Water quality, habitat, and fish assemblage relationships in middle-order agriculture and forest streams of the Mississippi Alluvial Plain

Ecological Processes

Table 5 Canonical correspondence analysis of fish species and environmental characteristics for agriculture and forest streams of the Mississippi Alluvial Plain

Axis summary statistics	CA1	CA2	CA3
Eigenvalue	0.762	0.718	0.567
% of variance explained	23.5	22.1	17.5
Cumulative % variance explained	23.5	45.6	63.1

Environmental variables:	r	r	r
Temperature	− 0.256	− 0.185	− 0.085
Dissolved oxygen	0.130	− 0.331	− 0.100
Specific conductance	− 0.234	− 0.549	0.036
Total suspended solids	− 0.146	0.046	0.279
Chloride	0.033	− 0.222	0.290
Alkalinity	− 0.186	− 0.515	− 0.318
Total nitrogen	− 0.179	0.347	− 0.014
Total phosphorus	− 0.617	0.155	0.085
Benthic chlorophyll-a	− 0.421	− 0.575	− 0.231
Water-column chlorophyll-a	− 0.250	− 0.235	0.219
Total habitat score	0.533	0.651	− 0.063
Salinity	− 0.274	− 0.515	− 0.010
pH	− 0.098	− 0.594	− 0.268
Turbidity	− 0.131	0.016	0.455
Total ammonia nitrogen	− 0.222	− 0.047	− 0.108
Nitrate	− 0.345	− 0.062	0.401
Phosphate	− 0.573	− 0.105	0.260
Hardness	− 0.104	0.096	− 0.014