Fish Assemblages on a GIS Map of the Wabash River Length

We used side scan sonar to collect GIS data for a bathymetric map of the entire length of the Wabash River. Bathymetry data were supplemented with water velocity, substrate size, and woody debris in a GIS. Individual fish species were assigned separate layers to allow visualization of habitat patterns with fish occurrences. We used several ordination approaches to test for fish assemblage structure that varies with habitat variables.