Abstract

Land-use transformations altering the ecosystem function have impacted the sustenance of natural resources. Implementation of unplanned developmental activities in the ecologically fragile regions has contributed to frequent landslides, conversion of perennial rivers to intermittent or seasonal rivers, reduced water retention capability, etc. Addressing these challenges entails understanding the drivers of land-use change and also their role in altering land-uses. Large-scale linear projects such as roads and railways, though contribute to better infrastructure and enhance employment opportunities but severely change the landscape structure affecting peoples’ livelihood due to the reduction of ecosystem goods and services. Planned interventions are essential for adopting appropriate land-use trends and shift the trajectory of ecosystem service provision through prior visualization of land-use dynamics with likely impacts. The current study analyses the possible land-use changes in the ecologically fragile central Western Ghats with the proposed railway networks, namely (i) Mysore – Kushalnagar and (ii) Mysore- Thalassery (limited to Karnataka state), using an agent-based model (Fuzzy-AHP-CA-Markov) considering the linear project regions with a buffer of 5 km. The analyses reveal a reduction of forests by 2 and 5% respectively during 2010 and 2019. This trend would continue with a significant forest decline by 2026. Areas under built-up have increased over 5% during 2010 – 2019, which would increase by 7% (2019 and 2026) at the expense of cultivation lands. Major cities such as Mysore and Kushalnagara would witness concentrated urban growth with sprawl in the peripheries, while other towns have undergone leapfrog developments. The spatial distribution of fauna and flora indicates that most parts of the buffer region endow endemic species and serve as foraging grounds. Prediction of likely land uses in 2026 suggest that these regions would undergo large scale alterations threatening fauna and flora. Implementing linear projects in the ecologically fragile Western Ghats would further destabilize the region, posing a threat with the increased hazard frequencies and the sustenance of natural resources.

Keywords: Biodiversity, Corridor, Land use, linear projects, Visualisation, Western Ghats