Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet
Current research into bacterial dynamics on the Greenland Ice Sheet (GrIS) is biased toward cryoconite holes, despite this habitat covering less than 8% of the ablation (melt) zone surface. In contrast, the expansive surface ice, which supports wide-spread Streptophyte micro-algal blooms thought to...
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ftzenodo:oai:zenodo.org:3269198 2023-06-06T11:53:52+02:00 Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet Nicholes, Miranda Jane Williamson, Christopher James Tranter, Martyn Holland, Alexandra Poniecka, Ewa Yallop, Marian Louise The Black & Bloom Group Anesio, Alexandre 2019-07-03 https://zenodo.org/record/3269198 https://doi.org/10.3389/fmicb.2019.01366 eng eng info:eu-repo/grantAgreement/EC/H2020/675546/ https://zenodo.org/communities/microarctic https://zenodo.org/record/3269198 https://doi.org/10.3389/fmicb.2019.01366 oai:zenodo.org:3269198 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Greenland ice sheet bacterial production bacterial abundance glacier algae info:eu-repo/semantics/article publication-article 2019 ftzenodo https://doi.org/10.3389/fmicb.2019.01366 2023-04-13T21:50:50Z Current research into bacterial dynamics on the Greenland Ice Sheet (GrIS) is biased toward cryoconite holes, despite this habitat covering less than 8% of the ablation (melt) zone surface. In contrast, the expansive surface ice, which supports wide-spread Streptophyte micro-algal blooms thought to enhance surface melt, has been relatively neglected. This study aims to understand variability in bacterial abundance and production across an ablation season on the GrIS, in relation to micro-algal bloom dynamics. Bacterial abundance reached 3.3 ± 0.3 × 105 cells ml−1 in surface ice and was significantly linearly related to algal abundances during the middle and late ablation periods (R2 = 0.62, p < 0.05; R2 = 0.78, p < 0.001). Bacterial production (BP) of 0.03–0.6 μg C L−1 h−1was observed in surface ice and increased in concert with glacier algal abundances, indicating that heterotrophic bacteria consume algal-derived dissolved organic carbon. However, BP remained at least 28 times lower than net primary production, indicating inefficient carbon cycling by heterotrophic bacteria and net accumulation of carbon in surface ice throughout the ablation season. Across the supraglacial environment, cryoconite sediment BP was at least four times greater than surface ice, confirming that cryoconite holes are the true “hot spots” of heterotrophic bacterial activity. Article in Journal/Newspaper glacier Greenland Ice Sheet Zenodo Greenland Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
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op_collection_id |
ftzenodo |
language |
English |
topic |
Greenland ice sheet bacterial production bacterial abundance glacier algae |
spellingShingle |
Greenland ice sheet bacterial production bacterial abundance glacier algae Nicholes, Miranda Jane Williamson, Christopher James Tranter, Martyn Holland, Alexandra Poniecka, Ewa Yallop, Marian Louise The Black & Bloom Group Anesio, Alexandre Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
topic_facet |
Greenland ice sheet bacterial production bacterial abundance glacier algae |
description |
Current research into bacterial dynamics on the Greenland Ice Sheet (GrIS) is biased toward cryoconite holes, despite this habitat covering less than 8% of the ablation (melt) zone surface. In contrast, the expansive surface ice, which supports wide-spread Streptophyte micro-algal blooms thought to enhance surface melt, has been relatively neglected. This study aims to understand variability in bacterial abundance and production across an ablation season on the GrIS, in relation to micro-algal bloom dynamics. Bacterial abundance reached 3.3 ± 0.3 × 105 cells ml−1 in surface ice and was significantly linearly related to algal abundances during the middle and late ablation periods (R2 = 0.62, p < 0.05; R2 = 0.78, p < 0.001). Bacterial production (BP) of 0.03–0.6 μg C L−1 h−1was observed in surface ice and increased in concert with glacier algal abundances, indicating that heterotrophic bacteria consume algal-derived dissolved organic carbon. However, BP remained at least 28 times lower than net primary production, indicating inefficient carbon cycling by heterotrophic bacteria and net accumulation of carbon in surface ice throughout the ablation season. Across the supraglacial environment, cryoconite sediment BP was at least four times greater than surface ice, confirming that cryoconite holes are the true “hot spots” of heterotrophic bacterial activity. |
format |
Article in Journal/Newspaper |
author |
Nicholes, Miranda Jane Williamson, Christopher James Tranter, Martyn Holland, Alexandra Poniecka, Ewa Yallop, Marian Louise The Black & Bloom Group Anesio, Alexandre |
author_facet |
Nicholes, Miranda Jane Williamson, Christopher James Tranter, Martyn Holland, Alexandra Poniecka, Ewa Yallop, Marian Louise The Black & Bloom Group Anesio, Alexandre |
author_sort |
Nicholes, Miranda Jane |
title |
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
title_short |
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
title_full |
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
title_fullStr |
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
title_full_unstemmed |
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet |
title_sort |
bacterial dynamics in supraglacial habitats of the greenland ice sheet |
publishDate |
2019 |
url |
https://zenodo.org/record/3269198 https://doi.org/10.3389/fmicb.2019.01366 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/675546/ https://zenodo.org/communities/microarctic https://zenodo.org/record/3269198 https://doi.org/10.3389/fmicb.2019.01366 oai:zenodo.org:3269198 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3389/fmicb.2019.01366 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
_version_ |
1767960224494256128 |