Table 4. Unifrac analysis showing statistical significance (P- values) of differences among the bacterial communities of sites of the biological treatment calculated based on partial sequences of 16S rRNA gene.

	Aerobic	Anaerobic	CW1	CW2	CW3
Aerobic	-	<0.001	<0.001	<0.001	<0.001
Anaerobic		-	<0.001	<0.001	<0.001
CW1			-	0.003	0.001
CW2				-	0.041
CW3					-

P-values of Weighted UniFrac test are calculated based on 1000 permutations (pairwise differences).

Bold values indicate populations not significantly different from each other (P>0.01).