Animal Microbiome · 12 authors, 5 centres
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An in situ transplantation experiment followed by metagenomic analysis revealed shifts in gut bacterial communities of deep-sea cold seep mussels (Gigantidas haimaensis) when deprived of their natural methane-rich environment. Gammaproteobacteria were enriched and Bacteroidetes were slightly depleted, with functional changes linked to carbon source acquisition, ammonia and sulphide utilisation, and self-protection mechanisms.
This study used metagenomic sequencing to characterise the gut microbiome of the deep-sea chemosymbiotic mussel Gigantidas haimaensis and to investigate how the microbiome changes following in situ transplantation to an environment with inadequate methane supply. Meta-pathway analysis indicated nutritional and metabolic roles of the gut microbiome. Comparative analyses between original and transplanted mussels revealed enrichment of Gammaproteobacteria and slight depletion of Bacteroidetes. Functional shifts were attributed to acquisition of carbon sources and adjustment of ammonia and sulphide utilisation, alongside self-protection responses. The authors note that functional gene analysis was limited to class-level interactions due to technical constraints.
