FIG. 5.

Correspondence analysis of the conductivity values, the lithologies, and the fractions of the different phylotypes observed in association with the 16S rRNA gene libraries from the different depths at the contaminated (VRP5) and uncontaminated (VRP9) sites. Numbers along the axes represent the scores as calculated by correspondence analysis based on the percentages of gravel, sand, silt, and clay present at the elevations corresponding to each library, the conductivity data and the fraction of hydrocarbon degraders as shown in Table 1, and the percentage of each bacterial group present in each library as shown in Table 2. CA1, correspondence analysis axis 1; CA2, correspondence analysis axis 2.