 This study examined the impacts of wastewater discharge on macrophonal communities in Osobe, Texas. It found that macrophonal communities differed depending on their proximity to the wastewater discharge point. In particular, ostrichod populations were more abundant near the discharge point. Additionally, the study showed that silicate levels in the water column were strongly correlated with macrophonal community composition. Finally, it demonstrated that even in hydrologically altered estuaries, point source discharges can still have significant ecological consequences. This article was authored by Kevin de Santiago, Ternce Parma, Michael S. Wetz, and others.