Glacier clear ice bands indicate englacial channel microbial distribution
Distant glacial areas are interconnected by a complex system of fractures and water channels which run in the glacier interior and characterize the englacial realm. Water can slowly freeze in these channels where the slow freezing excludes air bubbles giving the ice a clear aspect. This ice is uplif...
Published in: | Journal of Glaciology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://hdl.handle.net/1983/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://research-information.bris.ac.uk/en/publications/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://doi.org/10.1017/jog.2021.30 https://research-information.bris.ac.uk/ws/files/286406252/Full_text_PDF_final_published_version_.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/d6bd2638-c8da-4a44-9669-8c52f237f3b4 2024-02-04T10:01:42+01:00 Glacier clear ice bands indicate englacial channel microbial distribution Varliero, Gilda Holland, Alexandra Barker, Gary L A Yallop, Marian L Fountain, Andrew G Anesio, Alexandre 2021-10-22 application/pdf https://hdl.handle.net/1983/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://research-information.bris.ac.uk/en/publications/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://doi.org/10.1017/jog.2021.30 https://research-information.bris.ac.uk/ws/files/286406252/Full_text_PDF_final_published_version_.pdf eng eng info:eu-repo/semantics/openAccess Varliero , G , Holland , A , Barker , G L A , Yallop , M L , Fountain , A G & Anesio , A 2021 , ' Glacier clear ice bands indicate englacial channel microbial distribution ' , Journal of Glaciology , vol. 67 , no. 265 , pp. 811-823 . https://doi.org/10.1017/jog.2021.30 article 2021 ftubristolcris https://doi.org/10.1017/jog.2021.30 2024-01-11T23:45:51Z Distant glacial areas are interconnected by a complex system of fractures and water channels which run in the glacier interior and characterize the englacial realm. Water can slowly freeze in these channels where the slow freezing excludes air bubbles giving the ice a clear aspect. This ice is uplifted to the surface ablation zone by glacial movements and can therefore be observed in the form of clear surface ice bands. We employed an indirect method to sample englacial water by coring these ice bands. We were able, for the first time, to compare microbial communities sampled from clear (i.e. frozen englacial water bands) and cloudy ice (i.e. meteoric ice) through 16S rRNA gene sequencing. Although microbial communities were primarily shaped and structured by their spatial distribution on the glacier, ice type was a clear secondary factor. One area of the glacier, in particular, presented significant microbial community clear/cloudy ice differences. Although the clear ice and supraglacial communities showed typical cold-adapted glacial communities, the cloudy ice had a less defined glacial community and ubiquitous environmental organisms. These results highlight the role of englacial channels in the microbial dispersion within the glacier and, possibly, in the shaping of glacial microbial communities. Article in Journal/Newspaper Journal of Glaciology University of Bristol: Bristol Research Journal of Glaciology 67 265 811 823 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Distant glacial areas are interconnected by a complex system of fractures and water channels which run in the glacier interior and characterize the englacial realm. Water can slowly freeze in these channels where the slow freezing excludes air bubbles giving the ice a clear aspect. This ice is uplifted to the surface ablation zone by glacial movements and can therefore be observed in the form of clear surface ice bands. We employed an indirect method to sample englacial water by coring these ice bands. We were able, for the first time, to compare microbial communities sampled from clear (i.e. frozen englacial water bands) and cloudy ice (i.e. meteoric ice) through 16S rRNA gene sequencing. Although microbial communities were primarily shaped and structured by their spatial distribution on the glacier, ice type was a clear secondary factor. One area of the glacier, in particular, presented significant microbial community clear/cloudy ice differences. Although the clear ice and supraglacial communities showed typical cold-adapted glacial communities, the cloudy ice had a less defined glacial community and ubiquitous environmental organisms. These results highlight the role of englacial channels in the microbial dispersion within the glacier and, possibly, in the shaping of glacial microbial communities. |
format |
Article in Journal/Newspaper |
author |
Varliero, Gilda Holland, Alexandra Barker, Gary L A Yallop, Marian L Fountain, Andrew G Anesio, Alexandre |
spellingShingle |
Varliero, Gilda Holland, Alexandra Barker, Gary L A Yallop, Marian L Fountain, Andrew G Anesio, Alexandre Glacier clear ice bands indicate englacial channel microbial distribution |
author_facet |
Varliero, Gilda Holland, Alexandra Barker, Gary L A Yallop, Marian L Fountain, Andrew G Anesio, Alexandre |
author_sort |
Varliero, Gilda |
title |
Glacier clear ice bands indicate englacial channel microbial distribution |
title_short |
Glacier clear ice bands indicate englacial channel microbial distribution |
title_full |
Glacier clear ice bands indicate englacial channel microbial distribution |
title_fullStr |
Glacier clear ice bands indicate englacial channel microbial distribution |
title_full_unstemmed |
Glacier clear ice bands indicate englacial channel microbial distribution |
title_sort |
glacier clear ice bands indicate englacial channel microbial distribution |
publishDate |
2021 |
url |
https://hdl.handle.net/1983/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://research-information.bris.ac.uk/en/publications/d6bd2638-c8da-4a44-9669-8c52f237f3b4 https://doi.org/10.1017/jog.2021.30 https://research-information.bris.ac.uk/ws/files/286406252/Full_text_PDF_final_published_version_.pdf |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Varliero , G , Holland , A , Barker , G L A , Yallop , M L , Fountain , A G & Anesio , A 2021 , ' Glacier clear ice bands indicate englacial channel microbial distribution ' , Journal of Glaciology , vol. 67 , no. 265 , pp. 811-823 . https://doi.org/10.1017/jog.2021.30 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/jog.2021.30 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
265 |
container_start_page |
811 |
op_container_end_page |
823 |
_version_ |
1789967837418225664 |