Investigating the Relationship of Acute Cardiac Effects of Daphnia magna with Chemical Properties of Marine Pollutants

Pollutant inflow from the inland water body is one of the most significant factors affecting marine ecosystems' health status. Common artificial pollutants that arrive at the sea include herbicides, pesticides, detergents, fertilizers, oil, industrial chemicals, and sewage. These chemicals can adversely affect marine organisms. Even though Daphnia mostly lives in freshwater, Daphnia magna is universally thriving worldwide. So, the cardiac effects on Daphnia by the pollutants were deemed to be thoroughly examined for estimating the impact of the chemicals on marine organisms. In this study, Daphnia was exposed to the serially diluted solutions of the ten most inland-spreading pollutants for 30 minutes, and the heartbeat changes after the incubation was measured in bpm. And the change percentages from the incubation were compared with the chemical properties to investigate their relationship. The result showed that the xlogP, rotatable bond count, and heavy atom count were somewhat correlated with the leading coefficients of polynomial functions derived from the heartbeat change graphs. Meanwhile, molecular weight, topological PSA, and complexity were more poorly related. The findings might contribute to developing new chemicals for using on-land environmental management eventually to conserve marine ecology.