Table 2.

Results of the forward selection of environmental variables (Monte Carlo permutation test in RDA; p < 0.05 and p < 0.001 are statistically significant and provided in italics) in all samples, with division into two separate groups of samples (ecosystems): flowing and stagnant waters

Parameters	All sites			Flowing waters			Stagnant waters
	λ	F	P	λ	F	P	λ	F	P
Temperature (°C)	0.08	14.64	0.001	0.06	7.49	0.004	0.01	0.69	0.422
pH (−)	0.06	12.06	0.001	0.00	0.56	0.485	0.13	10.78	0.002
SO4 (mg L−1)	0.03	7.97	0.004	0.03	4.83	0.026	0.02	1.80	0.150
TDS (mg L−1)	0.03	6.29	0.009	0.01	2.06	0.132	0.07	5.73	0.011
Conductivity (μS cm−1)	0.03	6.08	0.043	0.06	6.70	0.004	0.02	1.88	0.149
Cl (mg L−1)	0.01	2.06	0.147	0.02	2.60	0.086	0.00	0.04	0.926
DO (mg L−1)	0.01	1.86	0.178	0.11	13.23	0.001	0.02	1.77	0.182
N-NH4 (mg L−1)	0.00	0.89	0.368	0.01	0.56	0.526	0.00	0.12	0.819
Fetotal (mg L−1)	0.00	0.59	0.454	0.01	0.93	0.350	0.01	1.36	0.238
P-PO4 (mg L−1)	0.01	0.32	0.631	0.02	2.20	0.135	0.01	0.51	0.506
N-NO3 (mg L−1)	0.00	0.23	0.729	0.00	0.45	0.555	0.00	0.41	0.537
NaCl (mg L−1)	0.00	0.03	0.943	0.01	1.91	0.155	0.00	0.03	0.949