FIGURE 3.

Algal composition along the thalli and phylogenetic tree of the major algal OTUs. (A) Relative abundance of 10 major algal OTUs (>0.5% relative abundance). Positions of thalli in the colony and labels of subsection were illustrated in Figure 1B. (B) Bayesian tree of 10 major algal OTUs with closely related reference sequences. Thick branches represent those that were conserved in Bayesian, ML, and MP analyses. Posterior probabilities and bootstrap values (>0.9 and >70%) were shown on corresponding branches (Bayesian/ML/MP). The tree was rooted with Scherffelia dubia (HE610128, Chlorodendrophyceae). Detailed information for relative abundance of each OTU was included in Supplementary Table S2.