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...
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Edith Cowan University, Research Online, Perth, Western Australia
2023
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ftedithcowan:oai:ro.ecu.edu.au:ecuworks2022-2026-3148 2023-12-17T10:20:26+01:00 Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas Puigcorbé, Viena Ruiz-González, Clara Masqué, Pere Gasol, Josep M. 2023-01-01T08:00:00Z application/pdf https://ro.ecu.edu.au/ecuworks2022-2026/2148 https://doi.org/10.3389/fmicb.2023.1078469 https://ro.ecu.edu.au/context/ecuworks2022-2026/article/3148/viewcontent/Impact_20of_20particle_20flux_20on_20the_20vertical_20distribution.pdf unknown Edith Cowan University, Research Online, Perth, Western Australia https://ro.ecu.edu.au/ecuworks2022-2026/2148 doi:10.3389/fmicb.2023.1078469 https://ro.ecu.edu.au/context/ecuworks2022-2026/article/3148/viewcontent/Impact_20of_20particle_20flux_20on_20the_20vertical_20distribution.pdf http://creativecommons.org/licenses/by/4.0/ Research outputs 2022 to 2026 234 Thorium Antarctica marine particles particle export particle size fractionation particle-attached and free-living prokaryotes polynyas prokaryotic communities Life Sciences Marine Biology text 2023 ftedithcowan https://doi.org/10.3389/fmicb.2023.1078469 2023-11-18T23:46:19Z 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. Text Antarc* Antarctic Antarctica Edith Cowan University (ECU, Australia): Research Online Antarctic Ambio 52 5 897 917 |
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Open Polar |
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Edith Cowan University (ECU, Australia): Research Online |
op_collection_id |
ftedithcowan |
language |
unknown |
topic |
234 Thorium Antarctica marine particles particle export particle size fractionation particle-attached and free-living prokaryotes polynyas prokaryotic communities Life Sciences Marine Biology |
spellingShingle |
234 Thorium Antarctica marine particles particle export particle size fractionation particle-attached and free-living prokaryotes polynyas prokaryotic communities Life Sciences Marine Biology Puigcorbé, Viena Ruiz-González, Clara Masqué, Pere Gasol, Josep M. Impact of particle flux on the vertical distribution and diversity of size-fractionated prokaryotic communities in two East Antarctic polynyas |
topic_facet |
234 Thorium Antarctica marine particles particle export particle size fractionation particle-attached and free-living prokaryotes polynyas prokaryotic communities Life Sciences Marine Biology |
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 |
Text |
author |
Puigcorbé, Viena Ruiz-González, Clara Masqué, Pere Gasol, Josep M. |
author_facet |
Puigcorbé, Viena Ruiz-González, Clara Masqué, Pere Gasol, Josep M. |
author_sort |
Puigcorbé, Viena |
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 |
Edith Cowan University, Research Online, Perth, Western Australia |
publishDate |
2023 |
url |
https://ro.ecu.edu.au/ecuworks2022-2026/2148 https://doi.org/10.3389/fmicb.2023.1078469 https://ro.ecu.edu.au/context/ecuworks2022-2026/article/3148/viewcontent/Impact_20of_20particle_20flux_20on_20the_20vertical_20distribution.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Research outputs 2022 to 2026 |
op_relation |
https://ro.ecu.edu.au/ecuworks2022-2026/2148 doi:10.3389/fmicb.2023.1078469 https://ro.ecu.edu.au/context/ecuworks2022-2026/article/3148/viewcontent/Impact_20of_20particle_20flux_20on_20the_20vertical_20distribution.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2023.1078469 |
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Ambio |
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52 |
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5 |
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897 |
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917 |
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