TABLE 2.

Pearson correlation coefficients between the 15 indicator OTUs and pollution variables^a

OTU	Taxa	DIN		TP		SO4
		ρ	P	ρ	P	ρ	P
36402	Nitrospirae, Nitrospira, Thermodesulfovibrionaceae, GOUTA19			−0.683	<0.001	−0.749	<0.001
11599	Chloroflexi, Anaerolineae, SB-34			−0.645	<0.001	−0.750	<0.001
20070	Acidobacteria, OS-K	−0.507	0.009			0.397	0.049
28256	Gemmatimonadetes, Gemm-2	0.429	0.032	−0.457	0.022	−0.665	<0.001
20720	Gammaproteobacteria, Xanthomonadales	0.476	0.016	−0.491	0.013	−0.659	<0.001
3200	Gammaproteobacteria, Xanthomonadales			−0.518	0.008	−0.616	0.001
37508	Gammaproteobacteria, Xanthomonadales	−0.342	0.047	0.492	0.012	0.700	<0.001
2574	Gammaproteobacteria, Chromatiales			−0.485	0.014	−0.561	0.004
41689	Gammaproteobacteria, Chromatiales					0.474	0.017
2106	Gammaproteobacteria			0.477	0.016	0.620	0.001
19635	Deltaproteobacteria, Syntrophobacterales, Desulfococcus	−0.562	0.003	0.473	0.017	0.664	<0.001
35580	Deltaproteobacteria, Syntrophobacterales	−0.645	<0.001	0.504	0.010	0.674	<0.001
28637	Deltaproteobacteria, Desulfuromonadales, Desulfuromonadaceae	−0.422	0.036	0.545	0.005	0.806	<0.001
41623	Deltaproteobacteria, Desulfobacterales, Desulfobulbaceae	−0.500	0.011	0.611	0.001	0.874	<0.001
24733	Deltaproteobacteria, Desulfobacterales, Desulfobulbaceae	−0.481	0.015	0.566	0.003	0.744	<0.001

^aOnly the significant coefficients (P < 0.05) are listed.