FIG 2.

Phylogenetic tree illustrating the evolutionary history of bacteria, constructed during sampling session two by means of the maximum composite likelihood function (evolutionary history) and neighbor-joining method in the MEGA 5 program. The numbers adjacent to the nodes represent the results (percentages) from 1,000 exploratory bootstrap trials. Bar, 0.05 changes per site. The tree was drawn to scale. Three distinct clades, Enterobacteriales, Aeromonadales, and Pseudomonadales, encompassing the families Enterobacteriaceae, Aeromonadaceae, Moraxellaceae, and Pseudomonadaceae, were identified.