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Occurrence, transport, and toxicity of microplastics in tropical food chains: perspectives view and way forward

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Abstract

Microplastics, which have a diameter of less than 5 mm, are becoming an increasingly prevalent contaminant in terrestrial and aquatic ecosystems due to the dramatic increase in plastic production to 390.7 million tonnes in 2021. Among all the plastics produced since 1950, nearly 80% ended up in the environment or landfills and eventually reached the oceans. Currently, 82–358 trillion plastic particles, equivalent to 1.1–4.9 million tonnes by weight, are floating on the ocean's surface. The interactions between microorganisms and microplastics have led to the transportation of other associated pollutants to higher trophic levels of the food chain, where microplastics eventually reach plants, animals, and top predators. This review paper focuses on the interactions and origins of microplastics in diverse environmental compartments that involve terrestrial and aquatic food chains. The present review study also critically discusses the toxicity potential of microplastics in the food chain. This systematic review critically identified 206 publications from 2010 to 2022, specifically reported on microplastic transport and ecotoxicological impact in aquatic and terrestrial food chains. Based on the ScienceDirect database, the total number of studies with “microplastic” as the keyword in their title increased from 75 to 4813 between 2010 and 2022. Furthermore, various contaminants are discussed, including how microplastics act as a vector to reach organisms after ingestion. This review paper would provide useful perspectives in comprehending the possible effects of microplastics and associated contaminants from primary producers to the highest trophic level (i.e. human health).

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No datasets were generated or analysed during the current study.

Abbreviations

EC50 :

Half maximal effective concentration

δ15N:

Nitrogen isotopic composition

δ13C:

Carbon isotopic composition

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Acknowledgements

We would like to acknowledge that the figures were created using Biorender application.

Funding

Navish Kataria would like to gratefully acknowledge the funding support as seed grant award (Letter No. R&D/SG/2020-21/169) by J C Bose University, YMCA, Faridabad, Haryana (India) and UGC Startup Grant (Letter No. No.F.30-589/2021 BSR) by UGC, New Delhi for the research work.

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NK: Writing—Original Draft, Formal analysis, Investigation; Methodology; Visualization; Funding acquisition. SY: Writing-review and editing, Visualization, Validation. VKG: Writing-review and editing. ERR: Writing-review and editing. JJJ: Writing-review and editing. PKR: Writing-review and editing. MK: Writing-review and editing. KSK: Writing-review and editing; Validation; Supervision. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Kuan Shiong Khoo.

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Kataria, N., Yadav, S., Garg, V.K. et al. Occurrence, transport, and toxicity of microplastics in tropical food chains: perspectives view and way forward. Environ Geochem Health 46, 98 (2024). https://doi.org/10.1007/s10653-024-01862-2

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  • DOI: https://doi.org/10.1007/s10653-024-01862-2

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