{"id":6980,"date":"2023-11-03T09:45:16","date_gmt":"2023-11-03T08:45:16","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/fr\/felicitations-a-aina-astorch-cardona-meb-qui-a-soutenu-sa-these-le-30-octobre\/"},"modified":"2023-11-03T09:45:16","modified_gmt":"2023-11-03T08:45:16","slug":"congratulations-to-aina-astorch-cardona-meb-who-defended-her-thesis-on-30-october","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/felicitations-a-aina-astorch-cardona-meb-qui-a-soutenu-sa-these-le-30-octobre\/","title":{"rendered":"Congratulations to Aina Astorch-Cardona (MEB), who defended her thesis on 30 October."},"content":{"rendered":"<div id=\"basic-page-content\" class=\"page-content\">    <div class=\"content\">    <div class=\"container\">      <div class=\"row\">        <div class=\"col-xs-12\">                      <div class=\"container clearfix\">              <div class=\"row\">                <div class=\"col-xs-12\">                                  <\/div>              <\/div>            <\/div>                                <div class=\"body\">              <div class=\"field field-name-body field-type-text-with-summary field-label-hidden\"><div class=\"field-items\"><div class=\"field-item even\" property=\"content:encoded\"><p>On the following topic: \"Influence of environmental variations on the dynamics of microbial communities in iron-rich marine mats\".<\/p><p>The jury was made up of :<\/p><p>\u00a0<\/p><p>- Ms Maria Soledad GONI URRIZA (Associate Professor), Universit\u00e9 de Pau et des Pays de l'Adour<br>- Mr Karim BENZERARA (Research Director), IMPMC<br>- Ms Val\u00e9rie CHAVAGNAC (Research Director), GET<br>- Ms Patricia BONIN (Research Director), MIO<\/p><p>- Ms C\u00e9line ROMMEVAUX (Research Fellow), MIO<br>- Mr David EMERSON (Professor), Bigelow Laboratory for Ocean Sciences<\/p><p>Summary:<\/p><p>This thesis aims to understand the influence of environmental variations on the dynamics of microbial communities in iron-rich marine mats. To do this, we studied the microbial communities of mats developing in two environments that differ in terms of origin and iron concentration, the Lucky Strike hydrothermal field (LSHF) and the EMSO-Ligure West observatory (EMLIG), as well as those of the microbial colonisers. To analyse this diversity, we used metabarcoding of the 16S rRNA gene and quantified the abundance of different taxonomic groups (including Zetaproteobacteria) using qPCR or dPCR approaches. We coupled these analyses with geochemical data from hydrothermal fluids associated with LSHF mats, and studied the different morphologies of iron oxyhydroxides produced by Zetaproteobacteria using SEM. Our results suggest that the communities of iron-rich microbial mats in hydrothermal environments are influenced by the diffuse fluid that feeds them, which varies according to the composition of the associated hydrothermal fluids and the lithology of the bedrock on which they develop. In a non-hydrothermal context, bacterial communities are completely dependent on the type of substratum on which they form. Communities on metals or iron-containing minerals more closely resemble those associated with biocorrosion or mineral alteration, respectively. Finally, our results show that Zetaproteobacteria are key taxa in the creation of communities associated with iron-rich materials or environments, and that they are also influenced by the type of substrate on which they develop and by the age of the mats.<\/p><p>\u00a0<\/p><\/div><\/div><\/div>            <\/div>                            <\/div>      <\/div>    <\/div>  <\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Sur le sujet suivant : &#8220;Influence des variations environnementales sur la dynamique des communaut\u00e9s microbiennes des tapis marins riches en fer&#8221;.Le jury \u00e9tait compos\u00e9 de :\u00a0&#8211; Mme\u00a0Maria Soledad GONI URRIZA [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4489,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6980","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=6980"}],"version-history":[{"count":0,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6980\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/4489"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=6980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=6980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=6980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}