TABLE 3.

Correlations and significance for rank similarity matrices obtained for the community structures of the total and active nirK denitrifiers compared to environmental or microbial factors

Community and factor or activity	R coefficient (cP)a for samples from:
	All sites	H	F	Hp
Total nirK denitrifiers
Environmental factor
Nitrate concn	0.15 (0.003)	0.18 (0.03)	0.15 (0.09)	0.04 (0.8)
EOC	0.11 (0.14)	0.2 (0.03)	0.09 (0.41)	0.03 (0.14)
WFPS	ND	0.19 (0.03)	0.07 (0.46)	ND
Microbial activity
Denitrification	ND	0.21 (0.01)	0.12 (0.26)	ND
DEA	0.02 (0.8)	0.07 (0.56)	0.04 (0.7)	0.04 (0.7)
Active nirK denitrifiers
Environmental factor
Nitrate concn	0.01 (0.83)	0.07 (0.36)	0.35 (0.002)	0.02 (0.23)
EOC	0.08 (0.29)	0.03 (0.82)	0.01 (0.93)	0.02 (0.41)
WFPS	ND	0.15 (0.16)	0.12 (0.3)	ND
Microbial activity
Denitrification	ND	0.18 (0.03)	0.39 (0.005)	ND
DEA	0.01 (0.89)	0.05 (0.7)	0.02 (0.88)	0.04 (0.81)

^aND, not determined. P values of ≤0.05 are indicated in bold.