Formation of lactic acid bacteria-yeasts communities on the olive surface during Spanish-style Manzanilla fermentations

► Lactic acid bacteria and yeasts were analysed in depth on fermented olive epidermis. ► A strong aggregation and adhesion between bacteria and yeasts on olive epidermis was noticed. ► Microorganisms were embedded by an apparent exopolysaccharide matrix forming a complex biofilm. ► In the majority of cases, the inoculated Lactobacillus pentosus strains were imposed over the native LAB population.