Biodiversity

Science & Technology
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Version 1Updated 10 Mar 2026

Biodiversity, or biological diversity, is the variety of life on Earth. It is the most complex and vital feature of our planet. Without it, human life could not exist. It refers to the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species…

Quick Summary

Biodiversity, or biological diversity, is the variety of life on Earth at all levels, from genes to ecosystems. It is broadly categorized into genetic diversity (variation within a species), species diversity (number and abundance of different species), and ecosystem diversity (variety of habitats and ecological processes).

India is a mega-diverse country, hosting 7-8% of global recorded species and four of the world's 36 biodiversity hotspots: the Western Ghats, Eastern Himalaya, Indo-Burma, and Sundaland (Nicobar Islands).

These hotspots are characterized by high endemism and significant threats.

The primary threats to biodiversity in India include habitat loss and fragmentation (due to urbanization, agriculture, infrastructure), climate change impacts (sea-level rise, extreme weather, altered habitats), invasive alien species (outcompeting native flora/fauna), overexploitation (poaching, overfishing), and pollution (air, water, soil). These threats lead to rapid species extinction and ecosystem degradation.

Conservation strategies are broadly divided into in-situ (protecting species in their natural habitats) and ex-situ (conserving species outside their natural habitats). In-situ efforts in India include a vast network of National Parks, Wildlife Sanctuaries, Biosphere Reserves, and Community Reserves.

Ex-situ methods involve zoos, botanical gardens, seed banks (like NBPGR), and cryopreservation. India is a signatory to key international conventions such as the Convention on Biological Diversity (CBD), CITES, and the Ramsar Convention, demonstrating its global commitment.

Domestically, the Biological Diversity Act, 2002, establishes a three-tier institutional structure (National Biodiversity Authority, State Biodiversity Boards, Biodiversity Management Committees) to regulate access to biological resources and ensure Access and Benefit Sharing (ABS).

Other crucial laws include the Wildlife Protection Act, 1972, and the Forest Rights Act, 2006, which balances conservation with tribal rights. Government initiatives like Project Tiger and Project Elephant are flagship programs for species-specific conservation.

Despite these efforts, India faces ongoing biodiversity loss, with many species on the IUCN Red List and continued pressure on critical habitats.

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  • Biodiversity: Variety of life (genes, species, ecosystems).
  • India's Hotspots: Western Ghats, Eastern Himalaya, Indo-Burma, Sundaland (Nicobar).
  • Key Threats: Habitat loss, climate change, IAS, overexploitation, pollution.
  • Conservation: In-situ (PAs, BRs), Ex-situ (Zoos, Seed Banks).
  • Laws: BDA 2002 (NBA, ABS), WPA 1972, FRA 2006.

BIOME-SHIELD: Biodiversity (types), India's Hotspots, Overexploitation, Major Laws, Ecosystem Services - Species Loss, Habitat Destruction, Invasive Species, Ex-situ Conservation, Landmark Judgments, Development vs. Conservation.

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