Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export
International audience The Southern Ocean (SO) hosts plankton communities that impact the biogeochemical cycles of the global ocean. However, weather conditions in the SO restrict mainly in situ observations of plankton communities to spring and summer, preventing the description of biological succe...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.science/hal-03138099 https://hal.science/hal-03138099/document https://hal.science/hal-03138099/file/2017JC013067.pdf https://doi.org/10.1002/2017jc013067 |
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ftinsu:oai:HAL:hal-03138099v1 2024-02-11T10:08:49+01:00 Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export Rembauville, Mathieu Briggs, Nathan Ardyna, Mathieu Uitz, Julia Catala, Philippe Penkerc'H, Cristophe Poteau, Antoine Claustre, Hervé Blain, Stéphane Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2017-10 https://hal.science/hal-03138099 https://hal.science/hal-03138099/document https://hal.science/hal-03138099/file/2017JC013067.pdf https://doi.org/10.1002/2017jc013067 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2017jc013067 hal-03138099 https://hal.science/hal-03138099 https://hal.science/hal-03138099/document https://hal.science/hal-03138099/file/2017JC013067.pdf doi:10.1002/2017jc013067 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03138099 Journal of Geophysical Research. Oceans, 2017, 122 (10), pp.8278-8292. ⟨10.1002/2017jc013067⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftinsu https://doi.org/10.1002/2017jc013067 2024-01-24T17:32:15Z International audience The Southern Ocean (SO) hosts plankton communities that impact the biogeochemical cycles of the global ocean. However, weather conditions in the SO restrict mainly in situ observations of plankton communities to spring and summer, preventing the description of biological successions at an annual scale. Here, we use shipboard observations collected in the Indian sector of the SO to develop a multivariate relationship between physical and bio-optical data, and, the composition and carbon content of the plankton community. Then we apply this multivariate relationship to five biogeochemical Argo (BGC-Argo) floats deployed within the same bio-geographical zone as the ship-board observations to describe spatial and seasonal changes in plankton assemblage. The floats reveal a high contribution of bacteria below the mixed layer, an overall low abundance of picoplankton and a seasonal succession from nano-to microplankton during the spring bloom. Both naturally iron-fertilized waters downstream of the Crozet and Kerguelen Plateaus show elevated phytoplankton biomass in spring and summer but they differ by a nano-or microplankton dominance at Crozet and Kerguelen, respectively. The estimated plankton group successions appear consistent with independent estimations of particle diameter based on the optical signals. Furthermore, the comparison of the plankton community composition in the surface layer with the presence of large mesopelagic particles diagnosed by spikes of optical signals provides insight into the nature and temporal changes of ecological vectors that drive particle export. This study emphasizes the power of BGC-Argo floats for investigating important biogeochemical processes at high temporal and spatial resolution. Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Indian Kerguelen Southern Ocean Journal of Geophysical Research: Oceans 122 10 8278 8292 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Rembauville, Mathieu Briggs, Nathan Ardyna, Mathieu Uitz, Julia Catala, Philippe Penkerc'H, Cristophe Poteau, Antoine Claustre, Hervé Blain, Stéphane Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience The Southern Ocean (SO) hosts plankton communities that impact the biogeochemical cycles of the global ocean. However, weather conditions in the SO restrict mainly in situ observations of plankton communities to spring and summer, preventing the description of biological successions at an annual scale. Here, we use shipboard observations collected in the Indian sector of the SO to develop a multivariate relationship between physical and bio-optical data, and, the composition and carbon content of the plankton community. Then we apply this multivariate relationship to five biogeochemical Argo (BGC-Argo) floats deployed within the same bio-geographical zone as the ship-board observations to describe spatial and seasonal changes in plankton assemblage. The floats reveal a high contribution of bacteria below the mixed layer, an overall low abundance of picoplankton and a seasonal succession from nano-to microplankton during the spring bloom. Both naturally iron-fertilized waters downstream of the Crozet and Kerguelen Plateaus show elevated phytoplankton biomass in spring and summer but they differ by a nano-or microplankton dominance at Crozet and Kerguelen, respectively. The estimated plankton group successions appear consistent with independent estimations of particle diameter based on the optical signals. Furthermore, the comparison of the plankton community composition in the surface layer with the presence of large mesopelagic particles diagnosed by spikes of optical signals provides insight into the nature and temporal changes of ecological vectors that drive particle export. This study emphasizes the power of BGC-Argo floats for investigating important biogeochemical processes at high temporal and spatial resolution. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Rembauville, Mathieu Briggs, Nathan Ardyna, Mathieu Uitz, Julia Catala, Philippe Penkerc'H, Cristophe Poteau, Antoine Claustre, Hervé Blain, Stéphane |
author_facet |
Rembauville, Mathieu Briggs, Nathan Ardyna, Mathieu Uitz, Julia Catala, Philippe Penkerc'H, Cristophe Poteau, Antoine Claustre, Hervé Blain, Stéphane |
author_sort |
Rembauville, Mathieu |
title |
Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
title_short |
Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
title_full |
Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
title_fullStr |
Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
title_full_unstemmed |
Plankton Assemblage Estimated with BGC-Argo Floats in the Southern Ocean: Implications for Seasonal Successions and Particle Export |
title_sort |
plankton assemblage estimated with bgc-argo floats in the southern ocean: implications for seasonal successions and particle export |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-03138099 https://hal.science/hal-03138099/document https://hal.science/hal-03138099/file/2017JC013067.pdf https://doi.org/10.1002/2017jc013067 |
geographic |
Indian Kerguelen Southern Ocean |
geographic_facet |
Indian Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03138099 Journal of Geophysical Research. Oceans, 2017, 122 (10), pp.8278-8292. ⟨10.1002/2017jc013067⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017jc013067 hal-03138099 https://hal.science/hal-03138099 https://hal.science/hal-03138099/document https://hal.science/hal-03138099/file/2017JC013067.pdf doi:10.1002/2017jc013067 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2017jc013067 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
10 |
container_start_page |
8278 |
op_container_end_page |
8292 |
_version_ |
1790608430798471168 |