Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica)
The composition of bacteria inhabiting the sea-surface microlayer (SML) is poorly characterized globally and yet undescribed for the Southern Ocean, despite their relevance for the biogeochemistry of the surface ocean. We report the abundances and diversity of bacteria inhabiting the SML and the sub...
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ftdoajarticles:oai:doaj.org/article:278b55946f3a442e99135b094d60c490 2023-05-15T13:51:26+02:00 Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) Alícia Martinez-Varela Gemma Casas Benjamin Piña Jordi Dachs Maria Vila-Costa 2020-09-01T00:00:00Z https://doi.org/10.3389/fmicb.2020.571983 https://doaj.org/article/278b55946f3a442e99135b094d60c490 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmicb.2020.571983/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2020.571983 https://doaj.org/article/278b55946f3a442e99135b094d60c490 Frontiers in Microbiology, Vol 11 (2020) sea-surface microlayer microbial communities organic pollutants surfactants amplicon sequencing bacterioneuston Microbiology QR1-502 article 2020 ftdoajarticles https://doi.org/10.3389/fmicb.2020.571983 2022-12-31T06:52:04Z The composition of bacteria inhabiting the sea-surface microlayer (SML) is poorly characterized globally and yet undescribed for the Southern Ocean, despite their relevance for the biogeochemistry of the surface ocean. We report the abundances and diversity of bacteria inhabiting the SML and the subsurface waters (SSL) determined from a unique sample set from a polar coastal ecosystem (Livingston Island, Antarctica). From early to late austral summer (January–March 2018), we consistently found a higher abundance of bacteria in the SML than in the SSL. The SML was enriched in some Gammaproteobacteria genus such as Pseudoalteromonas, Pseudomonas, and Colwellia, known to degrade a wide range of semivolatile, hydrophobic, and surfactant-like organic pollutants. Hydrocarbons and other synthetic chemicals including surfactants, such as perfluoroalkyl substances (PFAS), reach remote marine environments by atmospheric transport and deposition and by oceanic currents, and are known to accumulate in the SML. Relative abundances of specific SML-enriched bacterial groups were significantly correlated to concentrations of PFASs, taken as a proxy of hydrophobic anthropogenic pollutants present in the SML and its stability. Our observations provide evidence for an important pollutant-bacteria interaction in the marine SML. Given that pollutant emissions have increased during the Anthropocene, our results point to the need to assess chemical pollution as a factor modulating marine microbiomes in the contemporaneous and future oceans. Article in Journal/Newspaper Antarc* Antarctica Livingston Island Southern Ocean Directory of Open Access Journals: DOAJ Articles Austral Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Southern Ocean Frontiers in Microbiology 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sea-surface microlayer microbial communities organic pollutants surfactants amplicon sequencing bacterioneuston Microbiology QR1-502 |
spellingShingle |
sea-surface microlayer microbial communities organic pollutants surfactants amplicon sequencing bacterioneuston Microbiology QR1-502 Alícia Martinez-Varela Gemma Casas Benjamin Piña Jordi Dachs Maria Vila-Costa Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
topic_facet |
sea-surface microlayer microbial communities organic pollutants surfactants amplicon sequencing bacterioneuston Microbiology QR1-502 |
description |
The composition of bacteria inhabiting the sea-surface microlayer (SML) is poorly characterized globally and yet undescribed for the Southern Ocean, despite their relevance for the biogeochemistry of the surface ocean. We report the abundances and diversity of bacteria inhabiting the SML and the subsurface waters (SSL) determined from a unique sample set from a polar coastal ecosystem (Livingston Island, Antarctica). From early to late austral summer (January–March 2018), we consistently found a higher abundance of bacteria in the SML than in the SSL. The SML was enriched in some Gammaproteobacteria genus such as Pseudoalteromonas, Pseudomonas, and Colwellia, known to degrade a wide range of semivolatile, hydrophobic, and surfactant-like organic pollutants. Hydrocarbons and other synthetic chemicals including surfactants, such as perfluoroalkyl substances (PFAS), reach remote marine environments by atmospheric transport and deposition and by oceanic currents, and are known to accumulate in the SML. Relative abundances of specific SML-enriched bacterial groups were significantly correlated to concentrations of PFASs, taken as a proxy of hydrophobic anthropogenic pollutants present in the SML and its stability. Our observations provide evidence for an important pollutant-bacteria interaction in the marine SML. Given that pollutant emissions have increased during the Anthropocene, our results point to the need to assess chemical pollution as a factor modulating marine microbiomes in the contemporaneous and future oceans. |
format |
Article in Journal/Newspaper |
author |
Alícia Martinez-Varela Gemma Casas Benjamin Piña Jordi Dachs Maria Vila-Costa |
author_facet |
Alícia Martinez-Varela Gemma Casas Benjamin Piña Jordi Dachs Maria Vila-Costa |
author_sort |
Alícia Martinez-Varela |
title |
Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
title_short |
Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
title_full |
Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
title_fullStr |
Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
title_full_unstemmed |
Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica) |
title_sort |
large enrichment of anthropogenic organic matter degrading bacteria in the sea-surface microlayer at coastal livingston island (antarctica) |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmicb.2020.571983 https://doaj.org/article/278b55946f3a442e99135b094d60c490 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Austral Livingston Island Southern Ocean |
geographic_facet |
Austral Livingston Island Southern Ocean |
genre |
Antarc* Antarctica Livingston Island Southern Ocean |
genre_facet |
Antarc* Antarctica Livingston Island Southern Ocean |
op_source |
Frontiers in Microbiology, Vol 11 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmicb.2020.571983/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2020.571983 https://doaj.org/article/278b55946f3a442e99135b094d60c490 |
op_doi |
https://doi.org/10.3389/fmicb.2020.571983 |
container_title |
Frontiers in Microbiology |
container_volume |
11 |
_version_ |
1766255304611201024 |