Sababadichetty L. auteur aut IRD Miltgen G. auteur aut IRD Vincent B. auteur aut IRD Guilhaumon François auteur aut IRD Lenoble V. auteur aut IRD Thibault M. auteur aut IRD Bureau S. auteur aut IRD Tortosa P. auteur aut IRD Bouvier T. auteur aut IRD Jourand Philippe auteur aut IRD text journalArticle eng text/pdf born digital access The increasing threats to ecosystems and humans from marine plastic pollution require a comprehensive assessment. We present a plastisphere case study from Reunion Island, a remote oceanic island located in the Southwest Indian Ocean, polluted by plastics. We characterized the plastic pollution on the island's coastal waters, described the associated microbiome, explored viable bacterial flora and the presence of antimicrobial resistant (AMR) bacteria. Reunion Island faces plastic pollution with up to 10,000 items/km2 in coastal water. These plastics host microbiomes dominated by Proteobacteria (80 %), including dominant genera such as Psychrobacter, Photobacterium, Pseudoalteromonas and Vibrio. Culturable microbiomes reach 107 CFU/g of microplastics, with dominance of Exiguobacterium and Pseudomonas. Plastics also carry AMR bacteria including ?-lactam resistance. Thus, Southwest Indian Ocean islands are facing serious plastic pollution. This pollution requires vigilant monitoring as it harbors a plastisphere including AMR, that threatens pristine ecosystems and potentially human health through the marine food chain. specialized REUNION OCEAN INDIEN 038POLOCE 198 115911 [12 ] 2024 0025-326X https://www.documentation.ird.fr/hor/fdi:010089048 10.1016/j.marpolbul.2023.115911 0025-326X [F B010089048] https://www.documentation.ird.fr/hor/fdi:010089048 https://www.documentation.ird.fr/intranet/publi/2023-12/010089048.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-12-18 2026-06-12 fdi:010089048 fre