Climate change and diminishing seasonality in Arctic benthic processes
The iconic picture of Arctic marine ecosystems shows an intense pulse of biological productivity around the spring bloom that is sustained while fresh organic matter (OM) is available, after which ecosystem activity declines to basal levels in autumn and winter. We investigated seasonality in benthi...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://archimer.ifremer.fr/doc/00646/75812/76755.pdf https://archimer.ifremer.fr/doc/00646/75812/76756.pdf https://doi.org/10.1098/rsta.2019.0369 https://archimer.ifremer.fr/doc/00646/75812/ |
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ftarchimer:oai:archimer.ifremer.fr:75812 2023-05-15T14:38:15+02:00 Climate change and diminishing seasonality in Arctic benthic processes Morata, Nathalie Michaud, Emma Poullaouec, Marie-aude Devesa, Jérémy Le Goff, Manon Corvaisier, Rudolph Renaud, Pierre Antoine 2020-10 application/pdf https://archimer.ifremer.fr/doc/00646/75812/76755.pdf https://archimer.ifremer.fr/doc/00646/75812/76756.pdf https://doi.org/10.1098/rsta.2019.0369 https://archimer.ifremer.fr/doc/00646/75812/ eng eng The Royal Society https://archimer.ifremer.fr/doc/00646/75812/76755.pdf https://archimer.ifremer.fr/doc/00646/75812/76756.pdf doi:10.1098/rsta.2019.0369 https://archimer.ifremer.fr/doc/00646/75812/ info:eu-repo/semantics/openAccess restricted use Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (The Royal Society), 2020-10 , Vol. 378 , N. 2181 , P. 20190369 (18p.) bioturbation Kongsfjorden nutrient fluxes phytodetritus respiration Svalbard text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1098/rsta.2019.0369 2021-09-23T20:35:46Z The iconic picture of Arctic marine ecosystems shows an intense pulse of biological productivity around the spring bloom that is sustained while fresh organic matter (OM) is available, after which ecosystem activity declines to basal levels in autumn and winter. We investigated seasonality in benthic biogeochemical cycling at three stations in a high Arctic fjord that has recently lost much of its seasonal ice-cover. Unlike observations from other Arctic locations, we find little seasonality in sediment community respiration and bioturbation rates, although different sediment reworking modes varied through the year. Nutrient fluxes did vary, suggesting that, although OM was processed at similar rates, seasonality in its quality led to spring/summer peaks in inorganic nitrogen and silicate fluxes. These patterns correspond to published information on seasonality in vertical flux at the stations. Largely ice-free Kongsfjorden has a considerable detrital pool in soft sediments which sustain benthic communities over the year. Sources of this include macroalgae and terrestrial runoff. Climate change leading to less ice cover, higher light availability and expanded benthic habitat may lead to more detrital carbon in the system, dampening the quantitative importance of seasonal pulses of phytodetritus to seafloor communities in some areas of the Arctic. 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 Climate change Kongsfjord* Kongsfjorden Svalbard Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Svalbard Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378 2181 20190369 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
bioturbation Kongsfjorden nutrient fluxes phytodetritus respiration Svalbard |
spellingShingle |
bioturbation Kongsfjorden nutrient fluxes phytodetritus respiration Svalbard Morata, Nathalie Michaud, Emma Poullaouec, Marie-aude Devesa, Jérémy Le Goff, Manon Corvaisier, Rudolph Renaud, Pierre Antoine Climate change and diminishing seasonality in Arctic benthic processes |
topic_facet |
bioturbation Kongsfjorden nutrient fluxes phytodetritus respiration Svalbard |
description |
The iconic picture of Arctic marine ecosystems shows an intense pulse of biological productivity around the spring bloom that is sustained while fresh organic matter (OM) is available, after which ecosystem activity declines to basal levels in autumn and winter. We investigated seasonality in benthic biogeochemical cycling at three stations in a high Arctic fjord that has recently lost much of its seasonal ice-cover. Unlike observations from other Arctic locations, we find little seasonality in sediment community respiration and bioturbation rates, although different sediment reworking modes varied through the year. Nutrient fluxes did vary, suggesting that, although OM was processed at similar rates, seasonality in its quality led to spring/summer peaks in inorganic nitrogen and silicate fluxes. These patterns correspond to published information on seasonality in vertical flux at the stations. Largely ice-free Kongsfjorden has a considerable detrital pool in soft sediments which sustain benthic communities over the year. Sources of this include macroalgae and terrestrial runoff. Climate change leading to less ice cover, higher light availability and expanded benthic habitat may lead to more detrital carbon in the system, dampening the quantitative importance of seasonal pulses of phytodetritus to seafloor communities in some areas of the Arctic. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'. |
format |
Article in Journal/Newspaper |
author |
Morata, Nathalie Michaud, Emma Poullaouec, Marie-aude Devesa, Jérémy Le Goff, Manon Corvaisier, Rudolph Renaud, Pierre Antoine |
author_facet |
Morata, Nathalie Michaud, Emma Poullaouec, Marie-aude Devesa, Jérémy Le Goff, Manon Corvaisier, Rudolph Renaud, Pierre Antoine |
author_sort |
Morata, Nathalie |
title |
Climate change and diminishing seasonality in Arctic benthic processes |
title_short |
Climate change and diminishing seasonality in Arctic benthic processes |
title_full |
Climate change and diminishing seasonality in Arctic benthic processes |
title_fullStr |
Climate change and diminishing seasonality in Arctic benthic processes |
title_full_unstemmed |
Climate change and diminishing seasonality in Arctic benthic processes |
title_sort |
climate change and diminishing seasonality in arctic benthic processes |
publisher |
The Royal Society |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00646/75812/76755.pdf https://archimer.ifremer.fr/doc/00646/75812/76756.pdf https://doi.org/10.1098/rsta.2019.0369 https://archimer.ifremer.fr/doc/00646/75812/ |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Ocean Climate change Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Arctic Arctic Ocean Climate change Kongsfjord* Kongsfjorden Svalbard |
op_source |
Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (The Royal Society), 2020-10 , Vol. 378 , N. 2181 , P. 20190369 (18p.) |
op_relation |
https://archimer.ifremer.fr/doc/00646/75812/76755.pdf https://archimer.ifremer.fr/doc/00646/75812/76756.pdf doi:10.1098/rsta.2019.0369 https://archimer.ifremer.fr/doc/00646/75812/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1098/rsta.2019.0369 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
378 |
container_issue |
2181 |
container_start_page |
20190369 |
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