Biodiversity of India is an important topic in Environment and Ecology for UPSC Civil Services, APPSC Group 1, APPSC Group 2, TSPSC Group 1 and other competitive examinations. India is a megadiverse country with a wide variety of ecosystems, including Himalayan forests, tropical rainforests, grasslands, deserts, wetlands, mangroves and coral reefs.
Understanding Indian biodiversity requires knowledge of protected areas, endemic and endangered species, national parks, wildlife conservation programmes and environmental legislation. These notes explain the major concepts, important examples and legal provisions in a structured, examination-oriented format.
1. What Is Biodiversity?
Biodiversity refers to the variability among living organisms from all sources, including terrestrial, marine and other aquatic ecosystems, and the ecological complexes of which they are part. It includes diversity within species, between species and of ecosystems.
Types of biodiversity
1. Genetic diversity
Genetic diversity refers to variations in genes within a species. It enables populations to adapt to environmental changes and helps improve the resilience of crops and livestock.
Example: Different varieties of rice, wheat and mango cultivated in India.
2. Species diversity
Species diversity refers to the variety of species present in a particular geographical area.
Example: The Western Ghats support a rich diversity of amphibians, reptiles, mammals, birds and flowering plants.
3. Ecosystem diversity
Ecosystem diversity refers to the variety of ecosystems and habitats in a region.
Examples: Himalayan ecosystems, tropical evergreen forests, mangroves, deserts, grasslands, wetlands and coral reefs.
Why is India considered a megadiverse country?
India is recognised as one of the world's megadiverse countries because of its varied geographical features, climatic conditions, ecosystems and rich biological resources.
Important factors include:
- Wide variations in altitude, temperature and rainfall.
- Diverse ecosystems ranging from the Himalayas to tropical coastal habitats.
- High levels of endemism in regions such as the Western Ghats and the Andaman and Nicobar Islands.
- Rich agricultural biodiversity and traditional varieties of crops.
- Important habitats for globally threatened species.
India contains parts of four globally recognised biodiversity hotspots: the Himalaya, Indo-Burma, Western Ghats–Sri Lanka and Sundaland. Within India, the Nicobar Islands form part of the Sundaland hotspot.
2. Protected Areas in India
What are protected areas?
Protected areas are geographically defined areas managed or designated for the long-term conservation of nature, wildlife, habitats and ecological processes.
Protected areas help prevent habitat destruction, conserve endangered species, maintain ecosystem services and support scientific research.
India's protected-area network includes national parks, wildlife sanctuaries, conservation reserves, community reserves and other conservation categories. Tiger reserves and biosphere reserves are also important frameworks for conservation, although they are not identical legal categories.
The Wildlife Institute of India reports approximately 1,134 protected areas in its published overview, including 106 national parks, 574 wildlife sanctuaries, 58 tiger reserves and 132 coastal and marine protected areas. These categories overlap and must not be added together as if they were mutually exclusive. Check the latest official database before publishing updated counts.
Types of protected areas in India
2.1 National Parks
National parks are legally designated areas established to protect wildlife, vegetation, natural landscapes and ecological processes.
They are notified under the Wild Life (Protection) Act, 1972. The Act provides stronger restrictions on activities such as grazing and the removal of forest produce, subject to its provisions.
Examples:
- Kaziranga National Park, Assam — Indian one-horned rhinoceros.
- Gir National Park, Gujarat — Asiatic lion.
- Eravikulam National Park, Kerala — Nilgiri tahr.
- Keibul Lamjao National Park, Manipur — Sangai deer.
2.2 Wildlife Sanctuaries
Wildlife sanctuaries are designated to protect wild animals, birds, plants and their habitats. Certain activities and rights may continue where permitted by applicable law.
Examples:
- Eturnagaram Wildlife Sanctuary, Telangana.
- Vedanthangal Bird Sanctuary, Tamil Nadu.
- Ranganathittu Bird Sanctuary, Karnataka.
- Indian Wild Ass Sanctuary, Gujarat.
2.3 Biosphere Reserves
Biosphere reserves promote biodiversity conservation while encouraging research, education and sustainable human activity.
Under UNESCO's Man and the Biosphere Programme, biosphere reserves use a zonation approach.
- Core zone: Focuses on strict conservation.
- Buffer zone: Supports research, education and compatible activities.
- Transition zone: Accommodates sustainable human activities and settlements.
Examples: Nilgiri, Gulf of Mannar, Sundarbans, Nanda Devi and Agasthyamala.
India's national biosphere reserve programme and UNESCO's World Network of Biosphere Reserves are distinct. Not every Indian biosphere reserve is automatically part of UNESCO's international network.
2.4 Tiger Reserves
Tiger reserves are established under the Project Tiger framework and the relevant provisions of the Wild Life (Protection) Act, 1972.
Their management aims to conserve tigers, prey species, habitats and ecological connectivity.
Tiger reserves generally include core or critical tiger habitat and buffer areas.
Examples: Corbett, Bandipur, Nagarhole, Kanha, Periyar and Tadoba-Andhari.
2.5 Conservation Reserves
Conservation reserves are generally established on government-owned land, particularly areas adjoining national parks and sanctuaries or connecting protected habitats.
They are declared by state governments under Section 36A of the Wild Life (Protection) Act, 1972.
They are particularly important for protecting wildlife corridors and landscapes outside conventional protected areas.
2.6 Community Reserves
Community reserves may be established on private or community land where individuals or communities voluntarily participate in wildlife conservation.
They are recognised under Section 36C of the Wild Life (Protection) Act, 1972.
Community reserves encourage local participation in habitat protection and biodiversity conservation.
Difference between a national park and a wildlife sanctuary
| Feature | National Park | Wildlife Sanctuary |
|---|---|---|
| Primary objective | Protect ecosystems, wildlife and habitats | Protect wildlife and habitats |
| Legal basis | Wild Life (Protection) Act, 1972 | Wild Life (Protection) Act, 1972 |
| Human activities | Subject to stronger statutory restrictions | Certain activities may be permitted under law |
| Grazing | Generally prohibited, subject to statutory provisions | May be permitted or regulated where legally applicable |
| Example | Kaziranga National Park | Eturnagaram Wildlife Sanctuary |
Importance of protected areas
Protected areas contribute to:
- Conservation of endangered and endemic species.
- Protection of forests, wetlands, grasslands and marine ecosystems.
- Maintenance of food chains and ecological processes.
- Prevention of habitat degradation and poaching.
- Scientific research, ecological monitoring and education.
- Climate resilience and protection of ecosystem services.
Challenges in protected-area management
Major challenges include habitat fragmentation, illegal wildlife trade, forest fires, invasive alien species, human–wildlife conflict, infrastructure development and climate change.
Wildlife corridors and landscape-level conservation are important because many species move beyond the boundaries of individual protected areas.
3. Important Species of India
India supports a wide range of mammals, birds, reptiles, amphibians, fish, insects and plants. Species conservation requires knowledge of their geographical distribution, habitat requirements, ecological roles and threats.
Important categories of species
Endemic species: Species naturally restricted to a particular geographical region.
Endangered species: Species facing a very high risk of extinction in the wild according to the IUCN Red List criteria.
Critically Endangered species: Species facing an extremely high risk of extinction in the wild.
Vulnerable species: Species facing a high risk of extinction in the wild.
Keystone species: Species that have a disproportionately large influence on ecosystem structure and functioning.
Flagship species: Species used to generate public support for conservation.
Indicator species: Species whose presence, absence or condition provides information about environmental quality.
These terms describe different characteristics. For example, a species may be endemic and endangered at the same time. IUCN conservation categories must not be confused with the schedules under Indian wildlife legislation.
Important endemic species of India
| Species | Important distribution | Significance |
|---|---|---|
| Lion-tailed macaque | Western Ghats | Endemic primate of tropical evergreen forests |
| Nilgiri tahr | Southern Western Ghats | Mountain ungulate associated with montane grasslands |
| Purple frog | Western Ghats | Distinctive amphibian that spends much of its life underground |
| Nicobar megapode | Nicobar Islands | Ground-dwelling bird with distinctive mound incubation |
| Sangai deer | Manipur | Associated with floating vegetation and wetland habitats |
| Forest owlet | Central India | Rare forest-dwelling bird with a restricted distribution |
Important threatened species and their habitats
| Species | Important habitat or region | Major threats |
|---|---|---|
| Bengal tiger | Forests and grasslands across several Indian landscapes | Habitat fragmentation, poaching and conflict |
| Asiatic lion | Gir landscape, Gujarat | Restricted distribution, disease and conflict |
| Great Indian bustard | Arid grasslands, particularly Rajasthan and Gujarat | Power-line collisions and habitat degradation |
| Ganges river dolphin | Ganga–Brahmaputra river systems | Pollution, fishing gear and river modification |
| Gharial | Selected river systems, including the Chambal | River modification and fishing-related mortality |
| Red panda | Eastern Himalayan forests | Habitat loss and fragmentation |
| Hangul | Dachigam landscape, Jammu and Kashmir | Small population and habitat pressures |
| Dugong | Shallow coastal waters, including the Gulf of Mannar | Seagrass loss and fishing-related threats |
| Asian elephant | Forest landscapes across several Indian regions | Corridor fragmentation and human–elephant conflict |
Species distributions and conservation categories can change as new assessments become available. Consult the IUCN Red List and relevant Indian government sources for the latest status.
Major biodiversity hotspots associated with India
A biodiversity hotspot is a region with exceptionally high plant endemism that has experienced substantial habitat loss. The concept helps identify areas where conservation action is particularly urgent.
Four global hotspots extend into Indian territory:
- Himalaya: Mountain ecosystems, alpine habitats and rich endemic biodiversity.
- Indo-Burma: Northeastern India and adjacent regions, with diverse forests and freshwater ecosystems.
- Western Ghats–Sri Lanka: Tropical forests with high levels of endemic plants, amphibians and other species.
- Sundaland: Includes the Nicobar Islands within the broader hotspot.
Major threats to biodiversity in India
- Habitat loss and fragmentation.
- Poaching and illegal wildlife trade.
- Invasive alien species.
- Pollution of rivers, wetlands and coastal ecosystems.
- Climate change and extreme weather events.
- Forest fires and degradation.
- Unsustainable exploitation of biological resources.
- Human–wildlife conflict.
Important species conservation programmes
Project Tiger (1973): Focuses on tiger conservation, habitat management and anti-poaching measures.
Project Elephant (1992): Supports elephant habitat conservation, corridor protection and human–elephant conflict mitigation.
Crocodile Conservation Project (1975): Supports the conservation and recovery of threatened crocodilians.
Project Snow Leopard (2009): Promotes landscape-based conservation in the Indian Himalayan region.
Project Dolphin (2020): Supports conservation of riverine and marine dolphins.
Species recovery programmes also target selected threatened animals and plants through habitat protection, scientific monitoring and coordinated conservation action.
4. National Parks in India: Important Examples
National parks are an important area of study for UPSC, APPSC and TSPSC because questions frequently connect a park with its state, geographical region, flagship species or ecological significance.
The following table lists important national parks for revision. It is not an exhaustive list of every national park in India.
| National Park | State or Union Territory | Important feature |
|---|---|---|
| Jim Corbett | Uttarakhand | Established in 1936 as Hailey National Park; tiger conservation |
| Kaziranga | Assam | Indian one-horned rhinoceros |
| Manas | Assam | Tiger, golden langur and pygmy hog habitat |
| Namdapha | Arunachal Pradesh | Eastern Himalayan forest biodiversity |
| Hemis | Ladakh | Snow leopard habitat |
| Dachigam | Jammu and Kashmir | Hangul |
| Great Himalayan | Himachal Pradesh | Himalayan ecosystems |
| Ranthambore | Rajasthan | Tiger |
| Keoladeo National Park | Rajasthan | Wetland and migratory birds |
| Desert National Park | Rajasthan | Great Indian bustard habitat |
| Gir | Gujarat | Asiatic lion |
| Kanha | Madhya Pradesh | Tiger and hard-ground barasingha |
| Bandhavgarh | Madhya Pradesh | Tiger |
| Panna | Madhya Pradesh | Tiger and Ken River landscape |
| Kuno | Madhya Pradesh | Reintroduced cheetahs |
| Tadoba-Andhari | Maharashtra | Tiger |
| Bandipur | Karnataka | Tiger and elephant |
| Nagarhole | Karnataka | Tiger and elephant |
| Periyar | Kerala | Elephant and tiger |
| Eravikulam | Kerala | Nilgiri tahr |
| Silent Valley | Kerala | Tropical evergreen forest and lion-tailed macaque habitat |
| Mudumalai | Tamil Nadu | Tiger and elephant |
| Gulf of Mannar Marine National Park | Tamil Nadu | Coral reefs and seagrass ecosystems |
| Similipal | Odisha | Forest ecosystems and tiger habitat |
| Bhitarkanika | Odisha | Mangroves and saltwater crocodiles |
| Sundarbans | West Bengal | Mangroves and Bengal tiger |
| Dudhwa | Uttar Pradesh | Terai ecosystems and swamp deer |
| Valmiki | Bihar | Terai forests and tiger habitat |
| Keibul Lamjao | Manipur | Sangai deer and floating phumdis |
| Khangchendzonga | Sikkim | High-altitude Himalayan biodiversity |
| Papikonda | Andhra Pradesh | Eastern Ghats and Godavari river landscape |
| Sri Venkateswara | Andhra Pradesh | Eastern Ghats forests |
| Mahavir Harina Vanasthali | Telangana | Blackbuck and urban-fringe habitat |
| Kasu Brahmananda Reddy | Telangana | Urban biodiversity in Hyderabad |
| Mrugavani | Telangana | Dry deciduous forest and local wildlife |
National parks in Andhra Pradesh and Telangana
For state-level examinations, aspirants should learn the national parks in Andhra Pradesh and Telangana along with their locations and ecological features.
Andhra Pradesh
- Papikonda National Park.
- Sri Venkateswara National Park.
Telangana
- Kasu Brahmananda Reddy National Park.
- Mahavir Harina Vanasthali National Park.
- Mrugavani National Park.
Verify current official notifications and boundaries when preparing a definitive state-wise list.
National parks and international designations
National park status, UNESCO World Heritage status and Ramsar Site status are different designations.
- National park: Domestic legal protection under Indian law.
- UNESCO World Heritage Site: International recognition of outstanding universal value.
- Ramsar Site: Wetland recognised as internationally important.
- Biosphere Reserve: A conservation and sustainable-development framework.
A single geographical area can have more than one designation.
5. Wildlife Protection Act, 1972
The Wild Life (Protection) Act, 1972, is India's principal central legislation for wildlife conservation. It provides the legal framework for protecting specified wild animals, birds and plants, regulating wildlife-related trade, establishing protected areas and penalising wildlife offences.
Objectives of the Act
- Protect wild animals, birds and specified plants.
- Restrict hunting of protected wildlife, subject to statutory exceptions.
- Provide for the declaration and management of protected areas.
- Regulate possession, transport and trade in wildlife and wildlife products.
- Establish statutory institutions for wildlife conservation.
- Support compliance with international wildlife-trade obligations.
Important authorities under the Act
National Board for Wildlife (NBWL): Advises the Central Government on wildlife conservation policy and related matters.
National Tiger Conservation Authority (NTCA): Provides statutory oversight for tiger conservation and tiger-reserve management.
Central Zoo Authority (CZA): Regulates zoos and promotes standards for zoo management and conservation.
Wildlife Crime Control Bureau (WCCB): Helps combat organised wildlife crime and illegal wildlife trade.
Chief Wildlife Warden: Performs important statutory functions at the state level.
Wild Life (Protection) Amendment Act, 2022
The 2022 amendment strengthened and revised parts of the wildlife legislation, including provisions concerning international wildlife trade and the CITES framework.
Important changes include:
- Revision of the schedules under the Act.
- Provisions relating to CITES-listed specimens.
- Measures concerning invasive alien species.
- Changes to compliance and implementation provisions.
The amended schedule framework came into force on 1 April 2023.
Four schedules under the amended Act
| Schedule | Broad coverage |
|---|---|
| Schedule I | Specified animal species receiving the highest level of protection under the Act |
| Schedule II | Other specified protected animal species |
| Schedule III | Specified protected plant species |
| Schedule IV | Specimens listed under the CITES framework covered by the Act |
Older textbooks may refer to six schedules. For current examination preparation, study the revised four-schedule framework and consult the current statutory text for species-specific details.
6. Other Important Environmental Laws in India
Indian Forest Act, 1927
The Act consolidates provisions relating to forests, forest produce and specified forest offences. It is an important part of India's forest-law framework.
Forest (Conservation) Act, 1980
Now titled the Van (Sanrakshan Evam Samvardhan) Adhiniyam, 1980, this legislation regulates specified changes in the legal status of forest land and its use for non-forest purposes.
Environment (Protection) Act, 1986
This umbrella legislation empowers the Central Government to take measures to protect and improve environmental quality. It provides the basis for several environmental rules, standards and notifications.
Biological Diversity Act, 2002
The Act focuses on biodiversity conservation, sustainable use of biological resources and fair and equitable sharing of benefits arising from their use.
Its institutional framework includes:
- National Biodiversity Authority.
- State Biodiversity Boards.
- Biodiversity Management Committees.
The Biological Diversity (Amendment) Act, 2023 introduced changes to the regulatory framework.
Forest Rights Act, 2006
The Scheduled Tribes and Other Traditional Forest Dwellers (Recognition of Forest Rights) Act, 2006, recognises specified individual and community forest rights of eligible forest-dwelling communities, subject to statutory requirements.
Compensatory Afforestation Fund Act, 2016
This Act provides the framework for managing compensatory afforestation funds associated with forest-land diversion and related activities.
7. Important International Conventions on Biodiversity
| Convention | Year | Main objective |
|---|---|---|
| Ramsar Convention | 1971 | Conservation and wise use of wetlands |
| UNESCO World Heritage Convention | 1972 | Protection of cultural and natural heritage of outstanding universal value |
| CITES | 1973 | Regulation of international trade in listed wild animals, plants and specimens |
| Convention on Migratory Species (CMS) | 1979 | Conservation of migratory wild animals |
| Convention on Biological Diversity (CBD) | 1992 | Biodiversity conservation, sustainable use and benefit-sharing |
These conventions have different objectives. CITES focuses on international trade, Ramsar focuses on wetlands, and the CBD addresses biodiversity more broadly.
8. Frequently Asked Questions: Biodiversity of India
What is biodiversity?
Biodiversity is the variety and variability of living organisms and the ecological complexes of which they are part. It includes genetic diversity, species diversity and ecosystem diversity.
Why is India called a megadiverse country?
India has diverse climatic conditions, geographical regions, ecosystems and a rich variety of species, including many endemic plants and animals.
What are the major types of protected areas in India?
Important categories include national parks, wildlife sanctuaries, conservation reserves and community reserves. Tiger reserves and biosphere reserves are also important conservation frameworks.
What is the difference between a national park and a wildlife sanctuary?
Both are protected under the Wild Life (Protection) Act, 1972. National parks generally have stronger statutory restrictions on activities such as grazing and removal of forest produce, while certain activities may be permitted in sanctuaries under applicable law.
Which law protects wildlife in India?
The Wild Life (Protection) Act, 1972, is India's principal central wildlife-protection legislation.
How many schedules are there under the amended Wild Life (Protection) Act?
The amended Act has four schedules, effective from 1 April 2023.
What is an endemic species?
An endemic species is naturally restricted to a particular geographical region. The lion-tailed macaque and Nilgiri tahr are examples associated with the Western Ghats.
What is the difference between a biosphere reserve and a national park?
A national park is a domestic legal designation under Indian wildlife law. A biosphere reserve is a broader conservation framework that combines biodiversity protection with research, education and sustainable human activity.
What are the major threats to biodiversity in India?
Major threats include habitat destruction, fragmentation, poaching, invasive alien species, pollution, climate change and human–wildlife conflict.
Which national parks are important for APPSC and TSPSC?
Candidates should prioritise national parks in Andhra Pradesh and Telangana, as well as nationally important parks such as Kaziranga, Gir, Corbett, Sundarbans, Keibul Lamjao and Eravikulam.
Conclusion
Biodiversity conservation in India depends on effective protected-area management, species recovery programmes, habitat connectivity, community participation and enforcement of environmental laws. For competitive examinations, aspirants should connect ecological concepts with important species, national parks, conservation programmes and current legal provisions.
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Educational note: Wildlife counts, conservation categories, legal provisions and official notifications may change. Consult the latest government and statutory sources before relying on time-sensitive figures.