Figure 2: Bacterial abundances in each composite soil sample determined by qPCR in the six lysimeters.Symbol colors designate different treatment groups: PAH+ HK44+ (L1, L2, L4) are black; PAH- HK44+ (L3, L5) are white; PAH+ HK44- (L6) are grey. The bacterial abundance of each sample (each data point) is shown as the mean ± standard deviation of replicate qPCRs (n=6) on composite soil samples.