Why this chapter matters for UPSC: Biodiversity is among the most heavily tested Environment topics in both Prelims and Mains. This chapter builds the taxonomic foundation — classification systems, binomial nomenclature, five kingdoms — and directly links to India's biodiversity status, the Biological Diversity Act 2002, the Kunming-Montreal Global Biodiversity Framework (2022), IPBES, and the 30×30 target. Questions on biodiversity hotspots, megadiverse countries, and international frameworks recur every 1–2 years.

PART 1 — Quick Reference Tables

Table 1: Five Kingdom Classification (R.H. Whittaker, 1969)

KingdomCell TypeNutritionExamplesUPSC Angle
MoneraProkaryote (no nucleus)Autotrophic/HeterotrophicBacteria, Blue-green algae (Cyanobacteria)Nitrogen fixation; biofertilisers
ProtistaUnicellular eukaryoteVariedAmoeba, Paramecium, EuglenaMalaria parasite (Plasmodium)
FungiEukaryote; no chlorophyllSaprophytic (decomposers)Mushroom, Penicillium, AspergillusAntibiotics (Penicillin); decomposition
PlantaeMulticellular eukaryoteAutotrophic (photosynthesis)Mosses, ferns, flowering plantsForest carbon sinks; agriculture
AnimaliaMulticellular eukaryoteHeterotrophicInsects, fish, amphibians, mammalsWildlife conservation; IUCN status

Table 2: India's Biodiversity — Key Statistics

ParameterDataSource/Note
Total plant species~45,000~7% of world's recorded flora
Total animal species~91,000~6.5% of world's fauna
Biodiversity Hotspots4Western Ghats, Eastern Himalayas, Indo-Burma, Sundaland (incl. Nicobar)
Megadiverse rank17th (out of 17 megadiverse nations)CBD definition; holds 60–70% of world's biodiversity
Protected Area network~5.02% of land area107 National Parks (April 2025), 573 Wildlife Sanctuaries, 97 Conservation Reserves
Wetlands (Ramsar Sites)99 Ramsar sites (3rd globally, after UK 176 and Mexico 144)As of April 2026
UNESCO Biosphere Reserves1813 in UNESCO's World Network (Cold Desert added Sep 2025)

Table 3: Taxonomic Hierarchy — Key Mnemonic

LevelExample (Tiger)Example (Rice)
DomainEukaryaEukarya
KingdomAnimaliaPlantae
PhylumChordataMagnoliophyta
ClassMammaliaLiliopsida
OrderCarnivoraPoales
FamilyFelidaePoaceae
GenusPantheraOryza
Speciestigrissativa

Mnemonic: Dear King Philip Came Over For Good Soup

PART 2 — Detailed Notes

1. The Need for Classification

Key Term

Taxonomy is the scientific discipline of naming, describing, and classifying organisms. With an estimated 8.7 million species on Earth (only ~1.5 million formally described), classification provides a universal language for biologists across countries and languages.

Binomial nomenclature (introduced by Carl Linnaeus, 18th century, "Father of Taxonomy"): Each organism gets a two-part Latin name — Genus species — written in italics. Examples:

  • Homo sapiens (modern humans)
  • Panthera tigris (Bengal tiger)
  • Oryza sativa (cultivated rice)
  • Mangifera indica (mango — India's national fruit)

2. Classification Systems

Five Kingdom System (R.H. Whittaker, 1969) — still used in NCERT and most UPSC contexts:

  • Divides life into Monera, Protista, Fungi, Plantae, Animalia
  • Key upgrade from older two-kingdom (Plant/Animal) system

Three Domain System (Carl Woese, 1990) — based on ribosomal RNA analysis:

  • Bacteria — common bacteria
  • Archaea — extremophiles; found in hot springs (Yellowstone, Ladakh hot springs), hypersaline lakes (Sambhar Lake), deep-sea vents; ancient lineage, possibly similar to early Earth life
  • Eukarya — all organisms with true nuclei (includes Protists, Fungi, Plants, Animals)
UPSC Connect

UPSC GS3 — Environment and Biodiversity: Archaea in extreme environments are relevant to astrobiology — the study of life's potential on other planets. ISRO's future missions (e.g., future Mars mission concepts) draw on understanding extremophile organisms to assess habitability. Also: hot springs in India (Manikaran, Parvati Valley; Tattapani, Himachal Pradesh) host thermophilic archaea studied by CSIR laboratories.

3. Fungi — Decomposers and Medicine

Fungi are neither plants nor animals — they absorb nutrients by secreting enzymes onto organic matter (saprophytic nutrition). Ecologically crucial as decomposers: they break down dead organic matter, recycling nutrients back to the soil.

Key Term

Penicillium notatum → produces Penicillin (Alexander Fleming, 1928 — serendipitous discovery). First antibiotic; saved millions of lives in World War II. Antibiotic resistance from overuse of penicillin-class drugs is now a global health crisis (AMR — Antimicrobial Resistance) — a recurring UPSC Mains theme.

4. India's Biodiversity — Hotspots and Significance

UPSC Connect

UPSC GS3 — Biodiversity Conservation: A biodiversity hotspot (Norman Myers, 1988) must meet two criteria:

  1. Contains at least 1,500 endemic vascular plant species (>0.5% of world total)
  2. Has lost at least 70% of its original habitat

India's four hotspots:

  • Western Ghats — 5,000+ plant species; 139 amphibian species; 508 bird species; home to Nilgiri tahr, lion-tailed macaque, Malabar giant squirrel
  • Eastern Himalayas — includes Sikkim, Arunachal Pradesh; red panda, snow leopard, Bengal florican; altitude gradient hosts exceptional diversity
  • Indo-Burma (NE India + Southeast Asia) — freshwater turtles, bats, primates; most of NE India's biodiversity
  • Sundaland (includes Nicobar Islands) — Nicobar megapode, Nicobar treeshrew; coral reef diversity

India is one of 17 megadiverse countries (CBD list) — together these 17 countries hold 60–70% of Earth's biodiversity on only ~10% of land area.

5. Biological Diversity Act, 2002

  • India's primary legislation implementing the Convention on Biological Diversity (CBD, 1992, Rio Earth Summit)
  • Establishes three-tier structure:
    • National Biodiversity Authority (NBA) — Chennai; apex body; regulates access to biological resources
    • State Biodiversity Boards (SBBs) — one per state
    • Biodiversity Management Committees (BMCs) — at Panchayat level; prepare People's Biodiversity Registers (PBRs)
  • Regulates Access and Benefit Sharing (ABS) — commercial users of biodiversity must share benefits with local communities (Nagoya Protocol, 2010)
  • 2023 Amendment to BDA 2002: broadened scope of ABS, facilitated R&D, addressed digital sequence information

6. International Frameworks

UPSC Connect

UPSC GS3 — International Conventions: Kunming-Montreal Global Biodiversity Framework (KMGBF), 2022:

  • Adopted at CBD COP15 (Kunming, China; Montreal, Canada — two-part meeting)
  • Headline target: 30×30 — protect at least 30% of land and 30% of oceans by 2030
  • Also: halt and reverse biodiversity loss by 2030; mobilise $200 billion/year in biodiversity finance
  • India's challenge: currently only ~5.02% of land is Protected Area; significant expansion needed to meet 30×30
  • Complements Paris Agreement (climate) — biodiversity and climate crises are deeply linked

IPBES (Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services):

  • Often called "IPCC for biodiversity"
  • Provides scientific assessments to policymakers; 2019 Global Assessment: 1 million species threatened with extinction
  • Not a UN body per se; established 2012 under UNEP umbrella

Ecosystem services valuation: Robert Costanza et al. estimated global ecosystem services at ~$125 trillion/year — far exceeding global GDP; highlights the economic case for conservation.

7. Threats to Biodiversity — HIPPO Framework

Explainer

HIPPO acronym for threats to biodiversity:

  • Habitat loss and degradation (largest driver — deforestation, agriculture expansion, urbanisation)
  • Invasive alien species (e.g., Lantana camara spreading in Indian forests; Water hyacinth choking wetlands; Prosopis juliflora in arid zones)
  • Pollution (pesticides, plastic, heavy metals, light pollution disrupting migratory birds)
  • Population (human population growth driving all other pressures)
  • Over-exploitation (poaching, illegal wildlife trade — 2nd largest illegal trade after drugs)

India's specific threats: 706 species listed as threatened in IUCN Red List as assessed for India; critically endangered include Great Indian Bustard, Bengal Florican, Gangetic River Dolphin (national aquatic animal).

[Additional] 2a. Biological Diversity Amendment Act 2023 — Reforms to India's Biodiversity Law

The chapter covers the Convention on Biological Diversity (CBD) as the international framework and India's biodiversity hotspots, but omits India's own domestic biodiversity law reform: the Biological Diversity (Amendment) Act 2023 — which fundamentally changed how India manages access to biological resources, protects traditional knowledge, and promotes the AYUSH sector. This is a direct UPSC GS3 topic.

Key Term

India's Biodiversity Law — Key Terms:

TermMeaning
Biological Diversity Act 2002India's primary law implementing the CBD — governs access to biological resources, benefit-sharing, and protection of traditional knowledge
National Biodiversity Authority (NBA)Statutory body under MoEFCC; headquartered in Chennai; grants approvals for access to biological resources by foreign entities and Indian companies
State Biodiversity Boards (SBBs)State-level bodies; manage Biodiversity Heritage Sites and regulate local access
Biodiversity Management Committees (BMCs)Village/local level; prepare People's Biodiversity Registers (PBRs) documenting local biodiversity and traditional knowledge
Access and Benefit Sharing (ABS)When a company uses India's biological resources (e.g., a medicinal plant) for commercial product, it must share profits with the local community/nation — principle from CBD's Nagoya Protocol
Nagoya Protocol 2010International agreement under CBD; operationalises ABS; India ratified in 2012

What the Biological Diversity (Amendment) Act 2023 changed:

The 2002 Act had several provisions that industry, AYUSH sector, and domestic researchers found burdensome. The 2023 amendment (Act No. 10 of 2023) made five major changes:

  1. Decriminalisation: Imprisonment for offences under Section 55 removed; only monetary penalties retained (fines increased 5–10×)
  2. Indian companies exempted: Indian-registered companies that are not "foreign-controlled" no longer need NBA prior approval — only registration before IPR grant
  3. AYUSH exemption: Practitioners using "codified traditional knowledge" and cultivated (not wild-harvested) medicinal plants exempt from benefit-sharing obligations
  4. Wild medicinal plants protected: The exemption only applies to cultivated plants — wild collection still requires ABS compliance, incentivising cultivation
  5. Faster research pipeline: Bio-survey/bio-utilisation for research, teaching, and bio-medical research by Indian nationals decriminalised and streamlined
UPSC Connect

[Additional] Biological Diversity Amendment Act 2023 — Context and Controversy (GS3 — Environment / Biodiversity Governance):

Legislative history:

  • Biological Diversity Bill 2021 → Introduced in Lok Sabha; referred to Joint Parliamentary Committee (JPC)
  • JPC report submitted 2022; recommended 45 amendments
  • Biological Diversity (Amendment) Bill 2023 passed: Rajya Sabha July 21, 2023; Lok Sabha July 25, 2023; Gazette notification August 5, 2023 (Act No. 10 of 2023)
  • Nodal Ministry: Ministry of Environment, Forest and Climate Change (MoEFCC)

Key policy rationale:

  • India's bioeconomy reached $130 billion in 2024 (from $10 billion in 2014); target $300 billion by 2030 — the BioE3 Policy (Cabinet August 24, 2024) accelerates this
  • The 2023 amendment removes regulatory friction for domestic companies working with biological resources in the pharmaceutical, agri-biotech, and AYUSH sectors
  • AYUSH sector has India's traditional medicinal knowledge at its core — exempting codified traditional knowledge from ABS requirements reduces costs for Indian systems of medicine while protecting that knowledge from foreign bioprospecting

Concerns raised by environmentalists:

  • Weakening of ABS provisions may reduce benefit-sharing with local communities (adivasi communities, forest dwellers) who are traditional custodians of biodiversity knowledge
  • Defining "foreign-controlled" companies is complex — shell company structures could be used to circumvent requirements
  • Reduced criminalisation weakens deterrence against biopiracy

India's 7th National Report to CBD (submitted January 2026):

  • Of 23 national biodiversity targets aligned with the Kunming-Montreal Global Biodiversity Framework (KMGBF), India notes only 2 are fully on track
  • India's forest and tree cover = 25.17% of geographic area (ISFR 2023 plus updated forest assessment)
  • India has restored 24.1 million hectares against its Bonn Challenge pledge of 26 million hectares — on track

KMGBF (Kunming-Montreal Global Biodiversity Framework) — 30×30 target:

  • Adopted at CBD COP15, Kunming-Montreal, December 2022
  • Key target: Protect 30% of Earth's land and oceans by 2030 ("30×30" target)
  • India's current Protected Area coverage: ~5.32% of geographic area (1,015 PAs — 107 National Parks, 573 Wildlife Sanctuaries, 115 Conservation Reserves, 220 Community Reserves as of March 2025)
  • India's territorial + exclusive economic zone = ~5.32% terrestrial; marine PA % is even lower
  • Reaching 30% coverage by 2030 requires major expansion — India is significantly short of the KMGBF target

UPSC synthesis: The Biological Diversity Amendment Act 2023 is a direct UPSC GS3 topic — it connects biodiversity governance (CBD, NBA, ABS, Nagoya Protocol) with India's bioeconomy growth ($130B in 2024, target $300B by 2030) and AYUSH sector promotion. The debate between ease-of-business vs conservation integrity is a standard Mains angle. Key exam facts: Act No. 10 of 2023; passed August 2023; 5 key changes (decriminalisation, Indian company exemption, AYUSH exemption, wild plant protection, research streamlining); NBA = Chennai; India's 7th National Report to CBD January 2026; KMGBF 30×30 target vs India's current ~5.32% PA coverage. Always distinguish: CBD = international convention (1992); Biological Diversity Act 2002 = India's domestic law; Nagoya Protocol 2010 = ABS operationalisation.

[Additional] 2b. Project Cheetah — Bringing Back an Extinct Species

The chapter covers IUCN Red List categories and threats to biodiversity but provides no example of active species reintroduction — arguably the most dramatic applied-conservation story in contemporary India. Project Cheetah is the world's only inter-continental large-carnivore translocation programme and directly illustrates concepts the chapter teaches: extinction, conservation status, in-situ conservation, and recovery efforts.

Key Term

Key Terms — Species Reintroduction:

TermMeaning
Local extinctionA species disappears from a specific region but still exists elsewhere (e.g., cheetah extinct in India since 1952 but surviving in Africa)
TranslocationMoving individual animals from one location to another to establish or reinforce a population
Soft release / soft bomaA large fenced enclosure (several hectares) where translocated animals are kept before release into the wild — allows gradual acclimatisation
MetapopulationA group of spatially separated populations of the same species linked by occasional migration — conservation strategy to prevent single-site extinction
Cheetah Action PlanIndia's official government document (MoEFCC) laying out the phased reintroduction strategy for cheetahs at multiple sites across India

Why the cheetah went extinct in India (1952): The last confirmed sighting of wild cheetah in India: 1947 (Surguja district, Chhattisgarh); declared extinct by 1952. Causes: hunting by royalty and farmers; habitat loss; loss of prey base (blackbuck, chinkara). The Asiatic cheetah subspecies (Acinonyx jubatus venaticus) survives only in Iran (~10–12 individuals) — critically endangered. India is using the African cheetah (Acinonyx jubatus jubatus) for reintroduction as a functionally equivalent ecological substitute.

UPSC Connect

[Additional] Project Cheetah — India's Reintroduction Programme (GS3 — Biodiversity / Environment):

Timeline of translocations:

DateSourceNumbersLocation
September 17, 2022Namibia8 (5 female, 3 male)Kuno National Park, Madhya Pradesh
February 18, 2023South Africa12 (7 female, 5 male)Kuno National Park, Madhya Pradesh
February 2026Botswana9 (6 female, 3 male)Kuno National Park + Gandhi Sagar WLS

Population status (May 2026):

  • Total cheetahs in India: 57 (54 at Kuno National Park + 3 at Gandhi Sagar Wildlife Sanctuary, Madhya Pradesh)
  • Of 54 at Kuno: 17 free-ranging in the wild + 37 in soft bomas (large conditioning enclosures)
  • 33 cheetahs born in India — the first natural cheetah births in India in over 70 years
  • Total deaths since September 2022: ~12 (disease, injuries, territorial fights) — a natural attrition rate monitored by MoEFCC

Expansion — beyond Kuno:

  • Gandhi Sagar Wildlife Sanctuary (Mandsaur district, Madhya Pradesh): Second site; 3 cheetahs relocated from Kuno in 2025-26 to reduce crowding pressure
  • Proposed Kuno–Gandhi Sagar corridor: A ~17,000 sq km inter-state wildlife corridor under planning — would allow natural cheetah dispersal between sites
  • Long-term Cheetah Action Plan target: Stable population of 100–200 cheetahs across 3–5 sites including Mukundra Hills (Rajasthan), Banni Grasslands (Gujarat), and Nauradehi WLS (Madhya Pradesh)

Scientific and governance aspects:

  • India Supreme Court (January 2023): SC bench transferred oversight from NTCA (National Tiger Conservation Authority) to Project Steering Committee under chairmanship of Principal Chief Conservator of Forests (PCCF) of Madhya Pradesh
  • Coalition for Cheetahs in India (CCI) — Namibia Cheetah Conservation Fund and Wildlife Institute of India collaboration
  • WII (Wildlife Institute of India, Dehradun) is the nodal research institution; conducts collar-monitoring, health assessment, prey-base studies
  • Each cheetah carries a satellite collar (GPS + VHF) for 24×7 tracking; veterinary team on-site at Kuno

UPSC synthesis: Project Cheetah illustrates every biodiversity concept this chapter teaches: IUCN category (locally extinct → reintroduced); in-situ conservation (Kuno NP as protected habitat); habitat management (prey-base restoration); international cooperation (India-Namibia-South Africa-Botswana); governance (MoEFCC → WII → Madhya Pradesh Forest Dept). The 57-cheetah population and 33 India-born cheetahs (May 2026) is the current status. Key exam facts: cheetah extinct in India 1952; Project Cheetah started September 17, 2022 (PM Modi personally released 8 Namibian cheetahs); Kuno National Park = Sheopur district, Madhya Pradesh; 57 total (May 2026); 33 born in India; African subspecies (A. j. jubatus) used, not Asiatic (A. j. venaticus); WII = nodal research body; long-term target 100-200 cheetahs at 3-5 sites.

Exam Strategy

Prelims traps:

  • Five kingdoms: Monera is prokaryote; all others are eukaryotes — the single most tested fact
  • Fungi are NOT plants — they lack chlorophyll and cannot photosynthesise
  • Whittaker (Five Kingdom, 1969) vs. Woese (Three Domain, 1990) — know both and the distinguishing feature (rRNA analysis)
  • India has 4 biodiversity hotspots, NOT 3 or 5 — a frequent error
  • NBA (National Biodiversity Authority) is headquartered in Chennai, not Delhi or Bengaluru
  • Kunming-Montreal: 30×30 target is for 2030, not 2050 (2050 is the vision goal)
  • Ramsar Sites: India has 89 — most in world (as of 2024); do not confuse with UNESCO World Heritage Sites

Mains angles:

  • "India is rich in biodiversity but poor in its conservation outcomes. Critically examine."
  • "Discuss the Access and Benefit Sharing mechanism under the Biological Diversity Act and its significance for local communities."
  • "Examine the 30×30 target of the Kunming-Montreal Global Biodiversity Framework. How feasible is this target for India?"

Practice Questions

Prelims:

  1. Which of the following is correctly matched?
    (a) Five Kingdom Classification — Carl Woese
    (b) Binomial Nomenclature — Carl Linnaeus
    (c) Three Domain System — R.H. Whittaker
    (d) Hotspot Concept — E.O. Wilson

  2. Consider the following statements about India's biodiversity hotspots:

    1. India has four biodiversity hotspots.
    2. The Western Ghats is one of India's biodiversity hotspots.
    3. A hotspot must have lost at least 50% of its original habitat.
      Which of the statements given above is/are correct?
      (a) 1 and 3 only
      (b) 1 and 2 only
      (c) 2 and 3 only
      (d) 1, 2, and 3

Mains:

  1. The Kunming-Montreal Global Biodiversity Framework sets an ambitious 30×30 target. Analyse the implications of this target for India's protected area network and suggest measures to bridge the gap. (CSE Mains 2023, GS Paper 3, 15 marks)
  2. Fungi are neither plants nor animals, yet they are essential to all ecosystems. Elaborate on the ecological and economic significance of fungi with reference to India. (CSE Mains 2022, GS Paper 3, 10 marks)