Bacterial communities associated to Ulva spp. (Ulvales, Chlorophyta) are different from those of the surrounding water both
in terms of biodiversity and function and play an essential role for the function of the algae, implying that the macroalgae andall their associated microbiota form a singular entity or holobiont (Egan et al 2012). The specific composition of those bacterial communities may be formed by different members of equivalent functional guilds and a stable core set of functional genes in the bacterial communities associated with different Ulva species has been demonstrated (Roth-Schulze et al 2018).This work is funded by Spanish Ministerio de Economia y Competitividad (AGL2013-41868-R)Postprint (published version
