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Microplastic biodegradability dependent responses of plastisphere antibiotic resistance to simulated freshwater-seawater shift in onshore marine aquaculture zones

Environmental Pollution 2023 18 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Qian Zhou, Qian Zhou, Ming Zhang, Xiangliang Pan Xiangliang Pan Qian Zhou, Jun Zhang, Jun Zhang, Xiangliang Pan Xiangliang Pan Xiaonan Wang, Xiangliang Pan Qunkai Fang, Qunkai Fang, Qunkai Fang, Qunkai Fang, Daoyong Zhang, Ming Zhang, Xiangliang Pan Daoyong Zhang, Xiangliang Pan Xiangliang Pan Jun Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Xiangliang Pan Daoyong Zhang, Daoyong Zhang, Xiaonan Wang, Ming Zhang, Ming Zhang, Qian Zhou, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Jun Zhang, Daoyong Zhang, Xiangliang Pan Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiaonan Wang, Daoyong Zhang, Xiaonan Wang, Xiaonan Wang, Xiangliang Pan Xiangliang Pan Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Xiaonan Wang, Daoyong Zhang, Ming Zhang, Daoyong Zhang, Daoyong Zhang, Daoyong Zhang, Xiangliang Pan Xiangliang Pan Daoyong Zhang, Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Ming Zhang, Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Daoyong Zhang, Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Daoyong Zhang, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiaonan Wang, Xiangliang Pan Xiangliang Pan Jun Zhang, Xiangliang Pan

Summary

Antibiotic resistance gene (ARG) dynamics in the plastisphere of biodegradable and non-biodegradable microplastics were tracked through a simulated freshwater-to-seawater shift, finding that water type transitions significantly altered ARG profiles and that microplastic biodegradability influenced ARG responses.

Polymers

PE PET

Study Type Environmental

MPs carrying ARGs can travel between freshwater and seawater due to intensive land-sea interaction in onshore marine aquaculture zones (OMAZ). However, the response of ARGs in plastisphere with different biodegradability to freshwater-seawater shift is still unknown. In this study, ARG dynamics and associated microbiota on biodegradable poly (butyleneadipate-co-terephthalate) (PBAT) and non-biodegradable polyethylene terephthalate (PET) MPs were investigated through a simulated freshwater-seawater shift. The results exhibited that freshwater-seawater shift significantly influenced ARG abundance in plastisphere. The relative abundance of most studied ARGs decreased rapidly in plastisphere after they entered seawater from freshwater but increased on PBAT after MPs entered freshwater from seawater. Besides, the high relative abundance of multi-drug resistance (MDR) genes occurred in plastisphere, and the co-change between most ARGs and mobile genetic elements indicated the role of horizontal gene transfer on ARG regulation. Proteobacteria was dominant phylum in plastisphere and the dominant genera, such as Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Afipia, Gemmobacter and Enhydrobacter, were significantly associated with qnrS, tet and MDR genes in plastisphere. Moreover, after MPs entered new water environment, the ARGs and microbiota genera in plastisphere changed significantly and tended to converge with those in receiving water. These results indicated that MP biodegradability and freshwater-seawater interaction influenced potential hosts and distributions of ARGs, of which biodegradable PBAT posed a high risk in ARG dissemination. This study would be helpful for understanding the impact of biodegradable MP pollution on spread of antibiotic resistance in OMAZ.

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