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| Format: | Artículo científico |
| Sprache: | en |
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Ecotoxicology and environmental safety
2026
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| Online-Zugang: | https://pubmed.ncbi.nlm.nih.gov/41886872/ |
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Inhaltsangabe:
- Tissue differences and changes in the resident bacteriome composition of the Pacific oyster Magallana gigas in relation to trace metal contamination. Roger, Maëlann Le Monier, Pauline Bruzac, Sandrine Noël, Cyril Akcha, Farida Bertucci, Anthony Animals Water Pollutants, Chemical Microbiota Ostreidae Environmental Monitoring RNA, Ribosomal, 16S Metals Bacteria Gills France Symbiotic microbial communities associated with marine organisms may contribute to the biology and the local adaptation of their host, playing a crucial role in the health of the holobiont. The role of the microbiome of bivalves remains poorly understood despite their high economic value and use as sentinel species to biomonitor water quality. In this study, we used 16S (V3-V4) rRNA amplicon sequencing to investigate the resident bacterial communities associated with the digestive gland, the mantle and the gills of Pacific oysters. We analysed oysters collected from six sites along the French coastline to investigate whether chemical stressors can shape the oyster bacteriome in natural conditions. The resident bacteriome of oysters was dominated by the phyla Proteobacteria, Spirochaetota, Firmicutes and Actinobacteriota with some differences between organs. Chemical analysis revealed differences in trace metal concentration among sites and organs. Statistical analysis showed strong positive or negative correlations between the concentration in some metals and bacterial diversity (ASVs abundance). We identified 316 ASVs associated with As, Cr, Cu, Mn and Zn concentrations in digestive glands, 99 ASVs associated with Ni concentrations in gills, and 116 ASVs associated with Cu concentrations in the mantle. Metal contamination mostly affected members of the core microbiota of oysters such as genera Colwellia and Psychrobacter, evidencing the crucial role of marine pollutants, particularly trace metals, as key parameters of the interactions between hosts and their bacterial partners.