Study of the microbiota of Ulva spp. and its surrounding environment through 16S rRNA gene amplicon sequencing, 2021/2022

Ulva sp. is a green macroalga mainly known for its proliferative abilities during green tide episodes, but it is also a macroalga of economic importance used in various sectors (aquaculture, cosmetic). The aim of this study was to explore the temporal dynamic of the epibacterial communities from Ulva spp. and their surface metabolom over a year and a half in south Brittany. The LC-MS based surface metabolomics and 16S rDNA metabarcoding data sets were integrated in a multivariate analysis in order to highlight the positive and negative correlations between microbiota composition, surface metabolites and other potential drivers (biochemical and environmental).