Study sites and characteristics.

Land cover (in percentage) is presented for the watershed upstream of the rivermouth (RM).
Ag  =  % of watershed with agricultural land cover; WDep  =  % of watershed covered by low-flow aquatic habitats (lakes +.
wetlands); RMDep  =  % of watershed covered by low-flow aquatic habitats below the R site; CF  =  caddisflies; DM  =  dreissenid mussels.
CF consumers were collected at all R sites. DM were collected at Cheboygan and Genesee R sites. Watershed land cover is not reported for sites where filter-feeding consumers could not be found.