Question

Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?

Answer 1

1. Organic matter such as leaves, grass, trash can pollute water. Microorganisms present in water can decompose this organic matter and consume dissolved oxygen in water.
2. Eutrophication is a process by which water bodies receive excess nutrients that stimulates excessive plant growth. This enhanced plant growth in water bodies is called algal bloom.
3. The growth of algae in extreme abundance covers the water surface and reduces the oxygen concentration in water. Thus, bloom-infeded water inhibits the growth of others. living organisms in the water body.
4. This process in which the nutrient-rich water support a dense plant population kills animal life by depriving it of oxygen and results in loss of biodiversity is known as eutrophication.