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Question
The data given below shows a significant decline in the population of migratory birds in a wetland in Southern India over the last three years.
| Year | Population of Birds | Aquatic Plants (%) | Aquatic area (ha) |
| 2023 | 10,000 | 85 | 350 |
| 2024 | 8000 | 60 | 280 |
| 2025 | 5000 | 45 | 220 |
Based on the above data, interpret two reasons for change in the population of migratory birds.
Short Answer
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Solution
- Habitat Loss: The Aquatic Area decreased from 350 ha to 220 ha, which reduced the area that migratory birds could use for nesting, roosting, and feeding.
- Food Scarcity: The percentage of aquatic plants decreased from 85% to 45%, suggesting that many migratory species’ main food source has been severely reduced.
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