Terraneo T. I. auteur aut IRD Houlbrèque Fanny auteur aut IRD Arrigoni R. auteur aut IRD Longari B. auteur aut IRD Berumen M. L. auteur aut IRD Hume B. C. C. auteur aut IRD Fiat Sylvie auteur aut IRD Rodolfo-Metalpa Riccardo auteur aut IRD Payri Claude auteur aut IRD Voolstra C. R. auteur aut IRD Benzoni Francesca auteur aut IRD text journalArticle eng text/pdf born digital access The ecological success of shallow water corals hinges on their association with photosynthetic Symbiodiniaceae algae. This is affected by environmental drivers among which sea temperature is pivotal. In 2016, a prolonged heat wave challenged New Caledonia reefs triggering a severe bleaching event. Here, we tracked 72 coral colonies comprising two species of Pocillopora and Porites from a cross-shelf gradient during the event and subsequent recovery period. Symbiodiniaceae association over time was assessed using the ITS2 marker. Bleaching prevalence and photosynthetic efficiency showed that 83% of Pocillopora and 29% of Porites colonies were affected, with corals from a mid-shelf site having been most impacted. The majority of tracked colonies recovered by December 2016, with a recorded 33% mortality of Pocillopora, while Porites showed higher resilience. Consistent with previous studies, genotyping data suggest stable, species- and site-specific associations between corals and Symbiodiniaceae. specialized Symbiodiniaceae Coral bleaching Species-specificity Next-generation sequencing ITS2 SymPortal NOUVELLE CALEDONIE 036 082 034 [Early access] [6 p.] 2024 0722-4028 https://www.documentation.ird.fr/hor/fdi:010090707 10.1007/s00338-024-02510-y 0722-4028 [F B010090707] https://www.documentation.ird.fr/hor/fdi:010090707 https://www.documentation.ird.fr/intranet/publi/2024-07/010090707.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2024-07-10 2024-07-10 fdi:010090707 fre