Figure 1. Phylogenetic affiliation, relative abundance and habitat distribution of OTUs that are >0.5% of total bacterial community.

The bubble size represents the relative abundance of each OTU, and bubble color indicates the types of habitats where their closest relatives in the greengenes database were found. OTUs marked red were exclusively found in higher termites, orange OTUs were restricted to termites, including both higher and lower termites, green OTUs were also found in the guts and feces of other animals (e.g. cow, goat and elephant). Blue OTUs were found in other anoxic environments, such as anaerobic digesters.