Table 2.

Interstation variability of measured sediment and water column ARG abundances during dry-season and wet-season sampling.

	Water column			Sediment
	Dry-season	Wet-season	F	Dry-season	Wet-season	F
tet(M)	0.42	0.28	1.5a	0.23	0.60	0.38
tet(O)	0.64	0.40	1.60	0.37	0.48	0.77
tet(Q)	0.81	0.96	0.84	0.32	1.7	0.20
tet(W)	1.1	0.15	7.2	0.56	0.66	0.84
erm(B)	0.57	0.20	2.9	0.17	1.2	0.14
erm(E)	0.07	0.10	0.72	0.21	0.42	0.49
blaSHV	0.23	0.16	1.5	0.10	0.60	0.16
blaOXA	0.27	0.25	1.1	0.39	0.14	2.9
blaTEM	0.64	0.08	7.7	0.33	0.44	0.75
Mean (95% CI)	0.53b (0.21)	0.29 (0.18)	2.78 (1.78)	0.30 (0.09)	0.69 (0.31)	0.74 (0.56)

Values present mean-square-deviations (MSD) of measured levels among stations along the river.

^aF represents the ratio of dry-season versus wet-season MSD data.

^bMean MSD or F value among all ARG measured per season and compartment; 95% CI = 95% confidence interval.