Question.
Why are the southern slopes in the Himalayan region covered with thick vegetation cover as compared to the northern slopes of the same hills?
( Chapter - 5 Natural Vegetation and Wildlife, Cass 9 NCERT Contemporary India -I )
Answer.
Precipitation and sunlight are the two major deciding factors for the development of dense vegetation in any region.
There are two main reasons for the dense vegetation on the southern slopes of the Himalayan region as compared to the northern slopes:
- The southern slopes of the Himalayan region receive rainfall from the southwest monsoon. The northern slopes of the Himalayan region do not receive rainfall from the southwest monsoon and receive very little precipitation in the form of snow.
- Since the latitudinal values of the southern slopes of the Himalayan region are lower than those of the northern slopes of the Himalayas, the southern slopes receive more sunlight than the northern slopes of the Himalayas.
Both precipitation and sunlight are more on the southern slopes of the Himalayan region than on the northern slopes, due to which dense vegetation is found on the southern slopes of the Himalayan region.
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