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

Species Associations of Stream Fishes

Table 6. Scores of 27 streams on principal components axes 1-5 (PC1-PC5) and percent of total variance in species richness explained by each PC axis.

Stream	PC1	PC2	PC3	PC4	PC5
Red River	0.285	0.463	0.081	0.148	-0.163
Pembina River	-0.035	0.180	0.183	0.153	0.146
Tongue River	-0.369	-0.293	0.129	0.026	0.120
Park River	-0.111	0.106	0.157	-0.085	0.218
Forest River	-0.094	0.290	0.112	-0.097	0.301
Turtle River	-0.181	0.159	0.126	-0.250	0.093
Goose River	0.014	0.087	0.212	-0.071	-0.146
Elm River	-0.482	0.036	-0.063	-0.138	-0.047
Rush River	-0.308	0.225	0.059	-0.124	0.034
Maple River	-0.169	0.320	-0.033	0.157	0.223
Sheyenne River	0.498	0.313	-0.039	0.151	-0.008
Wild Rice River, ND	-0.230	0.221	-0.182	-0.096	-0.161
Bois de Sioux River	-0.037	0.297	-0.323	0.064	-0.341
Mustinka River	-0.448	-0.045	-0.374	-0.006	-0.053
Rabbit River	-0.455	0.033	-0.307	0.009	-0.099
Otter Tail River	0.732	0.034	-0.327	0.248	0.220
Pelican River	0.334	-0.348	-0.438	-0.276	0.246
Buffalo River	0.547	-0.177	0.035	-0.184	-0.213
Wild Rice River, MN	0.455	0.000	0.144	-0.248	-0.053
Sandhill River	-0.103	-0.004	0.341	-0.170	-0.098
Red Lake River	0.584	-0.140	0.156	0.196	0.066
Clearwater River	0.477	-0.369	-0.045	-0.212	-0.020
Snake River	-0.403	-0.336	-0.005	0.227	0.051
Middle River	-0.334	-0.431	0.101	0.207	-0.049
Tamarac River	-0.339	-0.320	0.062	0.143	-0.031
Two River	-0.116	-0.043	0.074	0.063	0.006
Roseau River	0.286	-0.258	0.167	0.166	-0.243
% of total variance (cumulative in parentheses)	26.9 (26.9)	12.3 (39.2)	7.9 (47.1)	5.4 (52.5)	5.1 (57.6)

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