This MCQ module is based on: Montane & Mangrove Forests, Forest Conservation
TOPIC 13 OF 17
Montane & Mangrove Forests, Forest Conservation
🎓 Class 11
Social Science
CBSE
Theory
Ch 5 — Natural Vegetation
⏱ ~28 min
🌐 Language: [gtranslate]
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Chapter 5 · Natural Vegetation — Montane Forests, Mangroves & Forest Conservation
Climb the Himalayas in your imagination. At 1,000 m the air is warm and damp; oaks and chestnuts wave their broad leaves at you. By 1,500 m you push into a fragrant forest of chir pine and the prized deodar. At 3,000 m the trees give way to silver firs and spruce, and beyond that to alpine meadows and tundra mosses. Then descend to the deltaic Sundarbans of West Bengal, where the Sundari tree grows with its roots half-submerged in salt water. This part walks you through India's altitudinal forest belts in the Himalayas, the mangrove swamps of the coast, the state-wise distribution of forest cover, and India's policies for forest conservation.
5.8 Montane Forests — Forests of the Mountains
In mountainous areas, the decrease in temperature with increasing altitude leads to a corresponding change in natural vegetation. Climb high enough and the climate of every latitude can be recreated on a single hillside — tropical at the base, temperate in the middle, alpine and tundra at the top. Mountain forests? in India are classified into two broad types:
- The northern mountain forests — the Himalayan succession.
- The southern mountain forests — the Western Ghats, Vindhyas and Nilgiris.
5.8.1 The Himalayan Vegetation Ladder
The Himalayan ranges show a stunning succession of vegetation from the tropical to the tundra, changing with altitude:
| Altitude | Belt & Climate | Indicator Species |
|---|---|---|
| Foothills | Tropical & subtropical deciduous | Sal, semul, mahua (deciduous trees of the foothills) |
| 1,000 – 2,000 m | Wet temperate; evergreen broadleaf | Oak, chestnut (predominant in NE Himalayas, hilly West Bengal & Uttaranchal) |
| 1,500 – 1,750 m | Pine forest belt; subtropical pine | Chir Pine — the highly valued commercial tree |
| 1,800 – 2,500 m | Western Himalayan dominant | Deodar (durable construction wood, endemic), chinar & walnut (Kashmir handicrafts) |
| 2,225 – 3,048 m | Upper temperate coniferous | Blue pine, spruce; with temperate grasslands at places |
| 3,000 – 4,000 m | Alpine forests & pastures | Silver fir, juniper, pine, birch, rhododendron |
| Above 4,000 m | Tundra | Mosses and lichens — the realm of frost |
🌲 Why Deodar matters
Deodar is a highly valued endemic species that grows mainly in the western part of the Himalayan range. Its wood is durable and especially favoured for construction. Together with chinar and walnut, deodar forms the resource base for the famous Kashmir handicrafts.
At higher reaches, there is a transition to alpine? forests and pastures. Silver firs, junipers, pines, birch and rhododendrons appear between 3,000–4,000 m. These pastures are used extensively for transhumance by tribes such as the Gujjars, Bakarwals, Bhotiyas and Gaddis, who move up with their herds in summer and descend in winter.
An interesting asymmetry: the southern slopes of the Himalayas carry a thicker vegetation cover because they receive higher precipitation than the drier north-facing slopes. At the very highest altitudes, mosses and lichens form part of the tundra vegetation.
Figure 5.C: The Himalayan vegetation altitude zones — tropical at the foothills, tundra at the summit.
5.8.2 The Southern Mountain Forests
The southern mountain forests cover three distinct areas of Peninsular India:
- The Western Ghats
- The Vindhyas
- The Nilgiris
Because these ranges sit closer to the tropics and are only about 1,500 m above sea level, vegetation is temperate in the higher regions and subtropical on the lower regions of the Western Ghats — especially in Kerala, Tamil Nadu and Karnataka. The temperate forests of these hills are locally called Sholas in the Nilgiris, Anaimalai and Palani hills. Other trees of economic significance include magnolia, laurel, cinchona and wattle. Such forests are also found in the Satpura and the Maikal ranges.
📖 Sholas — A Quick Definition
Sholas are the patchy temperate, evergreen forests found in the high-altitude valleys of the Nilgiris, Anaimalai and Palani hills, separated by rolling grasslands. They store water and feed countless mountain streams that water peninsular India.
5.9 Littoral and Swamp Forests
India is rich in wetland? habitats. The total wetland area is 3.9 million hectares, of which about 70 per cent is under paddy cultivation. Two sites — Chilika Lake (Odisha) and Keoladeo National Park (Bharatpur) — are protected as water-fowl habitats under the international Ramsar Convention on Wetlands.
🌐 What is an International Convention?
An international convention is an agreement among member states of the United Nations. The Ramsar Convention on Wetlands of International Importance is one such treaty.
5.9.1 Eight Wetland Categories
The country's wetlands have been grouped into eight categories:
- The reservoirs of the Deccan Plateau in the south, together with lagoons and other wetlands of the southern west coast.
- The vast saline expanses of Rajasthan, Gujarat and the Gulf of Kachchh.
- Freshwater lakes and reservoirs from Gujarat eastwards through Rajasthan (Keoladeo National Park) and Madhya Pradesh.
- The delta wetlands and lagoons of India's east coast (e.g. Chilika Lake).
- The freshwater marshes of the Gangetic Plain.
- The floodplains of the Brahmaputra, the marshes and swamps in the hills of north-east India and the Himalayan foothills.
- The lakes and rivers of the montane region of Kashmir and Ladakh.
- The mangrove forest and other wetlands of the island arcs of the Andaman and Nicobar Islands.
5.9.2 Mangroves — Forests of the Tidal Zone
Mangroves? grow along coasts in salt marshes, tidal creeks, mud flats and estuaries. They consist of a number of salt-tolerant species of plants. Crisscrossed by creeks of stagnant water and tidal flows, these forests give shelter to a wide variety of birds.
In India, mangrove forests cover 4,992 sq. km, which is 7 per cent of the world's mangrove forests. They are most highly developed in:
- The Andaman & Nicobar Islands.
- The Sundarbans of West Bengal — home of the famous Sundari tree (Heritiera fomes), after which the forest is named.
- The Mahanadi, the Godavari, the Krishna and the Cauvery deltas of the east coast — palm and coconut belts together with mangrove cover.
These forests are being encroached upon by aquaculture, urbanisation and shipping channels, and hence they urgently need conservation.
Figure 5.D: Mangrove root system — stilt-like prop roots anchor the tree in shifting mud, while pneumatophores rise above water to breathe at low tide.
Activity 5.4 · LET'S EXPLORE — How does a Mangrove survive in salt water?
- List two adaptations that help a mangrove survive in salt-water and waterlogged mud.
- Why are the prop roots and pneumatophores both essential — what would happen if you remove either?
- Find out the local name of the dominant mangrove tree of the Sundarbans (the West Bengal delta).
Pointers: (1) Salt-tolerant cells filter out salt; thick waxy leaves reduce water loss; viviparous seeds germinate while still on the tree to give a head-start in tidal mud; aerial breathing roots collect oxygen. (2) Prop roots anchor the tree against tides; pneumatophores supply oxygen to roots in waterlogged mud — without prop roots the tree falls; without pneumatophores it suffocates. (3) The Sundari (Heritiera fomes) — the very name "Sundarbans" comes from this tree.
5.10 Forest Cover in India — A State-Wise Look
The Forest Survey of India (FSI), headquartered in Dehradun, regularly assesses the forest cover of the country in its biennial India State of Forest Reports. Forest cover varies enormously across states: a few densely forested states account for a disproportionately large share of the national total.
| Rank | State | Indicative Forest Cover (sq. km) | Why it matters |
|---|---|---|---|
| 1 | Madhya Pradesh | ~77,000 | Largest forest cover in India by area; sal, teak and dense central plateau forests |
| 2 | Arunachal Pradesh | ~66,000 | Eastern Himalayan evergreen forests; one of the world's biodiversity hotspots |
| 3 | Chhattisgarh | ~55,000 | Sal-rich central tribal forests; dense moist deciduous |
| 4 | Odisha | ~52,000 | Moist deciduous, mangroves at Bhitarkanika |
| 5 | Maharashtra | ~50,000 | Western Ghats evergreen + Vidarbha deciduous |
| 6 | Andhra Pradesh | ~29,000 | Eastern Ghats deciduous + Krishna-Godavari mangroves |
| 7 | Telangana | ~21,000 | Dry deciduous forests of central Deccan |
| 8 | Karnataka | ~38,000 | Western Ghats evergreen, sandalwood country |
Figure 5.E: Indicative forest cover (sq. km) of leading Indian states — based on Forest Survey of India reports. Madhya Pradesh leads in absolute area.
📊 Forest Area vs. Forest Cover
Forest Area is the area legally notified and recorded as forest by Government records. Forest Cover is the area actually covered by trees of canopy density > 10 per cent, regardless of legal status. The two need not match: a notified forest may have lost trees through deforestation; a non-forest land may have a thick orchard or plantation.
5.11 Forest Conservation
Forests have an intricate inter-relationship with life and environment. They provide numerous direct and indirect advantages to our economy and society. Hence, conservation of forests is of vital importance to the survival and prosperity of humankind.
5.11.1 The 1952 / 1988 Forest Policy
Accordingly, the Government of India proposed a nation-wide forest conservation policy and adopted a forest policy in 1952, further modified in 1988. According to the new forest policy, the Government emphasises sustainable forest management in order to conserve and expand forest reserves on the one hand, and to meet the needs of local people on the other.
5.11.2 Seven Aims of the Forest Policy
- Bringing 33 per cent of the geographical area under forest cover.
- Maintaining environmental stability and restoring forests where ecological balance has been disturbed.
- Conserving the natural heritage of the country, its biological diversity and genetic pool.
- Checking soil erosion, the extension of desert lands, and the reduction of floods and droughts.
- Increasing the forest cover through social forestry and afforestation on degraded land.
- Increasing the productivity of forests to make timber, fuel, fodder and food available to the rural population dependent on forests, and encouraging the substitution of wood.
- Creating a massive people's movement involving women to encourage the planting of trees, stop the felling of trees and thus reduce pressure on existing forests.
"To a vast number of tribal people, the forest is a home, a livelihood, their very existence. It provides them food, fruits of all kinds, edible leaves, honey, nourishing roots and wild game. Tribal communities live in harmony with nature and protect forests." — NCERT Class 11, India: Physical Environment.
5.11.3 Forests and Tribals
Forests and tribals are very closely related. The age-old knowledge of tribal communities regarding forestry can be put to use in the development of forests. Rather than treating tribals as mere collectors of minor forest produce, they should be made growers of minor forest produce and encouraged to participate in conservation.
5.12 Steps Initiated under the Forest Conservation Policy
Based on the forest conservation policy, the Government of India initiated several schemes designed to involve people directly in forest management.
5.12.1 Social Forestry
Social forestry? is the management and protection of forests, and afforestation on barren lands, with the purpose of helping in the environmental, social and rural development of the country. The National Commission on Agriculture (1976) classified social forestry into three categories: urban forestry, rural forestry and farm forestry.
Urban Forestry
Raising and managing trees on public and privately owned lands in and around urban centres — green belts, parks, roadside avenues, industrial and commercial green belts. The aim is cleaner air and a cooler micro-climate for cities.
Rural Forestry
Lays emphasis on the promotion of agro-forestry? and community forestry. The forest serves rural livelihoods first.
Agro-Forestry
Raising of trees and agriculture crops on the same piece of land, including waste patches. It combines forestry with agriculture, simultaneously producing food, fodder, fuel, timber and fruit.
Community Forestry
Raising of trees on public or community land — village pasture and temple land, roadsides, canal banks, strips along railway lines, schools, etc. Provides benefits to the community as a whole, including the landless.
5.12.2 Farm Forestry
Farm forestry is the term applied to the process under which farmers grow trees for commercial and non-commercial purposes on their own farm lands. Forest departments of various states distribute seedlings of trees free of cost to small and medium farmers. Land of margins of agricultural fields, grasslands and pastures, areas around homes and cow sheds may be used for raising trees under non-commercial farm forestry.
5.12.3 Joint Forest Management (JFM)
Joint Forest Management? (JFM) is a partnership between forest-fringe communities and the State Forest Departments. Communities help protect and manage degraded forest land in return for access to non-timber forest produce (tendu leaves, mahua, fuelwood) and a share of the timber harvested when the forest matures. JFM has become one of India's most successful village-level conservation models, especially in West Bengal and Andhra Pradesh.
Activity 5.5 · DISCUSS — A village panchayat plans new forestry
- A village panchayat has 50 hectares of degraded land. Decide which combination of social forestry types — urban, rural, agro-, community or farm forestry — is most suitable.
- List two species you would plant for fuelwood, two for fodder, and two for timber.
- Suggest one mechanism to involve women, who often gather fuelwood, in the forest management committee.
Pointers: (1) For 50 ha rural degraded land, a mix of community forestry (on common land) and farm forestry (on private margins) under a JFM structure is ideal. (2) Fuelwood: babool, neem; fodder: subabul, drumstick; timber: teak, sissoo. (3) Reserve at least one-third seats in the JFM committee for women and link the forest's fuelwood share directly to women-led self-help groups, since they are the prime users.
📋
Competency-Based Questions — Montane & Mangrove Forests, Conservation
Case Study: A team of researchers is conducting a vegetation survey across India. They climb the Himalayas from Dehradun (650 m) to Auli (3,000 m), then sail to the Sundarbans of West Bengal, then travel to Madhya Pradesh — the state with the largest forest area. They are also studying how Joint Forest Management has transformed degraded forest patches into productive community resources.
Q1. The Sundari tree is found in:
L1 RememberAnswer: (B) — The Sundari (Heritiera fomes) is the dominant tree of the Sundarbans mangrove delta of West Bengal, after which the entire forest is named.
Q2. As the team climbs from 1,000 m to 3,500 m in the Himalayas, the most likely sequence of dominant species they encounter is:
L3 ApplyAnswer: (B) — The classical Himalayan altitudinal sequence: oak/chestnut at 1,000–2,000 m, pine/deodar at 1,500–1,750 m, silver fir/spruce around 2,225–3,048 m, then birch and rhododendron in the alpine 3,000–4,000 m belt.
Q3. The percentage of geographical area targeted to be brought under forest cover by India's Forest Policy is:
L2 UnderstandAnswer: (B) — The 1988 Forest Policy aims to bring 33 % of the country's geographical area under forest and tree cover.
Q4. The southern slopes of the Himalayas carry a thicker vegetation cover than the northern slopes mainly because:
L4 AnalyseAnswer: (B) — The south-west monsoon strikes the southern slopes first; they receive heavier rainfall and so support thicker forest. The north-facing slopes lie in a partial rain-shadow and are correspondingly drier and sparser.
HOT Q. A coastal village in Odisha lies just inland of a small mangrove patch. A super-cyclone is forecast in 36 hours. Argue, in five points, why the mangrove patch could be the village's most important defence — and design a one-line policy that links cyclone insurance premiums to local mangrove conservation.
L6 CreateHint: Five points: (i) prop roots break wave energy by 30–50 %, (ii) mangroves trap silt and slow storm-surge inundation, (iii) they shield the soil from salt-water intrusion preserving farmland productivity, (iv) they provide a quick-recover fish nursery after the storm, and (v) they act as a carbon sink reducing future cyclones. Policy line: "Households living within 500 m of an actively conserved mangrove patch shall pay 30 % lower premium under the State Cyclone Insurance Scheme." This directly rewards conservation.
⚖️ Assertion–Reason Questions — Montane Forests, Mangroves & Conservation
Options:
(A) Both A and R are true, and R is the correct explanation of A.
(B) Both A and R are true, but R is NOT the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(A) Both A and R are true, and R is the correct explanation of A.
(B) Both A and R are true, but R is NOT the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
Assertion (A): The Himalayan vegetation shows a clear succession from tropical to tundra in a single hillside.
Reason (R): Temperature falls with increasing altitude, so each rise of about 1,000 m mimics the climatic conditions of higher latitudes.
Answer: (A) — Both A and R are true, and R is the correct explanation. Altitude is the master control: a vertical climb of a few thousand metres covers, climatically, what would otherwise take a horizontal journey of thousands of kilometres towards the pole.
Assertion (A): Mangrove forests need conservation in India.
Reason (R): They protect the coast from cyclones and tidal surges, harbour rich biodiversity, and yet are being encroached upon for shipping, aquaculture and urban expansion.
Answer: (A) — Both statements are true and R correctly explains A. Of the world's 7 % of mangroves located in India, the most highly developed are the Sundarbans and the A&N Islands; both face heavy human pressure.
Assertion (A): Joint Forest Management is a successful conservation strategy in India.
Reason (R): JFM excludes local communities from forest use to allow regrowth of degraded patches.
Answer: (C) — A is true, but R is false. JFM does the opposite of what R says — it explicitly involves local communities as joint managers, granting them rights to non-timber produce and a share of timber. Inclusion, not exclusion, is JFM's signature feature.
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Class 11 Geography — India: Physical Environment
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