Question
What is an 'algal bloom'? State its cause and any two harmful effects.
✓
Answer
- Algal bloom refers to the excessive growth of planktonic algae in water bodies.
- It is caused by the presence of large amounts of nitrates and phosphates in the water.
- Its harmful effects include:
- Fish mortality and deterioration of water quality
- Some bloom-forming algae are toxic to humans and other animals.
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