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Hot and toxic
Publication . Dias, Marta; Özkan, Busenur; Ramos, João; Marques, António; Rosa, Rui; Costa, Pedro Reis; Maulvault, Ana Luísa; UCIBIO - Applied Molecular Biosciences Unit; MARE - Centro de Ciências do Mar e do Ambiente; Elsevier
Climate change is increasing marine heatwaves (MHWs) frequency and severity worldwide. These extreme events often cause bivalves' mass mortality and facilitate the growth, proliferation and dispersion of toxin-producing microalgae blooms associated with threats to seafood safety. Yet, the interactive effects between MHW and uptake of marine biotoxins by biota are a novel topic still lacking thorough research, from both the ecotoxicological and seafood safety standpoints. This study assessed the effects of a MHW event on the accumulation/elimination dynamics of diarrhetic shellfish toxins in Mytilus galloprovincialis exposed to Prorocentrum lima and the ecotoxicological responses of mussels co-exposed to these two stressors. Results showed that acute exposure to +4 °C reduced toxins accumulation (−49 %) and elimination (−77 %) compared to control temperature. Moreover, exposure to MHW and toxins affected mussels' antioxidant activity, lipid and protein damage, and metabolism in a tissue-specific manner. These findings highlight that M. galloprovincialis can face higher vulnerability to toxins when MHW events strike.
2025-04Artigo científico Acesso aberto Ver mais

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Fundação para a Ciência e a Tecnologia

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Concurso de Projetos de I&D em Todos os Domínios Científicos - 2022

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2022.04136.PTDC

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