Biosphere Reserves of India: Complete Notes

A Biosphere Reserve is a protected area designated to conserve biodiversity, support sustainable development and enable scientific research. India currently has 18 Biosphere Reserves, several of which are also part of UNESCO's World Network of Biosphere Reserves, spread across diverse ecological zones from the Himalayas to the coasts.

Important reserves include Nilgiri (Tamil Nadu, Kerala, Karnataka), Nanda Devi (Uttarakhand), Nokrek (Meghalaya), Gulf of Mannar (Tamil Nadu), Sundarbans (West Bengal), Similipal (Odisha), Pachmarhi (Madhya Pradesh), Achanakmar–Amarkantak (Chhattisgarh and Madhya Pradesh), Great Nicobar (Andaman and Nicobar Islands), Agasthyamalai (Kerala and Tamil Nadu), Khangchendzonga (Sikkim), Panna (Madhya Pradesh), Dibru-Saikhowa and Manas (Assam), Dihang-Dibang (Arunachal Pradesh), Cold Desert (Himachal Pradesh), Seshachalam Hills (Andhra Pradesh), and Kachchh (Gujarat). For Prelims, the total figure of 18 reserves and their state-wise distribution is directly testable, while for Mains this topic connects to broader themes of biodiversity conservation, sustainable development and community-based conservation models under GS Paper III.

India's Biosphere Reserve network follows a zonation model consisting of a core area kept free from human activity, a buffer zone permitting limited regulated use, and a transition zone where sustainable human activity is actively encouraged — a structure that is frequently tested in Prelims to distinguish Biosphere Reserves from National Parks and Wildlife Sanctuaries, which do not follow the same three-zone model. Aspirants should also be able to name at least two or three UNESCO-recognised reserves among India's 18, since Prelims questions sometimes specifically ask which reserves carry this additional international designation.

In short: 18 reserves, the core-buffer-transition zonation model, and a handful of state pairings are usually sufficient to handle most Prelims-level questions on this topic.