Overview

PHYSICAL GEOGRAPHY
Geography · GS‑I and GS‑III

Forest Types of India
Natural vegetation and the Champion and Seth classification
5 broad forest types16 Champion and Seth type groups21.76% forest cover, ISFR 20234,992 sq km mangrove cover
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The forest types of India include the evergreen forests of the Western Ghats and the north-east, the deciduous forests that cover most of the Peninsula, the thorn scrub of Rajasthan, the mountain forests of the Himalaya and the mangroves of the deltas. Rainfall, temperature, altitude and soil decide which forest grows where. The forests are sorted into five main groups and, in the finer Champion and Seth classification of 1968, into sixteen type groups. The India State of Forest Report 2023 puts forest cover at 21.76 per cent of the country's area, still well below the one-third target of the 1988 forest policy.

Forest Types of India: Natural Vegetation and Its Controls

Natural Vegetation of India: Meaning and Controlling Factors

Natural vegetation is a plant community that has been left undisturbed over a long time, so that its species adjust to the climate and soil as fully as they can. A mango orchard or a garden tree is planted vegetation; the same species growing wild in a forest is natural vegetation. India shows great variety. Temperate vegetation marks the Himalayan heights, tropical rain forests grow in the Western Ghats and the Andaman and Nicobar Islands, mangroves fringe the deltas, and the desert and semi-desert of Rajasthan carry cacti, bushes and thorny plants.

Five controls explain this variety:

  • Rainfall: On the plains and plateaus it is the main control, deciding whether a forest is evergreen, deciduous or thorn.
  • Temperature: Evergreen forests need a mean annual temperature above 22 °C.
  • Altitude: In the mountains the temperature falls with height, and the vegetation changes with it.
  • Slope and aspect: The south-facing slopes of the Himalaya carry thicker vegetation than the drier north-facing slopes because they receive more precipitation.
  • Soil and water: Salt-tolerant mangroves grow only on tidal mud flats and in creeks and estuaries.

Human use adds a sixth influence. The British saw the commercial value of Indian forests and started large-scale exploitation; oak forests in Garhwal and Kumaon were replaced by pine (chir) to supply wood for railway lines, and forests were cleared for tea, rubber and coffee plantations.

Types of Forest in India: Five Broad Groups and Sixteen Type Groups

The number of forest types depends on the scale of the classification. On the basis of predominant vegetation and climatic region, Indian forests fall into five broad groups. Foresters use a finer scheme, the Champion and Seth classification, which names sixteen type groups.

The two schemes nest into each other. A type group such as "tropical moist deciduous" is one part of the broad tropical deciduous group, and two of the sixteen type groups, the wet evergreen and the semi-evergreen, fall in the first broad group.

The Five Main Forest Types of India

Tropical Evergreen and Semi-Evergreen Forests

Tropical evergreen forests grow in warm, humid areas with annual precipitation of over 200 cm and a mean annual temperature above 22 °C. They are found on the western slope of the Western Ghats, in the hills of the north-eastern region and in the Andaman and Nicobar Islands.

The structure is well stratified. Shrubs and creepers cover the layer closest to the ground, short trees stand above them, and a tall layer reaches 60 m or more. There is no definite time for the trees to shed their leaves, flower or fruit, so the forest looks green all year. The common trees are rosewood, mahogany, aini and ebony.

Semi-evergreen forests occupy the less rainy parts of the same regions. They hold a mixture of evergreen and moist deciduous trees, and the climbers growing underneath give the forest its evergreen look. The main species are white cedar, hollock and kail.

Tropical Moist Deciduous Forests

Tropical moist deciduous forests are the wetter half of the monsoon forests. They are most pronounced in regions with 100 to 200 cm of rainfall, in the north-eastern States along the foothills of the Himalaya, on the eastern slopes of the Western Ghats and in Odisha.

The main trees are teak, sal, shisham, hurra, mahua, amla, semul, kusum and sandalwood. In the Champion and Seth scheme this forest is Type Group 3 and, after the dry deciduous forest, it covers the second-largest area of any type group.

Tropical Dry Deciduous Forests: Parkland and Transitions

Tropical dry deciduous forests cover vast areas where rainfall ranges between 70 and 100 cm. On the wetter margins they pass into moist deciduous forest, and on the drier margins into thorn forest.

They are found in the rainier areas of the Peninsula and in the plains of Uttar Pradesh and Bihar. In the higher-rainfall parts of the Peninsular plateau and the northern Indian plain they take the form of parkland, with open stretches in which teak and other trees stand among patches of grass. When the dry season begins, the trees shed their leaves completely, and the forest looks like a vast grassland with bare trees all around.

The common trees are tendu, palas, amaltas, bel, khair and axlewood.

Tropical Thorn Forests of the Semi-Arid West

Tropical thorn forests occur where rainfall is less than 50 cm. They consist of a variety of grasses and shrubs. The plants remain leafless for most of the year, which gives an impression of scrub vegetation.

They cover the semi-arid areas of south-west Punjab, Haryana, Rajasthan, Gujarat, Madhya Pradesh and Uttar Pradesh. The important species are babool, ber, wild date palm, khair, neem, khejri and palas. Tussocky grass grows up to a height of 2 m as the undergrowth. In the western and southern parts of Rajasthan, the vegetation cover is very scanty because of low rainfall and overgrazing.

This is the forest of the rain-deficient west. It forms the dry end of the rainfall sequence that begins with the evergreen forest, and its stunted, leafless look is a plant response to scarce water.

Himalayan Montane Forests: Succession with Altitude

In mountainous areas the fall in temperature with increasing altitude brings a matching change in natural vegetation. Mountain forests are of two kinds, the northern mountain forests of the Himalaya and the southern mountain forests of the Peninsula.

The Himalayan ranges show a succession of vegetation from the tropical to the tundra, which changes with altitude:

  • Foothills: Deciduous forests grow in the foothills of the Himalaya.
  • 1,000 to 2,000 m: Wet temperate forests succeed them. In the higher hill ranges of north-eastern India, the hilly areas of West Bengal and Uttarakhand, evergreen broad-leaved trees such as oak and chestnut predominate.
  • 1,500 to 1,750 m: Pine forests develop in the same zone, with chir pine as a very useful commercial tree. Deodar, a highly valued endemic species, grows mainly in the western part of the range, and its durable wood is used in construction. The chinar and the walnut, which sustain the famous Kashmir handicrafts, also belong to this zone.
  • 2,225 to 3,048 m: Blue pine and spruce appear, and temperate grasslands occur in many places.
  • 3,000 to 4,000 m: Silver firs, junipers, pines, birch and rhododendrons grow, and the forest gives way to alpine pastures.
  • Above the pastures: Mosses and lichens form the tundra vegetation.

The alpine pastures are used extensively for transhumance by tribes such as the Gujjars, the Bakarwals, the Bhotiyas and the Gaddis.

The Champion and Seth scheme splits this sequence into several type groups, including subtropical pine, montane wet temperate, Himalayan moist temperate, Himalayan dry temperate and the sub-alpine and alpine groups.

Altitude belts, shown in a table and on a mountain profile: Foothills deciduous forests; 1,000 to 2,000 m wet temperate oak and chestnut, with chir pine at 1,500 to 1,750 m and deodar in the west; 2,225 to 3,048 m blue pine and spruce; 3,000 to 4,000 m silver fir, juniper and birch; above them alpine pastures and tundra. South-facing slopes carry denser cover than north-facing slopes.

Southern Montane Forests: Sholas of the Nilgiris, Anaimalai and Palani

The southern mountain forests lie in three distinct areas of Peninsular India, namely the Western Ghats, the Vindhyas and the Nilgiris. These hills are closer to the tropics and only about 1,500 m above sea level, so the vegetation is temperate in the higher regions and subtropical on the lower slopes of the Western Ghats, especially in Kerala, Tamil Nadu and Karnataka.

The forests of the higher Nilgiri, Anaimalai and Palani hills are called sholas. A shola is a patch of stunted montane forest in a valley amid rolling grassland, temperate in character although it lies in the tropics. Trees of economic significance in these forests include magnolia, laurel, cinchona and wattle. Similar forests occur in the Satpura and Maikal ranges.

Littoral and Swamp Forests: Mangroves and Tidal Wetlands

Littoral and swamp forests grow where land meets salt or brackish water. Mangroves grow along the coasts in salt marshes, tidal creeks, mud flats and estuaries, and they consist of a number of salt-tolerant species of plants. Creeks of stagnant water and tidal flows criss-cross these forests, and the forests shelter a wide variety of birds.

In India mangroves are highly developed in the Andaman and Nicobar Islands and the Sundarbans of West Bengal. Other areas of significance are the Mahanadi, Godavari and Krishna deltas. These forests are being encroached upon and need conservation.

Forest Types Compared: Rainfall, Regions and Trees

The main forest types differ in the rainfall or setting that decides them, in where they grow and in their typical trees.

Table 1. The main forest types of India compared
Forest type Rainfall and setting Where found Typical trees
Tropical evergreen Over 200 cm; mean annual temperature above 22 °C Western slope of the Western Ghats, north-eastern hills, Andaman and Nicobar Islands Rosewood, mahogany, aini, ebony
Tropical semi-evergreen Less than in the evergreen belt Less rainy parts of the Western Ghats, north-eastern hills and Andaman and Nicobar Islands White cedar, hollock, kail
Tropical moist deciduous 100 to 200 cm North-eastern States along the Himalayan foothills, eastern slopes of the Western Ghats, Odisha Teak, sal, shisham, mahua, sandalwood
Tropical dry deciduous 70 to 100 cm Rainier areas of the Peninsula, plains of Uttar Pradesh and Bihar Tendu, palas, amaltas, bel, khair
Tropical thorn Less than 50 cm South-west Punjab, Haryana, Rajasthan, Gujarat, Madhya Pradesh, Uttar Pradesh Babool, ber, khejri, neem, wild date palm
Montane (Himalaya) Set by altitude Foothills to the snowline Oak, chestnut, chir pine, deodar, blue pine, spruce, fir
Montane (south) Higher hills of the Peninsula Nilgiri, Anaimalai and Palani hills; Satpura and Maikal ranges Magnolia, laurel, cinchona, wattle
Littoral and swamp Tidal coasts, creeks and estuaries Andaman and Nicobar Islands, Sundarbans, Mahanadi, Godavari and Krishna deltas Salt-tolerant mangrove species

Champion and Seth Classification of Forest Types of India

Champion and Seth Classification: Origin, Basis and Structure

The Champion and Seth classification is the standard scheme for the forest types of India. Harry George Champion, a forest officer and silviculturist in British India, published an initial classification of the forest types of India and Burma in 1936. Champion and S. K. Seth revised it in 1968, in their book A Revised Survey of the Forest Types of India, and the result is called the Champion and Seth classification.

Using temperature and rainfall data, the 1968 scheme sorted the forests into five major forest groups, sixteen type groups (the climatic types) and over 200 subgroup types. Each type group is numbered one to sixteen, and subtypes carry codes such as 4B/TS2.

The purpose of the scheme was primarily forest use, specifically timber extraction. As the focus of Indian forestry shifted to conservation, the long list of subgroups created needless complexity for forest managers. The Forest Survey of India mapped forest types on a 1:50,000 scale in 2011, and the map covered 178 of the more than 200 types described in the 1968 scheme. A second exercise, completed in 2020, refined the forest type map, and the latest map is the one used in current carbon-stock calculations.

The 16 Forest Type Groups: Area and Growing Stock

The sixteen type groups differ widely in area and in growing stock, the volume of standing wood they hold.

Table 2. Area and growing stock of the sixteen Champion and Seth type groups, ISFR 2023
Type group Area, km² (ISFR 2023) Growing stock, million m³
1. Tropical wet evergreen 23,888 379.02
2. Tropical semi-evergreen 63,886 442.32
3. Tropical moist deciduous 1,33,187 1,057.85
4. Littoral and swamp 5,611 20.91
5. Tropical dry deciduous 2,80,580 1,067.55
6. Tropical thorn 13,755 18.81
7. Tropical dry evergreen 801 2.86
8. Subtropical broadleaved hill 31,017 210.79
9. Subtropical pine 18,108 175.18
10. Subtropical dry evergreen 138 2.26
11. Montane wet temperate 19,445 295.86
12. Himalayan moist temperate 29,815 736.59
13. Himalayan dry temperate 4,487 85.80
14. Sub-alpine 12,498 371.01
15. Moist alpine scrub 534 6.16
16. Dry alpine scrub 2,082 24.68

The first seven groups are tropical, and they are the forests of the plains, plateaus and coasts. Groups 8 to 10 are subtropical hill forests. Groups 11 to 13 are temperate. Groups 14 to 16 are sub-alpine and alpine, found just below and above the tree line.

Mangroves fall under Type Group 4, which covers the littoral and swamp forests. Within it the scheme recognises these types: 4A/L1 littoral forest, 4B/TS1 mangrove scrub, 4B/TS2 mangrove forest, 4B/TS3 saltwater mixed forest and 4B/TS4 brackish water mixed forest.

The area under this group is small, 5,611 km², but its ecological weight is large, because mangroves protect the coast and store carbon.

Which Forest Type Covers the Largest Area in India?

The tropical dry deciduous forest (Type Group 5) covers the largest area among the sixteen groups, 2,80,580 km², followed by the tropical moist deciduous forest (Type Group 3) at 1,33,187 km², and then the tropical semi-evergreen forest (Type Group 2) at 63,886 km². The sixteen groups together cover 6,39,834 km².

Taken as a broad group, the tropical deciduous forests are the most widespread forests in India.

These areas come from the forest type map, which is drawn on a different basis from the forest cover map, so the total of 6,39,834 km² does not match the forest cover of 7,15,342.61 km². The growing stock is also highest in the dry deciduous (1,067.55 million m³) and moist deciduous (1,057.85 million m³) groups.

Bars of area in km² for the sixteen type groups: 1 Tropical wet evergreen 23,888; 2 Tropical semi-evergreen 63,886; 3 Tropical moist deciduous 1,33,187; 4 Littoral and swamp 5,611; 5 Tropical dry deciduous 2,80,580; 6 Tropical thorn 13,755; 7 Tropical dry evergreen 801; 8 Subtropical broadleaved hill 31,017; 9 Subtropical pine 18,108; 10 Subtropical dry evergreen 138; 11 Montane wet temperate 19,445; 12 Himalayan moist temperate 29,815; 13 Himalayan dry temperate 4,487; 14 Sub-alpine 12,498; 15 Moist alpine scrub 534; 16 Dry alpine scrub 2,082. Total 6,39,834 km².

Forest Types of India Map

Reading the Forest Map: Rainfall Belts, Relief and Coasts

Rainfall and relief decide where the five broad types grow. The wettest belts, the western slope of the Western Ghats and the north-eastern hills, carry the evergreen forest, and the Andaman and Nicobar Islands carry it too. The deciduous forests fill most of the land between the wet and the dry belts, from the Himalayan foothills, the eastern slopes of the Western Ghats, Odisha and the rainier Peninsula to the plains of Uttar Pradesh and Bihar. The driest north-west, covering south-west Punjab, Haryana, Rajasthan and Gujarat, carries the thorn forest. The Himalaya and the southern hills carry the montane forests, and the tidal coasts carry the mangroves.

Map of India from real geometry with fourteen numbered forest regions. Evergreen: Western slope of the Western Ghats, north-eastern hills, Andaman and Nicobar Islands. Moist deciduous: Odisha, eastern slopes of the Western Ghats. Dry deciduous: Plains of Uttar Pradesh and Bihar, the Peninsular plateau. Thorn: Rajasthan, Gujarat. Montane: Himalaya; Nilgiri, Anaimalai and Palani hills. Mangrove: Sundarbans, Bhitarkanika, Pichavaram.

Forest Types and Rainfall: A Quick Rule for Mains Answers

Each broad type has its own rainfall range:

  • Above 200 cm: Tropical evergreen and semi-evergreen forests.
  • 100 to 200 cm: Moist deciduous forests, within the deciduous range of 70 to 200 cm.
  • 70 to 100 cm: Dry deciduous forests.
  • Below 50 cm: Thorn forests.

The gap between 50 and 70 cm is where the dry deciduous and thorn forests overlap and merge. Relief breaks the rule in the mountains, where altitude replaces rainfall as the main control, and on the coast, where tides and salinity do.

The main controls each have a classic example: The Western Ghats for rainfall, the Himalaya for altitude, the Sundarbans for tides and salt, and Garhwal and Kumaon, where pine replaced oak, for human use.

Forest Cover in India: ISFR 2023

Forest Cover, Tree Cover and Recorded Forest Area: Definitions

Three terms recur in forest questions, and the India State of Forest Report (ISFR) defines each of them:

  • Forest cover: All lands of one hectare or more with a tree canopy of 10 per cent or more, irrespective of ownership and legal status. It includes orchards, bamboo and palm. It shows trees on any land, whether or not the land is notified as forest.
  • Recorded forest area (RFA): All the geographic area recorded as forest in government records. It largely consists of Reserved Forests and Protected Forests under the Indian Forest Act, 1927, and may include Unclassed Forests, Village Forests and other areas recorded as forest. It may or may not have tree cover.
  • Tree cover: The area covered by trees outside recorded forest areas, from a single tree to patches of less than one hectare.

Forest cover is not only natural forest. The ISFR makes no distinction by origin of the tree crop or by species, so forest cover includes bamboo, fruit orchards, coconut, oil-palm, eucalyptus, rubber plantations and shade trees in tea and coffee plantations.

ISFR 2023 Findings: Forest and Tree Cover at a Glance

The Forest Survey of India (FSI) brings out the India State of Forest Report on a biennial basis, and ISFR 2023 is the 18th such report; the first appeared in 1987. FSI assesses forest and tree resources by interpreting remote-sensing satellite data and by a field-based National Forest Inventory.

For ISFR 2023, forest cover mapping used 306 images from the LISS‑III sensor of the Resourcesat satellites, acquired between October and December 2021, at a spatial resolution of 23.5 m, and ground validation used 8,494 data collection points.

Table 3. Forest and tree cover of India, ISFR 2023
Class Area, km² Percentage of geographical area
Forest cover 7,15,342.61 21.76
Tree cover 1,12,014.34 3.41
Total forest and tree cover 8,27,356.95 25.17
Scrub 43,622.64 1.33
Non-forest 24,16,489.29 73.50
Geographical area 32,87,468.88 100.00

Compared with the 2021 assessment, forest and tree cover rose by 1,445.81 km². Of this, forest cover rose by 156.41 km² and tree cover by 1,289.40 km². Trees outside forests, meaning forest cover outside recorded forest areas plus tree cover, extend over 3,07,000 km², which is 37.11 per cent of the total forest and tree cover.

Forest Density Classes: Very Dense, Moderately Dense and Open Forest

The ISFR classifies forest cover by canopy density, which is a measure of how closely the tree crowns cover the ground:

Table 4. Forest density classes, ISFR 2023
Class Canopy density Area in 2023, km²
Very Dense Forest (VDF) 70 per cent or more 1,02,502.20
Moderately Dense Forest (MDF) 40 per cent or more but less than 70 per cent 3,07,673.28
Open Forest (OF) 10 per cent or more but less than 40 per cent 3,05,167.13
Scrub Less than 10 per cent, generally shrubs interspersed with trees 43,622.64

The three forest classes add up to the forest cover of 7,15,342.61 km². Scrub is not part of forest cover. Non-forest covers cropland, settlements, water bodies, grasslands, snow-clad areas and deserts.

Across the country, moderately dense and open forest each cover more than twice the area of very dense forest, so most Indian forest is of medium or light density. Inside recorded forest areas the pattern is the same, with very dense forest at 91,024.93 km², moderately dense 2,43,543.85 km² and open forest 1,85,796.54 km².

State Rankings by Forest Cover in ISFR 2023

By area, the three States with the largest forest cover are Madhya Pradesh (77,073 km²), Arunachal Pradesh (65,882 km²) and Chhattisgarh (55,812 km²). Including tree cover, the order is Madhya Pradesh (85,724 km²), Arunachal Pradesh (67,083 km²) and Maharashtra (65,383 km²). Odisha (52,434 km²) and Maharashtra (50,859 km²) follow Chhattisgarh in forest cover alone.

By share of geographical area, Lakshadweep has the highest forest cover (91.33 per cent), followed by Mizoram (85.34 per cent) and the Andaman and Nicobar Islands (81.62 per cent). A total of 19 States and Union Territories have more than 33 per cent of their area under forest cover, and eight of them have above 75 per cent: Mizoram, Lakshadweep, the Andaman and Nicobar Islands, Arunachal Pradesh, Nagaland, Meghalaya, Tripura and Manipur.

Change since 2021 also matters in answers:

  • Largest increase in forest cover: Mizoram (242 km²), Gujarat (180 km²) and Odisha (152 km²).
  • Largest increase in forest and tree cover: Chhattisgarh (684 km²), Uttar Pradesh (559 km²), Odisha (559 km²) and Rajasthan (394 km²).
  • Largest losses inside recorded forest areas: Tripura, Telangana, Assam, Andhra Pradesh and Gujarat.

Forest cover in the hill districts is 2,83,713.20 km², which is 40 per cent of the geographical area of those districts. The total forest and tree cover in the North Eastern region is 1,74,394.70 km², which is 67 per cent of the geographical area of those States, although the region shows a decrease of 327.30 km² of forest cover in this assessment.

Recorded Forest Areas: Reserved, Protected and Unclassed Forests

For legal purposes forests are classed by the State governments' records. Reserved forests are regarded as the most valuable for conserving forest and wildlife resources. Protected forests are protected from any further depletion. Unclassed forests are other forests and wastelands belonging to governments, individuals and communities. Reserved and protected forests together are called permanent forest estates, and they are maintained for producing timber and other forest produce and for protective reasons.

The recorded forest area of the country in 2023 is:

Table 5. Recorded forest area by legal category, 2023
Category Area, km²
Reserved forest 4,43,253
Protected forest 2,12,859
Unclassed forest 1,19,265
Total recorded forest area 7,75,377 (23.59 per cent of geographical area)

Reserved forests make up more than half of the total. Arunachal Pradesh has the largest unclassed area (27,312 km²), and its recorded forest area is 61.55 per cent of the State. In Himachal Pradesh 68.16 per cent of the area is recorded forest, most of it protected forest (28,887 km²).

Growing Stock, Carbon Stock and Climate Targets

Forests matter for climate as stores of carbon. The ISFR 2023 estimates:

  • Growing stock: 6,429.64 million m³ in forests and trees outside forests, of which 4,478.89 million m³ lie inside forests and 1,950.75 million m³ outside recorded forest areas.
  • Forest carbon stock: 7,285.5 million tonnes of carbon in the country's forests, an increase of 81.5 million tonnes over the previous assessment.
  • Carbon sink under the NDC: The total carbon sink of forest and tree cover has reached 30.43 billion tonnes of CO₂ equivalent, which is 2.29 billion tonnes of additional carbon sink compared with the base year of 2005, against the target of 2.5 to 3.0 billion tonnes by 2030.
  • Bamboo: The bamboo-bearing area is 1,54,670 km², an increase of 5,227 km² over 2021.
  • Forest fires: 2,03,544 fire hotspots were detected in the 2023‑24 fire season, against 2,23,333 in 2021‑22.

Mangrove Forests of India

Mangrove Cover in India: Latest Figures and State Ranking

India's total mangrove cover is 4,991.68 km², which is 0.15 per cent of the country's geographical area. Of this, very dense mangrove is 1,463.97 km² (29.33 per cent), moderately dense mangrove is 1,500.84 km² (30.07 per cent) and open mangrove is 2,026.87 km² (40.60 per cent). Compared with the 2021 assessment there is a net decrease of 7.43 km².

Table 6. Mangrove cover by State and Union Territory, ISFR 2023
State or Union Territory Mangrove cover 2023, km² Change from 2021, km²
West Bengal 2,119.16 +1.41
Gujarat 1,164.06 −36.39
Andaman and Nicobar Islands 608.29 −4.65
Andhra Pradesh 421.43 +13.01
Maharashtra 315.09 +12.39
Odisha 259.06 +1.55
India 4,991.68 −7.43

West Bengal has the largest mangrove cover by a wide margin, then Gujarat. Andhra Pradesh recorded the largest increase, attributed to natural regeneration, plantation and conservation, and Maharashtra the next largest, from natural regeneration and plantation by the State Forest Department. Gujarat's fall of 36 km² is the largest loss.

Mangrove cover in km² in 2023 with change since 2021: West Bengal 2,119.16 (plus 1.41); Gujarat 1,164.06 (minus 36.39); Andaman and Nicobar Islands 608.29 (minus 4.65); Andhra Pradesh 421.43 (plus 13.01); Maharashtra 315.09 (plus 12.39); Odisha 259.06 (plus 1.55). India 4,991.68 km², 0.15 per cent of the area; net change minus 7.43 km².

Mangrove Regions, Species and Famous Sites

India's mangrove habitat is divided broadly into three regions, namely the east coast, the west coast and the islands of the Andaman and Nicobar group with the Lakshadweep atoll. The east coast has 40 mangrove species in 14 families and 22 genera, the west coast 27 species in 11 families and 16 genera, and the Andaman and Nicobar Islands 38 species in 13 families and 19 genera, while Lakshadweep has only 3. India has 46 genuine mangrove species and ranks third in the world in mangrove plant diversity, behind Indonesia and Australia. Among the thirteen coastal States and Union Territories, the Andaman and Nicobar Islands have the highest diversity; the east coast as a whole has more species because it spans several States.

The Sundarbans are the best-known site. The forest is a mangrove area in the Ganges Delta, formed by the Ganges, Brahmaputra and Meghna, and it spans from the Hooghly River in West Bengal to the Baleswar River in Bangladesh. The most abundant tree species are sundari (Heritiera fomes) and gewa (Excoecaria agallocha), and the area is known for the Bengal tiger. The name Sundarbans is most likely derived from the sundari tree. The Indian Sundarbans were assessed as endangered in 2020 under the IUCN Red List of Ecosystems framework.

Other sites worth knowing:

  • Bhitarkanika, Odisha: The State's largest mangrove forest, in the Mahanadi delta region, known for saltwater crocodiles and called a "mangrove genetic paradise" of the world.
  • Pichavaram, Tamil Nadu: A mangrove forest with a network of channels and islands, in Cuddalore district.
  • Krishna and Godavari deltas, Andhra Pradesh: A breeding ground for fish and prawns.
  • Andaman and Nicobar Islands: The most diverse mangroves, with eight exclusive species.

India has two globally threatened mangrove species out of eleven listed on the IUCN Red List: Heritiera fomes and Sonneratia griffithii. Both face local extinction because of low seed viability and slow growth.

Causes of Mangrove Depletion in India and the World

Mangroves are being lost worldwide. Of the areas with adequate data, about 35 per cent of mangroves appear to have been destroyed, and the world mangrove area fell from 1,57,590 km² in 1990 to 1,47,170 km² in 2020. The loss is slower now than it was, but pressure continues. The main causes are these:

  • Shrimp farming: It causes approximately a quarter of the destruction of mangrove forests, and the closed-pond system is the most damaging form because it needs the destruction of a large part of the mangrove.
  • Fuel and construction wood: Mangroves are cut for charcoal, cooking, heating and as building material.
  • Development and clearance: Large-scale clearing and settlement have hit the Sundarbans region, which supports one of the densest human populations in Asia.
  • Reduced fresh water: In the Bangladesh part of the Sundarbans, fresh water reaching the mangroves was considerably reduced from the 1970s because of upstream diversion.
  • Natural stressors: Changes in the environment itself, rather than clearance by people, are expected to become the main driver of mangrove loss in the coming decades.

Mangroves as Coastal Shield, Nursery and Carbon Store

Mangroves protect and build the coast, shelter young marine life, store carbon, hold a rich variety of species and support livelihoods, so each loss weakens all of these.

  • Coastal shield: Mangrove swamps protect coasts from erosion, storm surges during tropical cyclones, and tsunamis. Their massive root systems dissipate wave energy, and they slow tidal water so that sediment is deposited, which means mangroves build their own environment.
  • Nursery habitat: The mesh of roots offers a quiet marine habitat for young organisms, and larger marine animals use it as a nursery for their offspring.
  • Carbon store: Mangroves possess the highest carbon density of all terrestrial ecosystems. Despite occupying less than one per cent of the total tropical forest area, they sequester approximately 3 per cent of the world's tropical forest carbon.
  • Biodiversity: India's mangrove forests hold 4,107 recorded species, of which 23 per cent are flora and 77 per cent fauna.
  • Livelihood base: Conserving and restoring mangroves is also a way of sustaining local livelihoods, which is one of the stated objectives of the MISHTI scheme.

Mangrove Conservation: MISHTI and State Practices

The Mangrove Initiative for Shoreline Habitats and Tangible Incomes (MISHTI) is a government-led initiative announced in line with the UN Decade of Ecosystem Restoration 2021‑2030. It aims to explore possible areas for mangrove development covering approximately 540 km² across 11 States and 2 Union Territories during five years from 2023‑24, with the primary focus on the Sundarbans delta, the Hooghly estuary in West Bengal, other bays and wetlands. The scheme is to be implemented by converging funds of the Compensatory Afforestation Fund Management and Planning Authority (CAMPA), the rural employment guarantee scheme (MGNREGS) and other sources, and plantation is carried out with local communities and NGOs.

The National Coastal Mission also has a component, "Conservation and Management of Mangroves and Coral Reefs", that has extended financial support for mangrove protection to coastal States and Union Territories.

State practices include the Fish Bone technique of canal bank planting in Andhra Pradesh and Tamil Nadu where tidal amplitude is low, a dedicated Mangrove Cell in Maharashtra (which has also declared Sonneratia alba the State Mangrove Tree), the Kannur Mission for restoration in Kerala, and the Raised Bed method in Gujarat.

Forest Conservation Policy and Law in India

National Forest Policy 1988: One-Third Target and People's Participation

India adopted a forest policy in 1952 and modified it in 1988. The 1988 policy stresses sustainable forest management, conserving and expanding forest reserves while meeting the needs of local people. It aims at:

  • Bringing 33 per cent of the geographical area under forest cover.
  • Maintaining environmental stability and restoring forests where the ecological balance was disturbed.
  • Conserving the natural heritage of the country, its biological diversity and genetic pool.
  • Checking soil erosion and the spread of desert land, and reducing floods and droughts.
  • Increasing forest cover through social forestry and afforestation on degraded land.
  • Increasing forest productivity to make timber, fuel, fodder and food available to the rural population dependent on forests.
  • Creating a massive people's movement, involving women, to encourage planting of trees, stop felling and reduce pressure on existing forests.

A direct outcome of the 1988 policy was the Joint Forest Management programme, started in 1990, which gave local communities a role in protecting and developing forests.

Forest (Conservation) Act, 1980 and the 2023 Amendment

The Forest (Conservation) Act, 1980, is a central statute for the conservation of forests. It provides that the de-reservation of reserved forests, the use of forest land for a non-forest purpose, the assignment of forest land by lease to a private entity, and the clearing of naturally grown trees for reafforestation all need the prior permission of the Central Government.

After the Supreme Court judgment of 12 December 1996, the Act applied to revenue forest land and to land recorded as forest in government records, and to areas that look like forest in the dictionary sense. This produced different interpretations of the Act for recorded forest, private forest land and plantations.

The Forest (Conservation) Amendment Act, 2023, changed this in several ways:

  • New name: The Act is now the Van (Sanrakshan Evam Samvardhan) Adhiniyam, 1980.
  • Preamble: A preamble was inserted to broaden the scope of the Act.
  • Clarity on applicability: The scope of the Act on various types of land was clarified to remove ambiguity.
  • Exemptions: The Act no longer applies to strategic projects concerning national security within 100 km of the international borders, the Line of Actual Control and the Line of Control; to 0.10 ha of forest land for connectivity to habitations along roads and railways; to up to 10 ha for security-related infrastructure; and to up to 5 ha for public utility projects in Left Wing Extremism affected districts. These exemptions remain subject to conditions such as compensatory afforestation.
  • Zoos, safaris and ecotourism: These now count among the forestry activities permitted on forest land.

The stated reasons were to promote plantation outside forests, because fear of the Act discouraged planting on private land, and to meet the NDC target of an additional carbon sink of 2.5 to 3.0 billion tonnes of carbon dioxide equivalent.

Social Forestry, Missions, CAMPA and the Forest Survey of India

Social forestry means the management and protection of forests and afforestation on barren lands to help environmental, social and rural development. The National Commission on Agriculture (1976) classified social forestry into three categories:

  • Urban forestry: Raising and managing trees on public and privately owned land in and around urban centres, such as green belts, parks, roadside avenues and industrial green belts.
  • Rural forestry: Promotion of agro-forestry and community forestry. Agro-forestry raises trees and agricultural crops on the same land, and community forestry raises trees on public or community land such as village pasture, temple land, roadsides and canal banks.
  • Farm forestry: Farmers grow trees for commercial and non-commercial purposes on their farm lands.

Missions and funds sit beside these categories:

  • Green India Mission: Launched in February 2014, it aims to protect, restore and expand forest cover, working through Joint Forest Management Committees.
  • Nagar Van Yojana: Established in 2020 to develop green spaces in urban and peri-urban areas.
  • CAMPA: The authority compensates for the loss of forest cover and ecosystem services caused by the diversion of forest land for non-forestry purposes.
  • Ek Ped Maa Ke Naam: A campaign launched on 5 June 2024 that encourages citizens to plant trees in honour of mothers.

The Forest Survey of India, headquartered in Dehradun, was founded in June 1981 as the successor of the Pre-investment Survey of Forest Resources, a project started in 1965. It works under the Ministry of Environment, Forest and Climate Change and conducts forest surveys to monitor land and forest resources. Its biennial India State of Forest Report has appeared since 1987.

Protected Areas in Rain Forest Regions: Wildlife Sanctuaries and National Parks

Forest protection rests on the Indian Forest Act, 1927, the Van (Sanrakshan Evam Samvardhan) Adhiniyam, 1980, the Wildlife (Protection) Act, 1972, and the State Forest Acts, and enforcement is mostly the responsibility of State governments. The Wildlife (Protection) Act, 1972, is the main legal framework for wildlife conservation. Its two main objectives are to protect the endangered species listed in its schedules and to give legal support to the conservation areas classified as national parks, sanctuaries and closed areas.

Rain forest regions show why such areas matter:

  • Namdapha, Arunachal Pradesh: It was declared a wildlife sanctuary in 1972, then a national park and a tiger reserve in 1983. It covers 1,985.23 km² and harbours the northernmost lowland evergreen rainforests in the world at 27 degrees north latitude. Its elevation ranges between 200 and 4,571 m, so the vegetation runs from evergreen and moist deciduous forest to temperate broadleaved, coniferous and alpine vegetation.
  • Silent Valley, Kerala: It is one of the last undisturbed tracts of South Western Ghats mountain rain forests and tropical moist evergreen forest in India, with a core area of 89.52 km² inside the Nilgiri Biosphere Reserve. The Save Silent Valley movement of the 1970s stopped a hydroelectric project that threatened the forest.

Sanctuaries and parks protect habitat and gene pools, keep catchments and corridors intact, and give people a stake through eco-tourism and community participation. In rain forest regions that legal protection covers the evergreen stands, and the Silent Valley case shows that public opinion can protect them too.

Previous Year UPSC‑CSE Questions

Each Prelims question is explained option by option, and each Mains question comes with an answer outline.

  1. UPSC Prelims 2026Which of the following best explain(s) the rationale for protecting mangrove ecosystems in the context of climate resilience?
    1. Mangroves reduce tidal energy and store freshwater, making them ideal sites for paddy cultivation in saline estuarine belts.
    2. Their salt-sensitive roots filter seawater, making mangroves key to converting coastal land into freshwater aquaculture zones.
    3. By withstanding tidal surges and offering biomass resources, mangroves function both as natural bio-shields and livelihood bases for rural communities.

    Select the answer using the code given below:

    1. a 1 only
    2. b 1 and 2
    3. c 2 and 3
    4. d 3 only
    How to approach this Prelims question

    Question type: Multiple statements

    Approach: Test each statement against what mangroves are. They are salt-tolerant plants of tidal mud flats, creeks and estuaries, not freshwater stores for paddy. Their roots tolerate salt, not filter it for freshwater aquaculture. They dissipate wave energy against storm surges and tsunamis and supply biomass, fish and honey to coastal communities, which is the climate-resilience case for protection.

    Trap to watch: Accepting the freshwater statements; mangroves are salt-tolerant tidal forests.

    Why each option is right or wrong:

    • (a) 1 only: Wrong. Mangroves are salt-tolerant tidal forests, and they do not store freshwater for paddy cultivation.
    • (b) 1 and 2: Wrong. Both statements misdescribe the roots and the water; mangrove roots tolerate salt and do not make freshwater zones.
    • (c) 2 and 3: Wrong. Statement 2 is false because the roots are salt-tolerant, not salt-sensitive filters.
    • (d) 3 only: Correct. Mangroves withstand surges and supply biomass, so they act as bio-shields and livelihood bases.

    Answer: (d) 3 only. Only the bio-shield and livelihood statement is true.

  2. UPSC Prelims 2023Consider the following trees:
    1. Jackfruit (Artocarpus heterophyllus)
    2. Mahua (Madhuca indica)
    3. Teak (Tectona grandis)

    How many of the above are deciduous trees?

    1. a Only one
    2. b Only two
    3. c All three
    4. d None
    How to approach this Prelims question

    Question type: How many are correct

    Approach: Place each tree in its forest. Mahua and teak are main trees of the tropical moist deciduous forest, whose trees shed their leaves in the dry season. The jackfruit is a large evergreen tree of the wet evergreen forests. Two of the three are deciduous.

    Trap to watch: Treating every forest fruit tree as deciduous; the jackfruit is evergreen.

    Why each option is right or wrong:

    • (a) Only one: Wrong. Mahua and teak are both deciduous, so one is too few.
    • (b) Only two: Correct. Mahua and teak are deciduous, and the jackfruit is evergreen.
    • (c) All three: Wrong. The jackfruit is an evergreen tree.
    • (d) None: Wrong. Teak and mahua are deciduous.

    Answer: (b) Only two. Teak and mahua are deciduous; the jackfruit is evergreen.

  3. UPSC Prelims 2015Consider the following States:
    1. Arunachal Pradesh
    2. Himachal Pradesh
    3. Mizoram

    In which of the above States do 'Tropical Wet Evergreen Forests' occur?

    1. a 1 only
    2. b 2 and 3 only
    3. c 1 and 3 only
    4. d 1, 2 and 3
    How to approach this Prelims question

    Question type: Multiple statements

    Approach: Tropical wet evergreen forests need more than 200 cm of rainfall and a mean annual temperature above 22 °C. They are found on the western slope of the Western Ghats, in the hills of the north-eastern region and in the Andaman and Nicobar Islands. Arunachal Pradesh and Mizoram are north-eastern hill States, so both qualify. Himachal Pradesh lies in the Himalaya, where the vegetation changes with altitude from deciduous foothill forest through wet temperate oak and pine forest to alpine pastures, so it is not a wet evergreen State.

    Trap to watch: Counting Himachal Pradesh because it is hilly and wet; its forests change with altitude and are montane.

    Why each option is right or wrong:

    • (a) 1 only: Wrong. Mizoram, in the north-eastern hills, also has wet evergreen forest, so item 3 (Mizoram) must be included.
    • (b) 2 and 3 only: Wrong. Himachal Pradesh has Himalayan montane forest, not tropical wet evergreen forest, so item 2 (Himachal Pradesh) fails.
    • (c) 1 and 3 only: Correct. Arunachal Pradesh and Mizoram both lie in the north-eastern hills, which carry the forest.
    • (d) 1, 2 and 3: Wrong. Including Himachal Pradesh is the error.

    Answer: (c) 1 and 3 only. The north-eastern hills carry wet evergreen forest, and Himachal Pradesh has montane forest.

  4. UPSC Prelims 2015In India, in which one of the following types of forests is teak a dominant tree species?
    1. a Tropical moist deciduous forest
    2. b Tropical rain forest
    3. c Tropical thorn scrub forest
    4. d Temperate forest with grasslands
    How to approach this Prelims question

    Question type: Single correct answer

    Approach: Match each option with its typical trees. Teak, sal, shisham, hurra, mahua, amla, semul, kusum and sandalwood are the main trees of the tropical moist deciduous forest, which grows in 100 to 200 cm of rainfall. Rosewood, mahogany, aini and ebony belong to the evergreen rain forest. Babool, ber, wild date palm, khair, neem and khejri belong to the thorn forest. Oak, chestnut, chir pine, deodar, blue pine and spruce belong to the Himalayan temperate forests.

    Trap to watch: Picking the rain forest because teak is a valuable timber; teak marks the moist deciduous forest.

    Why each option is right or wrong:

    • (a) Tropical moist deciduous forest: Correct. Teak heads the list of its main species.
    • (b) Tropical rain forest: Wrong. Its trees are rosewood, mahogany, aini and ebony.
    • (c) Tropical thorn scrub forest: Wrong. Its trees are babool, ber, khair, neem and khejri.
    • (d) Temperate forest with grasslands: Wrong. The Himalayan temperate forests carry oak, chestnut, pine and deodar.

    Answer: (a) Tropical moist deciduous forest. Teak is the characteristic tree of the tropical moist deciduous forest.

  5. UPSC Prelims 2015Which one of the following regions of India has a combination of mangrove forest, evergreen forest and deciduous forest?
    1. a North Coastal Andhra Pradesh
    2. b South-West Bengal
    3. c Southern Saurashtra
    4. d Andaman and Nicobar Islands
    How to approach this Prelims question

    Question type: Single correct answer

    Approach: Find the region that carries all three types. Most of the forests of the Andaman and Nicobar Islands are evergreen, areas of deciduous forest occur on North Andaman, Middle Andaman, Baratang and parts of South Andaman, and mangroves are highly developed on the coast. The tropical evergreen forests of India are found on the western slope of the Western Ghats, in the north-eastern hills and in the Andaman and Nicobar Islands, so a region outside that list cannot hold all three.

    Trap to watch: Choosing the Sundarbans region; it has mangroves but no evergreen forest.

    Why each option is right or wrong:

    • (a) North Coastal Andhra Pradesh: Wrong. It is not among the evergreen forest regions; the mangroves of Andhra Pradesh lie in the Godavari and Krishna deltas.
    • (b) South-West Bengal: Wrong. The Sundarbans give mangroves, but the evergreen forest regions are the Western Ghats, the north-eastern hills and the Andaman and Nicobar Islands.
    • (c) Southern Saurashtra: Wrong. The semi-arid areas of Gujarat carry thorn forest, and the region is not among the evergreen forest regions.
    • (d) Andaman and Nicobar Islands: Correct. They have mostly evergreen forest, patches of deciduous forest and highly developed mangroves.

    Answer: (d) Andaman and Nicobar Islands. The Andaman and Nicobar Islands carry evergreen forest, deciduous forest and mangroves together.

  6. UPSC Prelims 2011The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
    1. a The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out
    2. b The mangroves provide both food and medicines which people are in need of after any natural disaster
    3. c The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or tsunami
    4. d The mangrove trees do not get uprooted by storms and tides because of their extensive roots
    How to approach this Prelims question

    Question type: Single correct answer

    Approach: The protection mangroves give is physical and comes from the roots. Massive root systems dissipate wave energy and slow tidal water, so mangrove swamps protect coasts from erosion, storm surges and tsunamis, and the stands stay in place. Nursery and carbon-storage roles are real, but they are not what makes mangroves a safety hedge against a surge.

    Trap to watch: Choosing the canopy or the food supply; the protection comes from the roots.

    Why each option is right or wrong:

    • (a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out: Wrong. The protection comes from the living root system, not from keeping people away.
    • (b) The mangroves provide both food and medicines which people are in need of after any natural disaster: Wrong. This is a relief benefit after the event, not protection against the wave.
    • (c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or tsunami: Wrong. The protective mechanism is the root system dissipating wave energy; the canopy gives no shelter against a surge.
    • (d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots: Correct. The extensive root system dissipates wave energy and keeps the trees from being uprooted.

    Answer: (d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots. The extensive root system lets mangroves stay in place and absorb wave energy.

  7. UPSC Prelims 2010In India, which type of forest among the following occupies the largest area?
    1. a Montane Wet Temperate Forest
    2. b Sub-tropical Dry Evergreen Forest
    3. c Tropical Moist Deciduous Forest
    4. d Tropical Wet Evergreen Forest
    How to approach this Prelims question

    Question type: Single correct answer

    Approach: Compare the areas of the four listed type groups in the latest forest type map. The tropical moist deciduous forest covers 1,33,187 km², the montane wet temperate forest 19,445 km², the tropical wet evergreen forest 23,888 km² and the subtropical dry evergreen forest 138 km². The tropical dry deciduous forest is larger still (2,80,580 km²), but it is not among the options, so the answer among the options stays the moist deciduous forest.

    Trap to watch: Answering dry deciduous from the national ranking; it is not among the options.

    Why each option is right or wrong:

    • (a) Montane Wet Temperate Forest: Wrong. It covers 19,445 km².
    • (b) Sub-tropical Dry Evergreen Forest: Wrong. It covers only 138 km².
    • (c) Tropical Moist Deciduous Forest: Correct. It covers 1,33,187 km², the largest of the four.
    • (d) Tropical Wet Evergreen Forest: Wrong. It covers 23,888 km².

    Answer: (c) Tropical Moist Deciduous Forest. Of the four options, the moist deciduous forest covers the largest area, 1,33,187 km².

  8. UPSC Prelims 1999The minimum land area recommended for forest cover to maintain proper ecological balance in India is
    1. a 25%
    2. b 33%
    3. c 43%
    4. d 53%
    How to approach this Prelims question

    Question type: Single correct answer

    Approach: The National Forest Policy of 1988 aims at bringing 33 per cent of the geographical area under forest cover to maintain environmental stability and ecological balance. The current figure is far lower, so the number is a target, not a present level.

    Trap to watch: Picking 25 per cent, which is close to today's forest and tree cover, not the target.

    Why each option is right or wrong:

    • (a) 25%: Wrong. This is close to the present forest and tree cover (25.17 per cent), not the target.
    • (b) 33%: Correct. The 1988 policy target is 33 per cent of the geographical area.
    • (c) 43%: Wrong. No policy target is set at this level.
    • (d) 53%: Wrong. No policy target is set at this level.

    Answer: (b) 33%. The policy target is 33 per cent of the geographical area under forest cover.

  9. UPSC Mains 2023 GS‑IIdentify and discuss the factors responsible for diversity of natural vegetation in India. Assess the significance of wildlife sanctuaries in rain forest regions of India.
    Answer outline

    The outline sets out what the question asks, the main arguments, relevant examples and the direction of the conclusion; it is not a full model answer.

    Directive verbs: Identify and discuss; assess

    Approach: Name each control on vegetation with an example, then assess sanctuaries in rain forest regions.

    Introduction: India's vegetation runs from tundra to mangroves because climate and soil change from region to region.

    Body (sub-themes to develop):

    • Factors: Rainfall (above 200 cm, 100 to 200 cm, 70 to 100 cm, below 50 cm), temperature (evergreen forests need a mean above 22 °C), altitude (Himalayan succession), slope and aspect (south-facing slopes thicker), soil and tides (mangroves), and human use (pine replacing oak in Garhwal and Kumaon, plantations).
    • Sanctuaries: The Wildlife (Protection) Act, 1972 gives legal support to sanctuaries; Namdapha holds the northernmost lowland evergreen rainforest at 27 degrees north; Silent Valley is one of the last undisturbed tracts of Western Ghats rain forest and the Save Silent Valley movement saved it; sanctuaries protect habitat, gene pools and catchments.

    Conclusion: The natural controls explain India's diversity of vegetation, and protected areas in the rain forest regions keep that diversity from being lost.

  10. UPSC Mains 2020 GS‑IExamine the status of forest resources of India and its resultant impact on climate change.
    Answer outline

    Directive verb: Examine

    Approach: Set out the status with ISFR 2023 figures, then the carbon and climate link.

    Introduction: Forest cover is 7,15,342.61 km² (21.76 per cent), and with tree cover 8,27,356.95 km² (25.17 per cent), against the policy target of 33 per cent.

    Body (sub-themes to develop):

    • Status: Density split of very dense, moderately dense and open forest; State leaders by area and by share; 19 States above 33 per cent; recorded forest area of 7,75,377 km²; forest type map with dry and moist deciduous forests the largest groups; mangroves at 4,991.68 km²; gains in forest and tree cover of 1,445.81 km² since 2021 and losses in the North East (327.30 km²).
    • Climate impact: Forests hold a carbon stock of 7,285.5 million tonnes; the carbon sink reached 30.43 billion tonnes of carbon dioxide equivalent, 2.29 billion tonnes above 2005 against the 2.5 to 3.0 billion tonne goal; mangroves have very high carbon density; forest fires (2,03,544 hotspots in 2023‑24) can release stored carbon.
    • Way forward: Plantation outside forests, the Green India Mission, MISHTI, compensatory afforestation under CAMPA.

    Conclusion: Forests are the main land-based sink, and the quality of cover (density) matters as much as its extent.

  11. UPSC Mains 2019 GS‑IDiscuss the causes of depletion of mangroves and explain their importance in maintaining coastal ecology.
    Answer outline

    Directive verb: Discuss

    Approach: Give the causes of depletion first, then each coastal service mangroves provide.

    Introduction: Mangroves are salt-tolerant forests of tidal coasts; their cover is 4,991.68 km², 0.15 per cent of the country, with West Bengal and Gujarat in the lead.

    Body (sub-themes to develop):

    • Causes: Shrimp farming (about a quarter of world destruction), fuel and building wood, clearance and settlement, diversion of fresh water, and natural stressors.
    • Importance: Shield against erosion, storm surge and tsunami; fish and crustacean nursery; carbon store (highest carbon density of terrestrial ecosystems); biodiversity (4,107 species); livelihoods.
    • Way forward: MISHTI (540 km² across 11 States and 2 Union Territories), community-based plantation, State methods such as the Fish Bone technique and Raised Bed method.

    Conclusion: Gujarat's loss beside the gains in Andhra Pradesh and Maharashtra shows that management decides whether mangroves survive, so conservation must go with restoration.

Sources

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This article draws on the current NCERT geography textbooks, the India State of Forest Report and the other sources listed under Sources.

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