Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula
Current warming in the Western Antarctic Peninsula (WAP) has multiple effects on the marine ecosystem, modifying the trophic web and the nutrient regime. In this study, the effect of decreased surface salinity on the marine microbial community as a consequence of freshening from nearby glaciers was...
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ftmdpi:oai:mdpi.com:/2076-2607/9/1/88/ 2023-08-20T04:00:41+02:00 Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula María Estrella Alcamán-Arias Sebastián Fuentes-Alburquenque Pablo Vergara-Barros Jerónimo Cifuentes-Anticevic Josefa Verdugo Martin Polz Laura Farías Carlos Pedrós-Alió Beatriz Díez agris 2021-01-01 application/pdf https://doi.org/10.3390/microorganisms9010088 EN eng Multidisciplinary Digital Publishing Institute Environmental Microbiology https://dx.doi.org/10.3390/microorganisms9010088 https://creativecommons.org/licenses/by/4.0/ Microorganisms; Volume 9; Issue 1; Pages: 88 glacial melting bacterial microbial community coastal Antarctic zone Text 2021 ftmdpi https://doi.org/10.3390/microorganisms9010088 2023-08-01T00:47:26Z Current warming in the Western Antarctic Peninsula (WAP) has multiple effects on the marine ecosystem, modifying the trophic web and the nutrient regime. In this study, the effect of decreased surface salinity on the marine microbial community as a consequence of freshening from nearby glaciers was investigated in Chile Bay, Greenwich Island, WAP. In the summer of 2016, samples were collected from glacier ice and transects along the bay for 16S rRNA gene sequencing, while in situ dilution experiments were conducted and analyzed using 16S rRNA gene sequencing and metatranscriptomic analysis. The results reveal that certain common seawater genera, such as Polaribacter, Pseudoalteromonas and HTCC2207, responded positively to decreased salinity in both the bay transect and experiments. The relative abundance of these bacteria slightly decreased, but their functional activity was maintained and increased the over time in the dilution experiments. However, while ice bacteria, such as Flavobacterium and Polaromonas, tolerated the increased salinity after mixing with seawater, their gene expression decreased considerably. We suggest that these bacterial taxa could be defined as sentinels of freshening events in the Antarctic coastal system. Furthermore, these results suggest that a significant portion of the microbial community is resilient and can adapt to disturbances, such as freshening due to the warming effect of climate change in Antarctica. Text Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island MDPI Open Access Publishing Antarctic Antarctic Peninsula Greenwich Greenwich Island ENVELOPE(-59.783,-59.783,-62.517,-62.517) The Antarctic Microorganisms 9 1 88 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
glacial melting bacterial microbial community coastal Antarctic zone |
spellingShingle |
glacial melting bacterial microbial community coastal Antarctic zone María Estrella Alcamán-Arias Sebastián Fuentes-Alburquenque Pablo Vergara-Barros Jerónimo Cifuentes-Anticevic Josefa Verdugo Martin Polz Laura Farías Carlos Pedrós-Alió Beatriz Díez Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
topic_facet |
glacial melting bacterial microbial community coastal Antarctic zone |
description |
Current warming in the Western Antarctic Peninsula (WAP) has multiple effects on the marine ecosystem, modifying the trophic web and the nutrient regime. In this study, the effect of decreased surface salinity on the marine microbial community as a consequence of freshening from nearby glaciers was investigated in Chile Bay, Greenwich Island, WAP. In the summer of 2016, samples were collected from glacier ice and transects along the bay for 16S rRNA gene sequencing, while in situ dilution experiments were conducted and analyzed using 16S rRNA gene sequencing and metatranscriptomic analysis. The results reveal that certain common seawater genera, such as Polaribacter, Pseudoalteromonas and HTCC2207, responded positively to decreased salinity in both the bay transect and experiments. The relative abundance of these bacteria slightly decreased, but their functional activity was maintained and increased the over time in the dilution experiments. However, while ice bacteria, such as Flavobacterium and Polaromonas, tolerated the increased salinity after mixing with seawater, their gene expression decreased considerably. We suggest that these bacterial taxa could be defined as sentinels of freshening events in the Antarctic coastal system. Furthermore, these results suggest that a significant portion of the microbial community is resilient and can adapt to disturbances, such as freshening due to the warming effect of climate change in Antarctica. |
format |
Text |
author |
María Estrella Alcamán-Arias Sebastián Fuentes-Alburquenque Pablo Vergara-Barros Jerónimo Cifuentes-Anticevic Josefa Verdugo Martin Polz Laura Farías Carlos Pedrós-Alió Beatriz Díez |
author_facet |
María Estrella Alcamán-Arias Sebastián Fuentes-Alburquenque Pablo Vergara-Barros Jerónimo Cifuentes-Anticevic Josefa Verdugo Martin Polz Laura Farías Carlos Pedrós-Alió Beatriz Díez |
author_sort |
María Estrella Alcamán-Arias |
title |
Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
title_short |
Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
title_full |
Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
title_fullStr |
Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
title_full_unstemmed |
Coastal Bacterial Community Response to Glacier Melting in the Western Antarctic Peninsula |
title_sort |
coastal bacterial community response to glacier melting in the western antarctic peninsula |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/microorganisms9010088 |
op_coverage |
agris |
long_lat |
ENVELOPE(-59.783,-59.783,-62.517,-62.517) |
geographic |
Antarctic Antarctic Peninsula Greenwich Greenwich Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Greenwich Greenwich Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island |
op_source |
Microorganisms; Volume 9; Issue 1; Pages: 88 |
op_relation |
Environmental Microbiology https://dx.doi.org/10.3390/microorganisms9010088 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/microorganisms9010088 |
container_title |
Microorganisms |
container_volume |
9 |
container_issue |
1 |
container_start_page |
88 |
_version_ |
1774719743218941952 |