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Distribution of Fishes in the Red River of the North Basin on Multivariate Environmental Gradients

Canonical Correspondence Analysis

Table 8. Correlation coefficients of environmental variables with canonical correspondence axes 1-4 (CC1-CC4). Cumulative percentage variance of species-environment relationship is in parentheses.

Environmental
variable
CC1
(25.3)
CC2
(49.1)
CC3
(63.8)
CC4
(71.5)
conductivity
-0.4667
0.7075
0.2156
-0.2239
hardness
-0.3278
0.7114
0.2449
0.0367
alkalinity
0.0172
0.5102
0.1271
-0.0144
sulfate
-0.4068
0.6516
0.4622
-0.0139
chloride
-0.1493
0.2542
0.0590
-0.1575
residue
-0.4837
0.6901
0.3015
-0.0891
nitrogen
-0.1752
0.4307
-0.4294
-0.0327
phosphorus
-0.1035
0.5067
-0.1280
0.0524
average discharge
-0.4387
-0.6718
-0.4467
0.3002
May high discharge
-0.4161
-0.5074
-0.5141
0.3293
May low discharge
-0.2983
-0.7713
-0.4812
0.0563
flow variability (CV)
-0.0447
0.9231
-0.0091
-0.1607

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