Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica
Abstract Fildes Peninsula, on King George Island, has been greatly influenced by recent rapid climate warming. Lakes are pervasive features of Fildes Peninsula landscapes, some of which are used as water sources for Antarctic stations. We studied seven Fildes Peninsula lakes to explore differences a...
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/s0954102023000068 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000068 |
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crcambridgeupr:10.1017/s0954102023000068 2024-06-23T07:47:44+00:00 Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica Bertoglio, Florencia Piccini, Claudia Urrutia, Roberto Antoniades, Dermot Institut chilien de l'Antarctique 2023 http://dx.doi.org/10.1017/s0954102023000068 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000068 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Antarctic Science volume 35, issue 2, page 89-102 ISSN 0954-1020 1365-2079 journal-article 2023 crcambridgeupr https://doi.org/10.1017/s0954102023000068 2024-06-12T04:03:18Z Abstract Fildes Peninsula, on King George Island, has been greatly influenced by recent rapid climate warming. Lakes are pervasive features of Fildes Peninsula landscapes, some of which are used as water sources for Antarctic stations. We studied seven Fildes Peninsula lakes to explore differences among lakes and between seasons in phytoplankton and bacterioplankton communities. We measured environmental variables, analysed pigments using high-performance liquid chromatography and examined bacterial DNA through high-throughput sequencing of the 16S rRNA gene. The main driver structuring microbial communities was the season (i.e. spring vs autumn). Chlorophyceae were the dominant phytoplankton group in all lakes and both seasons. Indicator bacteria for each season were identified, including Flavobacterium , Polaromonas and Oxalobacteraceae as indicators of spring conditions under thick ice, whereas Frankiales and Verrucomicrobia were indicator species of autumn following the ice-free summer. The indicator species for spring are generally observed in oligotrophic conditions, whereas many of the autumn indicators are commonly found in soils. There were lesser between-lake differences in microbial communities in autumn, at the end of the open-water period, than in spring at the end of the ice-covered period. This study will act as the basis for future assessments of changes in aquatic microbial communities. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica King George Island Cambridge University Press Antarctic Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) King George Island Antarctic Science 35 2 89 102 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Fildes Peninsula, on King George Island, has been greatly influenced by recent rapid climate warming. Lakes are pervasive features of Fildes Peninsula landscapes, some of which are used as water sources for Antarctic stations. We studied seven Fildes Peninsula lakes to explore differences among lakes and between seasons in phytoplankton and bacterioplankton communities. We measured environmental variables, analysed pigments using high-performance liquid chromatography and examined bacterial DNA through high-throughput sequencing of the 16S rRNA gene. The main driver structuring microbial communities was the season (i.e. spring vs autumn). Chlorophyceae were the dominant phytoplankton group in all lakes and both seasons. Indicator bacteria for each season were identified, including Flavobacterium , Polaromonas and Oxalobacteraceae as indicators of spring conditions under thick ice, whereas Frankiales and Verrucomicrobia were indicator species of autumn following the ice-free summer. The indicator species for spring are generally observed in oligotrophic conditions, whereas many of the autumn indicators are commonly found in soils. There were lesser between-lake differences in microbial communities in autumn, at the end of the open-water period, than in spring at the end of the ice-covered period. This study will act as the basis for future assessments of changes in aquatic microbial communities. |
author2 |
Institut chilien de l'Antarctique |
format |
Article in Journal/Newspaper |
author |
Bertoglio, Florencia Piccini, Claudia Urrutia, Roberto Antoniades, Dermot |
spellingShingle |
Bertoglio, Florencia Piccini, Claudia Urrutia, Roberto Antoniades, Dermot Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
author_facet |
Bertoglio, Florencia Piccini, Claudia Urrutia, Roberto Antoniades, Dermot |
author_sort |
Bertoglio, Florencia |
title |
Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
title_short |
Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
title_full |
Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
title_fullStr |
Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
title_full_unstemmed |
Seasonal shifts in microbial diversity in the lakes of Fildes Peninsula, King George Island, Maritime Antarctica |
title_sort |
seasonal shifts in microbial diversity in the lakes of fildes peninsula, king george island, maritime antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/s0954102023000068 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102023000068 |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic Fildes Fildes peninsula King George Island |
geographic_facet |
Antarctic Fildes Fildes peninsula King George Island |
genre |
Antarc* Antarctic Antarctic Science Antarctica King George Island |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica King George Island |
op_source |
Antarctic Science volume 35, issue 2, page 89-102 ISSN 0954-1020 1365-2079 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/s0954102023000068 |
container_title |
Antarctic Science |
container_volume |
35 |
container_issue |
2 |
container_start_page |
89 |
op_container_end_page |
102 |
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1802651896154947584 |