Question
Describe how human activities can disrupt ecosystem balance, using the example of frog harvesting in the 1980s.
✓
Answer
Human activities like over-harvesting disrupt ecosystems by removing key species. In the 1980s, exporting frog legs reduced frog populations, natural pest controllers. This led to more agricultural pests, increased pesticide use, soil and water pollution, and health risks. The imbalance shows how removing a middle trophic level affects prey (pests increase) and predators (e.g., snakes decline), necessitating the export ban to restore balance.
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