Question

A lake with an inflow of domestic sewage rich in organic waste may result in:

• A. Drying of the lake very soon due to algal bloom
• B. An increased production of fish due to a lot of nutrients
• C. Death of fish due to lack of oxygen
• D. Oxygen supply of lake increasing drastically

Answer 1

Answer: (A), (C)

Death of fish due to lack of oxygen

Eutrophication is the excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life. One of the negative impacts of eutrophication and increased algal growth is a loss of available oxygen, known as anoxia. These anoxic conditions can kill fish and other aquatic organisms such as amphibians living in the water bodies.