Which is a major indicator of water quality studied in Aquatic Ecology?

Dissolved oxygen levels serve as a crucial indicator of water quality in aquatic environments. In most aquatic ecosystems, oxygen is vital for the survival of fish and other aquatic organisms. The concentration of dissolved oxygen (DO) in the water reflects the health of the ecosystem, indicating its capacity to support life. High levels of dissolved oxygen typically signify a healthy, well-functioning ecosystem, while low levels can suggest pollution, excessive organic matter, or eutrophication, which can lead to hypoxic or anoxic conditions where aquatic life cannot survive.

In the context of aquatic ecology, monitoring dissolved oxygen levels helps scientists assess the impact of various environmental factors, including nutrient runoff, temperature changes, and the presence of decomposing organic material. This measurement is essential for conservation efforts and managing water resources effectively, ensuring that aquatic habitats remain viable for diverse forms of life.

While temperature, soil pH, and humidity are also relevant environmental factors, they do not serve as primary indicators of water quality in the same direct way that dissolved oxygen levels do within aquatic ecosystems.