Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean)
International audience This study investigated protist community composition and biotic interactions focusing on microplankton at four distinct sites around the Kerguelen Islands (Southern Ocean) after the summer phytoplankton bloom. Protist diversity in different size fractions, sampled with Niskin...
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ftanrparis:oai:HAL:hal-04262911v1 2024-06-23T07:54:20+00:00 Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) Sassenhagen, Ingrid Irion, Solène Jardillier, Ludwig Moreira, David Christaki, Urania Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Ecologie Systématique et Evolution (ESE) AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Université du Littoral Côte d'Opale (ULCO) ANR-17-CE01-0013,MOBYDICK,Biodiversité des Ecosystèmes Marins et Dynamique du Carbone dans le secteur de Kerguelen : approche intégrée(2017) 2020-02 https://hal.science/hal-04262911 https://doi.org/10.1016/j.protis.2019.125709 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.protis.2019.125709 hal-04262911 https://hal.science/hal-04262911 doi:10.1016/j.protis.2019.125709 ISSN: 1434-4610 Protist https://hal.science/hal-04262911 Protist, 2020, 171 (1), pp.125709. ⟨10.1016/j.protis.2019.125709⟩ Southern Ocean single cell sequencing co-variance analysis biotic interactions parasitic Syndiniales predation [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2020 ftanrparis https://doi.org/10.1016/j.protis.2019.125709 2024-06-05T23:44:53Z International audience This study investigated protist community composition and biotic interactions focusing on microplankton at four distinct sites around the Kerguelen Islands (Southern Ocean) after the summer phytoplankton bloom. Protist diversity in different size fractions, sampled with Niskin bottles and plankton nets, was assessed by sequencing of the V4 18S rDNA region. Combining different approaches, i.e. sequencing of different plankton size fractions, and isolation and sequencing of single cells, provided new insights into microbial interactions in protist communities. The communities displayed high variability, including short-term fluctuations in relative abundance of large protists (>35 μm) highlighted by the plankton net samples. Size fractionation of protist communities showed high concentrations of free Syndiniales spores but relatively few Syndiniales associated with microplankton, suggesting low parasitic infection in early autumn. Co-variance network analyses and sequencing of individually isolated single cells highlighted the important role of Rhizaria as consumers of a wide range of different diatom taxa. The data also raised the hypothesis that different Syndiniales clades might be directly or indirectly associated with some diatom genera, thus suggesting a potentially wider host range of these parasites than has been previously reported. These associations and the potential impact on carbon fluxes are discussed. Article in Journal/Newspaper Kerguelen Islands Southern Ocean Portail HAL-ANR (Agence Nationale de la Recherche) Kerguelen Kerguelen Islands Southern Ocean Protist 171 1 125709 |
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Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
Southern Ocean single cell sequencing co-variance analysis biotic interactions parasitic Syndiniales predation [SDE]Environmental Sciences |
spellingShingle |
Southern Ocean single cell sequencing co-variance analysis biotic interactions parasitic Syndiniales predation [SDE]Environmental Sciences Sassenhagen, Ingrid Irion, Solène Jardillier, Ludwig Moreira, David Christaki, Urania Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
topic_facet |
Southern Ocean single cell sequencing co-variance analysis biotic interactions parasitic Syndiniales predation [SDE]Environmental Sciences |
description |
International audience This study investigated protist community composition and biotic interactions focusing on microplankton at four distinct sites around the Kerguelen Islands (Southern Ocean) after the summer phytoplankton bloom. Protist diversity in different size fractions, sampled with Niskin bottles and plankton nets, was assessed by sequencing of the V4 18S rDNA region. Combining different approaches, i.e. sequencing of different plankton size fractions, and isolation and sequencing of single cells, provided new insights into microbial interactions in protist communities. The communities displayed high variability, including short-term fluctuations in relative abundance of large protists (>35 μm) highlighted by the plankton net samples. Size fractionation of protist communities showed high concentrations of free Syndiniales spores but relatively few Syndiniales associated with microplankton, suggesting low parasitic infection in early autumn. Co-variance network analyses and sequencing of individually isolated single cells highlighted the important role of Rhizaria as consumers of a wide range of different diatom taxa. The data also raised the hypothesis that different Syndiniales clades might be directly or indirectly associated with some diatom genera, thus suggesting a potentially wider host range of these parasites than has been previously reported. These associations and the potential impact on carbon fluxes are discussed. |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Ecologie Systématique et Evolution (ESE) AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Université du Littoral Côte d'Opale (ULCO) ANR-17-CE01-0013,MOBYDICK,Biodiversité des Ecosystèmes Marins et Dynamique du Carbone dans le secteur de Kerguelen : approche intégrée(2017) |
format |
Article in Journal/Newspaper |
author |
Sassenhagen, Ingrid Irion, Solène Jardillier, Ludwig Moreira, David Christaki, Urania |
author_facet |
Sassenhagen, Ingrid Irion, Solène Jardillier, Ludwig Moreira, David Christaki, Urania |
author_sort |
Sassenhagen, Ingrid |
title |
Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
title_short |
Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
title_full |
Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
title_fullStr |
Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
title_full_unstemmed |
Protist Interactions and Community Structure During Early Autumn in the Kerguelen Region (Southern Ocean) |
title_sort |
protist interactions and community structure during early autumn in the kerguelen region (southern ocean) |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-04262911 https://doi.org/10.1016/j.protis.2019.125709 |
geographic |
Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
ISSN: 1434-4610 Protist https://hal.science/hal-04262911 Protist, 2020, 171 (1), pp.125709. ⟨10.1016/j.protis.2019.125709⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.protis.2019.125709 hal-04262911 https://hal.science/hal-04262911 doi:10.1016/j.protis.2019.125709 |
op_doi |
https://doi.org/10.1016/j.protis.2019.125709 |
container_title |
Protist |
container_volume |
171 |
container_issue |
1 |
container_start_page |
125709 |
_version_ |
1802646471425654784 |