Table 3.

Monte Carlo permutation test of environmental attributes with nifH high-throughput sequencing data.

	G. astreata	P. decussata	P. lutea
Ammonium	0.009	0.045	0.044
Nitrate	0.005	0.023	0.048
Nitrite	0.061	0.083	0.092
Phosphate	0.013	0.022	0.661
Chlorophyll a	0.296	0.223	0.026
pH	0.076	0.077	0.951
COD	0.052	0.072	0.099
DO	0.083	0.07	0.224
Salinity	0.045	0.020	0.396
Temperature	0.018	0.047	0.995

Significant differences (P < 0.05) are indicated in italics.