Dissolved oxygen, often referred to as DO, is the oxygen in water that is available to support aquatic organisms like fish and algae. The oxygen in the water can be directly dissolved from the air or …

Objective dissolved oxygen in aquatic systems. A glossary is provided at the end of this document f

oceans is crucial for the organisms and creatures living in it. As the amount of dissolved oxygen drops below normal levels in water bo ies, the water quality is harmed and creatures begin to die off.

This chapter, NFM A6.2, provides guidance and protocols for the measurement of dissolved oxygen, which include the scientific basis of the measurement, selection and maintenance of equipment, …

Objective dissolved oxygen in aquatic systems. A glossary is provided at the end of this document f

BOD directly affects the amount of dissolved oxygen in rivers and streams. The greater the BOD, the more rapidly oxygen is depleted in the stream, because microorganisms are using up the DO.

Salinity refers to the amount of salts dissolved in water. Dissolved salts, such as sodium chloride (NaCl), occupy space in water that would otherwise be available for oxygen molecules (O2) to dissolve in.