Fig. 3: Relative abundance of dfrB and dfrA genes aggregated at family level in samples from the Lockwitzbach River Basin, Germany (study label “q” in Table 1).

Panel A refers to the dfrB gene and panel B to dfrA. The p values refer to a shift in location between water and sediment-borne samples (Wilcoxon rank sum test). Note the custom y-axis resulting from power transformation with an exponent of 0.2.