Fig. 2

An outline of the metagenomes used in this study. a The geographical, age, and gender distribution of 3,534 metagenomes collected from healthy people. b Boxplots illustrating the distribution of MASH distances between samples within each BioProject. The BioProject accession is used as a label, and the color gradient indicates the size, i.e., the number of samples in each. c Average linkage hierarchical clustering of 72 BioProjects containing healthy samples. BioProjects containing samples from different continents are presented separately. Labels indicate the continent of origin: EU—Europe, AS—Asia, NA—North America, AS—Australia, AF—Africa, SA—South America, and P stands for Primates. Except for the single primate BioProject (BioSample), each BioProject is listed in colored font according to the continent from which it originates. No severe clustering of samples based on origin is detected