Table 5.

Physicochemical factors and higher taxa in the CCA analysis. The data with underline shows important variable for CCA.

	Axis 1	Axis 2	Axis 3	Axis 4
flow	0.044	−0.489	0.134	0.086
width	0.366	−0.226	−0.040	−0.165
depth	0.250	−0.345	0.168	−0.238
EC	−0.239	0.213	0.280	0.025
O2 (%)	−0.204	0.101	−0.052	0.069
P-PO4	−0.307	0.339	0.147	0.128
Oligochaeta	1.750	0.589	0.261	0.542
Hirudinea	−0.827	−1.961	1.112	1.564
Asellidae	0.029	−1.236	0.198	0.386
Chironomidae	−1.096	1.444	0.937	0.146
Gastropoda	0.654	−0.770	0.505	−2.157
Bivalvia	−0.709	−0.251	0.246	−1.748