Testing resistance of Daphnia magna in various environments

Environmental pollution is a critical threat to aquatic ecosystems, particularly in regions subjected to industrial and urban pressures. This study examines the application of Daphnia magna as a bio-indicator species for detecting pollution in various Algerian water sources, including desalination water, wastewater, oueds, and industrial effluents. The primary objective is to assess water quality at these key locations by analyzing the effects of different effluents on the life history traits of Daphnia magna . This research is essential for advancing environmental monitoring and pollution assessment, especially as anthropogenic impacts on aquatic ecosystems intensify. Addressing existing knowledge gaps, the study focuses on specific pollutants in Algerian waters and their impact on Daphnia magna . The methodology involves chronic and acute toxicity tests, offering a thorough evaluation of water quality through multiple exposure scenarios. Key findings reveal significant adverse effects of effluents, such as reduced size at first reproduction, decreased longevity, and altered reproductive parameters. These results underscore the pronounced sensitivity of Daphnia magna to pollution, reinforcing its effectiveness in environmental monitoring. The implications suggest that water quality at the studied sites is compromised, with potential consequences for broader aquatic ecosystems, emphasizing the necessity for ongoing, systematic monitoring and intervention.