Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn

The Arctic Ocean is considerably affected by the consequences of global warming, including more extreme seasonal fluctuations in the physical environment. So far, little is known about seasonality in Arctic marine ecosystems in particular microbial dynamics and cycling of organic matter. The limited...

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Published in:Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Main Authors: von Jackowski, Anabel, Grosse, Julia, Nöthig, Eva-Maria, Engel, Anja
Other Authors: Bundesministerium für Bildung und Forschung
Format: Article in Journal/Newspaper
Language:English
Published: The Royal Society 2020
Subjects:
Online Access:http://dx.doi.org/10.1098/rsta.2019.0366
https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2019.0366
https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2019.0366
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spelling crroyalsociety:10.1098/rsta.2019.0366 2024-09-30T14:29:40+00:00 Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn von Jackowski, Anabel Grosse, Julia Nöthig, Eva-Maria Engel, Anja Bundesministerium für Bildung und Forschung 2020 http://dx.doi.org/10.1098/rsta.2019.0366 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2019.0366 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2019.0366 en eng The Royal Society http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 378, issue 2181, page 20190366 ISSN 1364-503X 1471-2962 journal-article 2020 crroyalsociety https://doi.org/10.1098/rsta.2019.0366 2024-09-17T04:34:50Z The Arctic Ocean is considerably affected by the consequences of global warming, including more extreme seasonal fluctuations in the physical environment. So far, little is known about seasonality in Arctic marine ecosystems in particular microbial dynamics and cycling of organic matter. The limited characterization can be partially attributed to logistic difficulties of sampling in the Arctic Ocean beyond the summer season. Here, we investigated the distribution and composition of dissolved organic matter (DOM), gel particles and heterotrophic bacterial activity in the Fram Strait during summer and autumn. Our results revealed that phytoplankton biomass influenced the concentration and composition of semi-labile dissolved organic carbon (DOC), which strongly decreased from summer to autumn. The seasonal decrease in bioavailability of DOM appeared to be the dominant control on bacterial abundance and activity, while no temperature effect was determined. Additionally, there were clear differences in transparent exopolymer particles (TEP) and Coomassie Blue stainable particles (CSP) dynamics. The amount of TEP and CSP decreased from summer to autumn, but CSP was relatively enriched in both seasons. Our study therewith indicates clear seasonal differences in the microbial cycling of organic matter in the Fram Strait. Our data may help to establish baseline knowledge about seasonal changes in microbial ecosystem dynamics to better assess the impact of environmental change in the warming Arctic Ocean. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Global warming Phytoplankton The Royal Society Arctic Arctic Ocean Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378 2181 20190366
institution Open Polar
collection The Royal Society
op_collection_id crroyalsociety
language English
description The Arctic Ocean is considerably affected by the consequences of global warming, including more extreme seasonal fluctuations in the physical environment. So far, little is known about seasonality in Arctic marine ecosystems in particular microbial dynamics and cycling of organic matter. The limited characterization can be partially attributed to logistic difficulties of sampling in the Arctic Ocean beyond the summer season. Here, we investigated the distribution and composition of dissolved organic matter (DOM), gel particles and heterotrophic bacterial activity in the Fram Strait during summer and autumn. Our results revealed that phytoplankton biomass influenced the concentration and composition of semi-labile dissolved organic carbon (DOC), which strongly decreased from summer to autumn. The seasonal decrease in bioavailability of DOM appeared to be the dominant control on bacterial abundance and activity, while no temperature effect was determined. Additionally, there were clear differences in transparent exopolymer particles (TEP) and Coomassie Blue stainable particles (CSP) dynamics. The amount of TEP and CSP decreased from summer to autumn, but CSP was relatively enriched in both seasons. Our study therewith indicates clear seasonal differences in the microbial cycling of organic matter in the Fram Strait. Our data may help to establish baseline knowledge about seasonal changes in microbial ecosystem dynamics to better assess the impact of environmental change in the warming Arctic Ocean. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’.
author2 Bundesministerium für Bildung und Forschung
format Article in Journal/Newspaper
author von Jackowski, Anabel
Grosse, Julia
Nöthig, Eva-Maria
Engel, Anja
spellingShingle von Jackowski, Anabel
Grosse, Julia
Nöthig, Eva-Maria
Engel, Anja
Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
author_facet von Jackowski, Anabel
Grosse, Julia
Nöthig, Eva-Maria
Engel, Anja
author_sort von Jackowski, Anabel
title Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
title_short Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
title_full Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
title_fullStr Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
title_full_unstemmed Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn
title_sort dynamics of organic matter and bacterial activity in the fram strait during summer and autumn
publisher The Royal Society
publishDate 2020
url http://dx.doi.org/10.1098/rsta.2019.0366
https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2019.0366
https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2019.0366
geographic Arctic
Arctic Ocean
geographic_facet Arctic
Arctic Ocean
genre Arctic
Arctic Ocean
Fram Strait
Global warming
Phytoplankton
genre_facet Arctic
Arctic Ocean
Fram Strait
Global warming
Phytoplankton
op_source Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
volume 378, issue 2181, page 20190366
ISSN 1364-503X 1471-2962
op_rights http://creativecommons.org/licenses/by/4.0/
http://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.1098/rsta.2019.0366
container_title Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
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