Biodiversity
Biodiversity questions are mostly about India's own hotspots and protection categories. India has four biodiversity hotspots, and the exam expects you to name and place all four.
Mental model
Biodiversity questions are really about LEVEL and STATUS. Level: genetic (within a species), species (between species), ecosystem (between habitats). Status: the conservation ladder from Least Concern up through Vulnerable, Endangered, Critically Endangered, Extinct in the Wild, Extinct. Also split conservation into in-situ (park, sanctuary, biosphere reserve — protect the home) and ex-situ (zoo, botanical garden, gene bank — protect the individual). Level, status, in-situ or ex-situ: three questions and you have placed any item.
Associations
A short trigger on the left, everything it pulls with it on the right.
Four hotspots: Himalaya, Western Ghats, north-east, Nicobar.
The Himalaya hotspot, the Western Ghats and Sri Lanka hotspot, the Indo-Burma hotspot covering the north-east, and Sundaland covering the Nicobar Islands. Four names, four regions, and Gujarat is not one of them — a fact worth stating precisely because it is easy to assume otherwise.
Endemic, endangered, extinct — three different words.
Endemic means found only in one region, not necessarily rare. Endangered means at serious risk of extinction, as classified by the IUCN Red List. Extinct means gone entirely. A species can be endemic and common, or endangered without being endemic.
Things to remember
The night-before list. Short enough to recall cold.
- 1India has four recognised biodiversity hotspots: the Himalaya, the Western Ghats, Indo-Burma, and Sundaland (via the Nicobar Islands).
- 2The IUCN Red List categorises species from Least Concern through Vulnerable, Endangered and Critically Endangered to Extinct.
- 3The Wildlife Protection Act, 1972 created Schedules that grade species by the level of legal protection they receive.
- 4The Gir forest in Gujarat is the world's only wild habitat of the Asiatic lion, making it a globally significant biodiversity site outside the four hotspots.
- 5India is one of seventeen 'megadiverse' countries, a category based on very high overall species richness and endemism.
In detail
- The IUCN Red List classifies species by extinction risk; 'Critically Endangered' is the highest risk category for a species still surviving in the wild.
- India is one of the world's megadiverse countries and contains recognised global biodiversity hotspots including the Western Ghats and the Eastern Himalaya.
- The Asiatic lion survives in the wild only in Gujarat's Gir landscape — a textbook case of a species with a single wild population.
- The Biological Diversity Act, 2002 created the National Biodiversity Authority, State Biodiversity Boards and local Biodiversity Management Committees — a three-tier structure.
- An endemic species is found naturally in one region and nowhere else; endemism is what makes island and hotspot losses irreversible.
Where people slip
- Gujarat's ecosystems are significant but the state is not itself named as one of India's four biodiversity hotspots.
Check yourself
Nothing here is scored — it will not change your mastery figures.
Which of the following is NOT one of India's recognised biodiversity hotspots?
From the question bank
India is recognized as one of the world's mega-biodiversity countries. How many biodiversity hotspots (fully or partially) does India have?
From the question bank
Which term refers to species found only in a specific geographic region and nowhere else in the world?
Books to read
- NCERT Class XII — Biology
- Environment for Civil Services — Shankar IAS Academy
Official sources
Hand-checked official domains only — the notes above carry no links of their own.