Glacier clear ice bands indicate englacial channel microbial distribution
Abstract 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...
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Online Access: | http://dx.doi.org/10.1017/jog.2021.30 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000307 |
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crcambridgeupr:10.1017/jog.2021.30 2024-10-06T13:50:17+00:00 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 M. 2021 http://dx.doi.org/10.1017/jog.2021.30 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000307 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 67, issue 265, page 811-823 ISSN 0022-1430 1727-5652 journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.30 2024-09-11T04:04:13Z Abstract 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 Cambridge University Press Journal of Glaciology 67 265 811 823 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract 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 M. |
spellingShingle |
Varliero, Gilda Holland, Alexandra Barker, Gary L. A. Yallop, Marian L. Fountain, Andrew G. Anesio, Alexandre M. 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 M. |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.30 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000307 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 67, issue 265, page 811-823 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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_ |
1812178397740138496 |