Correct Option
The correct option isEnhancement of soil fertility
Explanation
Deforestation involves the permanent removal of trees to make room for something besides forest. This alteration significantly impacts the physical environment, including the soil structure, water cycle, and atmospheric composition.
Option Analysis
- Lowering of the groundwater table Lowering of the groundwater table: Trees and their root systems facilitate the percolation of rainwater into the ground. The removal of vegetation increases surface runoff and reduces the rate of groundwater recharge, leading to a decline in the water table. This is a direct consequence.
- Enhancement of soil fertility Enhancement of soil fertility: This is NOT a consequence. Forests maintain soil fertility by adding organic matter (humus) through falling leaves and twigs. The roots also bind the soil, preventing erosion. Deforestation removes the source of humus and exposes the topsoil to wind and water erosion, thereby depleting soil nutrients and reducing fertility.
- Increase in atmospheric carbon dioxide Increase in atmospheric carbon dioxide: Trees act as carbon sinks, absorbing carbon dioxide (CO2) for photosynthesis. When forests are cleared, this absorption stops, and the carbon stored in the trees is released back into the atmosphere (especially if the wood is burned or decomposes), contributing to the greenhouse effect. This is a direct consequence.
- Disruption of the ecological balance Disruption of the ecological balance: Forests provide habitats for a vast array of species. Deforestation destroys these habitats, disrupts food chains, and leads to a loss of biodiversity, thereby destabilizing the ecological balance. This is a direct consequence.
Key Takeaway: Deforestation leads to soil degradation through erosion and loss of organic matter, rather than the enhancement of soil fertility. It negatively impacts the water cycle, atmospheric composition, and biodiversity.