Fig. 8: PCoA and Venn results of injection and production wells.
From: DNA-sequencing method maps subsurface fluid flow paths for enhanced monitoring

a Principal coordinate analysis results. b Venn diagram of bacterial tracers abundance for injection Well 7N3 c 5–4, and d 5N5. The coordinate axis below the Venn diagram represents the total number of OTUs for each well fluids sample.