Important biosphere reserves

Story hook

On 1 September 1986, in a remote stretch of the Western Ghats where the states of Tamil Nadu, Karnataka, and Kerala meet, India declared its first biosphere reserve — the Nilgiri Biosphere Reserve. Sprawling across 5,520 km², it stitched together Mudumalai, Bandipur, Nagarhole, and Mukurthi protected areas into a single landscape-level unit. The model was UNESCO's Man and the Biosphere (MAB) Programme — launched in 1971 to square the impossible circle of "conservation that includes the people who live there."

By 2024, India has 18 biosphere reserves covering ~6 % of its geographical area — and 12 of them are part of the World Network of Biosphere Reserves (WNBR). The last to join the global list was Panna in 2020. Each reserve has a Russian-doll architecture: a strictly protected core, a managed buffer, and a multi-use transition zone where farms, tea estates, and tribal hamlets continue to function.

This file walks through the 14 highest-yield biosphere reserves, their states, their flagship species, and why three of them (Nilgiri, Khangchendzonga, Sundarbans) appear in nearly every Environment Prelims paper.

Why this matters for UPSC

Biosphere reserves are a high-frequency Prelims topic — 1-2 MCQs every year on location, state, UNESCO listing, year of designation. Mains can ask analytical questions on landscape-level conservation and the core-buffer-transition model. Interview boards probe trade-offs between tribal rights (FRA 2006) and inviolate cores.