Figure 2

Hierarchical clustering of genera and metabolic pathways. The heatmap represents the presence (red) and absence (green) of all 706 pathways (columns) in all 1206 genera (rows). The dendrograms to the left and on the top of the heatmap represent the clustering results of the genera and the pathways, respectively. Higher taxonomic classifications of the genera are marked on the two colored strips: the Bacteria/Archaea domain classification on the left strip and the phylum classification on the right trip.