MP Board · Class 12 · Biology · Biodiversity and ConservationDistinguish between In-situ and Ex-situ conservation strategies of biodiversity. Give suitable examples for each and explain why both approaches are necessary for comprehensive biodiversity management.

Introduction to Biodiversity Conservation\nConservation of biodiversity is vital for the survival of human beings and the maintenance of biosphere equilibrium. Conservation strategies are broadly classified into two categories: In-situ (on-site) conservation and Ex-situ (off-site) conservation.

1. In-situ Conservation (On-site Conservation)

• Definition: In-situ conservation involves the protection of endangered plants and animals in their natural habitats. This approach preserves the entire ecosystem, allowing species to evolve and interact naturally.
• Key Methods in India:
  • National Parks: Areas reserved for wildlife where they can freely use habitats and natural resources (e.g., Jim Corbett National Park).
  • Wildlife Sanctuaries: Areas where only the protection of animals is given priority, and human activities like harvesting timber or collection of minor forest products are allowed under regulation (e.g., Bharatpur Bird Sanctuary).
  • Biosphere Reserves: Large protected areas of land meant for the conservation of wildlife, traditional lifestyle of tribals, and plant and animal genetic resources (e.g., Nilgiri Biosphere Reserve).
  • Sacred Groves: Tracts of forest set aside, and all the trees and wildlife within them are venerated and given total protection (e.g., Khasi and Jaintia Hills in Meghalaya).

2. Ex-situ Conservation (Off-site Conservation)

• Definition: Ex-situ conservation involves the protection of threatened animals and plants outside their natural habitats in specially managed facilities under human care.
• Key Methods:
  • Botanical Gardens and Zoological Parks: Living collections of plants and animals maintained for scientific study, education, and breeding programs.
  • Wildlife Safari Parks: Areas where animals roam in relatively large enclosures simulating natural habitats for public viewing and conservation breeding.
  • Cryopreservation: Preservation of gametes, eggs, embryos, and seeds of threatened species in viable and fertile condition for long periods using liquid nitrogen at -196°C.
  • Seed Banks: Storing seeds of diverse genetic strains of commercially and ecologically important plants under low temperature and moisture.

Conclusion: Why Both Are Necessary\nWhile In-situ conservation is the ideal approach because it preserves the natural evolutionary processes of species, Ex-situ conservation acts as an insurance policy. When species are on the verge of imminent extinction due to extreme habitat destruction or poaching, Ex-situ measures rescue them, breed them in captivity, and later reintroduce them into the wild.