biostudies-literatureUnknown87(1)Stenger PLOMNCGThe marine microbiome arouses an increasing interest, aimed at better understanding coral reef biodiversity, coral resilience, and identifying bioindicators of ecosystem health. The present study is a microbiome mining of three environmentally contrasted sites along the Hermitage fringing reef of La Réunion Island (Western Indian Ocean). This mining aims to identify bioindicators of reef health to assist managers in preserving the fringing reefs of La Réunion. The watersheds of the fringing reefs are small, steeply sloped, and are impacted by human activities with significant land use changes and hydrological modifications along the coast and up to mid-altitudes. Sediment, seawater, and coral rubble were sampled in austral summer and winter at each site. For each compartment, bacterial, fuMicrobial ecology179https://www.ebi.ac.uk/biostudies/studies/S-EPMC11772467biostudies-literatureA Multimarker Approach to Identify Microbial Bioindicators for Coral Reef Health Monitoring-Case Study in La Reunion Island.PMC11772467Jourand PCuet PTribollet APennober GGuilhaumon FStenger PLfalseA Multimarker Approach to Identify Microbial Bioindicators for Coral Reef Health Monitoring-Case Study in La Reunion Island.The marine microbiome arouses an increasing interest, aimed at better understanding coral reef biodiversity, coral resilience, and identifying bioindicators of ecosystem health. The present study is a microbiome mining of three environmentally contrasted sites along the Hermitage fringing reef of La Réunion Island (Western Indian Ocean). This mining aims to identify bioindicators of reef health to assist managers in preserving the fringing reefs of La Réunion. The watersheds of the fringing reefs are small, steeply sloped, and are impacted by human activities with significant land use changes and hydrological modifications along the coast and up to mid-altitudes. Sediment, seawater, and coral rubble were sampled in austral summer and winter at each site. For each compartment, bacterial, fu2025-01-01T00:00:00Z2025 Jan2026-06-01T23:18:07.392Z2025-04-04T20:57:12.943ZS-EPMC117724673987090410.1007/s00248-025-02495-3