TABLE 3.

Correlation analysis between geochemical parameters with EaCoMT gene abundance and diversity

Parameter	Correlation with EaCoMT gene abundance (no. of genes/liter of GW)						Correlation with etnE diversity
	n	Linear regression			Spearman		n	Index	Linear regression			Spearman
		Slope	R2	P value	Rho	P value			Slope	R2	P value	Rho	P value
Vinyl chloride concn (μg/liter)	15	9.36 × 101	0.851	<0.001	0.699	0.005	14	H′	1.69 × 10−6	0.019	0.641	0.107	0.715
								1/D	9.19 × 10−6	0.086	0.309	0.189	0.514
Ethene concn (μg/liter)	11	1.12 × 104	0.987	<0.001	0.859	0.001	9	H′	6.60 × 10−5	0.006	0.850	−0.319	0.386
								1/D	9.00 × 10−4	0.130	0.341	−0.151	0.682
Bulk VC attenuation rate (yr−1)	11	−2.57 × 105	0.004	0.853	0.636	0.039	10	H′	9.59 × 10−2	0.058	0.503	−0.110	0.636
								1/D	−2.32 × 10−1	0.040	0.580	−0.200	0.465
Point VC decay rate (yr−1)	6	3.33 × 105	0.134	0.475	0.203	0.700	5	H′	5.06 × 10−1	0.152	0.516	0.359	0.567
								1/D	8.17 × 10−2	0.059	0.693	0.359	0.567
DO concn (mg/liter)	14	−1.46 × 106	0.158	0.160	−0.257	0.374	13	H′	7.20 × 10−2	0.027	0.590	0.170	0.579
								1/D	1.24 × 10−1	0.012	0.721	0.104	0.737
ORP (mV)	9	−8.55 × 102	0.087	0.441	−0.350	0.359	8	H′	−2.10 × 10−3	0.167	0.315	−0.262	0.536
								1/D	−5.90 × 10−3	0.250	0.207	−0.286	0.501
pH	9	−4.98 × 104	0.024	0.693	−0.250	0.521	8	H′	8.73 × 10−2	0.044	0.619	0.238	0.582
								1/D	3.94 × 10−1	0.163	0.321	0.452	0.268
Temp (°C)	9	−2.11 × 104	0.367	0.084	−0.683	0.050	8	H′	3.25 × 10−3	0.006	0.852	0.167	0.703
								1/D	4.04 × 10−2	0.177	0.300	0.405	0.327

^a Bold values indicate relationships that are significant (two-tailed P value < 0.05); n represents the number of wells available for the analysis. GW, groundwater.