Scientists measure levels of dissolved oxygen in water primarily to analyze water quality. Dissolved oxygen (DO) is a crucial indicator of the health of aquatic ecosystems. It is necessary for the survival of fish and other aquatic organisms. Low levels of dissolved oxygen can indicate pollution, excessive organic matter, or eutrophication, which can severely impact the ecosystem and biodiversity. Monitoring DO levels helps scientists assess overall water quality and the potential impact of various environmental and anthropogenic factors on aquatic life.
While dissolved oxygen levels might indirectly relate to other factors like erosion, floods, and point source pollution, its primary role is in assessing and ensuring water quality.