Fig. 2.

Connection between different built environment types. UPGMA tree (Unweighted Pair Group Method with Arithmetic Mean tree) of sampled built environments based on different microbial communities resolved to species level. Calculations were executed with MEGAN according to the results of the BLASTx searches against NCBInr. Data of single reads were filtered (unassigned reads were removed) and normalized (randomly and repeatedly subsampled to the smallest sample size). Color code for column environment: blue (cleanroom facility); red (intensive care unit); dark green (public buildings); light green (public houses); yellow (private houses)