Diversity and community composition of active microbial communities in southern high latitude ecosystems
Southern high latitudes marine ecosystems (HLME) are highly sensitive to climate change, impacting physical, chemical, and biological processes, however, their prominent role in climate modulation and water masses circulation, contrast with the relatively low number of studies on their functioning....
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2021
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ftccsdartic:oai:HAL:tel-03420826v1 2023-05-15T18:25:22+02:00 Diversity and community composition of active microbial communities in southern high latitude ecosystems Diversité et composition des communautés microbiennes actives dans les écosystèmes des hautes latitudes méridionales Maturana Martínez, Claudia Laboratoire d'Ecogéochimie des environnements benthiques (LECOB) 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 Universidad austral de Chile Pierre E. Galand Humberto González 2021-05-10 https://tel.archives-ouvertes.fr/tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826/document https://tel.archives-ouvertes.fr/tel-03420826/file/MATURANA_Claudia_these_2021.pdf en eng HAL CCSD NNT: 2021SORUS134 tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826/document https://tel.archives-ouvertes.fr/tel-03420826/file/MATURANA_Claudia_these_2021.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-03420826 Populations and Evolution [q-bio.PE]. Sorbonne Université; Universidad austral de Chile, 2021. English. ⟨NNT : 2021SORUS134⟩ Southern high latitude marine ecosystems Bacterioplankton 16S rRNA Chilean Patagonia Southern Ocean Fjords Écosystèmes marins des hautes latitudes australes Bactérioplancton ARNr 16S Patagonie chilienne Océan austral [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/doctoralThesis Theses 2021 ftccsdartic 2022-01-08T23:56:35Z Southern high latitudes marine ecosystems (HLME) are highly sensitive to climate change, impacting physical, chemical, and biological processes, however, their prominent role in climate modulation and water masses circulation, contrast with the relatively low number of studies on their functioning. Relatively few studies on bacterioplankton community structure have been reported for southern Chilean Patagonia and for the Southern Ocean (SO) on a large scale, and none have targeted the active fraction of the bacterioplankton community. We used 16S rRNA sequencing to analyze and describe the community structure of the active bacterioplankton communities in southern HLME. The main objective of this thesis was to characterize de diversity and abundance of bacterioplankton communities along environmental and geographical gradients in southern HLME. First, we investigated whether nearby fjords of the southern Chilean Patagonia, with similar climate and location but different freshwater inflows, had different communities. Second, we investigated interannual changes experienced by the bacterioplankton community of the Yendegaia fjord. Third, we examined the large-scale spatial structure of the bacterioplankton community along a transect across the Pacific sector of the SO. Ours results show that southern polar bacterioplanktonic communities are structured according to physical, chemical, and biological parameters characteristic of the area. In addition, we also demonstrated that changes in environmental, spatial, and temporal parameters affect the structure of bacterioplanktonic communities. Thus, highlighting the importance of microbial ecology studies in areas sensitive to global climate change such as southern HLME. Les écosystèmes marins des hautes latitudes méridionales (HLME) sont très sensibles au changement climatique, ayant un impact sur les processus physiques, chimiques et biologiques. Cependant, leur rôle important dans la modulation du climat et la circulation des masses d'eau contraste avec le nombre ... Doctoral or Postdoctoral Thesis Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Austral Pacific Patagonia Southern Ocean |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Southern high latitude marine ecosystems Bacterioplankton 16S rRNA Chilean Patagonia Southern Ocean Fjords Écosystèmes marins des hautes latitudes australes Bactérioplancton ARNr 16S Patagonie chilienne Océan austral [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
spellingShingle |
Southern high latitude marine ecosystems Bacterioplankton 16S rRNA Chilean Patagonia Southern Ocean Fjords Écosystèmes marins des hautes latitudes australes Bactérioplancton ARNr 16S Patagonie chilienne Océan austral [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] Maturana Martínez, Claudia Diversity and community composition of active microbial communities in southern high latitude ecosystems |
topic_facet |
Southern high latitude marine ecosystems Bacterioplankton 16S rRNA Chilean Patagonia Southern Ocean Fjords Écosystèmes marins des hautes latitudes australes Bactérioplancton ARNr 16S Patagonie chilienne Océan austral [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
description |
Southern high latitudes marine ecosystems (HLME) are highly sensitive to climate change, impacting physical, chemical, and biological processes, however, their prominent role in climate modulation and water masses circulation, contrast with the relatively low number of studies on their functioning. Relatively few studies on bacterioplankton community structure have been reported for southern Chilean Patagonia and for the Southern Ocean (SO) on a large scale, and none have targeted the active fraction of the bacterioplankton community. We used 16S rRNA sequencing to analyze and describe the community structure of the active bacterioplankton communities in southern HLME. The main objective of this thesis was to characterize de diversity and abundance of bacterioplankton communities along environmental and geographical gradients in southern HLME. First, we investigated whether nearby fjords of the southern Chilean Patagonia, with similar climate and location but different freshwater inflows, had different communities. Second, we investigated interannual changes experienced by the bacterioplankton community of the Yendegaia fjord. Third, we examined the large-scale spatial structure of the bacterioplankton community along a transect across the Pacific sector of the SO. Ours results show that southern polar bacterioplanktonic communities are structured according to physical, chemical, and biological parameters characteristic of the area. In addition, we also demonstrated that changes in environmental, spatial, and temporal parameters affect the structure of bacterioplanktonic communities. Thus, highlighting the importance of microbial ecology studies in areas sensitive to global climate change such as southern HLME. Les écosystèmes marins des hautes latitudes méridionales (HLME) sont très sensibles au changement climatique, ayant un impact sur les processus physiques, chimiques et biologiques. Cependant, leur rôle important dans la modulation du climat et la circulation des masses d'eau contraste avec le nombre ... |
author2 |
Laboratoire d'Ecogéochimie des environnements benthiques (LECOB) 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 Universidad austral de Chile Pierre E. Galand Humberto González |
format |
Doctoral or Postdoctoral Thesis |
author |
Maturana Martínez, Claudia |
author_facet |
Maturana Martínez, Claudia |
author_sort |
Maturana Martínez, Claudia |
title |
Diversity and community composition of active microbial communities in southern high latitude ecosystems |
title_short |
Diversity and community composition of active microbial communities in southern high latitude ecosystems |
title_full |
Diversity and community composition of active microbial communities in southern high latitude ecosystems |
title_fullStr |
Diversity and community composition of active microbial communities in southern high latitude ecosystems |
title_full_unstemmed |
Diversity and community composition of active microbial communities in southern high latitude ecosystems |
title_sort |
diversity and community composition of active microbial communities in southern high latitude ecosystems |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://tel.archives-ouvertes.fr/tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826/document https://tel.archives-ouvertes.fr/tel-03420826/file/MATURANA_Claudia_these_2021.pdf |
geographic |
Austral Pacific Patagonia Southern Ocean |
geographic_facet |
Austral Pacific Patagonia Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
https://tel.archives-ouvertes.fr/tel-03420826 Populations and Evolution [q-bio.PE]. Sorbonne Université; Universidad austral de Chile, 2021. English. ⟨NNT : 2021SORUS134⟩ |
op_relation |
NNT: 2021SORUS134 tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826 https://tel.archives-ouvertes.fr/tel-03420826/document https://tel.archives-ouvertes.fr/tel-03420826/file/MATURANA_Claudia_these_2021.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766206781398188032 |