Fig. 3

Changes in bacterial communities over time. Bray-Curtis similarities in Bacterial class composition between the beginning (day 1) and end (day 40) of the experiment, for live and dead incubations, and rhodolith thalli vesus tank seawater samples. Bacterial communities associated with live rhodoliths were similar over the course of the experiment, whereas significant changes in community structure were observed with the dead rhodoliths biofilms and both seawater column treatments