Fig. 3

Taxonomic profiling of rock endolithic microbial communities. Principle component analyses were carried out based on phylum-level (A) and family-level (B) taxonomic profiles, prior to (left) and after (right) decontamination. The color coding indicates the sample type. Phylum-level taxonomic profiles were visualized as heatmap (C). (1) and (2) indicate two groups of samples (see main text for details). White and black boxes indicate if the corresponding profile is based on decontaminated data. Ex. and Lib. BLANKS refer to extraction and library blanks, respectively