Vertical microplastic distribution in sediments of Fuhe River estuary to Baiyangdian Wetland in Northern China

Zhou, Zeyan; Zhang, Panyue; Zhang, Guangming; Wang, Siqi; Cai, Yajing; Wang, Hongjie

doi:10.1016/j.chemosphere.2021.130800

Cited by 80 publications

(18 citation statements)

References 54 publications

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“…Currently, there is no consistent way to measure MP concentration, and differences from areal concentrations to mass-based concentrations are common. MP concentrations in the field are often variable, sites with concentration spikes are associated with the in-situ breakdown of larger plastic items 9 , 54 , 55 . The range of MP used in our treatments reflects both the variation between sites but also the potential extreme values within sites associated with spatial and temporal dynamics 56 – 58 .…”

Section: Discussionmentioning

confidence: 99%

Modelled broad-scale shifts on seafloor ecosystem functioning due to microplastic impacts on bioturbation

You,

Della Penna,

Thrush

2023

Sci Rep

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Bioturbating species play an essential role in regulating nutrient cycling in marine sediments, but their interaction with microplastics (MP) remains poorly understood. Here we investigated the linkage between MP and ecosystem functioning using experimental observations of luminophore distribution in the sediment to parametrize bioturbation coefficients (Db). this information as fed into a simplified transport-reaction model, allowing us to upscale our experimental results. We found that the composition of bioturbators modulated shifts in the ecosystem functioning under microplastic stress. Maldanid worms (Macroclymenella stewartensis), functionally deep burrowing and upward-conveyor belt feeders, became less active. The Db of M. stewartensis reduced by 25% with the addition of 0.002 g MP cm−2 at surface sediment, causing accumulation of organic matter in the oxic sediment zone and stimulating aerobic respiration by 18%. In contract, the tellinid bivalve Macomona liliana, functionally a surface -deposit feeder that excretes at depth, maintained particle mixing behaviour in MP-contaminated systems. This study provides a mechanistic insight into the impacts of MP and indicates that the functional role of bioturbating species should be involved in assessing the global impact of MP. The model allowed us to understand the broad-scale impact of MP on seafloor habitat.

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Section: Discussionmentioning

confidence: 99%

Modelled broad-scale shifts on seafloor ecosystem functioning due to microplastic impacts on bioturbation

You,

Della Penna,

Thrush

2023

Sci Rep

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“…While some of the studies have exhibited the prevalence of fragments as the predominant form of MPs (Zhang et al, 2017), the presence of a variety of MP shapes in the marine environment can be influenced by the source of MPs (Joshi et al, 2024). Fishing activities, clothing fibers, and commercial influents were considered preliminary sources of MPs in the ocean (Zhou et al, 2021). It was estimated that a single wash of cloth was capable of releasing >1900 fibers into the water (Browne et al, 2011).…”

Section: Shapesmentioning

confidence: 99%

An assessment of microplastic contamination in beach sediment of Maharashtra State, India, with special reference to anthropogenic activities

Shinde,

Rabari,

Duggal

et al. 2024

Water Environment Research

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The escalating issue of microplastic (MP) pollution poses a significant threat to the marine environment due to increasing plastic production and improper waste management. The current investigation was aimed at quantifying the MP concentration on 25 beaches on the Maharashtra coast, India. Beach sediments (1 kg) were collected from each site, with five replicates to evaluate the extent of MPs. The samples were homogenized, and three 20 g replicas were prepared for subsequent analysis. Later, the samples were sieved, and MPs were extracted using previously published protocols. The abundance of MPs found as 1.56 ± 0.79 MPs/g, ranges from 0.43 ± 0.07 to 3 ± 0.37 MPs/g. Fibers were found as the most abundant shape of MPs. Size‐wise classification revealed dominance of <1 mm and 1–2 mm‐sized MPs. Blue‐ and black‐colored MPs were recorded dominantly. Polymer identification of MPs revealed polyurethane, polypropylene, polyvinyl chloride, acrylic or polymethyl methacrylate, and rubber. The findings revealed that MPs were found to be higher at highly impacted sites, followed by moderately impacted sites and low‐impacted sites, possibly due to a different degree of anthropogenic pressure. The study recommended the urgent need for effective policy to prevent plastics accumulation in the coastal environment of Maharashtra State, India.Practitioner Points The study investigated the abundance and distribution of microplastics in the marine environment, specifically in sediments. The most common type of microplastic found was fibers, followed by fragments and films. Microplastics were found to pose a potential risk to the marine ecosystem, although further research is needed to fully understand their ecological impact. Future research should focus on expanding the sample size, assessing long‐term effects, exploring sources and pathways, and considering size and shape of microplastics. The findings recommended urgent action to mitigate plastic pollution in Maharashtra coast.

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“…For sediment sampling from depth, a columnar sampler (inner diameter = 7 cm, height = 100 cm) is required. 51 Corer-based methods are also preferable when the bottom of the water bodies is hard, leading to the malfunction of grab-based methods, which cannot close efficiently. 56 However, corer-based methods are ineffective when the risk of core freezing is high.…”

Section: Samplingmentioning

confidence: 99%

Preservation, storage, and sample preparation methods for freshwater microplastics – a comprehensive review

Nayebi

Khurana

Pulicharla

et al. 2023

Environ. Sci.: Adv.

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Vertical microplastic distribution in sediments of Fuhe River estuary to Baiyangdian Wetland in Northern China

Cited by 80 publications

References 54 publications

Modelled broad-scale shifts on seafloor ecosystem functioning due to microplastic impacts on bioturbation

Modelled broad-scale shifts on seafloor ecosystem functioning due to microplastic impacts on bioturbation

An assessment of microplastic contamination in beach sediment of Maharashtra State, India, with special reference to anthropogenic activities

Preservation, storage, and sample preparation methods for freshwater microplastics – a comprehensive review

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