Biodiversity and Conservation

Biodiversity and Conservation

Overview

This topic tests your understanding of ecological concepts, India's conservation framework, and factual knowledge about protected areas. The examiner frequently asks about recently notified reserves, differences between conservation categories, and India's international commitments.

India is one of 17 megadiverse countries, hosting nearly 7-8% of global recorded species on just 2.4% of world's land area. This biological richness, combined with rapid development pressures, makes conservation both urgent and exam-relevant. You must master the legal framework (Wildlife Protection Act, 1972), institutional mechanisms (National Wildlife Board, State Boards), and the hierarchy of protected areas.

Expect questions that test precise distinctions—between national parks and sanctuaries, between biosphere reserves and tiger reserves, or between in-situ and ex-situ methods. Map-based questions on locations of reserves are increasingly common.

Key Concepts

• Three levels of biodiversity: Genetic diversity (within species), species diversity (between species), and ecosystem diversity (variety of habitats). All three levels require conservation attention.
• Biodiversity hotspots: Regions with at least 1,500 endemic vascular plants and having lost 70% or more of original habitat. India has 4 hotspots: Western Ghats, Himalayas, Indo-Burma, and Sundaland (Nicobar Islands).
• In-situ conservation: Protecting species in their natural habitat through protected areas. Preferred method as it maintains evolutionary processes and ecosystem functions.
• Ex-situ conservation: Preserving species outside natural habitat—zoos, botanical gardens, gene banks, seed vaults. Acts as insurance against extinction but cannot maintain natural behaviour or evolution.
• Protected Area hierarchy in India: National Parks (strictest) → Wildlife Sanctuaries → Conservation Reserves → Community Reserves. Each has different restrictions on human activities.
• Biosphere Reserves: Based on UNESCO's Man and Biosphere (MAB) Programme. Contain core (no human activity), buffer (limited activity), and transition zones (sustainable development allowed).
• Project Tiger (1973) and Project Elephant (1992): Flagship species conservation programmes. Tiger reserves and elephant reserves are notified under these projects, often overlapping with existing protected areas.
• Endemism: Species found exclusively in a specific geographic area. High endemism indicates evolutionary isolation and demands priority conservation.

Key Facts

India's 4 Biodiversity Hotspots:

1. Western Ghats — 5,000+ flowering plants, 60% endemic amphibians
2. Himalayas — Snow leopard, red panda, Himalayan yew
3. Indo-Burma — Extends to Northeast India; hoolock gibbon, Manipur brow-antlered deer
4. Sundaland — Nicobar Islands portion; Nicobar megapode, saltwater crocodile

First protected areas:

• First National Park: Jim Corbett (1936, originally Hailey National Park)
• Largest National Park: Hemis (Ladakh)
• Largest Tiger Reserve: Nagarjunsagar-Srisailam (Andhra Pradesh-Telangana)

Worked Examples

Example 1: A question states: "Which of the following activities is permitted in a National Park but not in a Wildlife Sanctuary?"

Analysis: This is a trap question. The reverse is true—Wildlife Sanctuaries allow certain human activities (grazing, forest produce collection by locals with permission), while National Parks prohibit all such activities. In National Parks, even ownership rights are fully vested with government; in Sanctuaries, private ownership may continue.

Example 2: "Nokrek, Pachmarhi, and Simplipal are examples of what?"

Step 1: Identify commonality—all three are Biosphere Reserves. Step 2: Verify—Nokrek (Meghalaya), Pachmarhi (Madhya Pradesh), Simplipal (Odisha). Answer: UNESCO-designated Biosphere Reserves in India.

Example 3: "Which biodiversity hotspot covers maximum Indian states?"

Analysis: Himalayas span Jammu & Kashmir, Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh, and parts of other NE states. Indo-Burma covers NE states. Western Ghats covers Gujarat to Tamil Nadu (6 states). Answer: Himalayas (covers more states geographically).

Common Mistakes

• Confusing hotspot criteria: Students think "rich biodiversity" = hotspot. Wrong—hotspots require BOTH high endemism (1,500+ endemic vascular plants) AND severe habitat loss (70%+ lost). Amazon is megadiverse but not a hotspot by this definition.
• Mixing up National Park vs Sanctuary rights: Many assume National Parks are always larger or that both have same restrictions. Sanctuaries can be larger; the key difference is human activity and land ownership rights.
• Assuming Biosphere Reserves have legal protection: Biosphere Reserves are designated under UNESCO's MAB programme, NOT under Wildlife Protection Act. They have no statutory backing unless the core zone is separately notified as National Park/Sanctuary.
• Confusing Tiger Reserves with National Parks: Tiger Reserves are project-based administrative units under Project Tiger/NTCA. They may include National Parks, Sanctuaries, or territorial forest areas. Same tiger reserve can span multiple protected area categories.
• Forgetting Northeast India's biodiversity: Two hotspots (Himalayas, Indo-Burma) cover Northeast. Students often focus only on Western Ghats. NE has highest mammalian diversity in India.

Quick Reference

• 4 Hotspots in India: Western Ghats, Himalayas, Indo-Burma, Sundaland (Nicobar)
• Biosphere Reserve structure: Core → Buffer → Transition zones
• WPA 1972 hierarchy: National Park > Sanctuary > Conservation Reserve > Community Reserve
• National Parks: 106 | Sanctuaries: 567 | Tiger Reserves: 54 | Biosphere Reserves: 18
• First NP: Jim Corbett (1936) | Largest NP: Hemis | Largest TR: Nagarjunsagar-Srisailam
• Ex-situ examples: Zoos, gene banks, botanical gardens, cryopreservation, National Bureau of Plant Genetic Resources (NBPGR)