The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study
A paradox is commonly observed in productive sea ice in which an accumulation in the macro-nutrients nitrate and phosphate coincides with an accumulation of autotrophic biomass. This paradox requires a new conceptual understanding of the biogeochemical processes operating in sea ice. In this study,...
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ftunivtasecite:oai:ecite.utas.edu.au:155793 2023-05-15T13:37:22+02:00 The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study Roukaerts, A Deman, F Van der Linden, F Carnat, G Bratkic, A Moreau, S Lannuzel, D Dehairs, F Delille, B Tison, J-L Fripat, F 2021 application/pdf http://ecite.utas.edu.au/155793 en eng University of California Press http://ecite.utas.edu.au/155793/1/155793 - The biogeochemical role of a microbial biofilm in sea ice.pdf http://purl.org/au-research/grants/arc/FT190100688 Roukaerts, A and Deman, F and Van der Linden, F and Carnat, G and Bratkic, A and Moreau, S and Lannuzel, D and Dehairs, F and Delille, B and Tison, J-L and Fripat, F, The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study, Elementa: Science of the Anthropocene, 9, (1) Article 00134. ISSN 2325-1026 (2021) [Refereed Article] http://ecite.utas.edu.au/155793 Earth Sciences Oceanography Chemical oceanography Refereed Article PeerReviewed 2021 ftunivtasecite 2023-03-20T23:17:26Z A paradox is commonly observed in productive sea ice in which an accumulation in the macro-nutrients nitrate and phosphate coincides with an accumulation of autotrophic biomass. This paradox requires a new conceptual understanding of the biogeochemical processes operating in sea ice. In this study, we investigate this paradox using three time series in Antarctic landfast sea ice, in which massive algal blooms are reported (with particulate organic carbon concentrations up to 2,600 mol L 1 ) and bulk nutrient concentrations exceed seawater values up to 3 times for nitrate and up to 19 times for phosphate. High-resolution sampling of the bottom 10 cm of the cores shows that high biomass concentrations coexist with high concentrations of nutrients at the subcentimeter scale. Applying a nutrient-phytoplankton-zooplankton-detritus model approach to this sea-ice system, we propose the presence of a microbial biofilm as a working hypothesis to resolve this paradox. By creating microenvironments with distinct biogeochemical dynamics, as well as favoring nutrient adsorption onto embedded decaying organic matter, a biofilm allows the accumulation of remineralization products (nutrients) in proximity to the sympagic (ice-associated) community. In addition to modifying the intrinsic physicochemical properties of the sea ice and providing a substrate for sympagic community attachment, the biofilm is suggested to play a key role in the flux of matter and energy in this environment. Article in Journal/Newspaper Antarc* Antarctic Sea ice eCite UTAS (University of Tasmania) Antarctic |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical oceanography |
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Earth Sciences Oceanography Chemical oceanography Roukaerts, A Deman, F Van der Linden, F Carnat, G Bratkic, A Moreau, S Lannuzel, D Dehairs, F Delille, B Tison, J-L Fripat, F The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
topic_facet |
Earth Sciences Oceanography Chemical oceanography |
description |
A paradox is commonly observed in productive sea ice in which an accumulation in the macro-nutrients nitrate and phosphate coincides with an accumulation of autotrophic biomass. This paradox requires a new conceptual understanding of the biogeochemical processes operating in sea ice. In this study, we investigate this paradox using three time series in Antarctic landfast sea ice, in which massive algal blooms are reported (with particulate organic carbon concentrations up to 2,600 mol L 1 ) and bulk nutrient concentrations exceed seawater values up to 3 times for nitrate and up to 19 times for phosphate. High-resolution sampling of the bottom 10 cm of the cores shows that high biomass concentrations coexist with high concentrations of nutrients at the subcentimeter scale. Applying a nutrient-phytoplankton-zooplankton-detritus model approach to this sea-ice system, we propose the presence of a microbial biofilm as a working hypothesis to resolve this paradox. By creating microenvironments with distinct biogeochemical dynamics, as well as favoring nutrient adsorption onto embedded decaying organic matter, a biofilm allows the accumulation of remineralization products (nutrients) in proximity to the sympagic (ice-associated) community. In addition to modifying the intrinsic physicochemical properties of the sea ice and providing a substrate for sympagic community attachment, the biofilm is suggested to play a key role in the flux of matter and energy in this environment. |
format |
Article in Journal/Newspaper |
author |
Roukaerts, A Deman, F Van der Linden, F Carnat, G Bratkic, A Moreau, S Lannuzel, D Dehairs, F Delille, B Tison, J-L Fripat, F |
author_facet |
Roukaerts, A Deman, F Van der Linden, F Carnat, G Bratkic, A Moreau, S Lannuzel, D Dehairs, F Delille, B Tison, J-L Fripat, F |
author_sort |
Roukaerts, A |
title |
The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
title_short |
The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
title_full |
The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
title_fullStr |
The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
title_full_unstemmed |
The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study |
title_sort |
biogeochemical role of a microbial biofilm in sea ice: antarctic landfast sea ice as a case study |
publisher |
University of California Press |
publishDate |
2021 |
url |
http://ecite.utas.edu.au/155793 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
http://ecite.utas.edu.au/155793/1/155793 - The biogeochemical role of a microbial biofilm in sea ice.pdf http://purl.org/au-research/grants/arc/FT190100688 Roukaerts, A and Deman, F and Van der Linden, F and Carnat, G and Bratkic, A and Moreau, S and Lannuzel, D and Dehairs, F and Delille, B and Tison, J-L and Fripat, F, The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study, Elementa: Science of the Anthropocene, 9, (1) Article 00134. ISSN 2325-1026 (2021) [Refereed Article] http://ecite.utas.edu.au/155793 |
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1766090798438285312 |