FIG 4.

Geographical representation of the area under study: the San Roque Dam, located in the province of Córdoba in Argentina. The sampling points are indicated. The brown circles mark the samplings carried out on the body of the reservoir: central (C), dam (D), and the San Antonio River (SA) and Cosquin River (CQ) (mouths of the tributaries). The yellow circles show the sampling points on the recreational beaches: Perelli Beach (PP), Club de Pescadores Beach (CP), and Bahía del Gitano Beach (BG). Map templates can be found at http://d-maps.com/carte.php?num_car=4732&lang=en, http://d-maps.com/carte.php?num_car=140164&lang=en, and https://www.google.com.ar/maps/place/Dique+San+Roque.