What is the effect of slow water flow on aquatic life?

Slow water flow can significantly impact the levels of dissolved oxygen available to aquatic organisms, which is crucial for their respiration. In stagnant or slow-moving water, oxygen is less readily replenished due to reduced turbulence that typically aids in the mixing and aeration of the water. This can result in a decrease in the level of dissolved oxygen. Many aquatic organisms, such as fish and invertebrates, rely on dissolved oxygen for respiration; hence, a reduction in oxygen levels can slow down their metabolic processes and overall respiration rates. As a consequence, these organisms may experience stress or impaired growth due to insufficient oxygen supply, making them less able to thrive in these conditions.