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Abundance and Biogeochemical Impact of Cable Bacteria in Baltic Sea Sediments
[Image: see text] Oxygen depletion in coastal waters may lead to release of toxic sulfide from sediments. Cable bacteria can limit sulfide release by promoting iron oxide formation in sediments. Currently, it is unknown how widespread this phenomenon is. Here, we assess the abundance, activity, and...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611076/ https://www.ncbi.nlm.nih.gov/pubmed/31149818 http://dx.doi.org/10.1021/acs.est.9b01665 |
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author | Hermans, Martijn Lenstra, Wytze K. Hidalgo-Martinez, Silvia van Helmond, Niels A. G. M. Witbaard, Rob Meysman, Filip J.R. Gonzalez, Santiago Slomp, Caroline P. |
author_facet | Hermans, Martijn Lenstra, Wytze K. Hidalgo-Martinez, Silvia van Helmond, Niels A. G. M. Witbaard, Rob Meysman, Filip J.R. Gonzalez, Santiago Slomp, Caroline P. |
author_sort | Hermans, Martijn |
collection | PubMed |
description | [Image: see text] Oxygen depletion in coastal waters may lead to release of toxic sulfide from sediments. Cable bacteria can limit sulfide release by promoting iron oxide formation in sediments. Currently, it is unknown how widespread this phenomenon is. Here, we assess the abundance, activity, and biogeochemical impact of cable bacteria at 12 Baltic Sea sites. Cable bacteria were mostly absent in sediments overlain by anoxic and sulfidic bottom waters, emphasizing their dependence on oxygen or nitrate as electron acceptors. At sites that were temporarily reoxygenated, cable bacterial densities were low. At seasonally hypoxic sites, cable bacterial densities correlated linearly with the supply of sulfide. The highest densities were observed at Gulf of Finland sites with high rates of sulfate reduction. Microelectrode profiles of sulfide, oxygen, and pH indicated low or no in situ cable bacteria activity at all sites. Reactivation occurred within 5 days upon incubation of an intact sediment core from the Gulf of Finland with aerated overlying water. We found no relationship between cable bacterial densities and macrofaunal abundances, salinity, or sediment organic carbon. Our geochemical data suggest that cable bacteria promote conversion of iron monosulfides to iron oxides in the Gulf of Finland in spring, possibly explaining why bottom waters in this highly eutrophic region rarely contain sulfide in summer. |
format | Online Article Text |
id | pubmed-6611076 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66110762019-07-09 Abundance and Biogeochemical Impact of Cable Bacteria in Baltic Sea Sediments Hermans, Martijn Lenstra, Wytze K. Hidalgo-Martinez, Silvia van Helmond, Niels A. G. M. Witbaard, Rob Meysman, Filip J.R. Gonzalez, Santiago Slomp, Caroline P. Environ Sci Technol [Image: see text] Oxygen depletion in coastal waters may lead to release of toxic sulfide from sediments. Cable bacteria can limit sulfide release by promoting iron oxide formation in sediments. Currently, it is unknown how widespread this phenomenon is. Here, we assess the abundance, activity, and biogeochemical impact of cable bacteria at 12 Baltic Sea sites. Cable bacteria were mostly absent in sediments overlain by anoxic and sulfidic bottom waters, emphasizing their dependence on oxygen or nitrate as electron acceptors. At sites that were temporarily reoxygenated, cable bacterial densities were low. At seasonally hypoxic sites, cable bacterial densities correlated linearly with the supply of sulfide. The highest densities were observed at Gulf of Finland sites with high rates of sulfate reduction. Microelectrode profiles of sulfide, oxygen, and pH indicated low or no in situ cable bacteria activity at all sites. Reactivation occurred within 5 days upon incubation of an intact sediment core from the Gulf of Finland with aerated overlying water. We found no relationship between cable bacterial densities and macrofaunal abundances, salinity, or sediment organic carbon. Our geochemical data suggest that cable bacteria promote conversion of iron monosulfides to iron oxides in the Gulf of Finland in spring, possibly explaining why bottom waters in this highly eutrophic region rarely contain sulfide in summer. American Chemical Society 2019-05-31 2019-07-02 /pmc/articles/PMC6611076/ /pubmed/31149818 http://dx.doi.org/10.1021/acs.est.9b01665 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Hermans, Martijn Lenstra, Wytze K. Hidalgo-Martinez, Silvia van Helmond, Niels A. G. M. Witbaard, Rob Meysman, Filip J.R. Gonzalez, Santiago Slomp, Caroline P. Abundance and Biogeochemical Impact of Cable Bacteria in Baltic Sea Sediments |
title | Abundance
and Biogeochemical Impact of Cable Bacteria
in Baltic Sea Sediments |
title_full | Abundance
and Biogeochemical Impact of Cable Bacteria
in Baltic Sea Sediments |
title_fullStr | Abundance
and Biogeochemical Impact of Cable Bacteria
in Baltic Sea Sediments |
title_full_unstemmed | Abundance
and Biogeochemical Impact of Cable Bacteria
in Baltic Sea Sediments |
title_short | Abundance
and Biogeochemical Impact of Cable Bacteria
in Baltic Sea Sediments |
title_sort | abundance
and biogeochemical impact of cable bacteria
in baltic sea sediments |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611076/ https://www.ncbi.nlm.nih.gov/pubmed/31149818 http://dx.doi.org/10.1021/acs.est.9b01665 |
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