Horizon 1 1 5 OS CH : Chapitres d'ouvrages scientifiques Our shared ocean : science in the Global South for a sustainable world Grands Enjeux 98-99 OCEAN INDIEN MAYOTTE 2025 Marseille IRD fdi:010094136 ENG https://www.documentation.ird.fr/hor/fdi:010094136 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2025-07/010094136.pdf Horizon (IRD) When it comes to environmental observation, data is often lacking. To assess the health of coastal ecosystems, we need better monitoring of variations in shallow ocean habitats, such as coral reefs and seagrass beds 126TELAPP05 ; 128CARTO ; 082ECOSYS