GEOLOGY

Detailed explanation-1: -Decomposition also removes oxygen from water. A stream carrying a large quantity of nonliving organic matter, such as a decaying algae bloom or a load of only partially treated sewage, is said to have a high biochemical oxygen demand.

Detailed explanation-2: -Aquatic Life: Animals that live in water consume dissolved oxygen, for example, as bacteria in water decomposes organic material, they consume oxygen. Therefore, when water contains a lot of decomposing material, a drop in DO concentrations is recorded. This process is known as biological oxygen demand (BOD).

Detailed explanation-3: -Causes of Low Dissolved Oxygen This can result in insufficient amounts of dissolved oxygen available for fish and other aquatic life. Die-off and decomposition of submerged plants also contributes to low dissolved oxygen. The process of decomposition is called Carbonaceous Biochemical Oxygen Demand (CBOD).

Detailed explanation-4: -In ocean and freshwater environments, the term “hypoxia” refers to low or depleted oxygen in a water body. Hypoxia is often associated with the overgrowth of certain species of algae, which can lead to oxygen depletion when they die, sink to the bottom, and decompose.