The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments
The area around the Antarctic Peninsula (AP) is facing rapid climatic and environmental changes, with so far unknown impacts on the benthic microbial communities of the continental shelves. In this study, we investigated the impact of contrasting sea ice cover on microbial community compositions in...
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Online Access: | https://epic.awi.de/id/eprint/57897/ https://epic.awi.de/id/eprint/57897/1/The%20Impact%20of%20Sea%20Ice%20Cover%20on%20Microbial%20Communities%20in%20Antarctic%20Shelf%20Sediments.pdf https://doi.org/10.3390/microorganisms11061572 https://hdl.handle.net/10013/epic.478339c1-798c-43f0-9a38-c219531dbc15 |
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ftawi:oai:epic.awi.de:57897 2024-09-15T17:48:34+00:00 The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments Baloza, Marwa Henkel, Susann Kasten, Sabine Holtappels, Moritz Molari, Massimiliano 2023-06-14 application/pdf https://epic.awi.de/id/eprint/57897/ https://epic.awi.de/id/eprint/57897/1/The%20Impact%20of%20Sea%20Ice%20Cover%20on%20Microbial%20Communities%20in%20Antarctic%20Shelf%20Sediments.pdf https://doi.org/10.3390/microorganisms11061572 https://hdl.handle.net/10013/epic.478339c1-798c-43f0-9a38-c219531dbc15 unknown MDPI https://epic.awi.de/id/eprint/57897/1/The%20Impact%20of%20Sea%20Ice%20Cover%20on%20Microbial%20Communities%20in%20Antarctic%20Shelf%20Sediments.pdf Baloza, M. , Henkel, S. , Kasten, S. , Holtappels, M. orcid:0000-0003-3682-1903 and Molari, M. (2023) The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments , Microorganisms, 11 (6), p. 1572 . doi:10.3390/microorganisms11061572 <https://doi.org/10.3390/microorganisms11061572> , hdl:10013/epic.478339c1-798c-43f0-9a38-c219531dbc15 EPIC3Microorganisms, MDPI, 11(6), pp. 1572-1572, ISSN: 2076-2607 Article isiRev 2023 ftawi https://doi.org/10.3390/microorganisms11061572 2024-08-12T14:06:28Z The area around the Antarctic Peninsula (AP) is facing rapid climatic and environmental changes, with so far unknown impacts on the benthic microbial communities of the continental shelves. In this study, we investigated the impact of contrasting sea ice cover on microbial community compositions in surface sediments from five stations along the eastern shelf of the AP using 16S ribosomal RNA (rRNA) gene sequencing. Redox conditions in sediments with long ice-free periods are characterized by a prevailing ferruginous zone, whereas a comparatively broad upper oxic zone is present at the heavily ice-covered station. Low ice cover stations were highly dominated by microbial communities of Desulfobacterota (mostly Sva1033, Desulfobacteria, and Desulfobulbia), Myxococcota, and Sva0485, whereas Gammaproteobacteria, Alphaproteobacteria, Bacteroidota, and NB1-j prevail at the heavy ice cover station. In the ferruginous zone, Sva1033 was the dominant member of Desulfuromonadales for all stations and, along with eleven other taxa, showed significant positive correlations with dissolved Fe concentrations, suggesting a significant role in iron reduction or an ecological relationship with iron reducers. Our results indicate that sea ice cover and its effect on organic carbon fluxes are the major drivers for changes in benthic microbial communities, favoring potential iron reducers at stations with increased organic matter fluxes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Microorganisms 11 6 1572 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The area around the Antarctic Peninsula (AP) is facing rapid climatic and environmental changes, with so far unknown impacts on the benthic microbial communities of the continental shelves. In this study, we investigated the impact of contrasting sea ice cover on microbial community compositions in surface sediments from five stations along the eastern shelf of the AP using 16S ribosomal RNA (rRNA) gene sequencing. Redox conditions in sediments with long ice-free periods are characterized by a prevailing ferruginous zone, whereas a comparatively broad upper oxic zone is present at the heavily ice-covered station. Low ice cover stations were highly dominated by microbial communities of Desulfobacterota (mostly Sva1033, Desulfobacteria, and Desulfobulbia), Myxococcota, and Sva0485, whereas Gammaproteobacteria, Alphaproteobacteria, Bacteroidota, and NB1-j prevail at the heavy ice cover station. In the ferruginous zone, Sva1033 was the dominant member of Desulfuromonadales for all stations and, along with eleven other taxa, showed significant positive correlations with dissolved Fe concentrations, suggesting a significant role in iron reduction or an ecological relationship with iron reducers. Our results indicate that sea ice cover and its effect on organic carbon fluxes are the major drivers for changes in benthic microbial communities, favoring potential iron reducers at stations with increased organic matter fluxes. |
format |
Article in Journal/Newspaper |
author |
Baloza, Marwa Henkel, Susann Kasten, Sabine Holtappels, Moritz Molari, Massimiliano |
spellingShingle |
Baloza, Marwa Henkel, Susann Kasten, Sabine Holtappels, Moritz Molari, Massimiliano The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
author_facet |
Baloza, Marwa Henkel, Susann Kasten, Sabine Holtappels, Moritz Molari, Massimiliano |
author_sort |
Baloza, Marwa |
title |
The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
title_short |
The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
title_full |
The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
title_fullStr |
The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
title_full_unstemmed |
The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments |
title_sort |
impact of sea ice cover on microbial communities in antarctic shelf sediments |
publisher |
MDPI |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/57897/ https://epic.awi.de/id/eprint/57897/1/The%20Impact%20of%20Sea%20Ice%20Cover%20on%20Microbial%20Communities%20in%20Antarctic%20Shelf%20Sediments.pdf https://doi.org/10.3390/microorganisms11061572 https://hdl.handle.net/10013/epic.478339c1-798c-43f0-9a38-c219531dbc15 |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice |
op_source |
EPIC3Microorganisms, MDPI, 11(6), pp. 1572-1572, ISSN: 2076-2607 |
op_relation |
https://epic.awi.de/id/eprint/57897/1/The%20Impact%20of%20Sea%20Ice%20Cover%20on%20Microbial%20Communities%20in%20Antarctic%20Shelf%20Sediments.pdf Baloza, M. , Henkel, S. , Kasten, S. , Holtappels, M. orcid:0000-0003-3682-1903 and Molari, M. (2023) The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments , Microorganisms, 11 (6), p. 1572 . doi:10.3390/microorganisms11061572 <https://doi.org/10.3390/microorganisms11061572> , hdl:10013/epic.478339c1-798c-43f0-9a38-c219531dbc15 |
op_doi |
https://doi.org/10.3390/microorganisms11061572 |
container_title |
Microorganisms |
container_volume |
11 |
container_issue |
6 |
container_start_page |
1572 |
_version_ |
1810289955536109568 |