{"id":14266,"date":"2024-10-17T10:07:12","date_gmt":"2024-10-17T08:07:12","guid":{"rendered":"https:\/\/lpg-umr6112.fr\/?post_type=tribe_events&p=14266"},"modified":"2024-11-25T11:41:38","modified_gmt":"2024-11-25T10:41:38","slug":"soutenance-de-these-de-maxime-daviray","status":"publish","type":"tribe_events","link":"https:\/\/lpg-umr6112.fr\/en\/event\/soutenance-de-these-de-maxime-daviray\/","title":{"rendered":"Soutenance de th\u00e8se “Fonctionnement biog\u00e9ochimique des \u00e9cosyst\u00e8mes transitionnels colonis\u00e9s par les bact\u00e9ries filamentaires \u00e9lectriques : r\u00e9ponse des bioc\u00e9noses et thanatoc\u00e9noses de foraminif\u00e8res benthiques” par Maxime Daviray"},"content":{"rendered":"
R\u00e9sum\u00e9 :<\/b>\u00a0L\u2019objectif de cette th\u00e8se est d\u2019\u00e9valuer l\u2019effet de l\u2019acidification provoqu\u00e9e par l\u2019activit\u00e9 des cable bacteria<\/i>\u00a0sur la g\u00e9ochimie du s\u00e9diment des environnements intertidaux, et les cons\u00e9quences de ce processus de dissolution sur les communaut\u00e9s de foraminif\u00e8res benthiques et la pr\u00e9servation de leur test dans les s\u00e9diments. Cette \u00e9tude combine des campagnes de suivis de vasi\u00e8res intertidales dans diff\u00e9rents estuaires de la fa\u00e7ade atlantique et de la Manche (France) par des approches \u00e0 haute r\u00e9solutions. L\u2019activit\u00e9 des cable bacteria<\/i>\u00a0pr\u00e9sente une variabilit\u00e9 saisonni\u00e8re, avec un maximum d\u2019activit\u00e9 durant la p\u00e9riode \u00e9t\u00e9-automne, et tend \u00e0 fortement structurer la succession verticale des zones oxique-suboxique-anoxique.\u00a0 La bioturbation associ\u00e9e \u00e0 la macrofaune ou au r\u00e9seau racinaire des zost\u00e8res introduit de l\u2019h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 lat\u00e9rale dans la g\u00e9ochimie et g\u00e9n\u00e9rer des microhabitats. L\u2019effet structurant du pH sur la distribution successive des diff\u00e9rentes esp\u00e8ces de foraminif\u00e8res dans le s\u00e9diment a \u00e9t\u00e9 mise en \u00e9vidence. La r\u00e9ponse des foraminif\u00e8res \u00e0 l\u2019acidification de leur environnement apparait esp\u00e8ce-d\u00e9pendante et implique autant leur particularit\u00e9 m\u00e9tabolique que comportementale. L\u2019activit\u00e9 des cable bacteria<\/i> engendre une perte importante des tests carbonat\u00e9s dans l\u2019enregistrement s\u00e9dimentaire. Leur temps de r\u00e9sidence est estim\u00e9 \u00e0 une douzaine de jours. L\u2019accumulation de tests agglutin\u00e9s et de membranes organiques plus que de tests carbonat\u00e9s pourraient \u00eatre utilis\u00e9s pour fournir une revue historique des processus de dissolution dans les s\u00e9diments marins.<\/div>\n
Horaire et lieu : <\/b>Le mercredi 11 d\u00e9cembre \u00e0 14h, amphi L003, b\u00e2t L, Facult\u00e9 des Science d’Angers<\/div>\n
<\/div>\n
Jury :\u00a0<\/b><\/div>\n
Pr\u00e9sidente : Meryem Mojtahid
\nRapporteur\u00b7rice\u00b7s : Anniet Laverman et Vincent Bouchet
\nExaminateur\u00b7rice\u00b7s : Florian Cesbron et Filip Meysman<\/div>\n
Invit\u00e9 : Nils Risgaard-Petersen<\/div>\n","protected":false},"excerpt":{"rendered":"

R\u00e9sum\u00e9 :\u00a0L\u2019objectif de cette th\u00e8se est d\u2019\u00e9valuer l\u2019effet de l\u2019acidification provoqu\u00e9e par l\u2019activit\u00e9 des cable bacteria\u00a0sur la g\u00e9ochimie du s\u00e9diment des environnements intertidaux, et les cons\u00e9quences de ce processus de […]<\/p>\n","protected":false},"author":3,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_tribe_events_status":"","_tribe_events_status_reason":"","_tribe_events_is_hybrid":"","_tribe_events_is_virtual":"","_tribe_events_virtual_video_source":"","_tribe_events_virtual_embed_video":"","_tribe_events_virtual_linked_button_text":"","_tribe_events_virtual_linked_button":"","_tribe_events_virtual_show_embed_at":"","_tribe_events_virtual_show_embed_to":[],"_tribe_events_virtual_show_on_event":"","_tribe_events_virtual_show_on_views":"","_tribe_events_virtual_url":"","footnotes":"","_tec_slr_enabled":"","_tec_slr_layout":""},"tags":[],"tribe_events_cat":[23],"coauthors":[96],"class_list":["post-14266","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-evenements","cat_evenements"],"acf":[],"ticketed":false,"_links":{"self":[{"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tribe_events\/14266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/users\/3"}],"version-history":[{"count":2,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tribe_events\/14266\/revisions"}],"predecessor-version":[{"id":14893,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tribe_events\/14266\/revisions\/14893"}],"wp:attachment":[{"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/media?parent=14266"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tags?post=14266"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/tribe_events_cat?post=14266"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/lpg-umr6112.fr\/en\/wp-json\/wp\/v2\/coauthors?post=14266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}