Fig. 2From: Microbial composition of spiny ants (Hymenoptera: Formicidae: Polyrhachis) across their geographic rangeRarefaction curves were used to estimate richness in the observed OTUs. The vertical axis shows the bacterial OTUs observed and the number of sequences per sample is shown on the horizontal axis. Note that although sequencing covers thousands of Illumina reads, some samples have not reached the plateauBack to article page