Question

Nutrients are required for proper growth of producers in aquatic environment. Excess nutrient will cause

• A. Over growth of producers
• B. Depletion of O${}_2$
• C. Decrease in the number of nektons
• D. All of the above

Answer 1

Answer: (D)

All of the above

Eutrophication, is the ecosystem response to the addition of artificial or natural substances, mainly phosphates, through detergents, fertilisers, or sewage, to an aquatic system. One example is the bloom or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Negative environmental effects include the depletion of oxygen in the water, which may cause death to aquatic animals.

So, the correct answer is option D.