Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada)
Measurements of porewater O2, pH, and H2S microprofiles in intact sediment cores collected in a northern saltmarsh in the St. Lawrence Estuary (Quebec, Canada) revealed the occurrence of electrogenic sulfur oxidation (e-SOx) by filamentous “cable” bacteria in submerged marsh pond sediments in the hi...
Published in: | Canadian Journal of Microbiology |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/7cdf2610-5145-4496-9220-c03a82698373 2023-12-31T10:23:29+01:00 Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) Rao, Alexandra Risgaard-Petersen, Nils Neumeier, Urs 2016 https://pure.au.dk/portal/da/publications/electrogenic-sulfur-oxidation-in-a-northern-saltmarsh-st-lawrence-estuary-canada(7cdf2610-5145-4496-9220-c03a82698373).html https://doi.org/10.1139/cjm-2015-0748 eng eng https://pure.au.dk/portal/da/publications/electrogenic-sulfur-oxidation-in-a-northern-saltmarsh-st-lawrence-estuary-canada(7cdf2610-5145-4496-9220-c03a82698373).html info:eu-repo/semantics/restrictedAccess Rao , A , Risgaard-Petersen , N & Neumeier , U 2016 , ' Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) ' , Canadian Journal of Microbiology , vol. 62 , no. 6 , pp. 530-537 . https://doi.org/10.1139/cjm-2015-0748 Cable bacteria Electrogenic sulfur oxidation Microelectrodes Salt marsh Sulfur cycle article 2016 ftuniaarhuspubl https://doi.org/10.1139/cjm-2015-0748 2023-12-07T00:01:45Z Measurements of porewater O2, pH, and H2S microprofiles in intact sediment cores collected in a northern saltmarsh in the St. Lawrence Estuary (Quebec, Canada) revealed the occurrence of electrogenic sulfur oxidation (e-SOx) by filamentous “cable” bacteria in submerged marsh pond sediments in the high marsh. In summer, the geochemical fingerprint of e-SOx was apparent in intact cores, while in fall, cable bacteria were detected by fluorescence in situ hybridization and the characteristic geochemical signature of e-SOx was observed only upon prolonged incubation. In exposed, unvegetated creek bank sediments sampled in the low marsh in summer, cable bacteria developed only in repacked cores of sieved (500 m), homogenized sediments. These results suggest that e-SOx is suppressed by the activity of macrofauna in exposed, unvegetated marsh sediments. A reduced abundance of benthic invertebrates may promote e-SOx development in marsh ponds, which are dominant features of subarctic saltmarshes as in the St. Lawrence Estuary. Article in Journal/Newspaper Subarctic Aarhus University: Research Canadian Journal of Microbiology 62 6 530 537 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
topic |
Cable bacteria Electrogenic sulfur oxidation Microelectrodes Salt marsh Sulfur cycle |
spellingShingle |
Cable bacteria Electrogenic sulfur oxidation Microelectrodes Salt marsh Sulfur cycle Rao, Alexandra Risgaard-Petersen, Nils Neumeier, Urs Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
topic_facet |
Cable bacteria Electrogenic sulfur oxidation Microelectrodes Salt marsh Sulfur cycle |
description |
Measurements of porewater O2, pH, and H2S microprofiles in intact sediment cores collected in a northern saltmarsh in the St. Lawrence Estuary (Quebec, Canada) revealed the occurrence of electrogenic sulfur oxidation (e-SOx) by filamentous “cable” bacteria in submerged marsh pond sediments in the high marsh. In summer, the geochemical fingerprint of e-SOx was apparent in intact cores, while in fall, cable bacteria were detected by fluorescence in situ hybridization and the characteristic geochemical signature of e-SOx was observed only upon prolonged incubation. In exposed, unvegetated creek bank sediments sampled in the low marsh in summer, cable bacteria developed only in repacked cores of sieved (500 m), homogenized sediments. These results suggest that e-SOx is suppressed by the activity of macrofauna in exposed, unvegetated marsh sediments. A reduced abundance of benthic invertebrates may promote e-SOx development in marsh ponds, which are dominant features of subarctic saltmarshes as in the St. Lawrence Estuary. |
format |
Article in Journal/Newspaper |
author |
Rao, Alexandra Risgaard-Petersen, Nils Neumeier, Urs |
author_facet |
Rao, Alexandra Risgaard-Petersen, Nils Neumeier, Urs |
author_sort |
Rao, Alexandra |
title |
Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
title_short |
Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
title_full |
Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
title_fullStr |
Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
title_full_unstemmed |
Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) |
title_sort |
electrogenic sulfur oxidation in a northern saltmarsh (st. lawrence estuary, canada) |
publishDate |
2016 |
url |
https://pure.au.dk/portal/da/publications/electrogenic-sulfur-oxidation-in-a-northern-saltmarsh-st-lawrence-estuary-canada(7cdf2610-5145-4496-9220-c03a82698373).html https://doi.org/10.1139/cjm-2015-0748 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Rao , A , Risgaard-Petersen , N & Neumeier , U 2016 , ' Electrogenic sulfur oxidation in a northern saltmarsh (St. Lawrence Estuary, Canada) ' , Canadian Journal of Microbiology , vol. 62 , no. 6 , pp. 530-537 . https://doi.org/10.1139/cjm-2015-0748 |
op_relation |
https://pure.au.dk/portal/da/publications/electrogenic-sulfur-oxidation-in-a-northern-saltmarsh-st-lawrence-estuary-canada(7cdf2610-5145-4496-9220-c03a82698373).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1139/cjm-2015-0748 |
container_title |
Canadian Journal of Microbiology |
container_volume |
62 |
container_issue |
6 |
container_start_page |
530 |
op_container_end_page |
537 |
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1786835168122634240 |