Which of the following is most likely to result from the destruction of wetlands surrounding a river?

• A. Greater biodiversity in the wetland area
• B. Increased flooding downstream
• C. Decreased water temperature in the river
• D. Improved water filtration by the ecosystem

Answer: (B)

Verified step by step guidance

1. Understand the role of wetlands in an ecosystem: Wetlands act as natural sponges that absorb and store excess water during heavy rainfall, reducing the risk of flooding downstream. They also provide habitats for diverse species, contributing to biodiversity, and filter pollutants from water, improving water quality.
2. Analyze the impact of wetland destruction: When wetlands are destroyed, their ability to absorb and store water is diminished. This can lead to increased water flow into rivers during heavy rainfall, causing flooding downstream.
3. Evaluate the options provided: Consider each option in relation to the ecological functions of wetlands. For example, destruction of wetlands would not lead to greater biodiversity, as it removes habitats for many species. Similarly, decreased water temperature or improved water filtration are unlikely outcomes of wetland destruction.
4. Focus on the most likely result: Increased flooding downstream is the most probable consequence of wetland destruction, as the natural water absorption and storage capacity of the ecosystem is lost.
5. Conclude the reasoning: Based on the ecological functions of wetlands and the consequences of their destruction, the correct answer is 'Increased flooding downstream.'