Fig. 4
Phylogenetic diversity. A, D All bacteria. B, E Putative aerobic bacteria. C, F: Putative anaerobic bacteria. A–C The standardized effect size of Faith´s phylogenetic diversity (PDSES). D–F The weighted mean nearest taxon distance (MNTDSES). The dashed horizontal line represents − 2 SES; for the samples with SES below − 2, SES is significantly lower than expected by random chance