Collection sites (black circles, numbered) and community composition (size of the pie-chart is proportional to species richness) of aquatic gastropods of the study sites. Flow direction (black arrows) and hydro-chemistry monitoring stations (red stars) indicated. Inset: Pune district, river basins and percent urban built-up. (For color and respective values in the inset figure, please refer to Supplementary Fig. S1 for details).