Microplastic abundance and accumulation behavior in Lake Onego sediments: a journey from the river mouth to pelagic waters of the large boreal lake

Zobkov, Mikhail; Belkina, Natalia; Kovalevski, Vladimir V.; Zobkova, Maria; Ефремова, Т. Т.; Galakhina, Natalia

doi:10.1016/j.jece.2020.104367

Cited by 44 publications

(16 citation statements)

References 51 publications

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“…These are common properties of muddy sediments found in low current zones such as profundal zones of lakes 45 and reservoirs 46 , oceanic basins (Baltic Sea 47 ) or river estuaries. Recent studies showed that microplastics are often deposited in such low flow zones, making muddy sediments a likely depository of these anthropogenic particles 48 . In comparable deep-sea sediments from the Rockall Trough, microplastics were found in undisturbed layers with an approximate age of > 150 years 49 .…”

Section: Discussionmentioning

confidence: 99%

Burial of microplastics in freshwater sediments facilitated by iron-organo flocs

Leiser

Schumann

Dadi

et al. 2021

Sci Rep

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Microplastics are ubiquitous in standing freshwater bodies, consequently lakes and reservoirs may be important sinks for these contaminants. However, the mechanisms governing the deposition of microplastics and their interactions with the sediments are understudied. We demonstrate how aggregation-based transport facilitates the sinking and infiltration of buoyant microplastics into freshwater reservoir sediments by employing experiments with intact sediment cores. Buoyant polyethylene microplastics were rapidly (1–4 h) incorporated into sinking iron-organic aggregates, followed by swift deposition into sediments. Ingression of microplastic bearing flocs into sediments was completed within 6 days and led to stable deposition of the incorporated particles for at least 2 months. Most microplastics were deposited in the top 2 cm of the sediments and few particles (5–15%) were re-released into the water. Our results show at least 85% burial of microplastics, indicating the significant role of freshwaters with low flow velocities in reducing microplastic loads to the oceans.

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Section: Discussionmentioning

confidence: 99%

Burial of microplastics in freshwater sediments facilitated by iron-organo flocs

Leiser

Schumann

Dadi

et al. 2021

Sci Rep

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“…As a result, the estimated concentration of fragments in the sediments is 1000 times lower than in the experiment. The microplastic size considered by Zobkov et al (2020) was >174 μm, which includes the mean size of PPs used in treatments >250 and 250-100 μm (Table 1). The last one showed the highest consumption rate, 2 × 10 −5 (individuals × day) −1 (Figure 2), which we can use as a maximum estimate.…”

Section: Discussionmentioning

confidence: 99%

“…It is also known that microplastic abundance increases exponentially with a decrease in their size (Song et al, 2017), and the actual consumption of microplastics of smaller size fraction in the wild can be significantly higher than that calculated in the present study. Moreover, in other areas of Lake Onego, microplastics of fibrous type prevailed among other forms and achieved approximately 61% of the total microplastic content (Zobkov et al, 2020). Fibers are thin filaments, which can remain in the water column for a long time, and their consumption rate can differ significantly from the consumption rate of fragments.…”

Section: Discussionmentioning

confidence: 99%

“…Taking into account the ability of crustaceans to ingest microplastics (Sorrentino & Senna, 2021), the large biomass of G. fasciatus in the littoral zone (Ryabinkin & Polyakova, 2008; Sidorova & Kalinkina, 2015), the active role of G. fasciatus in fish food (Georgiev et al, 2019), and the high rate of sediment contamination with microplastics (Zobkov et al, 2020), it can be assumed that this species can be a sound factor in the movement of microplastics from the littoral zone, where they originate, to the pelagic part of the lake. However, the ability of G. fasciatus to ingest microplastics and its intensity, as well as the microplastic size ranges preferred by this species, remain unknown.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Microplastic Size Range and Ingestion Intensity by Gmelinoides fasciatus Stebbing, an Invasive Species of Lake Onego

Kalinkina

Zobkov

Zobkova

et al. 2021

Enviro Toxic and Chemistry

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To indicate the potential role of Gmelinoides fasciatus, an invasive species of Lake Onego, in the inclusion of microplastics into food webs, several indicators were evaluated: its ability to ingest microplastics, the preferred size ranges, and the ingestion intensity. For this purpose, irregularly shaped polystyrene copolymer particles (acrylonitrile butadiene styrene plastics, artificially crushed) of four size classes (<50, 50-100, 100-250, >250 µm) were used. Gmelinoides fasciatus actively ingested microplastic particles, and in treatment with particles of 100-250 µm in size, the consumption rate was the highest. The crustaceans that survived the experiment ingested smaller particles than the deceased ones. Based on the size-frequency distributions of the ingested particles and the same in the suspension, crustaceans preferred smaller particles than those in suspension. The mean size of the ingested particles was 100 ± 5 µm. However, considering the actual concentration of microplastic fragments in the sediments of Lake Onego, in natural conditions, a negative effect of microplastic fragments on the G. fasciatus population is unlikely. At the same time, the ability of the invasive species G. fasciatus to consume microplastics and their active integration into the food webs of Lake Onego through consumption by fish can be considered reliable factors of the entry of microplastics in the fish of Lake Onego.

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“…In Lake Baikal, high levels of microplastic pollution have been identified in the water near tourist areas and coastal settlements [32]. Significant concentrations of microplastics in bottom sediments have been found within Onega, one of Europe's largest lakes, even higher than in the Baltic Sea [33]. Runoff of the Great Siberian Rivers contributes significantly to the microplastics pollution of the Arctic Seas [34].…”

Section: Introductionmentioning

confidence: 99%

Microplastic Pollution in the Surface Waters from Plain and Mountainous Lakes in Siberia, Russia

Malygina

Mitrofanova

Kuryatnikova

et al. 2021

Water

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Microplastics (MPs) contaminations of freshwater and marine environments has become a global issue. Lakes in southern Siberia provide a wide range of ecosystem services and are essential elements in the annual and interannual runoff distribution of the Great Siberian Rivers. However, the extent of their MPs pollution remains unknown. In this paper, for the first time, we analyze the concentrations, composition, and spatial distribution of MPs in six lakes in southern Siberia. The studied lakes are located both in the Altai mountains and the West Siberian plain. Some of them are significantly impacted by human activities, while others are located in protected areas with no permanent population. Nevertheless, MPs were detected in all of the studied lakes. MPs concentrations ranged from 4 to 26 MPs L−1. Comparing with other inland lakes, South Siberian lakes presented moderate MPs concentrations. Among the registered MPs forms, fragments and films were dominant, with a size range between 31 and 60 nm. The MPs’ sources depend on local human activities (fishing, transport, landfilling). Therefore, sufficiently high concentrations were observed even in remote lakes. The present study set a baseline that emphasizes the need for increased attention to waste management and sustainable water use in Siberian freshwater environments.

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Microplastic abundance and accumulation behavior in Lake Onego sediments: a journey from the river mouth to pelagic waters of the large boreal lake

Cited by 44 publications

References 51 publications

Burial of microplastics in freshwater sediments facilitated by iron-organo flocs

Burial of microplastics in freshwater sediments facilitated by iron-organo flocs

Assessment of Microplastic Size Range and Ingestion Intensity by Gmelinoides fasciatus Stebbing, an Invasive Species of Lake Onego

Microplastic Pollution in the Surface Waters from Plain and Mountainous Lakes in Siberia, Russia

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