Question

Which of the following statements about Tropical Evergreen and Semi-Evergreen Forests are correct?

a) They are found in areas with annual precipitation exceeding 200 cm and mean temperature above 22°C.

b) These forests have a well-stratified structure with layers of shrubs, short trees, and tall trees up to 60m.

c) Semi-evergreen forests have a mix of evergreen and moist deciduous trees with evergreen undergrowth.

• A. a, b, c
• B. a, b
• C. b, c
• D. a, c

Answer 1

Answer:

A. a, b, c

Tropical Evergreen and Semi-Evergreen Forests

• Distribution: These forests thrive in regions receiving substantial rainfall, typically exceeding 200 cm annually. The mean annual temperature in these areas remains high, generally above 22°C, creating ideal conditions for dense vegetation growth.

• Structure: Tropical Evergreen Forests exhibit a complex, multi-layered structure. This stratification includes an upper canopy formed by very tall trees, often reaching heights of up to 60 meters. Below this, there are distinct layers of shrubs and shorter trees, contributing to the forest's biodiversity and dense undergrowth.

• Tree Composition: The canopy is dominated by a wide variety of broad-leaved evergreen trees that do not shed their leaves simultaneously, thus maintaining a green appearance throughout the year.

• Semi-Evergreen Forests: These forests represent a transitional type, characterized by a mix of both evergreen and moist deciduous trees. While evergreen species are prevalent, the presence of deciduous trees means some shedding of leaves occurs, though the forest generally retains a green cover. The undergrowth in these forests is often composed of evergreen species.

• Biodiversity: Both types of forests are known for their exceptionally high biodiversity, hosting a vast array of plant and animal species.

• Examples: Significant areas of these forests can be found in the Western Ghats, Northeast India, and the Andaman and Nicobar Islands.