Biosphere reserves

1. Concept, objectives and international framework

A biosphere reserve is a representative area of terrestrial, coastal or marine ecosystems, or a combination of them, where biodiversity conservation is integrated with sustainable resource use. Unlike an approach centred only on fencing off wildlife habitat, the biosphere-reserve model treats people, livelihoods and ecological processes as connected. It seeks to maintain genetic diversity, species, ecosystems and landscapes while testing locally appropriate development practices.

UNESCO’s Man and the Biosphere Programme, commonly called MAB, is an intergovernmental scientific programme launched in 1971. Its World Network of Biosphere Reserves provides sites for research, education, monitoring and exchange of management experience. The Seville Strategy and the Statutory Framework of the World Network, adopted in 1995, clarified the functions, designation criteria and review arrangements of the network.

Every biosphere reserve should fulfil three mutually reinforcing functions. Conservation protects biodiversity and ecological processes. Development promotes economically and socially sustainable activities. Logistic support enables demonstration projects, environmental education, training, research and monitoring. Thus, a reserve should operate as a learning site for sustainability rather than merely as a wildlife refuge.

Countries nominate sites, and UNESCO’s MAB International Coordinating Council decides their inclusion in the network. Sites remain under national jurisdiction. Periodic review normally occurs every ten years to assess whether a reserve continues to meet the framework’s criteria. UNESCO biosphere-reserve recognition is distinct from World Heritage inscription and Ramsar designation, although these labels can overlap geographically.

2. Core, buffer and transition zones

Zonation reconciles strict ecological protection with surrounding human activity. The core area comprises one or more legally protected areas devoted to long-term conservation. It should protect important ecosystems and species with minimal disturbance. Non-destructive research and monitoring may be compatible with its purpose, but extractive use is generally excluded or tightly restricted under the applicable law.

The buffer zone surrounds or adjoins the core. Activities must be compatible with conservation objectives. Examples include ecological research, restoration, environmental education and carefully regulated tourism. A buffer is not an unrestricted commercial-use belt: infrastructure, visitor numbers and resource use must be assessed against their impacts on the core and wider ecosystem.

The transition area is the outer cooperative zone, where settlements, agriculture and other economic activities may occur. Communities, public authorities, researchers and businesses work together on sustainable land and water management. Agroforestry, efficient irrigation, community enterprises and responsible tourism can reduce pressure on sensitive habitats while maintaining livelihoods.

The familiar diagram of three concentric rings is only a teaching aid. Actual reserves may have several core areas, irregular boundaries and marine components. Ecological corridors and catchments may extend beyond administrative borders. Furthermore, a biosphere-reserve buffer is not automatically the same as a tiger reserve’s buffer, and its transition area is not automatically an eco-sensitive zone notified under environmental law.

3. Indian designation, legal status and governance

India initiated its Biosphere Reserve Programme in 1986, with Nilgiri as the first designation. The Ministry of Environment, Forest and Climate Change coordinates the programme nationally, while states and Union Territories undertake site-level implementation with relevant departments, scientific institutions and local communities. National designation and UNESCO recognition are separate processes: a nationally designated reserve need not already belong to the World Network.

A biosphere reserve is not a separate statutory protected-area category under the Wild Life (Protection) Act, 1972. National parks, wildlife sanctuaries, conservation reserves and community reserves have specific legal provisions; a biosphere reserve is a broader conservation and development framework. Its core may include national parks or sanctuaries, while other parts may contain reserved forests, villages, agricultural land or coastal waters.

Consequently, restrictions derive from the laws applicable to each constituent area, not simply from the biosphere-reserve label. Relevant instruments can include wildlife and forest legislation, the Environment (Protection) Act, 1986, coastal regulations and the Biological Diversity Act, 2002. The Scheduled Tribes and Other Traditional Forest Dwellers (Recognition of Forest Rights) Act, 2006 is important for recognising applicable community and individual rights.

Effective governance requires more than interdepartmental coordination. Gram Sabhas, Biodiversity Management Committees and livelihood groups can contribute local ecological knowledge and shape benefit-sharing arrangements. Conservation objectives should be pursued through lawful, rights-sensitive processes rather than assuming that designation automatically extinguishes existing rights or requires relocation.

4. Indian distribution and examination priorities

India’s biosphere reserves represent major biogeographic settings: Himalayan landscapes, deserts, the Western Ghats, northeastern hills, central Indian forests, mangroves, coasts and islands. Nilgiri spans Tamil Nadu, Kerala and Karnataka. Gulf of Mannar lies in Tamil Nadu and includes important marine ecosystems. Sundarban in West Bengal protects a tidal mangrove landscape, while Great Nicobar represents tropical island ecosystems.

Several names require careful map-based revision. Nokrek is in Meghalaya, Dibru-Saikhowa in Assam, Dihang-Dibang in Arunachal Pradesh and Khangchendzonga in Sikkim. Similipal is in Odisha, Pachmarhi in Madhya Pradesh and Achanakmar–Amarkantak spans Chhattisgarh and Madhya Pradesh. Cold Desert is in Himachal Pradesh, whereas Nanda Devi is in Uttarakhand.

As of September 2025, India has 18 national biosphere reserves and 13 UNESCO-recognised reserves. The five national reserves outside the World Network are Manas, Dibru-Saikhowa, Dihang-Dibang, Kachchh and Seshachalam Hills. Cold Desert became the thirteenth UNESCO-recognised Indian reserve in 2025. Always attach a reference date to membership counts because international recognition changes over time.

For Prelims, prioritise state–reserve pairs, ecosystem types, first designations and distinctions between overlapping labels. Nilgiri Biosphere Reserve is not identical to a single national park, and UNESCO recognition of a biosphere reserve does not mean that its entire area is a UNESCO World Heritage property.

5. Conservation significance and management challenges

Biosphere reserves support landscape-scale conservation by linking protected cores with surrounding production landscapes. They can conserve watershed functions, soil stability, pollinators and carbon stocks while providing space for species movement. Long-term monitoring helps distinguish climatic changes from local pressures and supports adaptive management.

Major threats include habitat fragmentation, invasive alien species, unsustainable tourism, pollution, extraction and human–wildlife conflict. Climate change adds risks such as shifting Himalayan vegetation, altered fire regimes, coral bleaching and coastal inundation. Protection of a core alone cannot address upstream water diversion, roads outside its boundary or pollution entering from surrounding settlements.

Management priorities include ecological connectivity, restoration using suitable native species, regulated visitor use, sustainable livelihood incentives and meaningful community participation. Monitoring should track ecological and social outcomes together: habitat condition, water quality, species trends, livelihood security and the distribution of conservation costs. Success means sustaining biodiversity alongside equitable development, not merely obtaining an international designation.

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