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Microbial carbon metabolic functions of biofilms on plastic debris influenced by the substrate types and environmental factors

Environment International 2020 114 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Zhilin Liu, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Chengqian Wang, Chengqian Wang, Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Jun Hou, Tanveer M. Adyel Lingzhan Miao, Lingzhan Miao, Jun Hou, Jun Hou, Jun Hou, Jun Hou, Chengqian Wang, Tanveer M. Adyel Jun Hou, Jun Hou, Chengqian Wang, Jun Hou, Jun Hou, Jun Hou, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Zhilin Liu, Liuyan Huang, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Liuyan Huang, Tanveer M. Adyel Lingzhan Miao, Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Lingzhan Miao, Guoxiang You, Jun Hou, Jun Wu, Tanveer M. Adyel Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Tanveer M. Adyel Tanveer M. Adyel Lingzhan Miao, Jun Hou, Tanveer M. Adyel Jun Hou, Zhilin Liu, Jun Wu, Lingzhan Miao, Chengqian Wang, Jun Hou, Guoxiang You, Guoxiang You, Guoxiang You, Jun Hou, Zhilin Liu, Jun Hou, Jun Hou, Guoxiang You, Jun Wu, Lingzhan Miao, Lingzhan Miao, Jun Hou, Tanveer M. Adyel Lingzhan Miao, Tanveer M. Adyel Zhilin Liu, Lingzhan Miao, Lingzhan Miao, Zhilin Liu, Zhilin Liu, Zhilin Liu, Tanveer M. Adyel Tanveer M. Adyel Meng Meng, Guoxiang You, Guoxiang You, Guoxiang You, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Jun Wu, Hao Qu, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Tanveer M. Adyel Jun Hou, Jun Hou, Jun Hou, Jun Hou, Meng Meng, Jun Hou, Zhilin Liu, Liuyan Huang, Jun Hou, Jun Hou, Liuyan Huang, Lingzhan Miao, Lingzhan Miao, Jun Hou, Tanveer M. Adyel Hao Qu, Guoxiang You, Jun Hou, Meng Meng, Liuyan Huang, Hao Qu, Tanveer M. Adyel Jun Hou, Jun Hou, Jun Hou, Guoxiang You, Liuyan Huang, Yue Yu, Tanveer M. Adyel Guoxiang You, Hao Qu, Tanveer M. Adyel Jun Hou, Jun Hou, Tanveer M. Adyel Jun Hou, Tanveer M. Adyel

Summary

Researchers compared the microbial communities growing as biofilms on plastic debris (PVC and polyethylene) versus natural cobblestone surfaces in four Chinese freshwater ecosystems, finding that plastics host higher biomass and distinct carbon metabolism patterns compared to natural surfaces. Environmental factors like water chemistry had a stronger influence on these microbial communities than the type of surface, suggesting that the 'plastisphere' — the unique ecological niche on plastic — interacts with surrounding conditions to shape how carbon cycles in freshwater.

As an artificial type of microbial carrier, plastic debris has been widely detected in freshwater habitats, and the potential impacts of the plastisphere (biofilms colonized on plastics) in aquatic ecosystems have drawn increasing attention. Distinct community compositions and structures of biofilms in plastic and natural substrates have been recorded in freshwater environments. However, the microbial metabolic functioning of the plastisphere was underestimated, especially in freshwater environments. In this study, the effects of substrate types on the carbon metabolic functions of biofilms were studied by in situ cultivation of biofilms on plastics (polyvinyl chloride, PVC and polyethylene, PE) and natural substrate (cobblestone) for 44 days in two rivers (the Niushoushan River and the Qinhuai River) and two lakes (Donghu Lake and Xuanwu Lake). Biofilms on plastics showed higher biomasses than those on natural substrates in all ecosystems. Variations in the micro-structure and compactness of biofilms developed under different substrates were observed from scanning electron microscope and confocal laser scanning microscope image analyses. The carbon metabolic activities of the biofilms evaluated by BIOLOG EcoPlate were different between plastics (PVC and PE) and natural substrate (cobblestone) in the four freshwater ecosystems. In the Niushoushan River, PE-associated biofilms had different capacity in using carbon sources from cobblestone-associated biofilms as illustrated by the Shannon-Wiener diversity index and Shannon evenness index. Additionally, the metabolic functional diversity profiles of biofilms on PVC were significantly different from those on cobblestone in the other three aquatic ecosystems. Moreover, results from variation partitioning analysis suggested that the impact of environmental factors (contribution: 21%) on microbial carbon metabolic functions was much greater than that of substrate types (contribution: 6%). These findings illustrated distinct microbial functions of biofilms inhabited on plastics, and environmental factors play a decisive role in the differentiation and specificity of carbon metabolism of the plastisphere. This study offers new insights that plastics serving as artificial microbial niches have the ability to affect the microbial-mediated carbon cycling process in aquatic ecosystems.

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