Plenty of algal bloom is observed in a pond in your locality. a. Writ

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 (Nitrogen and Phosphorus) in water causes excessive growth of algae. This growth depletes dissolved oxygen in water and imparts distinct colour to the water bodies. The bloom forming algae are extremely toxic and deteriorates water quality resulting in fish mortality. b. Following preventive measures can be carried out: i. Treatment of waste water before it reaches the pond. ii. Integrated waste water treatment. iii. Avoid using NPK fertilisers. iv. Use of organic or biodegradable manure or resort to organic farming.

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 (Nitrogen and Phosphorus) in water causes excessive growth of algae. This growth depletes dissolved oxygen in water and imparts distinct colour to the water bodies. The bloom forming algae are extremely toxic and deteriorates water quality resulting in fish mortality.

b. Following preventive measures can be carried out:

i. Treatment of waste water before it reaches the pond.

ii. Integrated waste water treatment.

iii. Avoid using NPK fertilisers.

iv. Use of organic or biodegradable manure or resort to organic farming.

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