Baetidae (Ephemeroptera: Insecta) as biological indicators of environmental degradation in Tamiraparani and Vaigai river basins of Southern Western Ghats, India

Biomonitoring of the Ephemeroptera (Family: Baetidae) was undertaken at species level in the Tamiraparani (Tirunelveli) and Vaigai (Theni) river basins of southern India. A total of 1,359 baetids were collected from three times from ten sampling sites, representing an environmental gradient.