Stream ecology is the study of the interactions between living organisms and their environment within freshwater ecosystems such as rivers and streams. Researchers in this field investigate the physical, chemical, and biological factors that influence the health and functioning of stream ecosystems. This includes studying the diversity and abundance of aquatic organisms, the flow of nutrients and energy through the ecosystem, and the impact of human activities on stream health. Understanding stream ecology is important for conservation efforts, water resource management, and maintaining the ecological balance of freshwater environments.