Fig. 1

Microbial community composition of the four examined Karlovy Vary thermal springs. Pie charts a show the fractions of ASVs belonging to Bacteria or Archaea (counted from combined spring and autumn sequencing data). Bar plots b show the community composition at the taxonomic level of class for each thermal spring at the two sampled time points (autumn and spring). Classes referred to as other represent all classes with a relative abundance < 0.05% per sample; NA refers to unclassified ASVs