Question

The vegetation of savannah consists of grassland with scattered small trees, but extensive areas have no trees. The forest development in such areas is generally kept in check by one or more or a combination of some conditions. Which of the following are such conditions?

1. Burrowing animals and termites
2. Fire
3. Grazing herbivores
4. Seasonal rainfall
5. Soil properties

Select the correct answer using the code given below.

A. 1 and 2
B. 4 and 5
C. 2, 3 and 4
D. 1, 3 and 5

Answer 1

The correct answer to the question about conditions that prevent forest development in savannas is C. 2, 3, and 4, which are Fire, Grazing herbivores, and Seasonal rainfall, respectively. These elements work together to sustain the balance between grasses and trees typical of the savanna biome.

Step-by-step explanation:

These factors create a balance in savanna ecosystems, allowing for the coexistence of grasses and scattered trees without the progression to closed-canopy forests. Fire plays a crucial role in preventing tree encroachment by burning down saplings and maintaining the dominance of fire-adapted grass species. Grazing herbivores feed on young trees and shrubs, further inhibiting woodland expansion.

Seasonal rainfall patterns contribute to the savanna's distinct ecosystem by supporting grasses that are adapted to such conditions while restricting tree growth due to periods of drought. It is the interplay of these conditions that maintain the characteristic savanna landscape, stopping it from turning into a denser forest biome and promoting diversity in both plant and animal species.