Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition.
Carbon oxidation rates and pathways were determined in two sediments at latitude 75° and 77°N southeast of Svalbard in the northern Barents Sea. Seasonal ice cover restricts primary production to few months a year, which determines the sedimentation rate of organic material to the seafloor. At one s...
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2008
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Online Access: | https://pure.au.dk/portal/da/publications/microbial-mniv-and-feiii-reduction-in-northern-barents-sea-sediments-under-different-conditions-of-ice-cover-and-organic-carbon-deposition(d81b38b0-ed42-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.dsr2.2008.05.003 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/d81b38b0-ed42-11dd-8f9a-000ea68e967b 2023-05-15T15:38:32+02:00 Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. Nickel, Maren Vandieken, Verona Brüchert, Volker Jørgensen, Bo Barker 2008 https://pure.au.dk/portal/da/publications/microbial-mniv-and-feiii-reduction-in-northern-barents-sea-sediments-under-different-conditions-of-ice-cover-and-organic-carbon-deposition(d81b38b0-ed42-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.dsr2.2008.05.003 eng eng info:eu-repo/semantics/restrictedAccess Nickel , M , Vandieken , V , Brüchert , V & Jørgensen , B B 2008 , ' Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. ' , Deep-Sea Research. Part 2: Topical Studies in Oceanography , vol. 55 , pp. 2390-2398 . https://doi.org/10.1016/j.dsr2.2008.05.003 article 2008 ftuniaarhuspubl https://doi.org/10.1016/j.dsr2.2008.05.003 2022-02-09T23:49:39Z Carbon oxidation rates and pathways were determined in two sediments at latitude 75° and 77°N southeast of Svalbard in the northern Barents Sea. Seasonal ice cover restricts primary production to few months a year, which determines the sedimentation rate of organic material to the seafloor. At one station, with seasonally extended ice cover, low organic carbon content and sedimentation rate combined with relatively high concentrations of Mn and Fe(III) oxides favored dissimilatory Fe and Mn reduction (98% of anaerobic carbon oxidation) over sulfate reduction in the top 12 cm of the sediment. In contrast, in a sediment that had not been ice covered for at least 12 months and with more organic carbon and a higher sedimentation rate, sulfate reduction was the most important anaerobic electron-accepting process (>80% of anaerobic carbon oxidation). In the upper 3 cm, microbial Fe and sulfate reduction occurred simultaneously, and sulfate reduction dominated at 3-12 cm. Oxygen consumption rates (1.9 and 3.7 mmol m -2 d -1 ) and anaerobic CO 2 production rates (1.3 and 6.4 mmol m -2 d -1 ) of both stations were similar to rates from open-ocean sediments farther north in the Barents Sea but lower compared to those in fjords of Svalbard. Article in Journal/Newspaper Barents Sea Svalbard Aarhus University: Research Barents Sea Svalbard Deep Sea Research Part II: Topical Studies in Oceanography 55 20-21 2390 2398 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Carbon oxidation rates and pathways were determined in two sediments at latitude 75° and 77°N southeast of Svalbard in the northern Barents Sea. Seasonal ice cover restricts primary production to few months a year, which determines the sedimentation rate of organic material to the seafloor. At one station, with seasonally extended ice cover, low organic carbon content and sedimentation rate combined with relatively high concentrations of Mn and Fe(III) oxides favored dissimilatory Fe and Mn reduction (98% of anaerobic carbon oxidation) over sulfate reduction in the top 12 cm of the sediment. In contrast, in a sediment that had not been ice covered for at least 12 months and with more organic carbon and a higher sedimentation rate, sulfate reduction was the most important anaerobic electron-accepting process (>80% of anaerobic carbon oxidation). In the upper 3 cm, microbial Fe and sulfate reduction occurred simultaneously, and sulfate reduction dominated at 3-12 cm. Oxygen consumption rates (1.9 and 3.7 mmol m -2 d -1 ) and anaerobic CO 2 production rates (1.3 and 6.4 mmol m -2 d -1 ) of both stations were similar to rates from open-ocean sediments farther north in the Barents Sea but lower compared to those in fjords of Svalbard. |
format |
Article in Journal/Newspaper |
author |
Nickel, Maren Vandieken, Verona Brüchert, Volker Jørgensen, Bo Barker |
spellingShingle |
Nickel, Maren Vandieken, Verona Brüchert, Volker Jørgensen, Bo Barker Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
author_facet |
Nickel, Maren Vandieken, Verona Brüchert, Volker Jørgensen, Bo Barker |
author_sort |
Nickel, Maren |
title |
Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
title_short |
Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
title_full |
Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
title_fullStr |
Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
title_full_unstemmed |
Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. |
title_sort |
microbial mn(iv) and fe(iii) reduction in northern barents sea sediments under different conditions of ice cover and organic carbon deposition. |
publishDate |
2008 |
url |
https://pure.au.dk/portal/da/publications/microbial-mniv-and-feiii-reduction-in-northern-barents-sea-sediments-under-different-conditions-of-ice-cover-and-organic-carbon-deposition(d81b38b0-ed42-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.dsr2.2008.05.003 |
geographic |
Barents Sea Svalbard |
geographic_facet |
Barents Sea Svalbard |
genre |
Barents Sea Svalbard |
genre_facet |
Barents Sea Svalbard |
op_source |
Nickel , M , Vandieken , V , Brüchert , V & Jørgensen , B B 2008 , ' Microbial Mn(IV) and Fe(III) reduction in northern Barents Sea sediments under different conditions of ice cover and organic carbon deposition. ' , Deep-Sea Research. Part 2: Topical Studies in Oceanography , vol. 55 , pp. 2390-2398 . https://doi.org/10.1016/j.dsr2.2008.05.003 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2008.05.003 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
55 |
container_issue |
20-21 |
container_start_page |
2390 |
op_container_end_page |
2398 |
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1766369517790822400 |