Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments
The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Søndre Strømfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of...
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ftpubmed:oai:pubmedcentral.nih.gov:5486838 2023-05-15T16:29:29+02:00 Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments Cameron, Karen A. Stibal, Marek Olsen, Nikoline S. Mikkelsen, Andreas B. Elberling, Bo Jacobsen, Carsten S. 2017-01-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5486838/ http://www.ncbi.nlm.nih.gov/pubmed/28070677 https://doi.org/10.1007/s00248-016-0926-2 en eng Springer US http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5486838/ http://www.ncbi.nlm.nih.gov/pubmed/28070677 http://dx.doi.org/10.1007/s00248-016-0926-2 © The Author(s) 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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. CC-BY Note Text 2017 ftpubmed https://doi.org/10.1007/s00248-016-0926-2 2017-07-16T00:04:19Z The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Søndre Strømfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of sediments within the river delta. A long-term (12-month) incubation experiment was established using Watson River delta sediment under anaerobic conditions, with and without CO2/H2 enrichment. Within CO2/H2-amended incubations, sulphate depletion and a shift in the microbial community to a 52% predominance of Desulfosporosinus meridiei by day 371 provides evidence for sulphate reduction. We found evidence of methanogenesis in CO2/H2-amended incubations within the first 5 months, with production rates of ~4 pmol g−1 d−1, which was likely performed by methanogenic Methanomicrobiales- and Methanosarcinales-related organisms. Later, a reduction in methane was observed to be paired with the depletion of sulphate, and we hypothesise that sulphate reduction out competed hydrogenotrophic methanogenesis. The structure and diversity of the original CO2/H2-amended incubation communities changed dramatically with a major shift in predominant community members and a decline in diversity and cell abundance. These results highlight the need for further investigations into the fate of subglacial microbiota within downstream environments. Text Greenland Ice Sheet Søndre strømfjord PubMed Central (PMC) Greenland Microbial Ecology 74 1 6 9 |
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English |
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Note Cameron, Karen A. Stibal, Marek Olsen, Nikoline S. Mikkelsen, Andreas B. Elberling, Bo Jacobsen, Carsten S. Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
topic_facet |
Note |
description |
The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Søndre Strømfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of sediments within the river delta. A long-term (12-month) incubation experiment was established using Watson River delta sediment under anaerobic conditions, with and without CO2/H2 enrichment. Within CO2/H2-amended incubations, sulphate depletion and a shift in the microbial community to a 52% predominance of Desulfosporosinus meridiei by day 371 provides evidence for sulphate reduction. We found evidence of methanogenesis in CO2/H2-amended incubations within the first 5 months, with production rates of ~4 pmol g−1 d−1, which was likely performed by methanogenic Methanomicrobiales- and Methanosarcinales-related organisms. Later, a reduction in methane was observed to be paired with the depletion of sulphate, and we hypothesise that sulphate reduction out competed hydrogenotrophic methanogenesis. The structure and diversity of the original CO2/H2-amended incubation communities changed dramatically with a major shift in predominant community members and a decline in diversity and cell abundance. These results highlight the need for further investigations into the fate of subglacial microbiota within downstream environments. |
format |
Text |
author |
Cameron, Karen A. Stibal, Marek Olsen, Nikoline S. Mikkelsen, Andreas B. Elberling, Bo Jacobsen, Carsten S. |
author_facet |
Cameron, Karen A. Stibal, Marek Olsen, Nikoline S. Mikkelsen, Andreas B. Elberling, Bo Jacobsen, Carsten S. |
author_sort |
Cameron, Karen A. |
title |
Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
title_short |
Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
title_full |
Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
title_fullStr |
Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
title_full_unstemmed |
Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments |
title_sort |
potential activity of subglacial microbiota transported to anoxic river delta sediments |
publisher |
Springer US |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5486838/ http://www.ncbi.nlm.nih.gov/pubmed/28070677 https://doi.org/10.1007/s00248-016-0926-2 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Søndre strømfjord |
genre_facet |
Greenland Ice Sheet Søndre strømfjord |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5486838/ http://www.ncbi.nlm.nih.gov/pubmed/28070677 http://dx.doi.org/10.1007/s00248-016-0926-2 |
op_rights |
© The Author(s) 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00248-016-0926-2 |
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Microbial Ecology |
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74 |
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1 |
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6 |
op_container_end_page |
9 |
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1766019184073900032 |