Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas
Antarctic polynyas are highly productive open water areas surrounded by ice where extensive phytoplankton blooms occur, but little is known about how these surface blooms influence carbon fluxes and prokaryotic communities from deeper waters. By sequencing the 16S rRNA gene, we explored the vertical...
Published in: | Frontiers in Microbiology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fmicb.2023.1078469 https://doaj.org/article/489a59c518f1436fbfa02835e3d3f681 |
id |
ftdoajarticles:oai:doaj.org/article:489a59c518f1436fbfa02835e3d3f681 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:489a59c518f1436fbfa02835e3d3f681 2023-05-15T13:56:54+02:00 Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas Viena Puigcorbé Clara Ruiz-González Pere Masqué Josep M. Gasol 2023-02-01T00:00:00Z https://doi.org/10.3389/fmicb.2023.1078469 https://doaj.org/article/489a59c518f1436fbfa02835e3d3f681 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmicb.2023.1078469/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2023.1078469 https://doaj.org/article/489a59c518f1436fbfa02835e3d3f681 Frontiers in Microbiology, Vol 14 (2023) prokaryotic communities marine particles 234Thorium particle export polynyas Antarctica Microbiology QR1-502 article 2023 ftdoajarticles https://doi.org/10.3389/fmicb.2023.1078469 2023-02-26T01:33:42Z Antarctic polynyas are highly productive open water areas surrounded by ice where extensive phytoplankton blooms occur, but little is known about how these surface blooms influence carbon fluxes and prokaryotic communities from deeper waters. By sequencing the 16S rRNA gene, we explored the vertical connectivity of the prokaryotic assemblages associated with particles of three different sizes in two polynyas with different surface productivity, and we linked it to the magnitude of the particle export fluxes measured using thorium-234 (234Th) as particle tracer. Between the sunlit and the mesopelagic layers (700 m depth), we observed compositional changes in the prokaryotic communities associated with the three size-fractions, which were mostly dominated by Flavobacteriia, Alphaproteobacteria, and Gammaproteobacteria. Interestingly, the vertical differences between bacterial communities attached to the largest particles decreased with increasing 234Th export fluxes, indicating a more intense downward transport of surface prokaryotes in the most productive polynya. This was accompanied by a higher proportion of surface prokaryotic taxa detected in deep particle-attached microbial communities in the station with the highest 234Th export flux. Our results support recent studies evidencing links between surface productivity and deep prokaryotic communities and provide the first evidence of sinking particles acting as vectors of microbial diversity to depth in Antarctic polynyas, highlighting the direct influence of particle export in shaping the prokaryotic communities of mesopelagic waters. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Frontiers in Microbiology 14 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
prokaryotic communities marine particles 234Thorium particle export polynyas Antarctica Microbiology QR1-502 |
spellingShingle |
prokaryotic communities marine particles 234Thorium particle export polynyas Antarctica Microbiology QR1-502 Viena Puigcorbé Clara Ruiz-González Pere Masqué Josep M. Gasol Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
topic_facet |
prokaryotic communities marine particles 234Thorium particle export polynyas Antarctica Microbiology QR1-502 |
description |
Antarctic polynyas are highly productive open water areas surrounded by ice where extensive phytoplankton blooms occur, but little is known about how these surface blooms influence carbon fluxes and prokaryotic communities from deeper waters. By sequencing the 16S rRNA gene, we explored the vertical connectivity of the prokaryotic assemblages associated with particles of three different sizes in two polynyas with different surface productivity, and we linked it to the magnitude of the particle export fluxes measured using thorium-234 (234Th) as particle tracer. Between the sunlit and the mesopelagic layers (700 m depth), we observed compositional changes in the prokaryotic communities associated with the three size-fractions, which were mostly dominated by Flavobacteriia, Alphaproteobacteria, and Gammaproteobacteria. Interestingly, the vertical differences between bacterial communities attached to the largest particles decreased with increasing 234Th export fluxes, indicating a more intense downward transport of surface prokaryotes in the most productive polynya. This was accompanied by a higher proportion of surface prokaryotic taxa detected in deep particle-attached microbial communities in the station with the highest 234Th export flux. Our results support recent studies evidencing links between surface productivity and deep prokaryotic communities and provide the first evidence of sinking particles acting as vectors of microbial diversity to depth in Antarctic polynyas, highlighting the direct influence of particle export in shaping the prokaryotic communities of mesopelagic waters. |
format |
Article in Journal/Newspaper |
author |
Viena Puigcorbé Clara Ruiz-González Pere Masqué Josep M. Gasol |
author_facet |
Viena Puigcorbé Clara Ruiz-González Pere Masqué Josep M. Gasol |
author_sort |
Viena Puigcorbé |
title |
Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
title_short |
Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
title_full |
Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
title_fullStr |
Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
title_full_unstemmed |
Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
title_sort |
impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two east antarctic polynyas |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmicb.2023.1078469 https://doaj.org/article/489a59c518f1436fbfa02835e3d3f681 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Frontiers in Microbiology, Vol 14 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmicb.2023.1078469/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2023.1078469 https://doaj.org/article/489a59c518f1436fbfa02835e3d3f681 |
op_doi |
https://doi.org/10.3389/fmicb.2023.1078469 |
container_title |
Frontiers in Microbiology |
container_volume |
14 |
_version_ |
1766264510263328768 |