Features of the accumulation of macroplastic on the river bottom in the Mekong delta and the impact on fish and decapods

For the first time, a quantitative assessment of macroplastic pollution was made at the bottom of the rivers of the Mekong basin, and the features of its accumulation and dynamics in bottom sediments and relationship with abundance of fish and decapods were investigated. Sampling of materials for the research was carried out by bottom trawls in the Mekong delta in Vietnam. In this study a significant relationship between the number of animals and the mass of macroplastics was statistically proven for most species of fish and decapods. The substrate, containing a significant amount of plastic fragments, attracted aquatic organisms. All in all, we present results for poorly understood processes of transport, deposition and influence of plastic debris in large rivers in regions of monsoon subequatorial climate and show that more efforts should be dedicated to further unravel potentially complex pathways of the plastic exposure to water ecosystems.

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Karpova, E., E. Abliazov, S. Statkevich, and C.N. Dinh

Publication Date

31 December 2021

Publication Name

Environmental Pollution


Mekong delta, macroplastic, fish, Decapoda, abundance