Fig 3.

The sources of community microorganisms in different environment types (EMP ontology, EMPO3). (a) Results of the source tracking for microbiota in different environment types (EMPO3). “Sink” represents the environment type analyzed, and “source” shows the proportion of microbial sources from other environments of the sink. (b) Hierarchical clustering tree based on the Bray–Curtis metric using the ratio of assembly subprocesses (heterogeneous selection, homogeneous selection, dispersal limitation, homogenizing dispersal, and drift).