Microplastics in marine mussels, biological effects and human risk of intake: A case study in a multi-stressor environment.

Mar Pollut Bull

ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Department of Population Studies, Laboratory of Ecotoxicology and Ecology (ECOTOX), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; CIIMAR / CIMAR-LA - Interdisciplinary Centre of Marine and Environmental Research

Published: December 2023


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Article Abstract

This study documented seasonal levels of microplastics (MPs) and biomarkers (condition index, neurotoxicity, energy, oxidative stress) in mussels (Mytilus galloprovincialis), and water physico-chemical parameters in the Douro estuary (NE Atlantic coast), and estimated the human risk of MP intake (HRI) through mussels. Mussel stress was determined through the Integrated Biomarker Response (IBR). HRI was estimated from mussel MP concentrations and consumer habits. MPs were mainly micro-fibres (72 %) with varied chemical composition. Seasonal MP means (±SEM) in mussels ranged from 0.111 ± 0.044 (spring) to 0.312 ± 0.092 MPs/g (summer). Seasonal variations of mussel stress (IBR: 1.4 spring to 9.7 summer) and MP concentrations were not related. MeO-BDEs, PBDEs, temperature, salinity and other factors likely contributed to mussel stress variation. HRI ranged from 2438 to 2650 MPs/year. Compared to the literature, MP contamination in mussels is low, as well as the human risk of MP intake through their consumption.

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http://dx.doi.org/10.1016/j.marpolbul.2023.115704DOI Listing

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