What makes trout an bioindicator?

Trout are considered bioindicators due to their sensitivity to environmental changes, particularly water quality and habitat conditions. They require clean, oxygen-rich water and are affected by pollutants, temperature fluctuations, and habitat degradation. By monitoring trout populations and health, scientists can assess the overall ecological status of freshwater ecosystems, making them valuable indicators of environmental health. Their presence or absence can signal shifts in ecosystem balance and the impact of human activities.