Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Applied and Environmental Microbiology 82 (2016): 4994-4999, doi:10.1128/AEM.00809-16. Subseafloor sediment hosts a large, taxonomically rich and me...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8252 2023-05-15T15:43:56+02:00 Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment Walsh, Emily A. Kirkpatrick, John B. Pockalny, Robert Sauvage, Justine Spivack, Arthur J. Murray, Richard W. Sogin, Mitchell L. D'Hondt, Steven 2016-06-10 https://hdl.handle.net/1912/8252 en_US eng American Society for Microbiology https://doi.org/10.1128/AEM.00809-16 Applied and Environmental Microbiology 82 (2016): 4994-4999 https://hdl.handle.net/1912/8252 doi:10.1128/AEM.00809-16 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Applied and Environmental Microbiology 82 (2016): 4994-4999 doi:10.1128/AEM.00809-16 Article 2016 ftwhoas https://doi.org/10.1128/AEM.00809-16 2022-05-28T22:59:39Z © The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Applied and Environmental Microbiology 82 (2016): 4994-4999, doi:10.1128/AEM.00809-16. Subseafloor sediment hosts a large, taxonomically rich and metabolically diverse microbial ecosystem. However, the factors that control microbial diversity in subseafloor sediment have rarely been explored. Here we show that bacterial richness varies with organic degradation rate and sediment age. At three open-ocean sites (in the Bering Sea and equatorial Pacific) and one continental margin site (Indian Ocean), richness decreases exponentially with increasing sediment depth. The rate of decrease in richness with depth varies from site to site. The vertical succession of predominant terminal electron acceptors correlates to abundance-weighted community composition, but does not drive the vertical decrease in richness. Vertical patterns of richness at the open-ocean sites closely match organic degradation rates; both properties are highest near the seafloor and decline together as sediment depth increases. This relationship suggests that (i) total catabolic activity and/or electron donor diversity exerts a primary influence on bacterial richness in marine sediment, and (ii) many bacterial taxa that are poorly adapted for subseafloor sedimentary conditions are degraded in the geologically young sediment where respiration rates are high. Richness consistently takes a few hundred thousand years to decline from near-seafloor values to much lower values in deep anoxic subseafloor sediment, regardless of sedimentation rate, predominant terminal electron acceptor, or oceanographic context. This work, including the efforts of Mitchell L. Sogin and Steven D’Hondt, was funded by Sloan Foundation (Census of Deep Life). This work, including the efforts of Steven D’Hondt, was funded by U.S. Science Support Program for IODP. This work, including the efforts of Steven D’Hondt, was funded ... Article in Journal/Newspaper Bering Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Bering Sea Pacific Indian Applied and Environmental Microbiology 82 16 4994 4999 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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English |
description |
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Applied and Environmental Microbiology 82 (2016): 4994-4999, doi:10.1128/AEM.00809-16. Subseafloor sediment hosts a large, taxonomically rich and metabolically diverse microbial ecosystem. However, the factors that control microbial diversity in subseafloor sediment have rarely been explored. Here we show that bacterial richness varies with organic degradation rate and sediment age. At three open-ocean sites (in the Bering Sea and equatorial Pacific) and one continental margin site (Indian Ocean), richness decreases exponentially with increasing sediment depth. The rate of decrease in richness with depth varies from site to site. The vertical succession of predominant terminal electron acceptors correlates to abundance-weighted community composition, but does not drive the vertical decrease in richness. Vertical patterns of richness at the open-ocean sites closely match organic degradation rates; both properties are highest near the seafloor and decline together as sediment depth increases. This relationship suggests that (i) total catabolic activity and/or electron donor diversity exerts a primary influence on bacterial richness in marine sediment, and (ii) many bacterial taxa that are poorly adapted for subseafloor sedimentary conditions are degraded in the geologically young sediment where respiration rates are high. Richness consistently takes a few hundred thousand years to decline from near-seafloor values to much lower values in deep anoxic subseafloor sediment, regardless of sedimentation rate, predominant terminal electron acceptor, or oceanographic context. This work, including the efforts of Mitchell L. Sogin and Steven D’Hondt, was funded by Sloan Foundation (Census of Deep Life). This work, including the efforts of Steven D’Hondt, was funded by U.S. Science Support Program for IODP. This work, including the efforts of Steven D’Hondt, was funded ... |
format |
Article in Journal/Newspaper |
author |
Walsh, Emily A. Kirkpatrick, John B. Pockalny, Robert Sauvage, Justine Spivack, Arthur J. Murray, Richard W. Sogin, Mitchell L. D'Hondt, Steven |
spellingShingle |
Walsh, Emily A. Kirkpatrick, John B. Pockalny, Robert Sauvage, Justine Spivack, Arthur J. Murray, Richard W. Sogin, Mitchell L. D'Hondt, Steven Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
author_facet |
Walsh, Emily A. Kirkpatrick, John B. Pockalny, Robert Sauvage, Justine Spivack, Arthur J. Murray, Richard W. Sogin, Mitchell L. D'Hondt, Steven |
author_sort |
Walsh, Emily A. |
title |
Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
title_short |
Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
title_full |
Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
title_fullStr |
Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
title_full_unstemmed |
Relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
title_sort |
relationship of bacterial richness to organic degradation rate and sediment age in subseafloor sediment |
publisher |
American Society for Microbiology |
publishDate |
2016 |
url |
https://hdl.handle.net/1912/8252 |
geographic |
Bering Sea Pacific Indian |
geographic_facet |
Bering Sea Pacific Indian |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Applied and Environmental Microbiology 82 (2016): 4994-4999 doi:10.1128/AEM.00809-16 |
op_relation |
https://doi.org/10.1128/AEM.00809-16 Applied and Environmental Microbiology 82 (2016): 4994-4999 https://hdl.handle.net/1912/8252 doi:10.1128/AEM.00809-16 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1128/AEM.00809-16 |
container_title |
Applied and Environmental Microbiology |
container_volume |
82 |
container_issue |
16 |
container_start_page |
4994 |
op_container_end_page |
4999 |
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1766378143315132416 |