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Mangrove degradation retarded microplastics weathering and affected metabolic activities of microplastics-associated microbes

Journal of Hazardous Materials 2022 60 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.

Yuanyuan Zhao, Yuanyuan Zhao, Hui Deng, Yuanyuan Zhao, Hui Deng, Hui Deng, Hui Deng, Chengjun Ge, Yuanyuan Zhao, Qianqian Fu, Jianxiong He, Qianqian Fu, Dan Feng, Dan Feng, Qianqian Fu Qianqian Fu Yuqing Zhang, Dazhen Li, Jianxiong He, Dan Feng, Yuqing Zhang, Dazhen Li, Dazhen Li, Yuanyuan Zhao, Hui Deng, Yuanyuan Zhao, Hui Deng, Dan Feng, Dan Feng, Dazhen Li, Dazhen Li, Dazhen Li, Chengjun Ge, Chengjun Ge, Chengjun Ge, Yuanyuan Zhao, Qianqian Fu, Qianqian Fu Dazhen Li, Dazhen Li, Yuqing Zhang, Hui Deng, Hui Deng, Chengjun Ge, Jianxiong He, Dan Feng, Dan Feng, Dan Feng, Hui Deng, Huamei Yu, Yuanyuan Zhao, Yuanyuan Zhao, Dan Feng, Jianxiong He, Jianxiong He, Jianxiong He, Huamei Yu, Jianxiong He, Jianxiong He, Hui Deng, Yuanyuan Zhao, Chengjun Ge, Chengjun Ge, Dan Feng, Dan Feng, Dan Feng, Huamei Yu, Huamei Yu, Huamei Yu, Yuanyuan Zhao, Dan Feng, Huamei Yu, Chengjun Ge, Dan Feng, Huamei Yu, Yuanyuan Zhao, Yuanyuan Zhao, Chengjun Ge, Chengjun Ge, Huamei Yu, Huamei Yu, Hui Deng, Chengjun Ge, Huamei Yu, Chengjun Ge, Yuqing Zhang, Huamei Yu, Huamei Yu, Huamei Yu, Huamei Yu, Chengjun Ge, Huamei Yu, Chengjun Ge, Huamei Yu, Huamei Yu, Huamei Yu, Chengjun Ge, Chengjun Ge, Huamei Yu, Huamei Yu, Chengjun Ge, Yuanyuan Zhao, Chengjun Ge, Qianqian Fu, Chengjun Ge, Qianqian Fu

Summary

Microplastic weathering was slower in degraded mangrove sediments than in intact mangroves, with degradation also altering the composition and metabolic activity of microplastic-associated microbial communities. The findings suggest mangrove ecosystem health influences how rapidly microplastics degrade and what ecological roles microplastic-associated microbes play in these coastal environments.

Polymers

PE PLA PS

Study Type Environmental

Currently, information on microplastics (MPs) weathering characteristics and ecological functions driven by MPs-associated microbes in mangrove ecosystems remains unclear, especially in the degraded areas. Herein, we compared the weathering characteristics of MPs in both undegraded and degraded mangrove sediments, and then explored the potential interactions between their weathering characteristics and microbially-driven functions. After 70 days of incubation, different MPs (including polyethylene PE, polystyrene PS, and polylactic acid PLA) were strongly weathered in mangrove sediments, with significant erosion features. Interestingly, more obvious weathering characteristics were found for MPs in the undegraded mangrove sediments. O/C ratio value of MPs in the undegraded sediments was 2.3-3.0 times greater than that in the degraded ones. Besides, mangrove degradation reduced network complexity among MPs-associated microorganisms and affected their metabolic activities. Bacteria involved in carbon cycle process enriched on nondegradable MPs, whereas abundant bacteria responsible for sulphur cycle were observed on PLA-MPs. Moreover, these relevant bacteria were more abundant on MPs in the undegraded mangrove sediments. Mangrove degradation could directly and indirectly affect MPs weathering process and microbially-driven functions through regulating sediment properties and MPs-associated microbes. During weathering, contact angle and roughness of MPs were key factors influencing the colonisation of hydrocarbon degradation bacteria on MPs.

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