Question

There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon ? 

1. Discharge of nutrients from the estuaries. 

2. Run-off from the land during the monsoon. 

3. Upwelling in the seas. 

 Select the correct answer from the codes given below: 

(a) 1 only (b) 1 and 2 only (c) 2 and 3 only (d) 1, 2 and 3

Answer 1

(d) Algea multiply rapidly when nutrients are present there. So, discharge of nutrients favour algea growth from estuaries to sea. The run off the land during the monsoon bring salts which favours the growth of algea. Upwelling of the sea water from the sea flow brings the nutrients on tap level leading in fast algea multiplication.