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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ftdoajarticles:oai:doaj.org/article:3c1aab790e2a48c7ac1b949b213b511a 2023-05-15T13:55:36+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 2021-01-01T00:00:00Z https://doi.org/10.3390/microorganisms9010088 https://doaj.org/article/3c1aab790e2a48c7ac1b949b213b511a EN eng MDPI AG https://www.mdpi.com/2076-2607/9/1/88 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms9010088 2076-2607 https://doaj.org/article/3c1aab790e2a48c7ac1b949b213b511a Microorganisms, Vol 9, Iss 88, p 88 (2021) glacial melting bacterial microbial community coastal Antarctic zone Biology (General) QH301-705.5 article 2021 ftdoajarticles https://doi.org/10.3390/microorganisms9010088 2022-12-31T15:24:46Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Greenwich Greenwich Island ENVELOPE(-59.783,-59.783,-62.517,-62.517) Microorganisms 9 1 88 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial melting bacterial microbial community coastal Antarctic zone Biology (General) QH301-705.5 |
spellingShingle |
glacial melting bacterial microbial community coastal Antarctic zone Biology (General) QH301-705.5 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 Biology (General) QH301-705.5 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/microorganisms9010088 https://doaj.org/article/3c1aab790e2a48c7ac1b949b213b511a |
long_lat |
ENVELOPE(-59.783,-59.783,-62.517,-62.517) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Greenwich Greenwich Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Greenwich Greenwich Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island |
op_source |
Microorganisms, Vol 9, Iss 88, p 88 (2021) |
op_relation |
https://www.mdpi.com/2076-2607/9/1/88 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms9010088 2076-2607 https://doaj.org/article/3c1aab790e2a48c7ac1b949b213b511a |
op_doi |
https://doi.org/10.3390/microorganisms9010088 |
container_title |
Microorganisms |
container_volume |
9 |
container_issue |
1 |
container_start_page |
88 |
_version_ |
1766262355334791168 |