Diversity and succession of microbial communities on typical microplastics in Xincun Bay, a long-term mariculture tropical lagoon.

The abundance of Proteobacteria and Bacteroidetes in seawater was much higher than that on MPs, while the abundance of Actinobacteria, Firmicutes and Chloroflexi on MPs was significantly higher than in seawater. The results of FTIR showed that polyethylene (PE), polystyrene (PS) and polypropylene (PP) were the main components of experimental MPs originating from fishing nets, foams and woven bulk bags (Fig. In the pathways related to metabolism at level 1, the relative abundance of five metabolic pathways at level 2, including Xenobiotics biodegradation and metabolism, was significantly lower on MPs than in seawater, while the relative abundance of Carbohydrate metabolism on MPs was higher than that in seawater. The clear separation between the confidence ellipse of bacterial communities on various types of MPs and seawater suggested that the composition of bacterial communities on MPs differed significantly from that in seawater. [Extracted from the article]