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Natural Vegetation

🎓 Class 11📖 India Physical Environment📖 10 notes🧠 15 Q&A⏱️ ~15 min

Natural Vegetation — Study Notes

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NATURAL VEGETATION

Explanation

NATURAL VEGETATION

Natural vegetation refers to plant communities that have developed naturally over a long period without human interference. These plant species have adapted fully to the prevailing climatic and soil conditions of their region. In India, natural vegetation varies widely due to the country's diverse climate and topography. For example, the Himalayan region features temperate vegetation, while the Western Ghats and Andaman and Nicobar Islands have tropical rainforests. The deltaic regions support tropical forests and mangroves, whereas the desert and semi-desert areas of Rajasthan are characterized by cacti, bushes, and thorny vegetation. The variation in climate, especially rainfall and temperature, along with soil types, influences the distribution and types of vegetation across India. Natural vegetation is distinct from planted vegetation, which is cultivated and maintained by humans, such as in orchards or gardens. The classification of Indian forests is based on common features like predominant vegetation type and climatic conditions, leading to five major forest types: Tropical Evergreen and Semi Evergreen forests, Tropical Deciduous forests, Tropical Thorn forests, Montane forests, and Littoral and Swamp forests.

  • Natural vegetation develops without human interference and adapts to climate and soil.
  • India's vegetation varies from temperate in Himalayas to tropical rainforests in Western Ghats and islands.
  • Desert areas have thorny and cactus vegetation.
  • Classification of Indian forests is based on vegetation type and climate.
  • Five major forest types: Tropical Evergreen & Semi Evergreen, Tropical Deciduous, Tropical Thorn, Montane, Littoral & Swamp forests.
  • 📌 Natural Vegetation: Plant communities developed naturally without human interference.
  • 📌 Climatic Conditions: Weather patterns influencing vegetation types.
  • 📌 Soil Conditions: Soil characteristics affecting plant growth.

TYPES OF FORESTS

Explanation

TYPES OF FORESTS

Indian forests are classified into five major types based on climatic conditions and predominant vegetation characteristics. These types reflect the diversity of India's climate and topography. The five major forest types are: (i) Tropical Evergreen and Semi Evergreen forests, (ii) Tropical Deciduous forests, (iii) Tropical Thorn forests, (iv) Montane forests, and (v) Littoral and Swamp forests. Each type is adapted to specific rainfall, temperature, and soil conditions. Tropical Evergreen forests thrive in warm, humid regions with high rainfall, while Tropical Deciduous forests are found in areas with moderate rainfall and distinct dry seasons. Thorn forests occur in arid and semi-arid regions with low rainfall. Montane forests exist in mountainous areas where temperature decreases with altitude, causing changes in vegetation. Littoral and Swamp forests are found in wetland habitats, including coastal and deltaic regions. Understanding these forest types is crucial for forest management, conservation, and sustainable use of forest resources in India.

  • Five major forest types in India based on climate and vegetation.
  • Tropical Evergreen forests found in warm, humid, high rainfall areas.
  • Tropical Deciduous forests occur in moderate rainfall zones with dry seasons.
  • Tropical Thorn forests grow in arid, low rainfall regions.
  • Montane forests vary with altitude in mountainous regions.
  • Littoral and Swamp forests are associated with wetlands and coastal areas.
  • 📌 Tropical Evergreen Forests: Dense forests with tall trees, found in high rainfall areas.
  • 📌 Tropical Deciduous Forests: Forests shedding leaves in dry season, widespread in India.
  • 📌 Tropical Thorn Forests: Sparse forests with thorny plants in arid regions.

Tropical Evergreen and Semi Evergreen Forests

Explanation

Tropical Evergreen and Semi Evergreen Forests

Tropical Evergreen forests are found mainly on the western slopes of the Western Ghats, the hills of the northeastern region, and the Andaman and Nicobar Islands. These forests flourish in warm, humid areas with an annual precipitation of over 200 cm

Practice Questions — Natural Vegetation

Includes NCERT exercise questions with answers

Q1.Evergreen forest appear green all the year round because:
A.They receive heavy rainfall
B.Found in the hot and humid areas
C.No definite time for trees to shed their leaves
D.Well stratified

Answer:

No definite time for trees to shed their leaves

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Q2.Mangroves grow along the coast in
A.Salt marshes tidal creeks
B.Mountainous areas
C.Western slopes with heavy rainfall
D.Areas of less rainfall less than 50 cm

Answer:

Salt marshes tidal creeks

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Q3.Which region of India has less than 10% of the forest area?
A.North-East
B.South-West
C.North-west
D.South-East

Answer:

North-west

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Q4.Forest area is calculated on the basis of the records procured by
A.State Revenue Department
B.Forest Survey of India
C.National commission on agriculture
D.National Remote Sensing Institute

Answer:

State Revenue Department

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Q5.Process under which people of landless classes can associate themselves in tree raising:
A.Agro-forestry
B.Urban forestry
C.Community forestry
D.Farm forestry

Answer:

Community forestry

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Q6.Raising and management of trees around urban centres does not include;
A.Green Belt
B.Parks
C.Planting trees on roadsides
D.Waste patches

Answer:

Waste patches

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Q7.The main reason behind declining wildlife is:
A.Industrial advancement lead to exploitation of forest
B.Being predator there are important for ecological development
C.Vital role in economic development
D.Helps in diversity conservation

Answer:

Industrial advancement lead to exploitation of forest

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Q8.Wild life is a great natural Heritage for:
A.International trade
B.Ecological diversity
C.Cultural preservation
D.Biological development

Answer:

Ecological diversity

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