What is the consequence of increasing BOD in water bodies?

Increasing biochemical oxygen demand (BOD) in water bodies is primarily associated with the decomposition of organic materials, which consumes dissolved oxygen from the water. As BOD rises, it indicates a higher quantity of organic matter available for microorganisms to break down. This process leads to the depletion of dissolved oxygen, which is essential for the survival of aerobic aquatic organisms, such as fish and invertebrates.

When dissolved oxygen levels drop significantly, it creates conditions known as "dead zones," where aquatic life cannot survive. This can result in a decline in fish populations, alteration of species compositions, and overall disruption of the aquatic ecosystem. In extreme cases, oxygen depletion can lead to fish kills and a reduction in biodiversity, making it a critical environmental concern for water quality management. Thus, understanding the implications of high BOD is vital for maintaining healthy aquatic environments.