Figure 3

Taxonomic composition for the nine most abundant families determined using identified 16S sequences, across all 21 samples ordered by increasing age; increasing frailty in each group is ordered from left to right. For visual clarity, only the nine most abundant families are shown in the plot. Taxonomic ranks are indicated as follows: ‘k’, kingdom (or domain); ‘p’, phylum; ‘c’, class; ‘o’, order; ‘f’, family. The unspecified ‘f__’ represents those OTUs that do not have a specific family name but are known to be within the order Clostridiales.