{"id":9513,"date":"2024-12-12T11:47:44","date_gmt":"2024-12-12T21:47:44","guid":{"rendered":"https:\/\/recherche.upf.pf\/?post_type=evenement&p=9513"},"modified":"2024-12-12T11:47:49","modified_gmt":"2024-12-12T21:47:49","slug":"soutenance-de-these-direne-godere","status":"publish","type":"evenement","link":"https:\/\/recherche.upf.pf\/en\/evenement\/soutenance-de-these-direne-godere\/","title":{"rendered":"Soutenance de th\u00e8se d’Ir\u00e8ne Godere"},"content":{"rendered":"

Sorry, this entry is only available in Fran\u00e7ais<\/a>.<\/p>

Soutenance de th\u00e8se en doctorat de l\u2019\u00c9cole Doctorale du Pacifique d’Ir\u00e8ne GODERE : Evaluation in situ de la contamination en microplastiques et \u00e9l\u00e9ments traces m\u00e9talliques chez le b\u00e9nitier Tridacna maxima au sein de diff\u00e9rents lagons de Polyn\u00e9sie fran\u00e7aise – vendredi 13 d\u00e9cembre 2024 \u00e0 8h30 \u00e0 la Station marine d’Arcachon.<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
    \n
  • D\u00e9partement :\u00a0<\/strong>Sciences et technologie<\/li>\n\n\n\n
  • Discipline :\u00a0<\/strong>Sciences agronomiques et \u00e9cologique, CNU n\u00b067<\/li>\n\n\n\n
  • Sp\u00e9cialit\u00e9 :\u00a0<\/strong>Biologie des population et \u00e9cologie<\/li>\n<\/ul>\n\n\n\n

    R\u00e9sum\u00e9 de la th\u00e8se <\/h3>\n\n\n\n

    Depuis la r\u00e9volution industrielle et notamment ces derni\u00e8res d\u00e9cennies, l\u2019Homme joue un r\u00f4le majeur dans la modification de son environnement. Parmi les multiples pressions anthropiques actuelles, les pollutions chimiques sont particuli\u00e8rement n\u00e9fastes pour la sant\u00e9 humaine et des \u00e9cosyst\u00e8mes, en raison de leur persistance et toxicit\u00e9. Le milieu marin, r\u00e9ceptacle final des contaminations, est notamment concern\u00e9.<\/p>\n\n\n\n

    Les \u00e9l\u00e9ments traces m\u00e9talliques (ETMs) sont parmi les polluants les plus fr\u00e9quemment retrouv\u00e9s \u00e0 fortes concentrations, et dont certains sont parmi les substances les plus toxiques (ex As, Cd, Pb, Hg). A cela s’ajoute les plastiques, dont 8 millions de tonnes atteignent les oc\u00e9ans chaque ann\u00e9e et sont principalement sous forme de microplastiques (MPs), soit d’une taille inf\u00e9rieure \u00e0 5 mm. Cependant ces polluants sont difficiles \u00e0 d\u00e9tecter dans la colonne d’eau en raison de leur faible concentration en g\u00e9n\u00e9ral, et de leur forte variabilit\u00e9 spatio-temporelle. Ainsi des mesures indirectes via l\u2019utilisation de bioindicateurs des contaminations permettent de les caract\u00e9riser (notamment pour les ETMs). Les s\u00e9diments peuvent \u00e9galement \u00eatre compl\u00e9mentaires du biote dans certains r\u00e9seaux de surveillance. En Polyn\u00e9sie fran\u00e7aise (PF), l\u2019esp\u00e8ce T. maxima, gr\u00e2ce \u00e0 ses capacit\u00e9s de bioaccumulation en MPs et ETMs ainsi que son abondance, est un bon candidat pour cette approche.<\/p>\n\n\n\n

    Cette th\u00e8se a donc \u00e9tudi\u00e9 l\u2019utilisation du b\u00e9nitier in situ comme bioindicateur des contaminations en MPs et ETMs en PF, sur cinq \u00eeles \u00e0 degr\u00e9 d’anthropisation variable. Premi\u00e8rement, un protocole d\u2019analyse des MPs a \u00e9t\u00e9 d\u00e9velopp\u00e9. Puis l\u2019\u00e9tude de ces contaminations a permis d\u2019identifier les organes pertinents pour la biosurveillance, de r\u00e9v\u00e9ler des niveaux en MPs et ETMs pr\u00e9occupants et d\u2019identifier les potentielles activit\u00e9s locales polluantes.<\/p>\n\n\n\n

    Ce travail a \u00e9galement permis d’\u00e9valuer la compl\u00e9mentarit\u00e9 des s\u00e9diments par rapport au b\u00e9nitier, tout en consid\u00e9rant l\u2019innocuit\u00e9 de sa consommation (au regard des ETMs). Ces r\u00e9sultats montrent l\u2019int\u00e9r\u00eat du b\u00e9nitier comme outil de biosurveillance en PF, et ouvrent des perspectives pour l’utilisation de cette esp\u00e8ce dans des strat\u00e9gies de biosurveillance au long terme.<\/p>\n\n\n\n

    Composition du jury<\/h3>\n\n\n\n
      \n
    • Dr Fran\u00e7ois GALGANI, Responsable de projet HDR – UMR 241 SECOPOL – Ifremer,\u00a0Rapporteur<\/strong><\/li>\n\n\n\n
    • Pr Val\u00e9rie LANGLOIS, Professeure des universit\u00e9s – Laboratoire ADN\/ARN – INRS-ETE de Qu\u00e9bec,\u00a0Rapporteure\u00a0<\/strong><\/li>\n\n\n\n
    • Pr Paco BUSTAMANTE, Proefesseur des universit\u00e9s – UMR-LIENSs – La Rochelle Universit\u00e9,\u00a0Examinateur\u00a0<\/strong><\/li>\n\n\n\n
    • Dr Oihana LATCHERE, Maitre de conf\u00e9rences – Laboratoire BIOSSE – Universit\u00e9 catholique de l’Ouest,\u00a0Examinatrice<\/strong><\/li>\n\n\n\n
    • Pr Denis FICHET, Ma\u00eetre de conf\u00e9rence – UMR-LIENSs – La Rochelle Universit\u00e9,\u00a0Examinateur<\/strong><\/li>\n\n\n\n
    • Pr Magalie BAUDRIMONT, Professeure des universit\u00e9s – UMR EPOC 5805 – Universit\u00e9 de Bordeaux,\u00a0Co-directrice de th\u00e8se<\/strong><\/li>\n\n\n\n
    • Pr Nabila GAERTNER-MAZOUNI, Professeure des universit\u00e9s – UMR 241 SECOPOL – UPF,\u00a0Directrice de th\u00e8se\u00a0<\/strong><\/li>\n<\/ul>\n\n\n\n

      <\/p>","protected":false},"author":253,"featured_media":0,"template":"","coauthors":[499],"class_list":["post-9513","evenement","type-evenement","status-publish","hentry","entry"],"acf":[],"yoast_head":"\nSoutenance de th\u00e8se d'Ir\u00e8ne Godere • Recherche UPF<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/recherche.upf.pf\/en\/evenement\/soutenance-de-these-direne-godere\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soutenance de th\u00e8se d'Ir\u00e8ne Godere • Recherche UPF\" \/>\n<meta property=\"og:description\" content=\"Sorry, this entry is only available in Fran\u00e7ais. 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