Amogh N P
✦ In loving memory of Amogh N P — Architect · Designer · Visionary ✦
Misty shola forest of the Western Ghats — one of the world's biodiversity hotspots.
Unit III25ART203 · Environmental Studies in Architecture

Biodiversity & Its Conservation

The variety of life — why it matters, and how India guards it.

≈ 35 min + study task

Biodiversity is the variety of life — and India holds an extraordinary share of it. This unit covers the three levels of diversity, the services it quietly provides, India's place among the world's mega-diverse nations, the threats it faces, and the two great strategies for protecting it.

Learning objectives

By the end of this lesson, you will be able to — mapped to the course outcomes for Environmental Studies in Architecture:

1
CO3 · Understand

Define the genetic, species and ecosystem levels of biodiversity.

2
CO3 · Understand

List the ecological, economic and cultural services biodiversity provides.

3
CO3 · Analyse

Locate India's biodiversity hotspots and explain mega-diversity.

4
CO6 · Evaluate

Compare in-situ and ex-situ conservation and the threats they answer.

What diversity means

The three levels

Biodiversity runs at three levels — genetic (variation within a species), species (the range of species), and ecosystem (the variety of habitats). All three give nature its resilience, and us our food, medicine and clean water.[1, 5]

Three levels of biodiversity Genetic variation within a species Species many species in an area Ecosystem variety of habitats
DiagramThe three levels of biodiversity: genetic variation within a species, species diversity, and ecosystem diversity

Three levels of diversity

Genetic diversity (variation within a species), species diversity (the range of species in an area), and ecosystem diversity (the variety of habitats and communities). All three matter for resilience.[1, 5]

Hotspots

India — a mega-diverse nation

India is one of about 17 mega-diverse countries, and four of the world's biodiversity hotspots touch it: the Himalaya, the Western Ghats–Sri Lanka, Indo-Burma, and Sundaland (the Nicobar Islands). With this wealth comes the duty to guard it from habitat loss and poaching.[2, 4]

India's four biodiversity hotspots (schematic) Himalaya Indo-Burma Western Ghats Sundaland (Nicobar) Outline is diagrammatic, for teaching — not to scale or for boundary reference.
DiagramA schematic map of India marking its four biodiversity hotspots: Himalaya, Western Ghats, Indo-Burma and Sundaland (Nicobar)
A Bengal tiger in its habitat — an endangered flagship species of Indian conservation.
PhotoA Bengal tiger in its habitat — an endangered flagship species of Indian conservation.Shyamschaudhary · CC BY-SA 4.0 · via Wikimedia Commons
A protected wetland sanctuary alive with birds — in-situ conservation at work.
PhotoA protected wetland sanctuary alive with birds — in-situ conservation at work.Selvaganesh17 · CC BY-SA 4.0 · via Wikimedia Commons
How we protect it

In-situ & ex-situ conservation

Conservation works two ways: in-situ — protecting species in the wild through national parks, sanctuaries and biosphere reserves — and ex-situ — safeguarding them off-site in zoos, botanical gardens and seed or gene banks.[1, 3]

AspectIn-situEx-situ
WhereIn-situ: in the wild, on siteEx-situ: off site, in custody
Examplesnational parks, sanctuaries, biosphere reserveszoos, botanical gardens, seed/gene banks
Protectswhole habitats & natural processesindividual species & their genes
Best forlarge populations & ecosystemscritically endangered species, breeding
Indian exampleJim Corbett NP, Nilgiri BiosphereNational Gene Bank (NBPGR), zoos
Apply it

Study task

Pick one endangered Indian species. Note its habitat, the main threat to it, and one in-situ and one ex-situ measure that protects it. Which biodiversity hotspot does it belong to?

Check your understanding

Self-assessment

1. How many of the world's biodiversity hotspots lie (wholly or partly) in India?

2. Protecting a species inside a national park is an example of —

3. A species found only in one geographic area and nowhere else is called —

In a nutshell

Recap

Biodiversity has three levels: genetic, species and ecosystem.
It provides ecological, economic, social, ethical and aesthetic services we depend on.
India is a mega-diverse nation with four global hotspots — Himalaya, Western Ghats, Indo-Burma, Sundaland.
Conservation is in-situ (parks, sanctuaries) and ex-situ (zoos, botanical gardens, gene banks).
The evidence

References & further reading

  1. [1]Anubha Kaushik & C.P. Kaushik, Perspectives in Environmental Studies. New Age International.
  2. [2]Ministry of Environment, Forest and Climate Change (MoEFCC), Government of India — National Biodiversity reports. https://moef.gov.in/
  3. [3]Wildlife Institute of India — protected areas and conservation resources. https://wii.gov.in/
  4. [4]Conservation International / Critical Ecosystem Partnership Fund — Biodiversity Hotspots. https://www.cepf.net/our-work/biodiversity-hotspots
  5. [5]E.P. Odum, Fundamentals of Ecology.

Further reading

  • Erach Bharucha, Textbook of Environmental Studies (UGC) — strong on Indian biodiversity.
  • Anubha Kaushik & C.P. Kaushik, Perspectives in Environmental Studies.
  • Madhav Gadgil & Ramachandra Guha, This Fissured Land: An Ecological History of India.

Sources gathered and fact-checked June 2026. Published values vary by source, sample and method — treat as indicative and confirm against the cited standard before structural use.