Biodiversity and Conservation

We are living through the sixth mass extinction in Earth's history — the Holocene extinction — caused not by asteroid impact or volcanic eruption but by human activity. Species are disappearing at 100–1,000 times the natural background rate. This biodiversity crisis matters not just for nature's intrinsic value but because biodiversity underpins the ecosystem services — clean water, fertile soil, pollination, climate regulation, disease control — on which human civilisation depends.

This chapter is directly mapped to UPSC GS Paper 3 (environment) questions on biodiversity loss, conservation frameworks, and India's biodiversity governance. It also connects to GS Paper 1 geography questions on distribution of flora and fauna.

PART 1 — Quick Reference Tables

Table 1: Types of Biodiversity

Table 2: IUCN Red List Categories

Table 3: Threats to Biodiversity (HIPPO Framework)

(HIPPO is a standard mnemonic for biodiversity threats)

Table 4: Conservation Strategies

Table 5: Key International Conventions and Bodies

PART 2 — Detailed Notes

Why Biodiversity Matters: Ecosystem Services

Biodiversity is not merely an aesthetic concern — it underpins ecosystem services that sustain human welfare:

Provisioning services: Food (crops, livestock, fish, game), water, medicines (80% of drugs have natural origins), raw materials (timber, fibre, rubber).

Regulating services: Climate regulation (forests store carbon), water purification (wetlands filter pollutants), flood control (mangroves buffer storm surge), pollination (~35% of global food production depends on animal pollination), pest control (natural predators).

Supporting services: Soil formation, nutrient cycling, primary production — the foundations underlying all other services.

Cultural services: Recreation, tourism, aesthetic value, spiritual significance.

The Economics of Ecosystems and Biodiversity (TEEB) project estimates that ecosystem services are worth trillions of dollars annually — far exceeding the economic gains from exploiting or destroying them.

💡 Explainer: Genetic Diversity and Agricultural Security

Genetic diversity within crop species is the raw material for plant breeding — the source of resistance genes to new pests and diseases, drought tolerance, and yield improvements. India's traditional varieties (landraces) of rice, wheat, and millets contain invaluable genetic material:

• The Kuttanad wetlands of Kerala preserve unique flood-tolerant rice varieties
• The North East is the centre of diversity for many cultivated plants (rice, jute, banana, citrus)
• Loss of landraces (replaced by high-yield varieties) is genetic erosion — narrowing the genetic base of agriculture

The Green Revolution of the 1960s–70s increased yields dramatically but reduced genetic diversity (fewer varieties planted). This creates vulnerability — a single pathogen could devastate a genetically uniform crop.

IUCN Red List: Assessment Process

The IUCN (International Union for Conservation of Nature) Red List is the world's most comprehensive inventory of the conservation status of species. Assessment criteria include:

• Rate of population decline
• Geographic range size (area of occupancy, extent of occurrence)
• Small population size and fragmentation
• Quantitative probability of extinction

India has ~3,000+ animal species on the IUCN Red List. Critical cases:

• Great Indian Bustard: Critically Endangered; ~150 remaining; threatened by power lines, habitat loss in Rajasthan and Gujarat
• Gangetic River Dolphin: Endangered; India's National Aquatic Animal; threatened by river pollution, dams, fishing nets
• Snow Leopard: Vulnerable; ~450–500 in India (Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh)

In-situ Conservation: India's Protected Area Network

India has a tiered Protected Area system:

National Parks: Highest level of protection. No human habitation, grazing, or resource extraction inside core area. 106 national parks covering ~1.25% of India's area. Examples: Jim Corbett (first, 1936), Kanha, Kaziranga, Sundarbans, Great Himalayan NP.

Wildlife Sanctuaries: Allow limited human activity (non-destructive). 567 sanctuaries covering ~4% of area. May have human settlements with regulated use.

Biosphere Reserves: UNESCO concept — integrate conservation with sustainable development. Core zone (strict), buffer zone (limited research/tourism), transition zone (human settlements). India has 18 BRs; 12 designated in UNESCO MAB Programme. Examples: Nilgiri (first, 1986), Sundarbans, Gulf of Mannar, Great Nicobar, Nanda Devi.

Tiger Reserves (Project Tiger): Launched in 1973 with 9 reserves; now 55 reserves (2024). India's tiger population has grown from ~1,800 (2010) to ~3,682 (2022 census) — a global conservation success story.

Community Reserves and Conservation Reserves: New categories under Wildlife Protection Act (Amendment) 2002, recognising community-led conservation.

🎯 UPSC Connect: India's Biodiversity Governance

Biological Diversity Act, 2002: India's primary domestic law implementing CBD commitments:

• Establishes National Biodiversity Authority (NBA) at national level
• State Biodiversity Boards (SBBs) at state level
• Biodiversity Management Committees (BMCs) at local body level — prepare People's Biodiversity Register (PBR)
• Regulates access to India's biological resources and traditional knowledge; requires prior informed consent

National Biodiversity Strategy and Action Plan (NBSAP) 2008–2020: India's implementation plan for CBD. Updated as India works toward the Kunming–Montreal Global Biodiversity Framework (GBF) targets adopted at COP15 (2022):

• 30×30: Protect 30% of land and oceans by 2030
• Halt and reverse biodiversity loss by 2030
• Mobilise US$200 billion/year for biodiversity

Key species programmes:

• Project Tiger (1973): Success story
• Project Elephant (1992): ~30,000 elephants; 33 Elephant Reserves
• Project Crocodile (1975): Mugger, Saltwater, Gharial
• Sea Turtle Conservation: Marine turtle nesting sites on Odisha coast (Olive Ridley mass nesting — arribada — at Gahirmatha)
• Cheetah Reintroduction (2022): 20 Namibian and South African cheetahs brought to Kuno National Park (Madhya Pradesh) — first major wildlife translocation across continents

Ex-situ Conservation: Off-site Protection

Ex-situ conservation keeps organisms outside their natural habitat:

• Seed banks: India has the National Bureau of Plant Genetic Resources (NBPGR) in Delhi, with over 4 lakh seed accessions. Globally, the Svalbard Global Seed Vault (Norway) is the "Noah's Ark" for seeds.
• Gene banks: Store genetic material (DNA, gametes, embryos) of threatened species
• Captive breeding: Zoos operate captive breeding programmes; Central Zoo Authority oversees India's zoos
• Botanical and zoological gardens: Scientific collections; education; research; conservation breeding

PART 3 — Frameworks & Analysis

In-situ vs Ex-situ Conservation: Comparison

Biodiversity Threats and Conservation Responses

Exam Strategy

Prelims Traps:

• IUCN Red List categories in order: EX → EW → CR → EN → VU (the "threatened" categories) → NT → LC → DD → NE.
• Critically Endangered ≠ Extinct. Great Indian Bustard is CR (critically endangered), not extinct.
• In-situ = conservation in the natural habitat. Ex-situ = conservation outside natural habitat.
• Biosphere Reserve ≠ National Park: BR has three zones; NP has strict no-use policy in core; BR allows human activity in transition zone.
• Convention on Biological Diversity (CBD) = 1992, Rio. CITES = 1973, regulates international trade (not CBD).
• The Nagoya Protocol under CBD deals specifically with Access and Benefit Sharing (ABS) of genetic resources.

Mains Frameworks:

• Biodiversity loss question: HIPPO threats framework → ecosystem services at risk → India-specific data (tiger census, bustard decline) → conservation measures → international frameworks (CBD, GBF 30×30).
• Protected areas in India: 3-level system (NP, Sanctuary, BR) + community reserves → coverage statistics → challenges (encroachments, corridors).
• For "why is biodiversity loss a crisis" type questions: quantitative (species extinction rate 100–1,000× background) + qualitative (ecosystem services) + examples from India.

Previous Year Questions

1. UPSC Prelims 2022: The Kunming–Montreal Global Biodiversity Framework sets a target to protect what percentage of land and oceans by 2030? (30%)
2. UPSC Prelims 2019: The Great Indian Bustard is listed in which category of the IUCN Red List? (Critically Endangered)
3. UPSC Mains GS3 2021: What is the significance of in-situ and ex-situ conservation of biodiversity? Discuss with reference to India's conservation efforts.
4. UPSC Mains GS3 2023: Discuss the threats to biodiversity in India and the policy measures in place to address them.