1.

Plenty of algal bloom is observed in a pond in your locality. a) Write what has caused this bloom and how does it affect the quality of water. b) Suggest a preventive measure.

Answer» a) Presence of large amounts of nutrients in water also cause growth of planktonic algae cause algal bloom.
It effects on quality of water in many ways.
1) Deterioration of water quality.
2) Increased fish mortality rate.
c) Some bloom forming algae are toxic to human and animals.
4) Accelerated eutorphication.
1) Avoid excess use of fertilisers and manures on agricultural land.
2) Protecting soil from erosion.
3) Treating sewage to remove the nutrients, nitrogen and phosphorous.
4) Artificial destratification.
5) Biomanipulation


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