Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus
The oyster Crassostrea gigas is the most cultured species of bivalve in the world and is confronted with infectious diseases involving bacteria of the genus Vibrio. Among these Vibrio, the species V. aestuarianus, initially described in 1983 as a bacterium of estuarine environments, has been associa...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://theses.hal.science/tel-04267633 https://theses.hal.science/tel-04267633/document https://theses.hal.science/tel-04267633/file/2022Mesnil204502.pdf |
id |
ftccsdartic:oai:HAL:tel-04267633v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:tel-04267633v1 2023-12-03T10:21:42+01:00 Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus Émergence, dynamique évolutive et écologie de lignées pathogènes de bivalves marins au sein de l’espèce bactérienne Vibrio aestuarianus Mesnil, Aurélie Adaptation et Santé des Invertébrés Marins (ASIM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Université de La Rochelle Delphine Destoumieux-Garzón Marie-Agnès Travers 2022-10-11 https://theses.hal.science/tel-04267633 https://theses.hal.science/tel-04267633/document https://theses.hal.science/tel-04267633/file/2022Mesnil204502.pdf fr fre HAL CCSD NNT: 2022LAROS050 tel-04267633 https://theses.hal.science/tel-04267633 https://theses.hal.science/tel-04267633/document https://theses.hal.science/tel-04267633/file/2022Mesnil204502.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-04267633 Sciences agricoles. Université de La Rochelle, 2022. Français. ⟨NNT : 2022LAROS050⟩ Vibrio aestuarianus Emergence Evolutionary dynamics Ecological niche Émergence Dynamique évolutive Niche écologique [SDV.SA]Life Sciences [q-bio]/Agricultural sciences [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/doctoralThesis Theses 2022 ftccsdartic 2023-11-04T23:28:24Z The oyster Crassostrea gigas is the most cultured species of bivalve in the world and is confronted with infectious diseases involving bacteria of the genus Vibrio. Among these Vibrio, the species V. aestuarianus, initially described in 1983 as a bacterium of estuarine environments, has been associated with mortality of adult oysters in Europe since 2001. In 2012, mortality of adult cockles Cerastoderma edule associated with this species have also been reported. However, the processes leading to the emergence of pathogenic bivalve lineages have remained unknown. During this thesis, we sought to clarify (1) the population structure of V. aestuarianus and their genomic determinants, (2) the evolutionary events that participated in the emergence and evolution of the subspecies, and (3) the habitats, cycles and species sensitive toV. aestuarianus. We have shown that pathogenic V. aestuarianus strains fall into two subspecies withdifferent evolutionary histories. V. aestuarianus francensis, described in 2008, includes pathogenic oyster strains while V. aestuarianus cardii includes pathogenic cockle strains. Both subspecies cause disease in their host populations in summer, and temperature has been identified as a favorable factor for disease development. V. aestuarianus francensis impacts oyster farming and we show that two distinct lineages have spread across Europe for at least 20 years. This subspecies is characterized by low genetic diversity and essentially clonal evolution. Strains of V. aestuarianus francensis have a specialist lifestyle, with a habitat restricted to oysters. One of the events that favored its emergence could be the acquisition and genomic integration of a mobile genetic element containing genes coding for proteins involved in copper export. Currently, the subspecies V. aestuarianus cardii impacts cockles only in France. The phenotypic and genetic diversity in this subspecies is greater than in the subspecies V. aestuarianus francensis. Several genetic groups with different levels of virulence ... Doctoral or Postdoctoral Thesis Crassostrea gigas Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Vibrio aestuarianus Emergence Evolutionary dynamics Ecological niche Émergence Dynamique évolutive Niche écologique [SDV.SA]Life Sciences [q-bio]/Agricultural sciences [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
Vibrio aestuarianus Emergence Evolutionary dynamics Ecological niche Émergence Dynamique évolutive Niche écologique [SDV.SA]Life Sciences [q-bio]/Agricultural sciences [SDV.BA]Life Sciences [q-bio]/Animal biology Mesnil, Aurélie Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
topic_facet |
Vibrio aestuarianus Emergence Evolutionary dynamics Ecological niche Émergence Dynamique évolutive Niche écologique [SDV.SA]Life Sciences [q-bio]/Agricultural sciences [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
The oyster Crassostrea gigas is the most cultured species of bivalve in the world and is confronted with infectious diseases involving bacteria of the genus Vibrio. Among these Vibrio, the species V. aestuarianus, initially described in 1983 as a bacterium of estuarine environments, has been associated with mortality of adult oysters in Europe since 2001. In 2012, mortality of adult cockles Cerastoderma edule associated with this species have also been reported. However, the processes leading to the emergence of pathogenic bivalve lineages have remained unknown. During this thesis, we sought to clarify (1) the population structure of V. aestuarianus and their genomic determinants, (2) the evolutionary events that participated in the emergence and evolution of the subspecies, and (3) the habitats, cycles and species sensitive toV. aestuarianus. We have shown that pathogenic V. aestuarianus strains fall into two subspecies withdifferent evolutionary histories. V. aestuarianus francensis, described in 2008, includes pathogenic oyster strains while V. aestuarianus cardii includes pathogenic cockle strains. Both subspecies cause disease in their host populations in summer, and temperature has been identified as a favorable factor for disease development. V. aestuarianus francensis impacts oyster farming and we show that two distinct lineages have spread across Europe for at least 20 years. This subspecies is characterized by low genetic diversity and essentially clonal evolution. Strains of V. aestuarianus francensis have a specialist lifestyle, with a habitat restricted to oysters. One of the events that favored its emergence could be the acquisition and genomic integration of a mobile genetic element containing genes coding for proteins involved in copper export. Currently, the subspecies V. aestuarianus cardii impacts cockles only in France. The phenotypic and genetic diversity in this subspecies is greater than in the subspecies V. aestuarianus francensis. Several genetic groups with different levels of virulence ... |
author2 |
Adaptation et Santé des Invertébrés Marins (ASIM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Université de La Rochelle Delphine Destoumieux-Garzón Marie-Agnès Travers |
format |
Doctoral or Postdoctoral Thesis |
author |
Mesnil, Aurélie |
author_facet |
Mesnil, Aurélie |
author_sort |
Mesnil, Aurélie |
title |
Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
title_short |
Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
title_full |
Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
title_fullStr |
Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
title_full_unstemmed |
Emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species Vibrio aestuarianus |
title_sort |
emergence, evolutionary dynamics and ecology of pathogenic lineages of marine bivalves within the bacterial species vibrio aestuarianus |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://theses.hal.science/tel-04267633 https://theses.hal.science/tel-04267633/document https://theses.hal.science/tel-04267633/file/2022Mesnil204502.pdf |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
https://theses.hal.science/tel-04267633 Sciences agricoles. Université de La Rochelle, 2022. Français. ⟨NNT : 2022LAROS050⟩ |
op_relation |
NNT: 2022LAROS050 tel-04267633 https://theses.hal.science/tel-04267633 https://theses.hal.science/tel-04267633/document https://theses.hal.science/tel-04267633/file/2022Mesnil204502.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784269494826303488 |