Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice
Bacterial communities in Arctic sea ice play an important role in the regulation of nutrient and energy dynamics in the Arctic Ocean. Sea ice has vertical gradients in temperature, brine salinity and volume, and light and UV levels. Multiyear ice (MYI) has at least two distinct ice layers: old fresh...
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WILEY-BLACKWELL PUBLISHING
2014
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Online Access: | https://epic.awi.de/id/eprint/36795/ https://hdl.handle.net/10013/epic.45127 |
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ftawi:oai:epic.awi.de:36795 2024-09-15T17:50:57+00:00 Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice Hatam, Ido Charchuk, Rhianna Lange, Benjamin Beckers, Justin Haas, Christian Lanoil, Brian 2014-10 https://epic.awi.de/id/eprint/36795/ https://hdl.handle.net/10013/epic.45127 unknown WILEY-BLACKWELL PUBLISHING Hatam, I. , Charchuk, R. , Lange, B. , Beckers, J. , Haas, C. and Lanoil, B. (2014) Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice , FEMS Microbiology Ecology, pp. 1-11 . doi:10.1111/1574-6941.12377 <https://doi.org/10.1111/1574-6941.12377> , hdl:10013/epic.45127 EPIC3FEMS Microbiology Ecology, WILEY-BLACKWELL PUBLISHING, pp. 1-11, ISSN: 1574-6941 Article peerRev 2014 ftawi https://doi.org/10.1111/1574-6941.12377 2024-06-24T04:11:05Z Bacterial communities in Arctic sea ice play an important role in the regulation of nutrient and energy dynamics in the Arctic Ocean. Sea ice has vertical gradients in temperature, brine salinity and volume, and light and UV levels. Multiyear ice (MYI) has at least two distinct ice layers: old fresh ice with limited permeability, and new saline ice, and may also include a surface melt pond layer. Here, we determine whether bacterial communities (1) differ with ice depth due to strong physical and chemical gradients, (2) are relatively homogenous within a layer, but differ between layers, or (3) do not vary with ice depth. Cores of MYI off northern Ellesmere Island, NU, Canada, were subsectioned in 30-cm intervals, and the bacterial assemblage structure was characterized using 16S rRNA gene pyrotag sequencing. Assemblages clustered into three distinct groups: top (0-30 cm); middle (30-150 cm); and bottom (150-236 cm). These layers correspond to the occurrence of refrozen melt pond ice, at least 2-year-old ice, and newly grown first-year ice at the bottom of the ice sheet, respectively. Thus, MYI houses multiple distinct bacterial assemblages, and in situ conditions appear to play a less important role in structuring microbial assemblages than the age or conditions of the ice at the time of formation. Article in Journal/Newspaper Arctic Arctic Ocean Ellesmere Island Ice Sheet Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) FEMS Microbiology Ecology 90 1 115 125 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Bacterial communities in Arctic sea ice play an important role in the regulation of nutrient and energy dynamics in the Arctic Ocean. Sea ice has vertical gradients in temperature, brine salinity and volume, and light and UV levels. Multiyear ice (MYI) has at least two distinct ice layers: old fresh ice with limited permeability, and new saline ice, and may also include a surface melt pond layer. Here, we determine whether bacterial communities (1) differ with ice depth due to strong physical and chemical gradients, (2) are relatively homogenous within a layer, but differ between layers, or (3) do not vary with ice depth. Cores of MYI off northern Ellesmere Island, NU, Canada, were subsectioned in 30-cm intervals, and the bacterial assemblage structure was characterized using 16S rRNA gene pyrotag sequencing. Assemblages clustered into three distinct groups: top (0-30 cm); middle (30-150 cm); and bottom (150-236 cm). These layers correspond to the occurrence of refrozen melt pond ice, at least 2-year-old ice, and newly grown first-year ice at the bottom of the ice sheet, respectively. Thus, MYI houses multiple distinct bacterial assemblages, and in situ conditions appear to play a less important role in structuring microbial assemblages than the age or conditions of the ice at the time of formation. |
format |
Article in Journal/Newspaper |
author |
Hatam, Ido Charchuk, Rhianna Lange, Benjamin Beckers, Justin Haas, Christian Lanoil, Brian |
spellingShingle |
Hatam, Ido Charchuk, Rhianna Lange, Benjamin Beckers, Justin Haas, Christian Lanoil, Brian Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
author_facet |
Hatam, Ido Charchuk, Rhianna Lange, Benjamin Beckers, Justin Haas, Christian Lanoil, Brian |
author_sort |
Hatam, Ido |
title |
Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
title_short |
Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
title_full |
Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
title_fullStr |
Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
title_full_unstemmed |
Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice |
title_sort |
distinct bacterial assemblages reside at different depths in arctic multiyear sea ice |
publisher |
WILEY-BLACKWELL PUBLISHING |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/36795/ https://hdl.handle.net/10013/epic.45127 |
genre |
Arctic Arctic Ocean Ellesmere Island Ice Sheet Sea ice |
genre_facet |
Arctic Arctic Ocean Ellesmere Island Ice Sheet Sea ice |
op_source |
EPIC3FEMS Microbiology Ecology, WILEY-BLACKWELL PUBLISHING, pp. 1-11, ISSN: 1574-6941 |
op_relation |
Hatam, I. , Charchuk, R. , Lange, B. , Beckers, J. , Haas, C. and Lanoil, B. (2014) Distinct bacterial assemblages reside at different depths in Arctic multiyear sea ice , FEMS Microbiology Ecology, pp. 1-11 . doi:10.1111/1574-6941.12377 <https://doi.org/10.1111/1574-6941.12377> , hdl:10013/epic.45127 |
op_doi |
https://doi.org/10.1111/1574-6941.12377 |
container_title |
FEMS Microbiology Ecology |
container_volume |
90 |
container_issue |
1 |
container_start_page |
115 |
op_container_end_page |
125 |
_version_ |
1810292753220763648 |