Natural Vegetation and Wildlife — Practice

Question 1

Name the five major vegetation types of India.

Accepted Answer

Step 1 — List.
  1. Tropical Evergreen Forests (>200cm rain).
  2. Tropical Deciduous Forests (70-200cm rain).
  3. Thorn Forests and Scrubs (<70cm rain).
  4. Mountain Forests (varying with altitude).
  5. Mangrove Forests (coastal, tidal).

✦ Answer: Tropical Evergreen, Tropical Deciduous, Thorn Forests, Mountain Forests, Mangroves.

Question 2

What is Project Tiger? When was it launched?

Accepted Answer

Step 1 — Define and date.
  Project Tiger is an Indian government conservation programme launched in 1973 to save the Bengal Tiger from extinction. Recommended by the Indian Board for Wildlife after a 1973 tiger census revealed only ~1,800 wild tigers remained (down from 40,000 a century earlier).

Step 2 — Components.
  • Tiger Reserves (now 54 across India).
  • Habitat protection (forests + corridors).
  • Anti-poaching enforcement.
  • Reduction of human-wildlife conflict.
  • Scientific monitoring (tiger censuses every 4 years).

Step 3 — Results.
  Population grew from ~1,800 (1973) to 3,167 (2022 census). India now hosts ~70% of the world's wild tigers.

✦ Answer: Project Tiger is a government conservation programme launched in 1973 to save the Bengal Tiger. It has been highly successful — population grew from ~1,800 to 3,167 (2022). India now has ~70% of the world's wild tigers.

Question 3

Which is the wettest forest type in India? Give an example.

Accepted Answer

Step 1 — Identify.
  Tropical Evergreen Forests (also called Rainforests).

Step 2 — Rainfall requirement.
  >200 cm/year. Some areas get over 400 cm.

Step 3 — Locations and examples.
  • Western Ghats (Kerala, Karnataka coast, Maharashtra).
  • Northeast India (Assam, Meghalaya, Arunachal Pradesh).
  • Andaman & Nicobar Islands.
  Notable: Silent Valley (Kerala), Garo Hills (Meghalaya).

✦ Answer: Tropical Evergreen (Rainforest). Examples: Silent Valley (Kerala), Garo Hills (Meghalaya), parts of the Western Ghats.

Question 4

Name India's national animal and where it primarily lives.

Accepted Answer

Step 1 — Identify.
  National Animal of India: BENGAL TIGER (Panthera tigris tigris).

Step 2 — Where it lives.
  Tigers live in various habitats across India:
  • Sundarbans (West Bengal — mangrove tigers, unique in the world).
  • Bandhavgarh, Kanha, Pench (Madhya Pradesh — savanna-like terrain).
  • Corbett (UP — forest/grassland).
  • Ranthambore (Rajasthan).
  • Periyar, Bandipur, Mudumalai (Western Ghats).
  • Manas (Assam).
  • Forests across Central India.

Step 3 — Population.
  ~3,167 wild tigers (2022 census). ~70% of world's wild tigers in India.

✦ Answer: National Animal = BENGAL TIGER. Lives across various Indian habitats — most famously in Sundarbans (mangroves), and tiger reserves in MP, UP, Karnataka, Tamil Nadu. ~3,167 wild tigers (2022 census).

Question 5

Where in India are the largest mangrove forests located?

Accepted Answer

Step 1 — Sundarbans.
  Sundarbans (West Bengal) — the largest mangrove forest in the world (10,000 sq km total). India has 38%; Bangladesh has 62%.

Step 2 — Why Sundarbans.
  Formed by the Ganga-Brahmaputra delta — fresh-water rivers meeting salt sea water. Sundari trees give the forest its name.

Step 3 — Importance.
  • Largest natural buffer against Bay of Bengal cyclones.
  • Home to the only mangrove-dwelling tigers in the world.
  • UNESCO World Heritage Site.
  • Habitat for 250+ bird species.

Step 4 — Other Indian mangroves.
  Mahanadi, Krishna, Godavari, Kaveri deltas; Kerala backwaters; Andaman & Nicobar Islands.

✦ Answer: Sundarbans (West Bengal + Bangladesh) — the largest mangrove forest in the world. 38% in India, 62% in Bangladesh. Home to Royal Bengal Tigers.

Question 6

Distinguish moist deciduous and dry deciduous forests.

Accepted Answer

Step 1 — Common features.
  Both are TROPICAL DECIDUOUS FORESTS — meaning trees shed leaves in the dry season to reduce water loss. Both depend on the monsoon.

Step 2 — Moist Deciduous.
  • Rainfall: 100-200 cm/year.
  • Examples of locations: Western Maharashtra, Madhya Pradesh, Eastern Plateau, parts of Western Ghats.
  • Trees: Teak, Sal, Sandalwood, Shisham, Bamboo. Often dense.
  • More biodiverse; supports more wildlife.
  • Soil more fertile.

Step 3 — Dry Deciduous.
  • Rainfall: 70-100 cm/year.
  • Examples of locations: Punjab, Northern Madhya Pradesh, Chhota Nagpur Plateau.
  • Trees: Teak, Bamboo, Sal — but more spread out. Less dense.
  • Less biodiverse.
  • Many areas have been converted to agriculture due to lower rainfall (suitable for some crops).

Step 4 — Geographic transition.
  These forests transition gradually based on rainfall. Moving from a moister to drier zone within Madhya Pradesh, you'd see moist deciduous → dry deciduous → eventually thorn forest as rainfall decreases.

Step 5 — Conservation status.
  Both are India's MOST EXTENSIVE forest types. They are also the most-cleared for agriculture — only about 40% remain.

✦ Answer: Both are tropical deciduous (trees shed leaves in dry season). MOIST deciduous gets 100-200cm rain — denser, more biodiverse (teak, sal, sandalwood). DRY deciduous gets 70-100cm rain — sparser, less biodiverse, more converted to agriculture.

Question 7

What are the main threats to India's biodiversity?

Accepted Answer

Step 1 — Habitat loss.
  • Deforestation for agriculture, plantations.
  • Urban expansion into forests.
  • Infrastructure (highways, dams, mines) fragmenting habitats.
  • Conversion of natural forests to monoculture plantations (teak, rubber, eucalyptus, oil palm).

Step 2 — Poaching.
  • Tigers (for skins, bones — traditional medicine).
  • Elephants (for ivory).
  • Rhinos (for horn — folk medicine).
  • Pangolins (most trafficked mammal globally).
  • Birds and reptiles (illegal pet trade).
  • Pangolins, ground monitor lizards, leopards still poached for body parts.

Step 3 — Pollution.
  • Water pollution kills aquatic species.
  • Air pollution affects forests.
  • Pesticides (especially diclofenac) — Indian Vulture population collapsed by 99%.
  • Plastic waste affects marine and terrestrial wildlife.

Step 4 — Climate change.
  • Shifting habitat zones — many species can't move fast enough.
  • Sea-level rise threatens Sundarbans and coastal mangroves.
  • Glacial retreat affects Himalayan species (snow leopards, ibex).
  • Coral reef bleaching affects Andaman marine life.
  • Forest fires increasing in frequency.

Step 5 — Human-wildlife conflict.
  • Elephants in tea plantations, agriculture (Karnataka, Tamil Nadu, Kerala, Northeast).
  • Tigers and leopards in villages (Maharashtra, Karnataka, Sundarbans).
  • Carnivores attacking livestock.
  • Animals killed when conflicts escalate.
  • Increasing as forests shrink and humans expand.

Step 6 — Invasive species.
  • Lantana (introduced from Latin America) chokes Indian forests.
  • Eucalyptus plantations replace native species.
  • Invasive plants and animals disrupt ecosystems.

✦ Answer: (i) HABITAT LOSS (deforestation, urbanisation, infrastructure); (ii) POACHING (tigers, elephants, rhinos, pangolins); (iii) POLLUTION (chemicals, plastics, pesticides like diclofenac); (iv) CLIMATE CHANGE (shifting habitats, sea-level rise, glacial retreat); (v) HUMAN-WILDLIFE CONFLICT (elephants in plantations, tigers in villages); (vi) INVASIVE SPECIES (lantana). All are interconnected.

Question 8

How does Project Tiger work?

Accepted Answer

Step 1 — Tiger Reserves.
  Project Tiger creates specifically designated TIGER RESERVES — protected areas with strict regulations. As of 2024, there are 54 Tiger Reserves across 18 Indian states.

Step 2 — Habitat protection.
  Each reserve has:
  • Core area — entirely protected; no human activity except essential management.
  • Buffer area — surrounding, with some human use allowed.
  • Corridors — connecting reserves to allow tiger movement.

Step 3 — Anti-poaching.
  • Trained forest guards patrol reserves.
  • Camera traps and wildlife monitoring.
  • Strict enforcement of Wildlife Protection Act.
  • International cooperation against tiger product trafficking.

Step 4 — Scientific monitoring.
  • All-India Tiger Estimation every 4 years.
  • Camera traps + DNA analysis + satellite tracking.
  • Population genetic studies.
  • Habitat health monitoring.

Step 5 — Reducing human-wildlife conflict.
  • Compensation for villagers whose livestock is killed.
  • Better fencing.
  • Education and awareness.
  • Voluntary relocation of villages from core areas.

Step 6 — Community involvement.
  • Eco-tourism (revenue-sharing with local communities).
  • Local employment in conservation work.
  • Education programs in schools.

Step 7 — Success.
  Tiger population: 1,800 (1973) → 3,167 (2022). Project Tiger is one of the world's most successful conservation programmes.

✦ Answer: Project Tiger creates 54 designated Tiger Reserves with core areas (strict protection), buffer areas (limited use), and corridors (connecting reserves). It uses anti-poaching enforcement, scientific monitoring, conflict reduction, and community involvement. Tiger population has grown from 1,800 to 3,167 — a global conservation success.

Question 9

Identify the type of forest where each species is naturally found: (a) Cheetal (Spotted Deer), (b) Snow Leopard, (c) Saltwater Crocodile, (d) Asiatic Lion, (e) One-horned Rhinoceros.

Accepted Answer

Step 1 — Identify each species' habitat.

(a) CHEETAL (Spotted Deer):
  Tropical Deciduous Forests. Throughout India — Madhya Pradesh, Maharashtra, Western Ghats, Northeast.
  Most common deer species in Indian forests.

(b) SNOW LEOPARD:
  Mountain Forests (specifically Alpine Tundra zone).
  Himalayas — Ladakh, Spiti, Himachal Pradesh, Uttarakhand.
  Above 3,000 m altitude.

(c) SALTWATER CROCODILE:
  Mangrove Forests + Coastal waters.
  Sundarbans (West Bengal), Andaman & Nicobar Islands, Bhitarkanika (Odisha).
  Brackish water environments.

(d) ASIATIC LION:
  Tropical Deciduous Dry Forests + Thorn Forests.
  ONLY found in Gir Forest National Park, Gujarat (Saurashtra region).
  ~600 individuals worldwide — only place on Earth.

(e) ONE-HORNED RHINOCEROS:
  Grasslands + Marshes (within a moist climate).
  Mostly Kaziranga National Park (Assam) and a few other parks in Assam, West Bengal, Nepal.
  ~2,500 individuals worldwide (70% in India, 30% in Nepal).

Step 2 — Geographic pattern.
  India's wildlife is HIGHLY SPECIALISED. Each species is adapted to specific ecosystems. Lose the ecosystem and you lose the species.

✦ Answer: (a) Tropical Deciduous Forests; (b) Mountain Forests (Alpine); (c) Mangrove Forests / Coastal; (d) Tropical Deciduous Dry / Thorn (only in Gir, Gujarat); (e) Grasslands + Marshes (mostly Kaziranga, Assam).

Question 10

Why is the Sundarbans unique and important?

Accepted Answer

Step 1 — World's largest mangrove forest.
  Size: ~10,000 sq km. 62% in Bangladesh, 38% in India (West Bengal).
  Formed by Ganga-Brahmaputra delta — fresh-water meeting saltwater.

Step 2 — Unique ecosystem.
  • SUNDARI TREE: gives the forest its name. Mangrove species adapted to saline, waterlogged soil.
  • Other species: Avicennia, Rhizophora, Ceriops.
  • Trees have specialized roots (pneumatophores) that emerge above mud to breathe.

Step 3 — Unique wildlife.
  • ROYAL BENGAL TIGERS — the ONLY mangrove-dwelling tigers in the world. They swim well, climb trees, and adapt to the unique terrain.
  • Estuarine (Saltwater) Crocodiles.
  • Ganges River Dolphin (an endangered freshwater dolphin).
  • Fishing Cat (specialised mangrove predator).
  • 250+ bird species.
  • 130+ fish species.
  • Important shrimp and crab fisheries.

Step 4 — Climate buffer.
  Mangroves are the natural BARRIER between the ocean and human settlements. They:
  • Reduce cyclone damage (slow winds, absorb storm surges).
  • Trap sediment, preventing erosion.
  • Store carbon (in roots, in waterlogged soil — 'blue carbon').
  • Provide breeding grounds for fish.

Step 5 — Protection.
  • Sundarbans National Park (India) — established 1984.
  • Sundarbans Tiger Reserve — part of Project Tiger.
  • UNESCO World Heritage Site (1987).
  • Sundarbans Biosphere Reserve.
  • Bangladesh side has similar protections.

Step 6 — Climate change threats.
  • Sea-level rise: Sundarbans is sinking ~22 mm/year.
  • Salinity increase: making freshwater species harder to survive.
  • Cyclones intensifying (Amphan 2020, Yaas 2021).
  • 22% of Bangladesh's Sundarbans area already lost.

Step 7 — Value.
  Beyond biodiversity: provides livelihood for 4 million+ people (fishing, honey collection, tourism). Carbon sink. Storm protection for Kolkata and other cities.

✦ Answer: Sundarbans is the world's largest mangrove forest. Unique because: (i) only mangrove-dwelling tigers in the world (Royal Bengal Tigers swim and climb); (ii) Sundari trees, salt-tolerant species; (iii) acts as natural cyclone barrier; (iv) supports 4 million+ livelihoods; (v) UNESCO World Heritage Site. Major threat: sea-level rise (22 mm/year sinking).

Question 11

Describe India's five major vegetation types in detail.

Accepted Answer

Step 1 — Tropical Evergreen Forests (Rainforests). • Rainfall: >200 cm/year. • Locations: Western Ghats (Kerala, Karnataka, Maharashtra coast), Northeast India (Assam, Meghalaya, Arunachal), Andaman & Nicobar Islands. • Characteristics: Multi-layered canopy. Trees never shed all leaves at once. Closed canopy means little light reaches the ground. • Tree species: Mahogany, Ebony, Rosewood, Rubber, Bamboo. • Examples: Silent Valley (Kerala), Garo Hills (Meghalaya). Step 2 — Tropical Deciduous Forests. • Rainfall: 70-200 cm/year. • Most extensive Indian forest type — covers most of the country. • Trees shed leaves in dry season to reduce water loss. • Two subtypes: a) Moist Deciduous (100-200 cm): Teak, Sal, Sandalwood, Shisham, Bamboo. Madhya Pradesh, Maharashtra, Eastern Plateau. b) Dry Deciduous (70-100 cm): Teak, Bamboo, Sal — sparser. Punjab, parts of MP. • Most-cleared forest type. Only ~40% of original area remains. Step 3 — Thorn Forests and Scrubs. • Rainfall: <70 cm/year. • Locations: Western Rajasthan, Gujarat (Saurashtra, Kutch), interior Karnataka, parts of Andhra and MP. • Characteristics: Sparse, hardy, often spiny vegetation. Adapted to drought. • Plants: Khejri (Rajasthan state tree), Acacia, Babool, Kikar, Date Palm. • Wildlife: Camels, foxes, hyenas, wild ass (Rann of Kutch), porcupines, lizards. Step 4 — Mountain Forests. • Vary with altitude. • Below 1,500 m: Similar to tropical deciduous. • 1,500-3,000 m: Temperate forests — Pine, Oak, Deodar, Fir, Spruce. • 3,000-3,500 m: Alpine grasslands and meadows. • Above 3,600 m: Tundra — mosses, lichens, very low vegetation. • Locations: Himalayas, Nilgiris, Western Ghats, Patkai Hills. • Wildlife: Snow Leopard, Himalayan Tahr, Musk Deer, Red Panda (Eastern Himalayas). Step 5 — Mangrove (Littoral / Tidal) Forests. • Coastal areas where fresh and salt water meet. • Adapted to saline, waterlogged conditions. • Pneumatophores (breathing roots) emerge above mud. • Examples: - Sundarbans (West Bengal + Bangladesh) — largest in the world. - Mahanadi, Godavari, Krishna, Kaveri deltas. - Andaman & Nicobar Islands. - Kerala backwaters, Goa. • Tree species: Sundari (gives Sundarbans its name), Avicennia, Rhizophora. • Wildlife: Royal Bengal Tiger (Sundarbans), Saltwater Crocodile, Fishing Cat, Mangrove Monkey. Step 6 — Overall pattern. Indian vegetation reflects climate + topography + altitude. From rainforests (high rainfall) to thorn forests (low rainfall), each adapted to specific conditions. Mountain forests stack different types at different altitudes. Mangroves are unique coastal ecosystems. Step 7 — Conservation status. All five types are under threat: • Evergreen: <50% original area remains. • Deciduous: most cleared for agriculture. • Thorn: relatively intact but threatened by overgrazing. • Mountain: some areas protected (e.g., Valley of Flowers); others under pressure. • Mangroves: severely threatened by sea-level rise (especially Sundarbans). ✦ Answer: Five vegetation types: (i) Tropical Evergreen (rainforest, >200cm rain, Western Ghats, NE India); (ii) Tropical Deciduous (70-200cm, most of India, moist + dry); (iii) Thorn Forests (<70cm, Rajasthan, Gujarat); (iv) Mountain Forests (altitude-based zones in Himalayas); (v) Mangroves (coastal, Sundarbans). Each is adapted to specific rainfall + temperature + soil + altitude conditions. All face conservation challenges.

Question 12

Discuss the importance of Wildlife Sanctuaries, National Parks, and Biosphere Reserves in India.

Accepted Answer

Step 1 — Wildlife Sanctuaries.
  • Designation: Areas reserved for the protection of wildlife under the Wildlife Protection Act 1972.
  • Strictness: Less strict than National Parks. Limited human activity is allowed (grazing, collecting non-timber forest products, religious pilgrimage).
  • Number in India (2024): 567 wildlife sanctuaries.
  • Examples: Periyar (Kerala), Manas (Assam), Sariska (Rajasthan), Bandhavgarh (MP).
  • Function: Protect specific species or ecosystems while allowing some traditional uses.

Step 2 — National Parks.
  • Designation: Most strictly protected areas. No human activity (cultivation, grazing, hunting) is allowed except for specific scientific research.
  • Established by the Government with specific notification.
  • Number in India (2024): 106 national parks.
  • Examples: Jim Corbett (UP, India's first NP, 1936), Kaziranga (Assam — rhinos), Sundarbans (WB — tigers), Kanha (MP — tigers), Bandipur, Nagarhole.
  • Function: Full ecosystem protection. Higher conservation status than sanctuaries.

Step 3 — Biosphere Reserves.
  • Designation: Internationally recognized protected areas (UNESCO 'Man and Biosphere' programme).
  • Combines: STRICT CORE (full protection, no humans), BUFFER ZONE (limited use), TRANSITION ZONE (human settlement allowed).
  • Number in India (2024): 18 biosphere reserves.
  • Examples: Nilgiri (Tamil Nadu, Kerala, Karnataka), Nanda Devi (Uttarakhand), Sundarbans (WB), Manas (Assam), Great Nicobar.
  • Function: Conservation + scientific research + sustainable development. Try to balance human needs with ecosystem preservation.

Step 4 — Why all three are needed.

(a) Multiple levels of protection.
  Different ecosystems and species need different levels of protection. National Parks for highly vulnerable species; Sanctuaries for less critical areas; Biosphere Reserves for landscapes where humans and wildlife must coexist.

(b) Geographic coverage.
  Together, India's Protected Areas cover ~5% of land area — about 165,000 sq km. This is approaching but still below international targets (Aichi targets aimed for 17% by 2020).

(c) Specific species recovery.
  • Project Tiger: 54 Tiger Reserves within National Parks/Sanctuaries.
  • Kaziranga: One-horned Rhinoceros recovery.
  • Gir: Asiatic Lion protection.

(d) Climate buffers.
  Protected forests sequester carbon, regulate water, and protect against extreme weather.

(e) Economic benefits.
  Eco-tourism, scientific research, sustainable livelihoods. Major economic driver in some regions (Kanha, Bandhavgarh, Periyar tourism).

Step 5 — Limitations.
  • Total area protected (~5%) is still inadequate.
  • Many areas face encroachment.
  • Inadequate funding and staffing in many sanctuaries.
  • Conflict with local communities (displacement issues).
  • Climate change threatens even protected areas.

✦ Answer: India has three tiers of Protected Areas: (i) WILDLIFE SANCTUARIES (567) — moderate protection, some human use allowed; (ii) NATIONAL PARKS (106) — strictest protection, no human activity; (iii) BIOSPHERE RESERVES (18) — UNESCO-recognized, combining strict core + buffer + transition zones. Together they cover ~5% of India's land. Each has different purpose: strict protection (NPs), traditional use (sanctuaries), or balanced human-wildlife coexistence (biosphere reserves).

Practice — Natural Vegetation and Wildlife

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