Alpha diversity box plots for different ecosystems.

<p>Based on our dataset, we observe that soil, marine and plant-associated environments in general host more diverse communities. Thanks to the applied sub-categorization, we can further break down ecosystems to inspect diversity in different soil types (shown in supplementary <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1004468#pcbi.1004468.s001" target="_blank">S1 Fig</a>). We calculate Phylogenetic Distance Alpha diversity from samples rarefied to 1140 sequences.