Fig 4.
Relative abundance (%) of class-level taxa within the phyla Bacteroidetes, Proteobacteria, and Firmicutes. The proportion of each taxonomic group is described by the measure of its central angle. Taxa within the phylum Bacteroidetes: 
, Bacteroidia; 
, Flavobacteria; 
, Sphingobacteria. Taxa within the phylum Proteobacteria: 
, Alphaproteobacteria; 
, Betaproteobacteria; 
, Deltaproteobacteria; 
, Epsilonproteobacteria; 
, Gammaproteobacteria. Taxa within the phylum Firmicutes: 
, Bacilli; 
, Clostridia.