UNKNOWN

This Reprint, titled "Impacts of Environmental Change and Human Activities on Aquatic Ecosystems," assembles cutting-edge research addressing the complex interplay between natural environmental changes and anthropogenic disturbances in freshwater and coastal systems. The featured studies explore topics such as climate change impacts, pollutant transport mechanisms, biodiversity responses, ecological risk assessment, and water quality dynamics. With a global perspective, the contributions span diverse regions-including Chinese river basins, the Nile Delta, and transboundary water systems-offering insights into both site-specific and systemic issues. By highlighting the use of advanced analytical tools such as isotope tracing, bioindicators, and modeling techniques, this Special Issue provides valuable scientific guidance for sustainable aquatic ecosystem management, ecological restoration, and environmental policy-making.