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Every NCERT book that matters for UPSC — open a book, then a chapter. Learn each chapter's concepts, then how UPSC tests them — with diagrams, flowcharts and the past questions to attempt.
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← India: Physical Environment — all chaptersNatural Vegetation
Start here: why this chapter matters
In simple wordsA city park and a jungle can have the same trees, but one is planted and trimmed by people and the other grew by itself. Natural vegetation is the second kind: plants that have grown undisturbed for a long time and fit their climate and soil. Read this chapter as a map of which plants nature puts where in India, and why — and what we are doing to protect them.
NCERT defines natural vegetation as a plant community left undisturbed over a long time, so its species adjust as fully as possible to climate and soil. India's variety is huge: temperate forests on the Himalayan heights, tropical rain forests in the Western Ghats and the Andaman & Nicobar Islands, mangroves in the deltas, cacti and thorny bushes in Rajasthan.
- Builds on Chapter 4: rainfall and temperature decide the forest type; on Chapter 2: relief and altitude decide the montane zones.
- Leads into Chapter 6: deforestation worsens floods, landslides and soil erosion; mangroves protect coasts from cyclones and tsunamis.
- Physical Geography link: Chapter 14 (Biodiversity and Conservation) explains hotspots, IUCN categories and conservation; this chapter gives India's forest types and conservation programmes.
- UPSC: Prelims ask forest types, typical trees, biosphere reserves, wetlands and Ramsar sites, and wildlife law; GS1 Mains asks about vegetation diversity, mangroves and forest resources; GS3 about wetlands and conservation.
| Word | What it means here |
|---|---|
| Natural vegetation | Plants that grew undisturbed and adjusted to climate and soil |
| Evergreen / deciduous | Keeps leaves all year / sheds leaves in the dry season |
| Stratified | Arranged in layers: shrubs, short trees, tall trees |
| Montane | Of mountains — changing with altitude |
| Littoral / mangrove | Of the coast / salt-tolerant trees of tidal mud flats |
| Shola | Temperate forest patches of the Nilgiri, Anaimalai and Palani hills |
| Transhumance | Seasonal movement of herders and herds between low and high pastures |
| Social forestry | Raising and protecting trees for environmental, social and rural development |
| Biosphere reserve | A representative ecosystem recognised under UNESCO's Man and Biosphere programme |
At a glance — the six ideas to carry away
- Five forest groups: evergreen · deciduous · thorn · montane · littoral and swamp.
- Evergreen: over 200 cm rain, above 22°C; deciduous 70–200 cm (most widespread); thorn below 50 cm.
- Himalaya: deciduous foothills → wet temperate (1,000–2,000 m) → blue pine/spruce → alpine (3,000–4,000 m) → tundra.
- Mangroves: 4,992 sq km — Andaman & Nicobar and the Sunderbans; wetlands grouped into eight types.
- Forest Policy 1952 → 1988: aim 33% forest cover; social forestry = urban + rural (agro, community) + farm.
- Wildlife Act 1972; 107 national parks, 573 sanctuaries; Project Tiger 1973; 18 biosphere reserves, 12 in UNESCO's network.
1. Types of forests and the rainfall behind them
In simple wordsGive a plant more water and warmth and it grows taller and greener; give it less and it gets smaller, tougher and spiny. Walk from the wettest to the driest part of India and the forest changes the same way: tall evergreen → leaf-shedding monsoon forest → thorny scrub.
By the dominant vegetation and climate, NCERT groups India's forests into five: (i) tropical evergreen and semi-evergreen, (ii) tropical deciduous, (iii) tropical thorn, (iv) montane, (v) littoral and swamp.
Reading NCERT Figure 5.2 — Natural Vegetation (page 43)
- Five shades: littoral and swamp, montane, tropical thorn, tropical deciduous, and tropical evergreen and semi-evergreen.
- Evergreen: a narrow strip along the Western Ghats to the southern tip, a short strip near the south-east coast of Tamil Nadu, most of the north-east, and the island groups.
- Deciduous fills most of the country — central India, the plateau, the Ganga plain and the east.
- Thorn covers Rajasthan, Gujarat, south-west Punjab–Haryana, and — something the text doesn't mention — a separate tongue in the interior Deccan (the rain shadow of the Western Ghats). UPSC 2002 tested exactly this: stunted thorny forests in western Andhra Pradesh.
- Montane covers the Himalaya (Jammu & Kashmir–Ladakh, Himachal, Uttarakhand, Sikkim, northern Arunachal).
- Littoral and swamp forests appear as small dark patches at the Ganga–Brahmaputra delta (Sunderbans) and the Mahanadi, Godavari and Krishna deltas.
2. Tropical evergreen and semi-evergreen forests
In simple wordsA tropical rain forest is like a tall apartment block: creepers and shrubs on the ground floor, smaller trees in the middle floors, giants reaching 60 m on the roof. With warmth and water all year, trees don't all drop leaves at once, so the forest never looks bare.
- Where: the western slope of the Western Ghats, the hills of the north-east, and the Andaman & Nicobar Islands.
- Climate: rainfall over 200 cm, mean annual temperature above 22°C.
- Structure: well stratified; trees up to 60 m or more; no fixed season of leaf fall, flowering or fruiting — green all year.
- Species: rosewood, mahogany, aini, ebony.
- Semi-evergreen (less rainy parts): a mix of evergreen and moist deciduous trees; climbers keep them green; white cedar, hollock, kail.
Reading NCERT Figure 5.1 — Evergreen Forest (page 42)A dense, unbroken wall of tall trees with a continuous, uneven canopy rising above water in the foreground — no gaps and no bare branches, the ‘green all year’ look of the evergreen forest.
Exam traps
- Mahogany is an evergreen tropical tree — not a Himalayan species (UPSC 2008).
- Tropical wet evergreen forests occur in Arunachal Pradesh and Mizoram, not Himachal Pradesh (UPSC 2015).
- The Andaman & Nicobar Islands combine mangrove, evergreen and deciduous forests (UPSC 2015).
The colonial impact (page 44)NCERT notes that the British exploited India's forests commercially: oak forests of Garhwal and Kumaon were replaced by chir pine (needed for railway lines), forests were cleared for tea, rubber and coffee, and timber was used in construction. The protective use of forests gave way to commercial use.
3. Tropical deciduous and thorn forests
In simple wordsThink of a tree in a place with a long dry season as a person saving water: it drops its leaves so less water evaporates. That is why monsoon forests go bare in the dry months — and why trees in the driest areas have tiny leaves or thorns.
| Moist deciduous | Dry deciduous | Tropical thorn | |
|---|---|---|---|
| Rainfall | 100–200 cm | 70–100 cm | below 50 cm |
| Where | North-eastern states along the Himalayan foothills, eastern slopes of the Western Ghats, Odisha | Rainier parts of the Peninsula; plains of UP and Bihar | Semi-arid SW Punjab, Haryana, Rajasthan, Gujarat, MP, UP |
| Look | Tall forest, leafless for part of the year | Parkland: open stretches, trees among grass; bare in the dry season | Scrub; leafless most of the year; tussocky grass up to 2 m |
| Trees | Teak, sal, shisham, hurra, mahua, amla, semul, kusum, sandalwood | Tendu, palas, amaltas, bel, khair, axlewood | Babool, ber, wild date palm, khair, neem, khejri, palas |
Deciduous forests are the most widespread in India and are called monsoon forests (70–200 cm). On wetter margins dry deciduous grades into moist deciduous, on drier margins into thorn forest. In western and southern Rajasthan, low rain and overgrazing leave very scanty cover.
Reading NCERT Figures 5.3 and 5.4 — Deciduous and Thorn Forests (page 44)
- Figure 5.3: straight, tall, well-spaced trunks with light, open crowns and light reaching the ground — a monsoon forest, less crowded than an evergreen forest.
- Figure 5.4: low, tangled, spiny bushes and scattered small trees across a flat, open landscape with a wide pale sky — the scrub look of thorn forests.
⤵ From less water to tougher plants
Long dry seasonwater is scarce for months
Trees shed leavescuts water loss by transpiration (UPSC 1983)
Even less rain (below 50 cm)tiny leaves, thorns, long roots
Scrub and thorn forestbabool, ber, khejri
Exam traps
- Sandalwood is listed by NCERT under moist deciduous forests (exercise Q1-i) — not evergreen.
- Teak is the dominant tree of tropical moist deciduous forests (UPSC 2015); the forest type covering the largest area is tropical moist deciduous in the 2010 options.
- Jackfruit is evergreen; mahua and teak are deciduous (UPSC 2023).
4. Montane forests
In simple wordsClimbing a high mountain is like travelling from the equator to the poles in one day: temperature falls as you go up, so the plants change from tropical to temperate to alpine to tundra.
- Foothills: deciduous forests.
- 1,000–2,000 m: wet temperate forests; evergreen broad-leaved oak and chestnut in the north-east, hilly West Bengal and Uttarakhand (NCERT still writes ‘Uttaranchal’); chir pine at 1,500–1,750 m; deodar, a valued endemic, mainly in the western Himalaya; chinar and walnut, which sustain Kashmir's handicrafts.
- 2,225–3,048 m: blue pine and spruce; temperate grasslands in places.
- 3,000–4,000 m: alpine forests and pastures — silver fir, juniper, pine, birch, rhododendron; used for transhumance by the Gujjars, Bakarwals, Bhotiyas and Gaddis.
- Higher still: mosses and lichens (tundra). South-facing slopes carry denser forest than drier north-facing ones.
Southern mountain forests grow in the Western Ghats, the Vindhyas and the Nilgiris: temperate in the higher parts, subtropical lower down, especially in Kerala, Tamil Nadu and Karnataka. The temperate forests of the Nilgiri, Anaimalai and Palani hills are called sholas; useful trees include magnolia, laurel, cinchona and wattle. Similar forests occur in the Satpura and Maikal ranges.
Reading NCERT Figure 5.5 — Montane Forests (page 45)A hillside densely covered with tall, narrow, cone-shaped conifers (pines), with a slope of bare ground and a path on the left — the needle-leaved forest of the middle Himalaya.
NCERT check — ‘only 1,500 m above sea level’NCERT says the southern mountains are ‘only 1,500 m above sea level’. That is about the average height of the Western Ghats; Chapter 2 itself gives Anaimudi 2,695 m and Dodabetta 2,637 m. The sholas grow on these higher tops.
Beyond NCERT (asked by UPSC)
- Alpine vegetation reaches higher in the eastern Himalaya than in the western (UPSC 1995) — the east is nearer the tropics and warmer and wetter at the same height.
- Khangchendzonga National Park spans tropical to arctic climates in a short distance (UPSC 2015); the Valley of Flowers lies wholly in the temperate alpine zone (UPSC 2019); oak and rhododendron, not sandalwood, grow naturally in the Himalaya (UPSC 2014).
5. Littoral and swamp forests: wetlands and mangroves
In simple wordsWetlands are the land's sponges and kidneys: they soak up floods, filter water and shelter birds and fish. Mangroves are the coast's living sea-wall — trees that survive in salty, muddy water twice a day and break the force of waves.
India has a rich variety of wetlands. NCERT says about 70% of them are under paddy, the total wetland area is 3.9 million ha, and two sites — Chilika Lake (Odisha) and Keoladeo National Park (Bharatpur) — are protected as water-fowl habitats under the Ramsar Convention. (A box adds that an international convention is an agreement among UN member states.)
- Mangroves grow in salt marshes, tidal creeks, mud flats and estuaries; they are salt-tolerant and shelter many birds.
- 4,992 sq km in India; best developed in the Andaman & Nicobar Islands and the Sunderbans; also the Mahanadi, Godavari and Krishna deltas. They are being encroached on and need conservation.
Reading NCERT Figure 5.6 — Mangrove Forests (page 46)Dense, low, bushy salt-tolerant vegetation with a thick fringe of upright, spiky growth in the foreground — the crowded, waterlogged look of a mangrove swamp at the water's edge.
NCERT checks — outdated wetland and mangrove figures
- Ramsar sites: NCERT names only two. India has added many since; the total passed 80 in early 2024 (Ministry of Environment announcements) and keeps growing — check the current count before quoting a number.
- Wetland area: ISRO's National Wetland Atlas (2011) mapped about 15 million ha (≈ 4.6% of the country) — far more than NCERT's 3.9 million ha.
- Mangrove share: NCERT says 4,992 sq km is ‘7 per cent of the world's mangroves’. The Forest Survey of India's reports give about 7% for all of South Asia, of which India has a little under half — so India's share is about 3%. The area (4,992 sq km) matches FSI's 2021 assessment.
Beyond NCERT (asked by UPSC)
- The Ramsar Convention asks for the ‘wise use’ of wetlands — conservation together with sustainable use, not closing them off (UPSC 2010; Mains 2018). Joining Ramsar does not oblige India to protect every wetland in the country (UPSC 2019).
- Gujarat has the largest wetland area; India's inland wetlands exceed its coastal ones (UPSC 2012). The largest inland saline wetland is in Rajasthan (Sambhar) — NCERT's category (ii) (UPSC 2009).
- The Sundari tree gives the Sunderbans their name (UPSC 1997). Mangroves stabilise shorelines and act as a bulwark against the sea (UPSC 1996 A–R; 2026).
6. Forest conservation and social forestry
In simple wordsForests are a bank account: you can live on the interest (fruit, fodder, some timber) for ever, but if you spend the capital (clear-felling), it runs out. Forest policy tries to keep the capital and grow it, while still meeting people's needs.
India adopted a forest policy in 1952, modified in 1988, emphasising sustainable forest management — conserving and expanding forests while meeting local needs. Its aims: (i) 33% of geographical area under forest; (ii) environmental stability and restoration; (iii) conserving natural heritage, biodiversity and the genetic pool; (iv) checking soil erosion, desert spread, floods and droughts; (v) more forest cover through social forestry and afforestation of degraded land; (vi) more productive forests for timber, fuel, fodder and food, and wood substitutes; (vii) a mass people's movement, involving women, to plant trees and stop felling.
Reading the ‘Forests and Life’ box (page 46)For many tribal people the forest is home, livelihood and existence — food, fruit, leaves, honey, roots, game, and materials for houses and art. Tribal knowledge of forestry should be used: rather than treating tribals as collectors of minor forest produce, they should be made growers of it and partners in conservation.
Beyond NCERT — forest area vs forest cover (exercise Q2-iv)
- Forest area (recorded forest) is land legally recorded as forest in government records, whether or not trees stand on it.
- Forest cover is land actually under trees, measured by satellite: all land over 1 hectare with tree canopy density above 10%, whatever its ownership.
- The Forest Survey of India (headquarters Dehradun) publishes the India State of Forest Report every two years; the 2021 report put forest cover at about 21.7% of India's area (about 24.6% with tree cover) — still short of the 33% goal. The 1988 policy also sets two-thirds cover in the hills.
Exam trapThe target is 33% of the geographical area (exercise Q1-v; UPSC 1999), not one-fifth — about one-fifth is the actual forest cover (UPSC 1992, 2005).
7. Wildlife and its conservation
In simple wordsAnimals need a home before they need protection. Most wildlife loss in India is not from hunting alone but from losing the home — forests cleared for fields, roads, mines and dams. Conservation therefore protects areas, not just animals.
NCERT says about 4–5% of all known plant and animal species are found in India, thanks to its great diversity of ecosystems. (Beyond NCERT: the Ministry of Environment usually quotes 7–8% of recorded species — use that figure with its source, or NCERT's with ‘as per NCERT’.)
⤵ Why wildlife declined (NCERT's six reasons)
Industry and technologyfaster exploitation of forests
Land clearedagriculture, settlements, roads, mining, reservoirs
Local pressurelopping for fodder and fuelwood, small timber
Grazing by domestic cattlehabitat damage
Hunting, then commercial poachingand forest fires
- Wildlife (Protection) Act, 1972: protects endangered species listed in its schedules and gives legal backing to national parks, sanctuaries and closed areas; amended in 1991 with stricter punishments and protection for specified plants.
- 107 national parks and 573 wildlife sanctuaries (NCERT's figures).
- Project Tiger (1973), Project Elephant (1992), a Crocodile Breeding Project, Project Hangul and conservation of the Himalayan musk deer.
Reading NCERT Figure 5.7 — Elephants in their Natural Habitat (page 48)A herd of elephants, including young ones, at a waterhole on open grassland with forest behind — Project Elephant's aim of keeping viable populations in their natural habitat, with the corridors between forest and water they need.
Beyond NCERT
- The Wildlife Act has been amended several times since 1991 — notably in 2006, creating the National Tiger Conservation Authority, and in 2022. Species in Schedule I get the highest protection (UPSC 2017).
- Local people may not collect biomass in national parks; sanctuaries allow limited biotic interference; a national park's boundaries are fixed by legislation (UPSC 2010, 2012). National-park and sanctuary counts change often — NCERT's 107 and 573 are older figures.
- Project Tiger began with Jim Corbett among the first nine reserves, and UPSC 1991 called it the most successful wildlife scheme.
8. Biosphere reserves
In simple wordsA national park is like a museum: look, don't touch. A biosphere reserve is more like a living village around a protected heart — nature is protected in the core, people live and work sustainably around it, and scientists study and compare it with reserves worldwide.
A biosphere reserve is a unique and representative ecosystem of terrestrial and coastal areas, internationally recognised under UNESCO's Man and Biosphere (MAB) programme. It has three objectives (Figure 5.9). India has 18 biosphere reserves, of which 12 are in UNESCO's World Network.
Reading NCERT Figure 5.9 — Objectives of a Biosphere Reserve (page 50)Two inputs feed the reserve from above — Conservation (of biodiversity and ecosystems) and Development (associating environment with development) — and Logistics supports it from below as an international network for research and monitoring.
Reading NCERT Table 5.1 and Figure 5.8 — Biosphere Reserves (pages 48–49)
- Table 5.1 lists 18 reserves from Nilgiri (1986, Tamil Nadu–Kerala–Karnataka) to Panna (2011, MP). The bold ones — Nilgiri, Nanda Devi, Nokrek, Sunderban, Gulf of Mannar, Great Nicobar, Similipal, Pachmarhi, Khangchendzonga, Agasthyamalai, Achanakmar-Amarkantak, Panna — are the 12 in UNESCO's network. The source is the Ministry's Annual Report 2024–25.
- Multi-state reserves: Nilgiri (TN, Kerala, Karnataka), Agasthyamalai (TN, Kerala), Achanakmar-Amarkantak (MP, Chhattisgarh). Two in Assam (Manas, Dibru-Saikhowa) and three in MP (Pachmarhi, Achanakmar-Amarkantak, Panna).
- Figure 5.8 marks the reserves on a map — but shows only 14: Kachchh, Cold Desert, Seshachalam and Panna are missing from it. Use the table for the full list.
Exam traps
- ‘Gulf of Kachchh’ is not a biosphere reserve (UPSC 1995) — the Kachchh reserve (2008) is in the Rann; the Gulf of Mannar is one. Nallamalai is not a biosphere reserve (UPSC 2005); Seshachalam is the Andhra one.
- A biosphere reserve conserves whole ecosystems, not a few chosen species (UPSC 2010).
- Nokrek is in the Garo hills (UPSC 2013); Dehang-Debang in Arunachal, Similipal in Odisha, Khangchendzonga in Sikkim (UPSC 2004). UPSC 2008 asked which reserves were then in UNESCO's network — the count has grown since, to 12 in NCERT's table.
NCERT exercise — answer outlines
Try each question yourself first, then open the outline to compare.
1(i) Sandalwood is an example of: (a) Evergreen forest (b) Deciduous forest (c) Deltaic forest (d) Thorny forest
(b) Deciduous forest — NCERT lists it among moist deciduous species.
1(ii) Which one of the following was the purpose of Project Tiger? (a) to kill tigers (b) to put tigers in the zoo (c) to protect tigers from illegal hunting (d) to make films on tigers
(c) — more fully, to maintain viable tiger populations and preserve areas of biological importance.
1(iii) In which state is the Nanda Devi Biosphere Reserve? (a) Bihar (b) Uttar Pradesh (c) Uttarakhand (d) Odisha
(c) Uttarakhand (designated 1988).
1(iv) How many of India's biosphere reserves are recognised by UNESCO? (a) One (b) Two (c) Twelve (d) Four
(c) Twelve (as per NCERT's table).
1(v) What proportion of the country was targeted to be under forest in the Forest Policy? (a) 33 (b) 44 (c) 55 (d) 22
(a) 33%.
2(i) What is natural vegetation? Under what climatic conditions do tropical evergreen forests develop? (30 words)
A plant community left undisturbed long enough to adjust fully to climate and soil. Evergreen forests need over 200 cm of rain and a mean annual temperature above 22°C — warm and humid all year.
2(ii) What do you understand by social forestry? (30 words)
Management, protection and afforestation of barren land for environmental, social and rural development — classed (1976) as urban, rural (agro- and community) and farm forestry.
2(iii) Define biosphere reserves. (30 words)
Unique, representative terrestrial and coastal ecosystems recognised under UNESCO's Man and Biosphere programme, aiming at conservation, development and logistics (research and monitoring). India has 18; 12 are in UNESCO's network.
2(iv) What is the difference between forest area and forest cover? (30 words)
Forest area is land recorded as forest in government records; forest cover is land actually under tree canopy (over 1 ha, density above 10%), measured by satellite, regardless of ownership (Beyond NCERT; Forest Survey of India).
3(i) What steps have been taken to conserve forests? (150 words)
Policy: Forest Policy 1952, revised 1988 — 33% target, sustainable management, local needs.
Afforestation: social forestry (urban, agro, community, farm), free seedlings, wastelands.
Protected areas and law: Wildlife Act 1972 (amended 1991), national parks and sanctuaries, Project Tiger, Project Elephant, biosphere reserves under UNESCO's MAB.
Wetlands and mangroves: Ramsar sites such as Chilika and Keoladeo; mangrove conservation in the Sunderbans and deltas.
People: a mass movement with women's participation; tribals as growers of forest produce.
Monitoring (Beyond NCERT): Forest Survey of India's biennial reports.
Conclude: cover still short of 33% — participation and enforcement matter most.
Afforestation: social forestry (urban, agro, community, farm), free seedlings, wastelands.
Protected areas and law: Wildlife Act 1972 (amended 1991), national parks and sanctuaries, Project Tiger, Project Elephant, biosphere reserves under UNESCO's MAB.
Wetlands and mangroves: Ramsar sites such as Chilika and Keoladeo; mangrove conservation in the Sunderbans and deltas.
People: a mass movement with women's participation; tribals as growers of forest produce.
Monitoring (Beyond NCERT): Forest Survey of India's biennial reports.
Conclude: cover still short of 33% — participation and enforcement matter most.
3(ii) How can people's participation be effective in conserving forests and wildlife? (150 words)
Why: communities live in and depend on forests; enforcement alone fails without them.
How: community and farm forestry; making tribals growers, not just collectors, of minor forest produce; women in tree-planting and anti-felling movements (NCERT's people's movement); sharing benefits with the landless through community forestry; local monitoring against fires, poaching and grazing; eco-tourism income for villages.
Examples (Beyond NCERT): the Chipko movement in the Garhwal Himalaya, Joint Forest Management committees, the Bishnoi tradition in Rajasthan, sacred groves.
Conclude: conservation with people, not against them — the idea behind biosphere reserves.
How: community and farm forestry; making tribals growers, not just collectors, of minor forest produce; women in tree-planting and anti-felling movements (NCERT's people's movement); sharing benefits with the landless through community forestry; local monitoring against fires, poaching and grazing; eco-tourism income for villages.
Examples (Beyond NCERT): the Chipko movement in the Garhwal Himalaya, Joint Forest Management committees, the Bishnoi tradition in Rajasthan, sacred groves.
Conclude: conservation with people, not against them — the idea behind biosphere reserves.
Project 1: On an outline map mark (i) mangrove areas (ii) the Nanda Devi, Sunderbans, Gulf of Mannar and Nilgiri biosphere reserves (iii) the Forest Survey of India headquarters.
(i) Sunderbans, the Mahanadi, Godavari and Krishna deltas, the Andaman & Nicobar Islands (plus smaller patches on the Gujarat and west coasts). (ii) Nanda Devi — Uttarakhand; Sunderbans — West Bengal; Gulf of Mannar — Tamil Nadu coast; Nilgiri — the TN–Kerala–Karnataka junction. (iii) Dehradun, Uttarakhand (Beyond NCERT).
Project 2: List the trees, bushes and shrubs around your school, their local names and uses.
Make a three-column table (name, local name, use). Note whether each is native or planted — the chapter's first question: natural or planted vegetation?
What to remember
Numbers
Evergreen forestsrain over 200 cm; mean temperature above 22°C; trees up to 60 m+
Deciduous (monsoon) forests70–200 cm (moist 100–200, dry 70–100)
Thorn forestsbelow 50 cm; tussocky grass up to 2 m
Wet temperate forests1,000–2,000 m
Chir pine1,500–1,750 m
Blue pine and spruce2,225–3,048 m
Alpine forests3,000–4,000 m
Wetland area (NCERT)3.9 million ha; ≈ 70% under paddy
Mangroves4,992 sq km
Forest policy1952, revised 1988; target 33%
Social forestry classesNational Commission on Agriculture, 1976
Wildlife Act1972; amended 1991
National parks / sanctuaries (NCERT)107 / 573
Project Tiger1973: 9 reserves, 16,339 sq km → 58 reserves, 84,487 sq km core, 18 states
Tigers1,411 (2006) → 3,682 (2023); over 75% of the world's wild tigers
Biosphere reserves18 (first Nilgiri, 1986; latest Panna, 2011); 12 in UNESCO's network
One-liners
- Evergreen: Western Ghats (west slope), north-east, A&N — rosewood, mahogany, aini, ebony.
- Moist deciduous: teak, sal, sandalwood; dry deciduous: tendu, palas, khair; thorn: babool, ber, khejri.
- Deciduous = most widespread = monsoon forests.
- Deodar mainly in the western Himalaya; chinar and walnut support Kashmir crafts.
- Sholas: Nilgiri, Anaimalai, Palani hills.
- Mangroves: Sunderbans and A&N best; also the Mahanadi, Godavari, Krishna deltas.
- Ramsar (NCERT): Chilika and Keoladeo.
- Biosphere reserve = conservation + development + logistics (UNESCO MAB).
Traps to avoid
- Sandalwood is a deciduous (moist) species, not evergreen.
- Mahogany is tropical evergreen, not Himalayan.
- Target is 33% forest; actual cover is about one-fifth.
- Gulf of Mannar is a biosphere reserve; ‘Gulf of Kachchh’ and ‘Nallamalai’ are not.
- A biosphere reserve protects whole ecosystems, not a few species.
- Forest area (records) ≠ forest cover (satellite canopy).
- NCERT's ‘two Ramsar sites’ and ‘3.9 million ha’ are outdated.
- India's mangroves are about 3% of the world's, not 7% (FSI).
- Figure 5.8 omits four reserves — rely on Table 5.1.
How to strategise
Prelims — what UPSC asks
- Forest types and trees: why deciduous trees shed leaves (1983), sal (1989), alpine limits east vs west (1995), Sundari–West Bengal (1997), thorn forests in western Andhra (2002), mahogany not Himalayan (2008), largest forest type (2010), Himalayan plants (2014), teak (2015), wet evergreen states (2015), A&N's three forest types (2015), Khangchendzonga's climates (2015), Valley of Flowers (2019), deciduous trees (2023).
- Biosphere reserves: odd one out (1995, 2005), states matched (2004), UNESCO network (2008), what a reserve is for (2010), Nokrek (2013), Agasthyamala's components (2019). Learn Table 5.1 with states.
- Wetlands and mangroves: mangroves as shoreline protection (1996, 2026), largest inland saline wetland (2009), Ramsar wise use (2010, 2019), wetland statistics (2012).
- Policy and protection: Project Tiger (1991), forest cover one-fifth (1992, 2005), 33% (1999), afforestation programmes (1996), protected-area rules (2010, 2012), Schedule I (2017).
Mains — where it appears and how to answer
- GS1: factors behind the diversity of natural vegetation, and wildlife sanctuaries in rain forests (2023); causes of mangrove depletion and their coastal role (2019); status of forest resources and their link with climate change (2020).
- GS3: wetlands and the Ramsar idea of ‘wise use’ with examples (2018); the National Wetland Conservation Programme and India's Ramsar sites (2023).
- Answer frame: controls (rainfall, temperature, altitude, soil, tides) → types with NCERT's limits and trees → distribution (a quick sketch-map from memory is safer than a traced outline) → threats → policy, law and programmes → people's participation.
Self-check
Tap an option. NCERT's own exercise questions come first; the rest test the figures and common confusions.
1. Sandalwood is an example of:
2. Which one of the following was the purpose of Project Tiger?
3. In which state is the Nanda Devi Biosphere Reserve situated?
4. How many of India's biosphere reserves are recognised by UNESCO (per NCERT)?
5. What proportion of the country was targeted to be under forest in the Forest Policy?
6. Silver fir, juniper, birch and rhododendron are typical of which Himalayan zone?
7. Sholas are…
UPSC questions from this chapter
Open any question to attempt it in the Question bank — your attempt is saved to your progress.