5.1.2. Tropical Deciduous Forests

These are the most widespread forests of India. They are also called the monsoon forests and spread over the region receiving rainfall between 200 cm and 70 cm. Trees of this forest type shed their leaves for about six to eight weeks in dry summer.

Tropical deciduous forests are the dominant type of forest found in India, known for their seasonal leaf-shedding behavior. Unlike evergreen forests that maintain their leaves year-round, these forests lose leaves during the dry summer months, allowing them to conserve water. The amount of rainfall received in these regions typically ranges from 200 cm to 70 cm annually, significantly influencing the types of trees and animals that inhabit these forests.

Think of these forests like a wardrobe. In summer, you might put away heavy winter clothes and wear lighter summer clothes to stay comfortable. Similarly, trees in these forests 'put away' their leaves during the dry season to conserve water. Just like how you change your wardrobe based on the season, these trees adapt to seasonal changes.

On the basis of the availability of water, these forests are further divided into moist and dry deciduous. The former is found in areas receiving rainfall between 200 and 100 cm. These forests exist, therefore, mostly in the eastern part of the country — northeastern states, along the foothills of the Himalayas, Jharkhand, West Odisha and Chhattisgarh, and on the eastern slopes of the Western Ghats.

Tropical deciduous forests can be grouped into two main types based on moisture availability: moist deciduous and dry deciduous. Moist deciduous forests, which receive more rainfall (between 200 and 100 cm), tend to be lush and rich in biodiversity, primarily located in the eastern regions of India, including parts of the northeastern states and near the Himalayas. In contrast, dry deciduous forests, which receive less rainfall, are characterized by open stretches and can be found in the Peninsular plateau, as well as in some northern plains.

Imagine how deserts and wetlands are different in terms of plant and animal life due to their water availability. Similarly, moist deciduous forests are rich and green compared to the sparser, more open areas found in dry deciduous forests, just like the lush greenery of a well-watered garden compared to a dry patch of land.

Teak is the most dominant species of this forest. Bamboos, sal, shisham, sandalwood, khair, kusum, arjun, and mulberry are other commercially important species.

Teak is recognized as the most significant tree species in tropical deciduous forests due to its high commercial value and adaptability. Besides teak, other important species include bamboo and several hardwoods like sal and shisham, which provide valuable timber. The diverse types of trees contribute to the ecological balance, provide habitats, and support various wildlife in these forests.

This is similar to a school with different classes and subjects. Teak is like the science class that everyone knows about due to its importance and popularity, while other species like sal and shisham represent the less popular but equally important subjects, all contributing to the overall education system.

In these forests, the common animals found are lion, tiger, pig, deer, and elephant. A huge variety of birds, lizards, snakes, and tortoises are also found here.

Tropical deciduous forests support a rich variety of wildlife. Animals such as lions and tigers are apex predators, while deer and pigs play different roles in the ecosystem as herbivores. The diverse habitats provided by these forests allow for numerous bird species and reptiles to thrive, highlighting the importance of these forests in supporting biodiversity.

You can compare this diversity to a bustling marketplace, where different stalls represent different animal species. Just as each stall has unique items that cater to the needs of various customers, each animal in the forest plays a specific role in maintaining the ecological balance.

A large part of this region has been cleared for cultivation and some parts are used for grazing.

The tropical deciduous forests are under significant threat from human activities. Much of the land has been cleared for agriculture and grazing, which affects the natural habitat and leads to a decline in biodiversity. These practices can disrupt the ecological balance, leading to soil erosion and loss of species diversity.

Think of it as a game where every player has a role. If some players leave the game (like species disappearing), it becomes less fun and chaotic, just as removing trees from a forest can upset the entire ecosystem. This highlights why conservation efforts are crucial to maintaining balance.

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