Browsing by Author "Regoli, Francesco"
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- Are mixtures of micro/nanoplastics more toxic than individual micro or nanoplastic contamination in the clam ruditapes decussatus?Publication . Ventura, Emma; Ribeiro Gonçalves, Joanna Melissa; Vilke, Juliano Marcelo; d'Errico, Giuseppe; Benedetti, Maura; Regoli, Francesco; Bebianno, MariaThe abundance of micro (MPs) and nano (NPs) sized plastic particles in the ocean is concerning due to their harmful effects on marine life. The interactions between MPs and NPs in the marine environment and their impact on marine biota remain not fully understood. This study contributes with new insights into the interaction between polystyrene NPs (PSNPs) and polyethylene MPs (PEMPs) on the clam Ruditapes decussatus . Results showed ingestion of MPs and NPs by clams, with PSNPs demonstrating higher toxicity in hemolymph. While no genotoxicity was observed, clams treated with MPs and the mixture showed increased acetylcolinesterase (AchE) activity over time. Additionally, the antioxidant defense system mitigated oxidative stress, suggesting effective neutralization of reactive oxygen species. Hazard assessment indicated the greatest impact on clam digestive glands after ten days of exposure, with an antagonistic interaction between MPs and NPs noted.
- Environmental hazard assessment of a marine mine tailings deposit site and potential implications for deep-sea miningPublication . Mestre, Nélia; Rocha, Thiago L.; Canals, Miquel; Cardoso, Cátia; Danovaro, Roberto; Dell’Anno, Antonio; Gambi, Cristina; Regoli, Francesco; Sanchez-Vidal, Anna; Bebianno, Maria JoãoPortmán Bay is a heavily contaminated area resulting from decades of metal mine tailings disposal, and is considered a suitable shallow-water analogue to investigate the potential ecotoxicological impact of deep-sea mining. Resuspension plumes were artificially created by removing the top layer of the mine tailings deposit by bottom trawling. Mussels were deployed at three sites: i) off the mine tailings deposit area; ii) on the mine tailings deposit beyond the influence from the resuspension plumes; iii) under the influence of the artificially generated resuspension plumes. Surface sediment samples were collected at the same sites for metal analysis and ecotoxicity assessment. Metal concentrations and a battery of biomarkers (oxidative stress, metal exposure, biotransformation and oxidative damage) were measured in different mussel tissues. The environmental hazard posed by the resuspension plumes was investigated by a quantitative weight of evidence (WOE) model that integrated all the data. The resuspension of sediments loaded with metal mine tails demonstrated that chemical contaminants were released by trawling subsequently inducing ecotoxicological impact in mussels' health. Considering as sediment quality guidelines (SQGs) those indicated in Spanish action level B for the disposal of dredged material at sea, the WOE model indicates that the hazard is slight off the mine tailings deposit, moderate on the mine tailings deposit without the influence from the resuspension plumes, and major under the influence of the resuspension plumes. Portmán Bay mine tailings deposit is a by-product of sulphide mining, and despite differences in environmental setting, it can reflect the potential ecotoxic effects to marine fauna from the impact of resuspension of plumes created by deep-sea mining of polymetallic sulphides. A similar approach as in this study could be applied in other areas affected by sediment resuspension and for testing future deep-sea mining sites in order to assess the associated environmental hazards.
- Insights on ecotoxicological effects of microplastics in marine ecosystems: the EPHEMARE ProjectPublication . Regoli, Francesco; Albentosa, Marina; Avio, Carlo Giacomo; Batel, Annika; Bebianno, Maria; Begout, Marie-Laure; Beiras, Ricardo; Bellas, Juan; Blust, Ronny; Bour, Agathe; Braunbeck, Thomas; Cachot, Jerome; Carteny, Camilla Catarci; Cormier, Bettie; Cousin, Xavier; Cuesta, Alberto; Angeles Esteban, Maria; Faimali, Marco; Gambardella, Chiara; Garaventa, Francesca; Gorbi, Stefania; Guilhermino, Lucia; Hylland, Ketil; Keiter, Steffen H.; Kopke, Kathrin; Morin, Benedicte; Pacheco, Alexandre; Pittura, Lucia; Town, Raewyn M.; Vieira, Luis R.; Cocca, M; DiPace, E.; Errico, M. E.; Gentile, G; Montarsolo, A.; Mossotti, R.; Avella, M.
- Looking beyond the obvious: the ecotoxicological impact of the leachate from fishing nets and cables in the marine mussel Mytilus galloprovincialisPublication . Vilke, Juliano Marcelo; GARCIA DA FONSECA, TAINÁ; Dias de Alkimin, Gilberto; Ribeiro Gonçalves, Joanna Melissa; Edo Cuesta, Carlos; d’ Errico, Giuseppe; Seilitz, Fredric Södergren; Rotander, Anna; Benedetti, Maura; Regoli, Francesco; Lüchmann, Karim H.; Bebianno, MariaOnce in the marine environment, fishing nets and cables undergo weathering, breaking down into micro and nano -size particles and leaching plastic additives, which negatively affect marine biota. This study aims to unravel the ecotoxicological impact of different concentrations of leachate obtained from abandoned or lost fishing nets and cables in the mussel Mytilus galloprovincialis under long-term exposure (28 days). Biochemical biomarkers linked to antioxidant defense system, xenobiotic biotransformation, oxidative damage, genotoxicity, and neurotoxicity were evaluated in different mussel tissues. The chemical nature of the fishing nets and cables and the chemical composition of the leachate were assessed and metals, plasticizers, UV stabilizers, flame retardants, antioxidants, dyes, flavoring agents, preservatives, intermediates and photo initiators were detected. The leachate severely affected the antioxidant and biotransformation systems in mussels' tissues. Following exposure to 1 mg center dot L -1 of leachate, mussels' defense system was enhanced to prevent oxidative damage. In contrast, in mussels exposed to 10 and 100 mg center dot L -1 of leachate, defenses failed to overcome pro -oxidant molecules, resulting in genotoxicity and oxidative damage. Principal component analysis (PCA) and Weight of Evidence (WOE) evaluation confirmed that mussels were significantly affected by the leachate being the hazard of the leachate concentrations of 10 mg center dot L -1 ranked as major, while 1 and 100 mg center dot L -1 was moderate. These results highlighted that the leachate from fishing nets and cables can be a threat to the heath of the mussel M. galloprovincialis .