Fig. 3.

Comparison of the relative abundance of A) class 1; B) class 2; and C) class 3 integron genes per bacterial cell across the network. Krustall-Wallis rank sum test and the Wilcoxon-Mann-Whitney test was used to determine if each integron gene was enriched or reduced at each sample site compared with the population mean (dashed line). Significance: *0.05 and 'ns’ not significant. Sample sites: RU, upstream water column; SRU, upstream sediments; HP_A and HP_B, hospital wastewater; CM, community wastewater; INF, WWTP influent; RAS, recycled activated sludge; EFF, WWTP effluent; RD, downstream river water column; and SRD, downstream sediment.