Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer
International audience Long-chain polyunsaturated fatty acids (LC-PUFA) are molecules produced at the basis of marine food webs and essential for ecosystem functioning. This study reports detailed fatty acid (FA) composition including the two LC-PUFA 20:5n-3 and 22:6n-3, in suspended organic matter...
Published in: | Journal of Marine Systems |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://hal.univ-brest.fr/hal-03566357 https://hal.univ-brest.fr/hal-03566357/document https://hal.univ-brest.fr/hal-03566357/file/Origin%20and%20fate%20of%20long-chain%20polyunsaturated%20fatty%20acids%20in%20the%20Kerguelen.pdf https://doi.org/10.1016/j.jmarsys.2021.103693 |
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ftanrparis:oai:HAL:hal-03566357v1 |
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openpolar |
institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
Diatoms Essential fatty acids Fatty acid export Heterotrophic interactions Nutritional quality Phytoplankton diversity Vertical distribution [SDE]Environmental Sciences [SDV]Life Sciences [q-bio] |
spellingShingle |
Diatoms Essential fatty acids Fatty acid export Heterotrophic interactions Nutritional quality Phytoplankton diversity Vertical distribution [SDE]Environmental Sciences [SDV]Life Sciences [q-bio] Remize, Marine Planchon, Frédéric Loh, Ai Ning Le Grand, Fabienne Bideau, Antoine Puccinelli, Eleonora Volety, Aswani Soudant, Philippe Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
topic_facet |
Diatoms Essential fatty acids Fatty acid export Heterotrophic interactions Nutritional quality Phytoplankton diversity Vertical distribution [SDE]Environmental Sciences [SDV]Life Sciences [q-bio] |
description |
International audience Long-chain polyunsaturated fatty acids (LC-PUFA) are molecules produced at the basis of marine food webs and essential for ecosystem functioning. This study reports detailed fatty acid (FA) composition including the two LC-PUFA 20:5n-3 and 22:6n-3, in suspended organic matter (SPOM) from the upper 300 m collected in the Kerguelen Island region in the Southern Ocean during the post-bloom period (February–March 2018; project MOBYDICK). FA profiles were largely dominated by PUFA (53–69% of Total Fatty Acid, TFA) regardless of stations and among PUFA, proportions of LC-PUFA were especially high, making up 27–44% of TFA both in the ML and upper mesopelagic. 20:5n-3 and 22:6n-3 co-occurred in the ML as a result of the post-bloom phytoplankton community showing a mixed composition dominated by small size phytoplankton (prymnesiophytes and prasinophytes) supplying 22:6n-3, and with diatoms in lower proportions supplying 20:5n-3. Elevated levels of LC-PUFA were observed both inside the iron-fertilized area on the Kerguelen Plateau and downstream, and outside in High Nutrient Low Chlorophyll waters located upstream of the Plateau, and appeared unrelated to site. In the upper mesopelagic, both LC-PUFA were maintained at high relative proportions suggesting an efficient and possibly fast vertical transfer from the surface. Transfer with depth seems to proceed via distinct pathways according to LC-PUFA. 20:5n-3 may be exported along with diatoms, presumably in the form of large intact cells, aggregates as well as resting spores. For 22:6n-3, transfer may involve a channeling through the heterotrophic food web resulting in its association with fecal material at depth. Channeling of 22:6n-3 could involve heterotrophic protists such as dinoflagellates and ciliates grazing on small phytoplankton, as well as larger zooplankton such as copepods and salps, possibly feeding on microzooplankton and producing fecal pellets rich in 22:6n-3. According to LC-PUFA content, SPOM present throughout the upper water ... |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) University of North Carolina Wilmington (UNC) University of North Carolina System (UNC) Elon University NC, USA Isblue ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Remize, Marine Planchon, Frédéric Loh, Ai Ning Le Grand, Fabienne Bideau, Antoine Puccinelli, Eleonora Volety, Aswani Soudant, Philippe |
author_facet |
Remize, Marine Planchon, Frédéric Loh, Ai Ning Le Grand, Fabienne Bideau, Antoine Puccinelli, Eleonora Volety, Aswani Soudant, Philippe |
author_sort |
Remize, Marine |
title |
Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
title_short |
Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
title_full |
Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
title_fullStr |
Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
title_full_unstemmed |
Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer |
title_sort |
origin and fate of long-chain polyunsaturated fatty acids in the kerguelen islands region (southern ocean) in late summer |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.univ-brest.fr/hal-03566357 https://hal.univ-brest.fr/hal-03566357/document https://hal.univ-brest.fr/hal-03566357/file/Origin%20and%20fate%20of%20long-chain%20polyunsaturated%20fatty%20acids%20in%20the%20Kerguelen.pdf https://doi.org/10.1016/j.jmarsys.2021.103693 |
genre |
Kerguelen Islands Southern Ocean Copepods |
genre_facet |
Kerguelen Islands Southern Ocean Copepods |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal.univ-brest.fr/hal-03566357 Journal of Marine Systems, 2022, 228, pp.103693. ⟨10.1016/j.jmarsys.2021.103693⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103693 hal-03566357 https://hal.univ-brest.fr/hal-03566357 https://hal.univ-brest.fr/hal-03566357/document https://hal.univ-brest.fr/hal-03566357/file/Origin%20and%20fate%20of%20long-chain%20polyunsaturated%20fatty%20acids%20in%20the%20Kerguelen.pdf doi:10.1016/j.jmarsys.2021.103693 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103693 |
container_title |
Journal of Marine Systems |
container_volume |
228 |
container_start_page |
103693 |
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1810454475202101248 |
spelling |
ftanrparis:oai:HAL:hal-03566357v1 2024-09-15T18:16:28+00:00 Origin and fate of long-chain polyunsaturated fatty acids in the Kerguelen Islands region (Southern Ocean) in late summer Remize, Marine Planchon, Frédéric Loh, Ai Ning Le Grand, Fabienne Bideau, Antoine Puccinelli, Eleonora Volety, Aswani Soudant, Philippe Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) University of North Carolina Wilmington (UNC) University of North Carolina System (UNC) Elon University NC, USA Isblue ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2022-04 https://hal.univ-brest.fr/hal-03566357 https://hal.univ-brest.fr/hal-03566357/document https://hal.univ-brest.fr/hal-03566357/file/Origin%20and%20fate%20of%20long-chain%20polyunsaturated%20fatty%20acids%20in%20the%20Kerguelen.pdf https://doi.org/10.1016/j.jmarsys.2021.103693 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103693 hal-03566357 https://hal.univ-brest.fr/hal-03566357 https://hal.univ-brest.fr/hal-03566357/document https://hal.univ-brest.fr/hal-03566357/file/Origin%20and%20fate%20of%20long-chain%20polyunsaturated%20fatty%20acids%20in%20the%20Kerguelen.pdf doi:10.1016/j.jmarsys.2021.103693 info:eu-repo/semantics/OpenAccess ISSN: 0924-7963 Journal of Marine Systems https://hal.univ-brest.fr/hal-03566357 Journal of Marine Systems, 2022, 228, pp.103693. ⟨10.1016/j.jmarsys.2021.103693⟩ Diatoms Essential fatty acids Fatty acid export Heterotrophic interactions Nutritional quality Phytoplankton diversity Vertical distribution [SDE]Environmental Sciences [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2022 ftanrparis https://doi.org/10.1016/j.jmarsys.2021.103693 2024-07-12T10:50:06Z International audience Long-chain polyunsaturated fatty acids (LC-PUFA) are molecules produced at the basis of marine food webs and essential for ecosystem functioning. This study reports detailed fatty acid (FA) composition including the two LC-PUFA 20:5n-3 and 22:6n-3, in suspended organic matter (SPOM) from the upper 300 m collected in the Kerguelen Island region in the Southern Ocean during the post-bloom period (February–March 2018; project MOBYDICK). FA profiles were largely dominated by PUFA (53–69% of Total Fatty Acid, TFA) regardless of stations and among PUFA, proportions of LC-PUFA were especially high, making up 27–44% of TFA both in the ML and upper mesopelagic. 20:5n-3 and 22:6n-3 co-occurred in the ML as a result of the post-bloom phytoplankton community showing a mixed composition dominated by small size phytoplankton (prymnesiophytes and prasinophytes) supplying 22:6n-3, and with diatoms in lower proportions supplying 20:5n-3. Elevated levels of LC-PUFA were observed both inside the iron-fertilized area on the Kerguelen Plateau and downstream, and outside in High Nutrient Low Chlorophyll waters located upstream of the Plateau, and appeared unrelated to site. In the upper mesopelagic, both LC-PUFA were maintained at high relative proportions suggesting an efficient and possibly fast vertical transfer from the surface. Transfer with depth seems to proceed via distinct pathways according to LC-PUFA. 20:5n-3 may be exported along with diatoms, presumably in the form of large intact cells, aggregates as well as resting spores. For 22:6n-3, transfer may involve a channeling through the heterotrophic food web resulting in its association with fecal material at depth. Channeling of 22:6n-3 could involve heterotrophic protists such as dinoflagellates and ciliates grazing on small phytoplankton, as well as larger zooplankton such as copepods and salps, possibly feeding on microzooplankton and producing fecal pellets rich in 22:6n-3. According to LC-PUFA content, SPOM present throughout the upper water ... Article in Journal/Newspaper Kerguelen Islands Southern Ocean Copepods Portail HAL-ANR (Agence Nationale de la Recherche) Journal of Marine Systems 228 103693 |