Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas
In recent years, environmental changes have had a significant impact on the health of marine organisms, resulting in considerable economic losses, particularly for molluscs. A striking example of this problem is the Pacific Oyster Mortality Syndrome (POMS), a disease causing production losses of Cra...
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ftsorbonneuniv:oai:HAL:tel-04678765v1 2024-09-15T18:03:05+00:00 Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas Effet des procédés photo-oxydatifs sur les interactions entre les communautés microbiennes et l'huître creuse Crassostrea gigas Blanchon, Cécile Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM) PIERRE FABRE-EDF (EDF)-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) Université de Perpignan Christophe Calvayrac Gaël Plantard 2023-12-08 https://theses.hal.science/tel-04678765 https://theses.hal.science/tel-04678765/document https://theses.hal.science/tel-04678765/file/These_Blanchon_Cecile_2023.pdf fr fre HAL CCSD NNT: 2023PERP0047 tel-04678765 https://theses.hal.science/tel-04678765 https://theses.hal.science/tel-04678765/document https://theses.hal.science/tel-04678765/file/These_Blanchon_Cecile_2023.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-04678765 Biologie animale. Université de Perpignan, 2023. Français. ⟨NNT : 2023PERP0047⟩ Vibrio harveyi & Ostreid Herpes Virus 1 Modeling Heterogenenous photocatalysis Interaction & Processes Microbial communities Crassostrea gigas Modelisation Photocatalyse hétérogène Interactions & Procédés Communautés microbiennes [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/doctoralThesis Theses 2023 ftsorbonneuniv 2024-08-30T00:00:52Z In recent years, environmental changes have had a significant impact on the health of marine organisms, resulting in considerable economic losses, particularly for molluscs. A striking example of this problem is the Pacific Oyster Mortality Syndrome (POMS), a disease causing production losses of Crassostrea gigas oysters of up to 80%. The disease is complex, involving both a viral infection by Ostreid Herpes Virus 1 (OsHV-1 µVar) and several bacterial infections, mainly by bacteria of the Vibrio genus. To improve water quality, aquaculture facilities use disinfection methods such as UVC irradiation or filtration. However, none of these processes can treat both pathogens and abiotic pollutants that can affect oyster health. My thesis focuses on the study of a process called heterogeneous photocatalysis that uses the solar resource. This process has the potential to effectively treat seawater by eliminating both biotic (viruses, bacteria) and abiotic contaminants (organic compounds). It is based on the use of titanium dioxide (TiO2) as a catalyst. This research work was divided into several stages. Firstly, the ability of photocatalysis to inactivate target pathogens was investigated, using OsHV-1 μVar virus and Vibrio harveyi bacteria as study models. The impact of the process on oyster health and water microbial communities was characterized. Next, bacterial inactivation was modeled to understand how weather conditions and geographic location could influence its efficiency. Finally, the feasibility of photocatalysis in seawater for the disinfection of oyster pathogens was demonstrated. This works offers new avenues for developing an innovative and eco-responsible solution for securing aquaculture facilities. Au cours des dernières années, les changements environnementaux ont eu un impact significatif sur la santé des organismes marins, entraînant des pertes économiques considérables et en particulier pour les mollusques. Un exemple frappant de cette problématique est le "Pacific Oyster Mortality Syndrome” ... Doctoral or Postdoctoral Thesis Crassostrea gigas Pacific oyster HAL Sorbonne Université |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
French |
topic |
Vibrio harveyi & Ostreid Herpes Virus 1 Modeling Heterogenenous photocatalysis Interaction & Processes Microbial communities Crassostrea gigas Modelisation Photocatalyse hétérogène Interactions & Procédés Communautés microbiennes [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
Vibrio harveyi & Ostreid Herpes Virus 1 Modeling Heterogenenous photocatalysis Interaction & Processes Microbial communities Crassostrea gigas Modelisation Photocatalyse hétérogène Interactions & Procédés Communautés microbiennes [SDV.BA]Life Sciences [q-bio]/Animal biology Blanchon, Cécile Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
topic_facet |
Vibrio harveyi & Ostreid Herpes Virus 1 Modeling Heterogenenous photocatalysis Interaction & Processes Microbial communities Crassostrea gigas Modelisation Photocatalyse hétérogène Interactions & Procédés Communautés microbiennes [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
In recent years, environmental changes have had a significant impact on the health of marine organisms, resulting in considerable economic losses, particularly for molluscs. A striking example of this problem is the Pacific Oyster Mortality Syndrome (POMS), a disease causing production losses of Crassostrea gigas oysters of up to 80%. The disease is complex, involving both a viral infection by Ostreid Herpes Virus 1 (OsHV-1 µVar) and several bacterial infections, mainly by bacteria of the Vibrio genus. To improve water quality, aquaculture facilities use disinfection methods such as UVC irradiation or filtration. However, none of these processes can treat both pathogens and abiotic pollutants that can affect oyster health. My thesis focuses on the study of a process called heterogeneous photocatalysis that uses the solar resource. This process has the potential to effectively treat seawater by eliminating both biotic (viruses, bacteria) and abiotic contaminants (organic compounds). It is based on the use of titanium dioxide (TiO2) as a catalyst. This research work was divided into several stages. Firstly, the ability of photocatalysis to inactivate target pathogens was investigated, using OsHV-1 μVar virus and Vibrio harveyi bacteria as study models. The impact of the process on oyster health and water microbial communities was characterized. Next, bacterial inactivation was modeled to understand how weather conditions and geographic location could influence its efficiency. Finally, the feasibility of photocatalysis in seawater for the disinfection of oyster pathogens was demonstrated. This works offers new avenues for developing an innovative and eco-responsible solution for securing aquaculture facilities. Au cours des dernières années, les changements environnementaux ont eu un impact significatif sur la santé des organismes marins, entraînant des pertes économiques considérables et en particulier pour les mollusques. Un exemple frappant de cette problématique est le "Pacific Oyster Mortality Syndrome” ... |
author2 |
Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM) PIERRE FABRE-EDF (EDF)-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) Université de Perpignan Christophe Calvayrac Gaël Plantard |
format |
Doctoral or Postdoctoral Thesis |
author |
Blanchon, Cécile |
author_facet |
Blanchon, Cécile |
author_sort |
Blanchon, Cécile |
title |
Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
title_short |
Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
title_full |
Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
title_fullStr |
Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
title_full_unstemmed |
Effect of photo-oxidative processes on interactions between microbial communities and the oyster Crassostrea gigas |
title_sort |
effect of photo-oxidative processes on interactions between microbial communities and the oyster crassostrea gigas |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://theses.hal.science/tel-04678765 https://theses.hal.science/tel-04678765/document https://theses.hal.science/tel-04678765/file/These_Blanchon_Cecile_2023.pdf |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
https://theses.hal.science/tel-04678765 Biologie animale. Université de Perpignan, 2023. Français. ⟨NNT : 2023PERP0047⟩ |
op_relation |
NNT: 2023PERP0047 tel-04678765 https://theses.hal.science/tel-04678765 https://theses.hal.science/tel-04678765/document https://theses.hal.science/tel-04678765/file/These_Blanchon_Cecile_2023.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1810440612164403200 |