Enhancement of the soil's water-holding capacity
Explanation
Deforestation refers to the permanent removal of trees to make room for something besides forest. Forests play a critical role in regulating the hydrological cycle, maintaining soil structure, sequestering carbon, and supporting biodiversity. The removal of forest cover disrupts these ecological services.
Analysis of Options:
- Increase in global atmospheric temperature is a consequence: Trees act as carbon sinks by absorbing carbon dioxide (CO2) for photosynthesis. Deforestation releases stored carbon and reduces the planet's capacity to absorb atmospheric CO2, contributing to the greenhouse effect and an increase in global atmospheric temperature.
- Enhancement of the soil's water-holding capacity is NOT a consequence: Forest cover improves soil structure through root penetration and the addition of organic matter (humus), which increases soil porosity and water retention. Deforestation leads to soil compaction and erosion, which decreases (rather than enhances) the soil's water-holding capacity.
- Loss of biodiversity and habitat is a consequence: Forests provide shelter and food for a vast array of species. The destruction of forests leads to habitat fragmentation and loss, resulting in a significant decline in biodiversity and the potential extinction of species.
- Aggravation of flood risks is a consequence: Trees intercept rainfall and facilitate the infiltration of water into the ground. Without tree cover, the soil's infiltration rate drops, leading to increased surface runoff. This rapid flow of water into rivers and low-lying areas aggravates flood risks.
Key Takeaway:
Deforestation degrades soil properties, specifically reducing its water-holding capacity and infiltration rate, which accelerates soil erosion and increases the intensity of floods and droughts.