Slaying the 'choker' with sword of science

ALL may seem hunky-dory and celestially beautiful at Vellayani, with its misty mornings and eco-tourism initiatives evoking considerable charm. But this picture-perfect setting exists only along its banks. Wade into the waters, and the choking of the lake becomes evident in more ways than one.

- APARNA NAIR

With over 50 per cent of the lake infested with invasive species, both foreign and native, the ecological impact has led to changes in groundwater quality and fish populations, as well as a decline in the visitation of migratory birds.

One of the main villains among these weeds is the water hyacinth, which has been making headlines for its invasion not just of Vellayani but most of Kerala's water sources. Scientists like Ajith Haridas, former head of CSIR-NIIST, believe this is a direct reflection of the lack of proper sewerage treatment in Kerala.