Natural Vegetation and Wildlife — Class 9 (CBSE)

India is one of just 17 'megadiverse' countries in the world. It contains:

• 90,000+ animal species (8% of world's wildlife).
• 47,000+ plant species (12% of world's plants).
• 4 of the world's 36 biodiversity hotspots.
• Tigers (~ 70% of the world's wild tigers in India).
• Asian elephants (~ 60% of world population).

This biodiversity is the legacy of India's varied climate, topography, and 4,000+ years of human-wildlife coexistence. But it's also under severe threat — from habitat loss, poaching, and climate change. This chapter is about what India has, what it's losing, and what's being done to save it.

1. The story — why India is so biodiverse

India's biodiversity comes from three converging factors:

1. Tropical location — India spans tropical and subtropical latitudes (8°-37° N), supporting diverse ecosystems.
2. Varied topography — Himalayas, plains, plateau, desert, coast, and islands create different habitats.
3. Monsoon climate — wet/dry seasonality supports specific plant and animal adaptations.

Over millions of years, this combination has produced an exceptionally rich biological heritage. From snow leopards in the Himalayas to crocodiles in the Sundarbans, from blue whales off Kerala to one-horned rhinos in Assam — India's biodiversity is unmatched among densely populated countries.

2. What is natural vegetation?

Natural vegetation is the plant cover that grows in a region without human intervention. It's adapted to local climate, soil, and topography.

In India, very little TRULY natural vegetation remains — most has been modified by human activity over millennia. What we study are the natural vegetation TYPES that WOULD grow if humans had not intervened, or that persist in protected and remote areas.

3. India's five major vegetation types

(a) Tropical Evergreen Forests (Rainforests)

• Rainfall: > 200 cm/year.
• Areas: Western Ghats (Kerala, Karnataka, Maharashtra coast), Northeast India (Assam, Arunachal, Meghalaya), Andaman & Nicobar Islands.
• Characteristics: Dense, multi-layered, broadleaved evergreen trees (mahogany, ebony, rosewood, rubber, bamboo).
• Trees never shed all their leaves at once.
• Closed canopy — little light reaches the ground.
• Examples: Silent Valley (Kerala), Garo Hills (Meghalaya), Western Ghats.

(b) Tropical Deciduous Forests (Monsoon Forests)

• Rainfall: 70-200 cm/year.
• Areas: Most of India — central, eastern, north India.
• Characteristics: Trees shed leaves once a year (during dry season) to reduce water loss.
• Two types:
  • Moist deciduous (100-200 cm rain): teak, sal, sandalwood, shisham, bamboo.
  • Dry deciduous (70-100 cm rain): teak, sal, bamboo, but more spread out.
• India's most extensive forest type.
• Examples: Madhya Pradesh forests, Chhattisgarh forests, Western Maharashtra.

(c) Thorn Forests and Scrubs

• Rainfall: < 70 cm/year.
• Areas: Western Rajasthan, Gujarat (Saurashtra, Kutch), parts of Karnataka, Andhra Pradesh, Madhya Pradesh.
• Characteristics: Sparse vegetation. Trees and shrubs are short, hardy, often spiny. Adapted to drought.
• Examples: Khejri (Rajasthan state tree), acacia, palm, kikar, babool.
• Animals: camels, foxes, hyenas, lizards.

(d) Mountain Forests

These 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.
• Areas: Himalayas, Nilgiris, Western Ghats, Patkai Hills.
• Examples: Sundarvan in Sikkim, Valley of Flowers in Uttarakhand.

(e) Mangrove Forests (Littoral / Tidal)

• Found in coastal areas where salt-water and freshwater meet.
• Adapted to saline, waterlogged conditions.
• Roots emerge above the mud (pneumatophores) for air.
• Examples:
  • Sundarbans (West Bengal + Bangladesh) — largest mangrove forest in the world.
  • Mahanadi delta, Krishna delta, Godavari delta, Kaveri delta.
  • West coast: Kerala backwaters, Goa.
• Main species: Sundari tree (gives Sundarbans its name), Avicennia, Rhizophora.

4. India's wildlife heritage

National animal symbols

• National Animal: BENGAL TIGER. India has ~ 70% of the world's wild tigers (3,167 as of 2022 census).
• National Bird: PEACOCK.
• National Aquatic Animal: GANGES RIVER DOLPHIN.
• National Tree: BANYAN.
• National Flower: LOTUS.

Iconic Indian species

• Tiger: Northern Indian forests (MP, UP), Sundarbans, Western Ghats, NE India.
• Asian Elephant: Kerala, Karnataka, Tamil Nadu, Northeast India. ~ 30,000 in India.
• One-horned Rhinoceros: Kaziranga National Park (Assam) — only 2,500 worldwide, mostly in Assam.
• Lion: Gir Forest, Gujarat — only ~ 600 Asiatic lions in the wild (only place on Earth they exist).
• Snow Leopard: Himalayas (Ladakh, Spiti, Himachal Pradesh, Uttarakhand). Endangered.
• Cheetah: Extinct in India (last sighted 1947). Reintroduced in 2022 from Namibia.
• Indian Bison (Gaur): Western Ghats, Central India.
• Sloth Bear: Central India, Eastern Ghats.
• Indian Wild Ass: Rann of Kutch, Gujarat.
• Indian Pangolin: Various forests; severely poached.
• Birds: Sarus crane, Great Indian bustard, hornbills, Indian roller.
• Reptiles: King cobra, Indian python, mugger crocodile, gharial.

Biodiversity hotspots in India

India contains 4 of the world's 36 biodiversity hotspots:

1. Western Ghats — Sahyadri biodiversity hotspot.
2. Eastern Himalaya — Sikkim, Arunachal Pradesh.
3. Himalayan — Nepal, Bhutan, parts of India.
4. Sundaland — Andaman and Nicobar Islands.

5. Threats to Indian wildlife and vegetation

Habitat loss

• Forest clearance for agriculture.
• Urbanisation — cities expanding into forests.
• Infrastructure — highways, dams, mines fragment habitats.
• Plantations — converting natural forests to teak, eucalyptus, rubber.

Poaching

• Tigers (for skins, bones used in traditional medicine).
• Elephants (for ivory).
• Rhinos (for horn used in folk medicine).
• Pangolins (most trafficked mammal in the world).
• Birds and reptiles (illegal pet trade).

Pollution

• Water pollution kills aquatic life.
• Air pollution affects forests.
• Light pollution disrupts nocturnal animals.
• Pesticides accumulate up the food chain.

Climate change

• Shifting habitats — species can't move fast enough.
• Sea-level rise threatens Sundarbans, coastal mangroves.
• Glacial retreat affects Himalayan species.
• Coral reef bleaching affects marine biodiversity.

Human-wildlife conflict

• Elephants in tea plantations, agricultural areas.
• Tigers and leopards in villages.
• Increasing as forests shrink and humans expand.

Extinct or critically endangered

• Asiatic Cheetah: Extinct in India 1947. Reintroduction from Africa starting 2022.
• Great Indian Bustard: Critically endangered (~ 150 left).
• Indian Vulture: Population collapsed by 99% due to diclofenac (cattle drug). Recovery slow.
• Pink-headed Duck: Possibly extinct (last sighted 1930s).

6. Conservation efforts

Government initiatives

1. Wildlife Protection Act (1972) — protects species, creates sanctuaries, national parks.
2. National Forest Policy (1988) — aims at 33% forest cover.
3. Project Tiger (1973) — saved tigers from near-extinction.
4. Project Elephant (1992) — conserves Asian elephants.
5. Project Rhino — for one-horned rhinos.
6. Project Snow Leopard — Himalayan species.
7. Cheetah Reintroduction Project (2022 onwards).

Protected Areas

Project Tiger — case study

Launched 1973 to save India's tiger population from extinction.

• 1970s: ~ 1,800 tigers left from a 19th-century high of 40,000.
• 2022 census: 3,167 tigers.
• 54 tiger reserves across India.
• India now has 70% of the world's wild tigers.

Project Elephant

• Launched 1992.
• 33 elephant reserves.
• Aimed at ensuring viable populations and ecological corridors.
• India's elephant population: ~ 30,000 (stable).

International cooperation

• CITES (Convention on International Trade in Endangered Species).
• Ramsar Convention for wetlands.
• Convention on Biological Diversity (CBD).

7. Sundarbans — case study

The world's largest mangrove forest. Located in the Ganges-Brahmaputra delta.

• Size: ~ 10,000 sq km (62% in Bangladesh, 38% in India).
• Sundari trees give the name.
• Home to: Royal Bengal Tiger (only mangrove-dwelling tigers in the world), saltwater crocodile, Ganges river dolphin, fishing cat, rhesus macaque, mangrove monkey, ~ 250 bird species, 130 fish species.
• Sundarbans National Park in India + Sundarbans Tiger Reserve.
• UNESCO World Heritage Site (1987).
• Major threats: sea-level rise (Sundarbans is sinking ~ 22 mm/year), salinity increases, cyclones.

8. Closing thought

India's biodiversity is one of its greatest treasures — a heritage built over millions of years, shaped by climate, geography, and the long history of human-wildlife coexistence in this subcontinent.

But this biodiversity is under severe threat:

• Population pressure (1.4 billion humans need land, water, food).
• Economic development (highways, mines, dams).
• Climate change (warming, sea-level rise, monsoon variability).
• Poaching (driven by international markets).

The challenge is INDIA NEEDS BOTH:

• Economic development to lift millions out of poverty.
• Biodiversity conservation to preserve natural heritage.

Reconciling these is the great task of the 21st century. The success of Project Tiger shows it CAN be done — but only with sustained political will, scientific knowledge, and public support.

Every species lost is a piece of India lost — and a warning sign for the entire planet. Studying this chapter is studying the price of progress, and the value of what we still have.