Study Guides/Geography/Thorn Forests
Study Guide · Geography

Tropical Thorn Forests and Scrubs

In Class 9 Geography (Natural Vegetation and Wildlife), forests are classified based on the amount of rainfall they receive. Tropical Thorn Forests and Scrubs are specifically adapted to survive in the harshest, driest regions of India.

Question (Click to Flip)

Why do plants in thorn forests have thick, fleshy stems?

Answer

Some plants (like cactus) have thick, fleshy, succulent stems designed to store water like a sponge whenever it rains, allowing the plant to survive the long, dry summer months.

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Key Facts

The wood of the Babool tree is exceptionally hard and durable, making it historically popular for making the wooden wheels of bullock carts and agricultural tools.

Location and Climate

  • Rainfall: These forests are found in regions that receive extremely low rainfall—less than 70 cm per year.
  • Location in India: They cover the arid and semi-arid areas of north-western India. This includes Rajasthan, Gujarat, parts of Punjab and Haryana, and the dry rain-shadow areas of the Deccan Plateau (Madhya Pradesh, Chhattisgarh, Uttar Pradesh, and Maharashtra).

Characteristics of the Trees

The plants in a thorn forest are masters of survival. They have heavily adapted to conserve water:

  1. Deep Roots: The trees have incredibly long, penetrating roots that go deep into the soil to search for underground water.
  2. Thorns: Instead of broad leaves, they have sharp thorns to protect themselves from grazing animals.
  3. Small Leaves: The leaves are very small, thick, and waxy to minimize water loss through transpiration.
  4. Scattered Growth: The trees do not form a dense canopy. They are widely scattered with large patches of dry grass and scrub between them.

Common Flora and Fauna

  • Trees (Flora): Babool (Acacia), Khair, Keekar, Date Palms (Khajoor), and various Cacti.
  • Animals (Fauna): Because of the harsh environment, you will find tough animals like Camels, Wild Asses (in the Rann of Kutch), Desert Foxes, Chinkara (deer), mice, and snakes.

Questions and Answers

Why do plants in thorn forests have thick, fleshy stems?+

Some plants (like cactus) have thick, fleshy, succulent stems designed to store water like a sponge whenever it rains, allowing the plant to survive the long, dry summer months.

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