Fig 2.

Assembly mechanisms of global microbial communities. (a) The proportions of deterministic and stochastic processes of microbial communities in different types of environments. Each point represents the result of a single random sampling. For the box plots, the middle line indicates the median, the box represents the 25th–75th percentiles. Environment types were classified by EMPO (EMP ontology), blue represents the global, olive represents host-associated and magenta represents free-living. The number of samples in the corresponding environment is shown in parentheses. (b) Assembly mechanisms within the deterministic and stochastic processes for microbial communities in different environment types.