Relative abundance of predominant phyla across 15 microbiomes from 5 subjects. Bacterial phyla are indicated by the colour mode. Rare "cyanobacteria" identified in samples 1-5, 1-29 and 5-1 are not depicted. The rightmost column designated as "All" corresponds to the average of phyla frequency in individual samples. Sample numbers include subject ID, hyphen and the follow up time (days) after the first sampling time point (day 1).