Effects of Spontaneous Fluorescent Polystyrene on Nostocaceae and Daphnia Magna

Abstract

Microplastic pollution is widespread around the world and inevitably comes into contact with organisms. With the accumulation of microplastics in the environment, the negative impact of microplastics on organisms has become the main focus in the field of microplastics. In this study, the different particle and concentration effects of fluorescent polystyrene microplastics (PS-MPs) on Nostocaceae and Daphnia Magna were researched. The results indicate that PS-MPs adhered to Nostocaceae through static electricity, which hindered the absorption of photons and CO2 by Nostocaceae, resulting in a decrease in chlorophyll, a low growth rate and high mortality for Nostocaceae. PS-MPs with very small particles may be integrated into the blood of Daphnia Magna, leading to an increasing trend of mortality and a decrease in spawning rate. The research provides basic data and a reference for the effect of PS-MPs on freshwater organisms and has implications for the further study of microplastics.