Fragmentation of Central Indian Forest Corridors: Implications for Tiger Conservation and Genetic Diversity

Central India, often referred to as the 'tiger heartland,' is home to a significant portion of the world’s wild tiger population. However, a recent study has raised alarms regarding the increasing fragmentation of forest corridors that connect major Tiger Reserves like Kanha, Pench, and Bandhavgarh. These corridors are essential for the natural dispersal of sub-adult tigers seeking new territories and mates, ensuring genetic flow across the landscape.

The study identifies linear infrastructure—such as highways, railway lines, and irrigation canals—along with changing land-use patterns as the primary drivers of this fragmentation. When these natural pathways are severed, tiger populations become 'islands' of genetic isolation. Over time, inbreeding can lead to reduced fitness and increased vulnerability to diseases, potentially resulting in local extinctions. Furthermore, as tigers find their traditional routes blocked, they are more likely to wander into human-dominated landscapes, significantly escalating the frequency and intensity of human-wildlife conflict.

From a policy perspective, the findings underscore a critical gap in current developmental planning. While India has made strides in increasing tiger numbers, the long-term sustainability of these gains depends on 'landscape-level' conservation rather than focusing solely on isolated protected areas. The integration of 'Green Infrastructure'—such as eco-bridges, underpasses, and overpasses—into the design phase of road and rail projects is no longer optional but a necessity.

Moreover, the study calls for a more robust Environmental Impact Assessment (EIA) process that accounts for the cumulative impact of multiple projects on wildlife movement. Strengthening the legal status of these corridors, which often lack the same protection as National Parks, is essential for maintaining the ecological integrity of the Central Indian landscape.