Invasive species ‘highways' created by India's river interlinks

Gist Recent research indicates that India's ambitious National River-Linking Project NRLP risks creating "ecological highways" that facilitate the spread of Invasive Alien Species IAS across previously isolated river basins. By artificially connecting these basins, the project could introduce alien competitors and aquatic pathogens, severely threatening endemic and native biota that lack natural evolutionary defenses. For a civil services aspirant, this highlights a critical conflict between large-scale infrastructure development aimed at regional water security and the preservation of India's unique riverine biodiversity. Background The National River-Linking Project NRLP is an infrastructure initiative aimed at connecting 37 major river basins across India to transfer water from artificially designated 'surplus' basins to 'deficit' basins. The project intends to redistribute approximately 174 billion cubic metres of water and generate 34,000 MW of hydroelectric power to address regional water scarcity and agricultural needs. Historically, India's river basins have remained geographically and ecologically isolated, allowing unique, highly adapted endemic species to evolve in specific environmental niches without facing outside competition. Previously, environmental critiques of the NRLP primarily focused on physical and hydrological impacts—such as altered downstream…