Table 1.

ANOSIM R values between river reaches or seasons for the six studied bacterial classes.

	ANOSIM R values
	Upstream vs. Downstream	Sampling campaign
Actinobacteria	0.93**	0.22*
Betaproteobacteria	0.58**	0.29*
Alphaproteobacteria	0.86**	0.15*
Gammaproteobacteria	0.11*	0.09*
Flavobacteria	0.21**	0.15*
Sphingobacteria	0.49**	ns

All R for Bray-Curtis distance matrices values were calculated using 9999 permutations. Significance codes for R values: ^**p < 0.0001, ^*p < 0.001, ns = not significant.