Water Properties Influencing the Abundance and Diversity of Denitrifiers on Eichhornia crassipes Roots: A Comparative Study from Different Effluents around Dianchi Lake, China

Table 4

Redundancy analysis results of nirK, nirS, and nosZ DGGE profiles.

Axis	Eigenvalue	Denitrifier-environment correlation	Cumulative% variation of denitrifier	Cumulative% variation of denitrifier-environment	Sum of all canonical eigenvalues
nirK RDA
Axis 1	0.269	0.987	26.9	31.0	0.867
Axis 2	0.218	0.954	48.7	56.2
Axis 3	0.141	0.944	62.8	72.5
Axis 4	0.075	0.990	70.3	81.1
nirS RDA
Axis 1	0.295	0.965	29.5	42.6	0.693
Axis 2	0.114	0.895	41.0	59.1
Axis 3	0.099	0.780	50.8	73.3
Axis 4	0.072	0.861	58.0	83.8
nosZ RDA
Axis 1	0.378	0.996	37.8	48.1	0.786
Axis 2	0.136	0.973	51.5	65.5
Axis 3	0.097	0.682	61.2	77.9
Axis 4	0.071	0.971	68.4	87.0