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https://hdl.handle.net/10316/114902
Title: | Do Freshwater and Marine Bivalves Differ in Their Response to Wildfire Ash? Effects on the Antioxidant Defense System and Metal Body Burden | Authors: | Jesus, Fátima Mesquita, Filipa Virumbrales Aldama, Elisa Marques, Ana Gonçalves, Ana M. M. Magalhães, Luísa Nogueira, António J. A. Ré, Ana Campos, Isabel Pereira, Joana Luísa Gonçalves, Fernando J. M. Abrantes, Nelson Serpa, Dalila |
Keywords: | oxidative stress; wildfire ash; enzymes activity; metal body burden; filter-feeders | Issue Date: | 11-Jan-2023 | Publisher: | MDPI | Project: | PTDC/BIA-ECO/29601/2017 PTDC/CTA-AMB/28936/2017 UIDP/50017/2020 UIDB/50017/2020 LA/P/0069/2020/ARNET info:eu-repo/grantAgreement/UIDB/04292/2020 LA/P/0094/2020 |
Serial title, monograph or event: | International Journal of Environmental Research and Public Health | Volume: | 20 | Issue: | 2 | Abstract: | Wildfires constitute a source of contamination to both freshwater and marine ecosystems. This study aimed to compare the antioxidant defense response of the freshwater clam Corbicula fluminea and the marine cockle (Cerastoderma edule) to wildfire ash exposure and the concomitant metal body burden. Organisms were exposed to different concentrations (0%, 12.5%, 25%, 50%, and 100%) of aqueous extracts of Eucalypt ash (AEAs) from a moderate-to-high severity wildfire. The activity of various enzymes, as well as lipid peroxidation, protein content, and metal body burden, were determined after 96 h of exposure. A significant increase in the protein content of soft tissues was observed for C. edule at AEA concentrations ≥ 25%, unlike for C. fluminea. Similarly, significant effects on lipid peroxidation were observed for cockles, but not for clams. For both species, a significant effect in the total glutathione peroxidase activity was observed at AEA concentrations ≥ 25%. Relative to the control, AEAs-exposed clams showed higher Cd content, whereas AEAs-exposed cockles showed higher Cu content, thus exhibiting different responses to the exposure to wildfire ash. The susceptibility of bivalves to ashes, at environmentally relevant concentrations, raises concern about the effects of post-fire runoff to bivalve species. | URI: | https://hdl.handle.net/10316/114902 | ISSN: | 1660-4601 | DOI: | 10.3390/ijerph20021326 | Rights: | openAccess |
Appears in Collections: | FCTUC Ciências da Vida - Artigos em Revistas Internacionais I&D MARE - Artigos em Revistas Internacionais |
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