Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica
Ultra-oligotrophic Lake Untersee is among the largest and deepest surface lakes of Central Queen Maud Land in East Antarctica. It is dammed at its north end by the Anuchin Glacier and the ice-cover dynamics are controlled by sublimation — not melt — as the dominating ablation process and therefore s...
Published in: | Frontiers in Microbiology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2019
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fmicb.2019.01019 https://doaj.org/article/4084254547f14fa8ba4dc742bad96d5e |
id |
ftdoajarticles:oai:doaj.org/article:4084254547f14fa8ba4dc742bad96d5e |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:4084254547f14fa8ba4dc742bad96d5e 2023-05-15T14:01:23+02:00 Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica Klemens Weisleitner Alexandra Perras Christine Moissl-Eichinger Dale T. Andersen Birgit Sattler 2019-05-01T00:00:00Z https://doi.org/10.3389/fmicb.2019.01019 https://doaj.org/article/4084254547f14fa8ba4dc742bad96d5e EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmicb.2019.01019/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2019.01019 https://doaj.org/article/4084254547f14fa8ba4dc742bad96d5e Frontiers in Microbiology, Vol 10 (2019) Lake Untersee 16S rRNA Antarctica Anuchin Glacier cryoconite holes transfer of biota Microbiology QR1-502 article 2019 ftdoajarticles https://doi.org/10.3389/fmicb.2019.01019 2022-12-31T13:28:16Z Ultra-oligotrophic Lake Untersee is among the largest and deepest surface lakes of Central Queen Maud Land in East Antarctica. It is dammed at its north end by the Anuchin Glacier and the ice-cover dynamics are controlled by sublimation — not melt — as the dominating ablation process and therefore surface melt during austral summer does not provide significant amounts of water for recharge compared to subsurface melt of the Anuchin Glacier. Several studies have already described the structure and function of the microbial communities within the water column and benthic environments of Lake Untersee, however, thus far there have been no studies that examine the linkages between the lake ecosystem with that of the surrounding soils or the Anuchin Glacier. The glacier may also play an important role as a major contributor of nutrients and biota into the lake ecosystem. Based on microbial 16S rRNA amplicon sequencing, we showed that the dominant bacterial signatures in Lake Untersee, the Anuchin Glacier and its surrounding soils were affiliated with Actinobacteria, Bacteroidetes, Cyanobacteria, Firmicutes, and Proteobacteria. Aerosol and local soil depositions on the glacier surface resulted in distinct microbial communities developing in glacier ice and cryoconite holes. Based on a source tracking algorithm, we found that cryoconite microbial assemblages were a potential source of organisms, explaining up to 36% of benthic microbial mat communities in the lake. However, the major biotic sources for the lake ecosystem are still unknown, illustrating the possible importance of englacial and subglacial zones. The Anuchin Glacier may be considered as a vector in a biological sense for the bacterial colonization of the perennially ice-covered Lake Untersee. However, despite a thick perennial ice cover, observed “lift-off” microbial mats escaping the lake make a bidirectional transfer of biota plausible. Hence, there is an exchange of biota between Lake Untersee and connective habitats possible despite the apparent ... Article in Journal/Newspaper Antarc* Antarctica Anuchin Glacier East Antarctica Queen Maud Land Directory of Open Access Journals: DOAJ Articles East Antarctica Austral Untersee ENVELOPE(13.467,13.467,-71.350,-71.350) Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Anuchin Glacier ENVELOPE(13.517,13.517,-71.283,-71.283) Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Lake Untersee 16S rRNA Antarctica Anuchin Glacier cryoconite holes transfer of biota Microbiology QR1-502 |
spellingShingle |
Lake Untersee 16S rRNA Antarctica Anuchin Glacier cryoconite holes transfer of biota Microbiology QR1-502 Klemens Weisleitner Alexandra Perras Christine Moissl-Eichinger Dale T. Andersen Birgit Sattler Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
topic_facet |
Lake Untersee 16S rRNA Antarctica Anuchin Glacier cryoconite holes transfer of biota Microbiology QR1-502 |
description |
Ultra-oligotrophic Lake Untersee is among the largest and deepest surface lakes of Central Queen Maud Land in East Antarctica. It is dammed at its north end by the Anuchin Glacier and the ice-cover dynamics are controlled by sublimation — not melt — as the dominating ablation process and therefore surface melt during austral summer does not provide significant amounts of water for recharge compared to subsurface melt of the Anuchin Glacier. Several studies have already described the structure and function of the microbial communities within the water column and benthic environments of Lake Untersee, however, thus far there have been no studies that examine the linkages between the lake ecosystem with that of the surrounding soils or the Anuchin Glacier. The glacier may also play an important role as a major contributor of nutrients and biota into the lake ecosystem. Based on microbial 16S rRNA amplicon sequencing, we showed that the dominant bacterial signatures in Lake Untersee, the Anuchin Glacier and its surrounding soils were affiliated with Actinobacteria, Bacteroidetes, Cyanobacteria, Firmicutes, and Proteobacteria. Aerosol and local soil depositions on the glacier surface resulted in distinct microbial communities developing in glacier ice and cryoconite holes. Based on a source tracking algorithm, we found that cryoconite microbial assemblages were a potential source of organisms, explaining up to 36% of benthic microbial mat communities in the lake. However, the major biotic sources for the lake ecosystem are still unknown, illustrating the possible importance of englacial and subglacial zones. The Anuchin Glacier may be considered as a vector in a biological sense for the bacterial colonization of the perennially ice-covered Lake Untersee. However, despite a thick perennial ice cover, observed “lift-off” microbial mats escaping the lake make a bidirectional transfer of biota plausible. Hence, there is an exchange of biota between Lake Untersee and connective habitats possible despite the apparent ... |
format |
Article in Journal/Newspaper |
author |
Klemens Weisleitner Alexandra Perras Christine Moissl-Eichinger Dale T. Andersen Birgit Sattler |
author_facet |
Klemens Weisleitner Alexandra Perras Christine Moissl-Eichinger Dale T. Andersen Birgit Sattler |
author_sort |
Klemens Weisleitner |
title |
Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
title_short |
Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
title_full |
Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
title_fullStr |
Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
title_full_unstemmed |
Source Environments of the Microbiome in Perennially Ice-Covered Lake Untersee, Antarctica |
title_sort |
source environments of the microbiome in perennially ice-covered lake untersee, antarctica |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmicb.2019.01019 https://doaj.org/article/4084254547f14fa8ba4dc742bad96d5e |
long_lat |
ENVELOPE(13.467,13.467,-71.350,-71.350) ENVELOPE(12.000,12.000,-72.500,-72.500) ENVELOPE(13.517,13.517,-71.283,-71.283) |
geographic |
East Antarctica Austral Untersee Queen Maud Land Anuchin Glacier |
geographic_facet |
East Antarctica Austral Untersee Queen Maud Land Anuchin Glacier |
genre |
Antarc* Antarctica Anuchin Glacier East Antarctica Queen Maud Land |
genre_facet |
Antarc* Antarctica Anuchin Glacier East Antarctica Queen Maud Land |
op_source |
Frontiers in Microbiology, Vol 10 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmicb.2019.01019/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2019.01019 https://doaj.org/article/4084254547f14fa8ba4dc742bad96d5e |
op_doi |
https://doi.org/10.3389/fmicb.2019.01019 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
_version_ |
1766271192051744768 |