Question

During heavy rains in a village, the rainwater carried away an excess of nitrogenous compound present in the soil to a pond. The growth of algae and phytoplankton in the pond

• A. Decreases
• B. Decreases but attain normal level after sometime
• C. Increases causing bloom
• D. Remains unchanged

Answer 1

The correct option is C Increases causing bloom

The abundance of the nutrients like phosphate and nitrates or compounds containing both are carried in the rainwater to the water bodies, which results in the enrichment of an ecosystem, resulting in eutrophication. It causes algal bloom (unlimited growth of algae) and growth of other aquatic plants. In extreme conditions, it causes the death of the aquatic flora and fauna due to the depletion of oxygen in the ecosystem.

Thus, the correct answer is option C.