A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait

Marine sinking particles sequester atmospheric carbon dioxide to the deep ocean via the biological carbon pump. Understanding how environmental shifts drive changes in the microbial composition of particles, and how these affect the export of organic matter from the surface to the deep ocean, is cri...

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Published in:Frontiers in Marine Science
Main Authors: Cardozo-Mino, Magda G., Salter, Ian, Nöthig, Eva-Maria, Metfies, Katja, Ramondenc, Simon, Wekerle, Claudia, Krumpen, Thomas, Boetius, Antje, Bienhold, Christina
Format: Article in Journal/Newspaper
Language:unknown
Published: Frontiers Media SA 2023
Subjects:
Online Access:http://dx.doi.org/10.3389/fmars.2023.1173384
https://www.frontiersin.org/articles/10.3389/fmars.2023.1173384/full
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spelling crfrontiers:10.3389/fmars.2023.1173384 2024-05-19T07:35:54+00:00 A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait Cardozo-Mino, Magda G. Salter, Ian Nöthig, Eva-Maria Metfies, Katja Ramondenc, Simon Wekerle, Claudia Krumpen, Thomas Boetius, Antje Bienhold, Christina 2023 http://dx.doi.org/10.3389/fmars.2023.1173384 https://www.frontiersin.org/articles/10.3389/fmars.2023.1173384/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 10 ISSN 2296-7745 journal-article 2023 crfrontiers https://doi.org/10.3389/fmars.2023.1173384 2024-05-01T06:50:33Z Marine sinking particles sequester atmospheric carbon dioxide to the deep ocean via the biological carbon pump. Understanding how environmental shifts drive changes in the microbial composition of particles, and how these affect the export of organic matter from the surface to the deep ocean, is critical, especially in the rapidly changing Arctic Ocean. Here, we applied next generation sequencing of the 18S and 16S rRNA genes to sediment trap samples from around 200 m water depth in the eastern Fram Strait, covering a time frame of more than one decade (2000-2012). The aim was to characterize their microbial composition during annual highest particulate organic carbon flux events. The bimodal annual spring and summer export fluxes were representative of the strong seasonality in the region. Furthermore, the study period was characterized by considerable interannual variation, marked especially by a warm water anomaly between 2005 and 2007. During this period changes in the hydrography and sea ice cover also led to measurable changes in the microbial composition of particles. The warm water period was marked by a decrease in diatoms affiliated with Chaetoceros , an increase of small phytoplankton and an increase in sequence abundance of the bacterial taxa Oceanospirillales , Alteromonadales and Rhodobacterales on the particles. The resulting changes in microbial composition and the associated microbial network structure suggest the emergence of a more developed retention system in the surface ocean. Our results provide the first long-term assessment of the microbial composition of sinking particles in the Arctic Ocean, and stress the importance of sea ice and hydrography for particle composition and subsequent flux of organic matter to deeper waters. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Phytoplankton Sea ice Frontiers (Publisher) Frontiers in Marine Science 10
institution Open Polar
collection Frontiers (Publisher)
op_collection_id crfrontiers
language unknown
description Marine sinking particles sequester atmospheric carbon dioxide to the deep ocean via the biological carbon pump. Understanding how environmental shifts drive changes in the microbial composition of particles, and how these affect the export of organic matter from the surface to the deep ocean, is critical, especially in the rapidly changing Arctic Ocean. Here, we applied next generation sequencing of the 18S and 16S rRNA genes to sediment trap samples from around 200 m water depth in the eastern Fram Strait, covering a time frame of more than one decade (2000-2012). The aim was to characterize their microbial composition during annual highest particulate organic carbon flux events. The bimodal annual spring and summer export fluxes were representative of the strong seasonality in the region. Furthermore, the study period was characterized by considerable interannual variation, marked especially by a warm water anomaly between 2005 and 2007. During this period changes in the hydrography and sea ice cover also led to measurable changes in the microbial composition of particles. The warm water period was marked by a decrease in diatoms affiliated with Chaetoceros , an increase of small phytoplankton and an increase in sequence abundance of the bacterial taxa Oceanospirillales , Alteromonadales and Rhodobacterales on the particles. The resulting changes in microbial composition and the associated microbial network structure suggest the emergence of a more developed retention system in the surface ocean. Our results provide the first long-term assessment of the microbial composition of sinking particles in the Arctic Ocean, and stress the importance of sea ice and hydrography for particle composition and subsequent flux of organic matter to deeper waters.
format Article in Journal/Newspaper
author Cardozo-Mino, Magda G.
Salter, Ian
Nöthig, Eva-Maria
Metfies, Katja
Ramondenc, Simon
Wekerle, Claudia
Krumpen, Thomas
Boetius, Antje
Bienhold, Christina
spellingShingle Cardozo-Mino, Magda G.
Salter, Ian
Nöthig, Eva-Maria
Metfies, Katja
Ramondenc, Simon
Wekerle, Claudia
Krumpen, Thomas
Boetius, Antje
Bienhold, Christina
A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
author_facet Cardozo-Mino, Magda G.
Salter, Ian
Nöthig, Eva-Maria
Metfies, Katja
Ramondenc, Simon
Wekerle, Claudia
Krumpen, Thomas
Boetius, Antje
Bienhold, Christina
author_sort Cardozo-Mino, Magda G.
title A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
title_short A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
title_full A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
title_fullStr A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
title_full_unstemmed A decade of microbial community dynamics on sinking particles during high carbon export events in the eastern Fram Strait
title_sort decade of microbial community dynamics on sinking particles during high carbon export events in the eastern fram strait
publisher Frontiers Media SA
publishDate 2023
url http://dx.doi.org/10.3389/fmars.2023.1173384
https://www.frontiersin.org/articles/10.3389/fmars.2023.1173384/full
genre Arctic
Arctic Ocean
Fram Strait
Phytoplankton
Sea ice
genre_facet Arctic
Arctic Ocean
Fram Strait
Phytoplankton
Sea ice
op_source Frontiers in Marine Science
volume 10
ISSN 2296-7745
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3389/fmars.2023.1173384
container_title Frontiers in Marine Science
container_volume 10
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