Spatiotemporal dynamics of microplastics in an urban river network area

Fan, Yifan; Zheng, Jinglan; Deng, Ligang; Rao, Wenxin; Zhang, Qiji; Liu, Tong; Qian, Xin

doi:10.1016/j.watres.2022.118116

Cited by 87 publications

(25 citation statements)

References 54 publications

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“…In this study, an accurate and automated quantitative analysis of MPs, laser direct infrared (LDIR) spectroscopy, was used to detect MPs. Compared with traditional techniques, this novel method can effectively identify MPs and enormously reduce artificial misclassification and has been applied in several studies of microplastic contamination in groundwater, 14 soil, 15 intestinal tissue, 16 and human sputum. 17 We collected bronchoalveolar lavage fluid (BALF) and detected MPs in BALF to represent the exposure that penetrates deep into the respiratory tract.…”

Section: Introductionmentioning

confidence: 99%

“…This gap is mainly due to the lack of objective and quantitative assessment methods. Current measurements of internal exposure to MPs are optical techniques such as Fourier-transform infrared (FTIR) spectroscopy ,, and Raman spectroscopy. , MPs detected using these traditional techniques rely on manually selecting and counting each particle, leading to an artificial selection bias in which some suspected MPs are easily missed or overlooked . In addition, MPs in the lung are heterogeneously distributed, making it difficult to investigate more characteristics of MPs (i.e., the quantity and proportion of different types) in the lung from small tissues.…”

Section: Introductionmentioning

confidence: 99%

“…10,12 MPs detected using these traditional techniques rely on manually selecting and counting each particle, leading to an artificial selection bias in which some suspected MPs are easily missed or overlooked. 14 In addition, MPs in the lung are heterogeneously distributed, making it difficult to investigate more characteristics of MPs (i.e., the quantity and proportion of different types) in the lung from small tissues. These crucial issues regarding internal exposure to MPs must be addressed before moving forward on health assessments.…”

Section: Introductionmentioning

confidence: 99%

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Evidence of Microplastics in Bronchoalveolar Lavage Fluid among Never-Smokers: A Prospective Case Series

Qiu

et al. 2023

Environ. Sci. Technol.

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Microplastics (MPs) are abundant in air, but evidence of their deposition in the respiratory tract is limited. We conducted a prospective case series to investigate the deposition of microplastics in bronchoalveolar lavage fluid (BALF) and determine the internal dose of MPs via inhalation. Eighteen never-smokers aged 32−74 years who underwent fiberoptic bronchoscopy with BALF were recruited from Zhuhai, China. Control samples were obtained by performing the same procedure using isotonic saline instead of BALF. Laser direct infrared spectroscopy combined with scanning electron microscopy detected the presence and characteristics of MPs and quantitatively analyzed the microplastic in BALF and control samples. Concentrations of total and specific MPs in BALF and control samples were compared using the Wilcox test. Thirteen types of MPs were observed in 18 BALF samples. Polyethylene (PE, 86.1%) was the most abundant in BALF, followed by poly(ethylene terephthalate) (PET, 7.5%) and polypropylene (PP, 1.9%). Compared with the control samples, BALF had significantly higher concentrations of PE (median [IQR] of BALF: 0.38 [8.05] N/g), PET (0.26 [0.54] N/g), polyurethane (0.16 [0.24] N/g), PP (0.16 [0.11] N/g), and total MPs (0.91 [6.58] N/g). The presence of MPs in BALF provides novel evidence that MPs penetrate deep into the respiratory tract.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evidence of Microplastics in Bronchoalveolar Lavage Fluid among Never-Smokers: A Prospective Case Series

Qiu

et al. 2023

Environ. Sci. Technol.

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“…More importantly, this is further corroborated by our results that the symbiotic microbiome in urban parks has higher dispersal rates, indicating that homogeneous dispersal can play a profound role in the community assembly in urban settings. This may be due to frequent disturbances (such as human activities) and highly connected river network systems ( Fan et al, 2022 ), which increase the exposure of amphibians to environmental microbes (especially water microbes) and could further increase dispersal rates. However, this may also introduce more new microbial taxa, thereby increasing the speciation, diversification, priority effects and colonization of new species, which may increase stochasticity (such as drift or homogeneous dispersal) ( Vellend, 2010 ; Zhou and Ning, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Urbanization increases stochasticity and reduces the ecological stability of microbial communities in amphibian hosts

et al. 2023

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Urbanization not only profoundly alters landscape profiles, ecosystems and vertebrate faunal diversity but also disturbs microbial communities by increasing stochasticity, vulnerability, biotic homogenization, etc. However, because of the buffering effect of host species, microbial communities are expected to be influenced by both host species and urbanization stresses. Therefore, the impacts of urbanization on animals’ microbial symbionts could be more complex and uncertain. In this study, we quantified the urbanization degree of sampling sites and surveyed the gut and skin microbes of three amphibian host species in different sites in urban parks and nearby villages of Chengdu, Southwest China. Furthermore, a co-occurrence network analysis, the phylogenetic normalized stochasticity ratio and Sloan neutral community models were applied to infer the impact of urbanization on symbiotic microbial communities. For the three host species, urbanization increased the diversity of symbiotic microbes and the number of keystone microbial taxa. However, the negative effects of such increased diversification were evident, as the community stochasticity and co-occurrence network structure vulnerability also increased, while the network structure complexity and stability were reduced. Finally, the community stochasticity had positive associations with the network vulnerability, implying that the existence of many transient symbiotic rare microbial taxa in urban parks makes the symbiotic microbial community structure more fragile. Conclusively, urbanization increased the symbiotic microbial diversity at the cost of community stability; the results provide a new perspective for better understanding the complex triangulated environment–host–microbe relationship.

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“…Furthermore, the symbiotic microbiome in urban parks has higher dispersal rates, indicating that homogeneous dispersal can play a profound role in the community assembly in urban settings. This may be due to frequent disturbances (such as human activities) and highly connected river network systems (Fan et al, 2022), which increase the exposure of amphibians to environmental microbes (especially water microbes) and could further increase dispersal rates. However, this may also introduce more new microbial taxa, thereby increasing the speciation, diversification, priority effects and colonization of new species, which may increase stochasticity (such drift) (Vellend, 2010;Zhou & Ning, 2017).…”

Section: Discussionmentioning

confidence: 99%

Urbanization increases stochasticity and reduces the ecological stability of microbial communities in amphibian hosts

Zhou¹,

Liao

Liu

et al. 2022

Preprint

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Urbanization not only profoundly alters landscape profiles, ecosystems and vertebrate faunal diversity but also disturbs microbial communities by increasing stochasticity, vulnerability, biotic homogenization, etc. However, because of the buffering effect of host species, microbial communities are expected to be influenced by both host species and urbanization stresses; thus, the impacts of urbanization on animals’ microbial symbionts might not be straightforward to understand. In this study, we quantified the urbanization degree of sampling sites and surveyed the gut and skin microbes of three amphibian host species in different sites in urban parks and nearby villages of Chengdu, Southwest China. Furthermore, a co-occurrence network analysis, the phylogenetic normalized stochasticity ratio and Sloan neutral community models were applied to infer the impact of urbanization on symbiotic microbial communities. For the three host species, urbanization increased the diversity of symbiotic microbes and the number of keystone microbial taxa. However, the negative effects of such increased diversification were evident, as the community stochasticity and co-occurrence network structure vulnerability also increased, while the network structure complexity and stability were reduced. Finally, the community stochasticity had positive associations with the network vulnerability, implying that the existence of many transient symbiotic rare microbial taxa in urban parks makes the symbiotic microbial community structure more fragile. Conclusively, urbanization increased the symbiotic microbial diversity at the cost of community stability; the results provide a new perspective for better understanding the complex triangulated environment-host-microbe relationship.

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Spatiotemporal dynamics of microplastics in an urban river network area

Cited by 87 publications

References 54 publications

Evidence of Microplastics in Bronchoalveolar Lavage Fluid among Never-Smokers: A Prospective Case Series

Evidence of Microplastics in Bronchoalveolar Lavage Fluid among Never-Smokers: A Prospective Case Series

Urbanization increases stochasticity and reduces the ecological stability of microbial communities in amphibian hosts

Urbanization increases stochasticity and reduces the ecological stability of microbial communities in amphibian hosts

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