Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean
The interplay among microorganisms profoundly impacts biogeochemical cycles in the ocean. However, the questions of how microbes associated with each other on the spatial and temporal scale, and whether the associations of diatom-prokaryote and of DOM-prokaryote affect the distributions of these thr...
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ftinsu:oai:HAL:tel-03139883v1 2023-11-05T03:45:13+01:00 Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean Modèles spatiaux et temporels dans l’association entre diatomées et procaryotes dans l'océan Austral Liu, Yan Laboratoire d'Océanographie Microbienne (LOMIC) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Sorbonne Université Ingrid Obernosterer 2019-09-20 https://theses.hal.science/tel-03139883 https://theses.hal.science/tel-03139883/document https://theses.hal.science/tel-03139883/file/2019SORUS213.pdf en eng HAL CCSD NNT: 2019SORUS213 tel-03139883 https://theses.hal.science/tel-03139883 https://theses.hal.science/tel-03139883/document https://theses.hal.science/tel-03139883/file/2019SORUS213.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-03139883 Ecosystems. Sorbonne Université, 2019. English. ⟨NNT : 2019SORUS213⟩ Diatoms Prokaryotes Interactions Southern Ocean Kerguelen plateau Diversity Diatomées Procaryotes Interaction Océan Austral Kerguelen Séquençage [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/doctoralThesis Theses 2019 ftinsu 2023-10-11T16:33:54Z The interplay among microorganisms profoundly impacts biogeochemical cycles in the ocean. However, the questions of how microbes associated with each other on the spatial and temporal scale, and whether the associations of diatom-prokaryote and of DOM-prokaryote affect the distributions of these three components are open. In chapter 1, we observed distinct compositions of diatom and prokaryotic communities among the major ocean zones. Significant relationships between compositional changes of diatoms and of prokaryotes were found. In chapter 2, we observed two consecutive phytoplankton blooms, each composed of distinct diatom assemblages. Using network analysis, we identified two groups of diatoms representative of the spring and summer bloom, respectively, that had opposite correlation patterns with prokaryotic taxa. In chapter 3, we found the distinct composition of DOM and that of total and active prokaryotes on and off the plateau. The DOM-prokaryote correlations were overall stronger on the plateau than that off the plateau. The key active prokaryotic groups that strongly correlated with DOM were qualitatively similar in both ecosystems and quantitatively higher on the plateau. Taken together, our results demonstrate the significant associations between diatoms and prokaryotes, and between prokaryotes and DOM. The compositions of prokaryotic communities are influenced by both diatoms and DOM. L’interaction entre les micro-organismes a de profondes répercussions sur les cycles biogéochimiques de l’océan. Cependant, la question de savoir comment les microbes s’associent les uns aux autres aux échelles spatiale et temporelle et si les associations de diatom-procaryote et de DOM-procaryote affectent la distribution de ces trois composants est ouverte. Au chapitre 1, nous observons des compositions distinctes de diatomées et de communautés procaryotes parmi les principales zones océaniques. Des relations significatives entre les changements de composition des diatomées et des procaryotes ont été trouvées. Au ... Doctoral or Postdoctoral Thesis Southern Ocean Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Diatoms Prokaryotes Interactions Southern Ocean Kerguelen plateau Diversity Diatomées Procaryotes Interaction Océan Austral Kerguelen Séquençage [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
Diatoms Prokaryotes Interactions Southern Ocean Kerguelen plateau Diversity Diatomées Procaryotes Interaction Océan Austral Kerguelen Séquençage [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Liu, Yan Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
topic_facet |
Diatoms Prokaryotes Interactions Southern Ocean Kerguelen plateau Diversity Diatomées Procaryotes Interaction Océan Austral Kerguelen Séquençage [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
The interplay among microorganisms profoundly impacts biogeochemical cycles in the ocean. However, the questions of how microbes associated with each other on the spatial and temporal scale, and whether the associations of diatom-prokaryote and of DOM-prokaryote affect the distributions of these three components are open. In chapter 1, we observed distinct compositions of diatom and prokaryotic communities among the major ocean zones. Significant relationships between compositional changes of diatoms and of prokaryotes were found. In chapter 2, we observed two consecutive phytoplankton blooms, each composed of distinct diatom assemblages. Using network analysis, we identified two groups of diatoms representative of the spring and summer bloom, respectively, that had opposite correlation patterns with prokaryotic taxa. In chapter 3, we found the distinct composition of DOM and that of total and active prokaryotes on and off the plateau. The DOM-prokaryote correlations were overall stronger on the plateau than that off the plateau. The key active prokaryotic groups that strongly correlated with DOM were qualitatively similar in both ecosystems and quantitatively higher on the plateau. Taken together, our results demonstrate the significant associations between diatoms and prokaryotes, and between prokaryotes and DOM. The compositions of prokaryotic communities are influenced by both diatoms and DOM. L’interaction entre les micro-organismes a de profondes répercussions sur les cycles biogéochimiques de l’océan. Cependant, la question de savoir comment les microbes s’associent les uns aux autres aux échelles spatiale et temporelle et si les associations de diatom-procaryote et de DOM-procaryote affectent la distribution de ces trois composants est ouverte. Au chapitre 1, nous observons des compositions distinctes de diatomées et de communautés procaryotes parmi les principales zones océaniques. Des relations significatives entre les changements de composition des diatomées et des procaryotes ont été trouvées. Au ... |
author2 |
Laboratoire d'Océanographie Microbienne (LOMIC) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Sorbonne Université Ingrid Obernosterer |
format |
Doctoral or Postdoctoral Thesis |
author |
Liu, Yan |
author_facet |
Liu, Yan |
author_sort |
Liu, Yan |
title |
Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
title_short |
Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
title_full |
Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
title_fullStr |
Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
title_full_unstemmed |
Spatial and temporal patterns in diatom-prokaryote associations in the Southern Ocean |
title_sort |
spatial and temporal patterns in diatom-prokaryote associations in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://theses.hal.science/tel-03139883 https://theses.hal.science/tel-03139883/document https://theses.hal.science/tel-03139883/file/2019SORUS213.pdf |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
https://theses.hal.science/tel-03139883 Ecosystems. Sorbonne Université, 2019. English. ⟨NNT : 2019SORUS213⟩ |
op_relation |
NNT: 2019SORUS213 tel-03139883 https://theses.hal.science/tel-03139883 https://theses.hal.science/tel-03139883/document https://theses.hal.science/tel-03139883/file/2019SORUS213.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1781706843488256000 |