MP Board · Class 12 · Biology · Biodiversity and ConservationWhat are the two major approaches to biodiversity conservation? Describe in detail the 'In situ' and 'Ex situ' conservation methods with suitable examples.

Introduction to Biodiversity Conservation\nBiodiversity conservation is the protection, management, and restoration of biodiversity to ensure its sustainable use for present and future generations. Conservation strategies are broadly classified into two main categories: In situ conservation and Ex situ conservation.

1. In situ Conservation (On-site Conservation)\nIn situ conservation involves protecting endangered plants and animals in their natural habitats. This approach preserves the entire ecosystem, allowing species to continually evolve in their natural environment.

• National Parks: These are areas strictly reserved for the betterment of wildlife where private ownership, grazing, or forestry is prohibited. Example: Jim Corbett National Park, Kaziranga National Park.
• Wildlife Sanctuaries: Areas where only wild animals are protected, and human activities like harvesting timber and private ownership are permitted to a limited extent. Example: Periyar Wildlife Sanctuary.
• Biosphere Reserves: Large areas of protected land meant for preserving biodiversity and traditional lifestyles of tribal people. They usually consist of core, buffer, and transition zones. Example: Nilgiri Biosphere Reserve, Nanda Devi.
• Sacred Groves/Forests: Tracts of forest set aside, which are venerated and protected by local communities due to religious beliefs (e.g., Khasi and Jaintia Hills in Meghalaya).

2. Ex situ Conservation (Off-site Conservation)\nEx situ conservation involves the maintenance and breeding of endangered plants and animals outside their natural habitats under human supervision.

• Botanical Gardens and Arboreta: Collections of living plants grown for scientific study, conservation, and public education. Example: Royal Botanic Gardens, Kew, and Indian Botanical Garden, Howrah.
• Zoological Parks (Zoos): Facilities where wild animals are kept within enclosures for public exhibition, captive breeding, and conservation research.
• Wildlife Safari Parks: Large areas where visitors can view wild animals roaming freely in simulated natural habitats.
• Seed Banks and Gene Banks: Facilities that store seeds, gametes, or tissue cultures of endangered plant and animal species at very low temperatures (cryopreservation) to prevent genetic erosion.

Conclusion\nBoth in situ and ex situ approaches complement each other. While in situ conservation is ideal as it maintains natural evolutionary processes, ex situ conservation provides a crucial backup during acute habitat loss or catastrophic population declines.