Fig. 2: Relative read abundance of 16S rRNA gene amplicon sequences.

The dendrogram in the upper part of the graph depicts the result of a complete linkage hierarchical clustering based on a Bray–Curtis dissimilarity matrix of the community composition at (A) McV and (B) BrV. Distribution of turbidity (∆NTU) is given below the hierarchical clustering indicating the intensity of the plume. The taxonomic assignment is based on the SilvaNGS pipeline [34] using SILVA SSU132 taxonomy. SUP05 subgroups were distinguished based on phylogenetic analysis using ARB. Taxonomic groups with <1% read abundance were combined for phylum level read abundance. SUP05 sequences are related to CTA Candidatus Thioglobus autotrophicus, CTT Candidatus Thioglobus thermophilus, CPS Candidatus Pseudothioglobus singularis. Metagenome samples are indicated with a black line underneath the stacked barchart and metatranscriptomes are indicated with a pink line.