment-horizons, respectively. The findings hold critical implications for organic carbon sequestration/remineralization, and inorganic compounds oxidation, within the sediment realm of global marine OMZs.
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spelling pubmed-75684482020-10-21 Aerobic microbial communities in the sediments of a marine oxygen minimum zone Bhattacharya, Sabyasachi Roy, Chayan Mandal, Subhrangshu Sarkar, Jagannath Rameez, Moidu Jameela Mondal, Nibendu Mapder, Tarunendu Chatterjee, Sumit Pyne, Prosenjit Alam, Masrure Haldar, Prabir Kumar Roy, Rimi Fernandes, Svetlana Peketi, Aditya Chakraborty, Ranadhir Mazumdar, Aninda Ghosh, Wriddhiman FEMS Microbiol Lett Research Letter The ecology of aerobic microorganisms is never explored in marine oxygen minimum zone (OMZ) sediments. Here we reveal aerobic bacterial communities along ∼3 m sediment-horizons of the eastern Arabian Sea OMZ. Sulfide-containing sediment-cores retrieved from 530 mbsl (meters beneath the sea-level) and 580 mbsl were explored at 15–30 cm intervals, using metagenomics, pure-culture-isolation, genomics and metatranscriptomics. Genes for aerobic respiration, and oxidation of methane/ammonia/alcohols/thiosulfate/sulfite/organosulfur-compounds, were detected in the metagenomes from all 25 sediment-samples explored. Most probable numbers for aerobic chemolithoautotrophs and chemoorganoheterotrophs at individual sample-sites were up to 1.1 × 10(7) (g sediment)(-1). The sediment-sample collected from 275 cmbsf (centimeters beneath the seafloor) of the 530-mbsl-core yielded many such obligately aerobic isolates belonging to Cereibacter, Guyparkeria, Halomonas, Methylophaga, Pseudomonas and Sulfitobacter which died upon anaerobic incubation, despite being provided with all possible electron acceptors and fermentative substrates. High percentages of metatranscriptomic reads from the 275 cmbsf sediment-sample, and metagenomic reads from all 25 sediment-samples, matched the isolates’ genomic sequences including those for aerobic metabolisms, genetic/environmental information processing and cell division, thereby illustrating the bacteria's in-situ activity, and ubiquity across the sediment-horizons, respectively. The findings hold critical implications for organic carbon sequestration/remineralization, and inorganic compounds oxidation, within the sediment realm of global marine OMZs. Oxford University Press 2020-09-25 /pmc/articles/PMC7568448/ /pubmed/32975580 http://dx.doi.org/10.1093/femsle/fnaa157 Text en © The Author(s) 2020. Published by Oxford University Press on behalf of FEMS. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Research Letter
Bhattacharya, Sabyasachi
Roy, Chayan
Mandal, Subhrangshu
Sarkar, Jagannath
Rameez, Moidu Jameela
Mondal, Nibendu
Mapder, Tarunendu
Chatterjee, Sumit
Pyne, Prosenjit
Alam, Masrure
Haldar, Prabir Kumar
Roy, Rimi
Fernandes, Svetlana
Peketi, Aditya
Chakraborty, Ranadhir
Mazumdar, Aninda
Ghosh, Wriddhiman
Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title_full Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title_fullStr Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title_full_unstemmed Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title_short Aerobic microbial communities in the sediments of a marine oxygen minimum zone
title_sort aerobic microbial communities in the sediments of a marine oxygen minimum zone
topic Research Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568448/
https://www.ncbi.nlm.nih.gov/pubmed/32975580
http://dx.doi.org/10.1093/femsle/fnaa157
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