Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N.
Larger volumes of sea ice have been thawing in the Central Arctic Ocean (CAO) during the last decades than during the past 800,000 years. Brackish brine (fed by meltwater inside the ice) is an expanding sympagic habitat in summer all over the CAO. We report for the first time the structure of bacter...
Published in: | The ISME Journal |
---|---|
Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Silverchair Information Systems
2019
|
Subjects: | |
Online Access: | https://doi.org/10.1038/s41396-018-0268-9 https://pubmed.ncbi.nlm.nih.gov/30228379 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331608/ |
id |
ftpubmed:30228379 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:30228379 2024-09-15T17:48:08+00:00 Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. Fernández-Gómez, Beatriz Díez, Beatriz Polz, Martin F Arroyo, José Ignacio Alfaro, Fernando D Marchandon, Germán Sanhueza, Cynthia Farías, Laura Trefault, Nicole Marquet, Pablo A Molina-Montenegro, Marco A Sylvander, Peter Snoeijs-Leijonmalm, Pauline 2019-02 https://doi.org/10.1038/s41396-018-0268-9 https://pubmed.ncbi.nlm.nih.gov/30228379 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331608/ eng eng Silverchair Information Systems https://doi.org/10.1038/s41396-018-0268-9 https://pubmed.ncbi.nlm.nih.gov/30228379 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331608/ ISME J ISSN:1751-7370 Volume:13 Issue:2 Journal Article Research Support, Non-U.S. Gov't 2019 ftpubmed https://doi.org/10.1038/s41396-018-0268-9 2024-07-19T16:02:00Z Larger volumes of sea ice have been thawing in the Central Arctic Ocean (CAO) during the last decades than during the past 800,000 years. Brackish brine (fed by meltwater inside the ice) is an expanding sympagic habitat in summer all over the CAO. We report for the first time the structure of bacterial communities in this brine. They are composed of psychrophilic extremophiles, many of them related to phylotypes known from Arctic and Antarctic regions. Community structure displayed strong habitat segregation between brackish ice brine (IB; salinity 2.4-9.6) and immediate sub-ice seawater (SW; salinity 33.3-34.9), expressed at all taxonomic levels (class to genus), by dominant phylotypes as well as by the rare biosphere, and with specialists dominating IB and generalists SW. The dominant phylotypes in IB were related to Candidatus Aquiluna and Flavobacterium, those in SW to Balneatrix and ZD0405, and those shared between the habitats to Halomonas, Polaribacter and Shewanella. A meta-analysis for the oligotrophic CAO showed a pattern with Flavobacteriia dominating in melt ponds, Flavobacteriia and Gammaproteobacteria in solid ice cores, Flavobacteriia, Gamma- and Betaproteobacteria, and Actinobacteria in brine, and Alphaproteobacteria in SW. Based on our results, we expect that the roles of Actinobacteria and Betaproteobacteria in the CAO will increase with global warming owing to the increased production of meltwater in summer. IB contained three times more phylotypes than SW and may act as an insurance reservoir for bacterial diversity that can act as a recruitment base when environmental conditions change. Article in Journal/Newspaper Antarc* Antarctic Arctic Ocean Global warming Sea ice PubMed Central (PMC) The ISME Journal 13 2 316 333 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
description |
Larger volumes of sea ice have been thawing in the Central Arctic Ocean (CAO) during the last decades than during the past 800,000 years. Brackish brine (fed by meltwater inside the ice) is an expanding sympagic habitat in summer all over the CAO. We report for the first time the structure of bacterial communities in this brine. They are composed of psychrophilic extremophiles, many of them related to phylotypes known from Arctic and Antarctic regions. Community structure displayed strong habitat segregation between brackish ice brine (IB; salinity 2.4-9.6) and immediate sub-ice seawater (SW; salinity 33.3-34.9), expressed at all taxonomic levels (class to genus), by dominant phylotypes as well as by the rare biosphere, and with specialists dominating IB and generalists SW. The dominant phylotypes in IB were related to Candidatus Aquiluna and Flavobacterium, those in SW to Balneatrix and ZD0405, and those shared between the habitats to Halomonas, Polaribacter and Shewanella. A meta-analysis for the oligotrophic CAO showed a pattern with Flavobacteriia dominating in melt ponds, Flavobacteriia and Gammaproteobacteria in solid ice cores, Flavobacteriia, Gamma- and Betaproteobacteria, and Actinobacteria in brine, and Alphaproteobacteria in SW. Based on our results, we expect that the roles of Actinobacteria and Betaproteobacteria in the CAO will increase with global warming owing to the increased production of meltwater in summer. IB contained three times more phylotypes than SW and may act as an insurance reservoir for bacterial diversity that can act as a recruitment base when environmental conditions change. |
format |
Article in Journal/Newspaper |
author |
Fernández-Gómez, Beatriz Díez, Beatriz Polz, Martin F Arroyo, José Ignacio Alfaro, Fernando D Marchandon, Germán Sanhueza, Cynthia Farías, Laura Trefault, Nicole Marquet, Pablo A Molina-Montenegro, Marco A Sylvander, Peter Snoeijs-Leijonmalm, Pauline |
spellingShingle |
Fernández-Gómez, Beatriz Díez, Beatriz Polz, Martin F Arroyo, José Ignacio Alfaro, Fernando D Marchandon, Germán Sanhueza, Cynthia Farías, Laura Trefault, Nicole Marquet, Pablo A Molina-Montenegro, Marco A Sylvander, Peter Snoeijs-Leijonmalm, Pauline Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
author_facet |
Fernández-Gómez, Beatriz Díez, Beatriz Polz, Martin F Arroyo, José Ignacio Alfaro, Fernando D Marchandon, Germán Sanhueza, Cynthia Farías, Laura Trefault, Nicole Marquet, Pablo A Molina-Montenegro, Marco A Sylvander, Peter Snoeijs-Leijonmalm, Pauline |
author_sort |
Fernández-Gómez, Beatriz |
title |
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
title_short |
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
title_full |
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
title_fullStr |
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
title_full_unstemmed |
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °N. |
title_sort |
bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85-90 °n. |
publisher |
Silverchair Information Systems |
publishDate |
2019 |
url |
https://doi.org/10.1038/s41396-018-0268-9 https://pubmed.ncbi.nlm.nih.gov/30228379 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331608/ |
genre |
Antarc* Antarctic Arctic Ocean Global warming Sea ice |
genre_facet |
Antarc* Antarctic Arctic Ocean Global warming Sea ice |
op_source |
ISME J ISSN:1751-7370 Volume:13 Issue:2 |
op_relation |
https://doi.org/10.1038/s41396-018-0268-9 https://pubmed.ncbi.nlm.nih.gov/30228379 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6331608/ |
op_doi |
https://doi.org/10.1038/s41396-018-0268-9 |
container_title |
The ISME Journal |
container_volume |
13 |
container_issue |
2 |
container_start_page |
316 |
op_container_end_page |
333 |
_version_ |
1810289259112824832 |