D.O. stands for which of the following in aquatic systems?

D.O. stands for Dissolved Oxygen, which is a crucial parameter in aquatic systems. It refers to the amount of oxygen that is present in water, and it is vital for the survival of aquatic organisms such as fish, invertebrates, and aerobic bacteria. High levels of dissolved oxygen are generally beneficial and indicate good water quality, while low levels can lead to hypoxic conditions, negatively impacting aquatic life and leading to ecological imbalances.

Dissolved oxygen is essential for various biochemical processes in water bodies, including respiration in aquatic organisms and the breakdown of organic materials. Monitoring and managing dissolved oxygen levels can be key in assessing the overall health of aquatic ecosystems and in the control of aquatic pests. Understanding the role of dissolved oxygen helps in making informed decisions regarding aquatic pest management practices.