Table 1. The relative proportions (%) of the top four species representing >95% of all operationally defined units (OTU).

Family	Genus/species	Abundance (%)
Enterobacteriaceae	Citrobacter freundii	35 ± 4
Enterobacteriaceae	Enterobacter cloacae	17 ± 2
Pseudomonadaceae	Pseudomonas putida	38 ± 6
Comamonaceae	Comamonas testosteroni	6 ± 2
Total		96 ± 1