Factors associated with blooms of cyanobacteria in a large shallow lake, China

Environmental Sciences Europe

Table 3 Results of forward selection with 999 Monte Carlo permutations of environmental variables for species composition

Variables	RDA1	RDA2	R ²	P value
WT	0.892	0.452	0.240	0.001***
pH	0.769	0.639	0.110	0.013*
SD	0.960	− 0.279	0.086	0.017*
DO	− 0.738	− 0.675	0.201	0.001***
Conductivity	− 0.999	0.053	0.063	0.080
COD_Mn	− 0.036	− 0.999	0.129	0.002**
BOD₅	0.662	− 0.750	0.100	0.016*
TN	− 0.967	− 0.256	0.023	0.36
NH₄⁺–N	0.973	− 0.232	0.025	0.35
TP	0.603	− 0.798	0.080	0.026*
COD_Cr	− 0.943	− 0.334	0.091	0.025*
F⁻	− 0.884	− 0.467	0.417	0.001***
As	0.982	− 0.190	0.128	0.005**
Cu	− 0.859	0.511	0.007	0.764
Pb	0.678	0.735	0.063	0.069
MC-LR	0.803	− 0.596	0.108	0.007**
NPR	− 0.976	0.219	0.025	0.347

Correlations with RDA1 and RDA2, R² and p values are shown. Significance was expressed as *p < 0.05, **p < 0.01, and ***p < 0.001