Fig. 6. Subsurface core microbiomes.

The heatmaps show potential archaeal order level core microbiomes in the marine (A) and terrestrial subsurface (B), as well as bacterial class level core microbiomes in the marine (C) and terrestrial subsurface (D). The 20 most relevant lineages, regarding their prevalence and RSAs, are shown as rows, and each column color represents the lineages prevalence at a certain RSA threshold. Uncultured/unclassified lineages are denoted by “uncl,” and the closest known phylogenetic level or the closest phylogenetic level with an isolated representative is shown. For example, Bathyarchaeia uncl are all uncultured/unclassified/order-level clades in the class Bathyarchaeia. Fields that are zero have a white outline.