Title: Effects of increasing temperatures on biomarker responses and accumulation of trace elements in the Ark shell (Arca noae) from Bizerte lagoon
Abstract: Event Abstract Back to Event Effects of increasing temperatures on biomarker responses and accumulation of trace elements in the Ark shell (Arca noae) from Bizerte lagoon Feriel Ghribi1*, Jonathan Richir2, Safa Bejaoui1, Dhouha Boussoufa1, M'Hamed ELCafsi1 and Sylvie Gobert2 1 Tunis El Manar University, Tunisia 2 University of Liège, Belgium The Bizerte lagoon is one of the most studied coastal areas in Tunisia, it is used for shellfish production since 1964 and supports various industry and agriculture activities. This lagoon inhabit a wide diversity of marine invertebrates, among them the valuable shellfish Noah’s ark (Arca noae). The present study examines the influence of increasing temperature on biochemical biomarkers and metal bioaccumulation in the the total edible tissue of Arca noae. Samples were collected during winter 2013 and summer 2014 in the southern sector of the lagoon far from urban and industrial sources of pollution but this site remained influenced by agricultural inputs. After collection, Ark shells were immediately transferred to the laboratory and prepared for analysis. Five oxidative stress biomarkers: metallothioneins (MTs), malondialdehyde (MDA), glutathione peroxidase (GPx), reduced gluthatione (GSH) and acetylcholinesterase (AChE) were monitored as a response to ten trace elements bioaccumulation (Ni, Cr, Cd, Fe, Zn, Mn, Al, Cu, Se and Pb). The rise of temperature from 12°C in December to 28°C in July coincided with the bioaccumulation of trace metals, the high expression of MDA, GPx, GSH and MTs and the inhibition of AChE activity in A. noae tissues. Statistical analysis (Spearman's rank correlation) showed that all trace elements and biomarkers were significantly positively correlated with T, with the exception of Zn, Cd and AChE that was negatively correlated with this parameter. The increase of TE levels in Ark shells during summer may be due to a possible increase in the concentration of metallic elements in the lagoon waters. However, a possible contamination by runoff from adjacent farmland is to be rejected in view of the drought and the scarcity of the rains in this season. Hence, we assume that increasing concentrations of trace elements in A. noae tissues in summer is probably related to the evaporation process due to increased temperature that favors the concentration of these trace elements in the Bizerte lagoon. Thus, T (°C) appears to be a determinant factor on the variability of biomarker responses and metal bioaccumulation in A. noae. Overall, the combined effects of chemical contamination and increased temperature in summer appear to induce a highest metabolic adaptation response and can therefore be used to determine thresholds of effectiveness and facilitate the interpretation of monitoring biomarkers. Keywords: Ark shells, Bizerte lagoon, Trace Elements, Oxydative stress, bioaccumulation Conference: IMMR'18 | International Meeting on Marine Research 2018, Peniche, Portugal, 5 Jul - 6 Jul, 2018. Presentation Type: Poster Presentation Topic: Biodiversity, Conservation and Coastal Management Citation: Ghribi F, Richir J, Bejaoui S, Boussoufa D, ELCafsi M and Gobert S (2019). Effects of increasing temperatures on biomarker responses and accumulation of trace elements in the Ark shell (Arca noae) from Bizerte lagoon. Front. Mar. Sci. Conference Abstract: IMMR'18 | International Meeting on Marine Research 2018. doi: 10.3389/conf.FMARS.2018.06.00149 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 06 May 2018; Published Online: 07 Jan 2019. * Correspondence: Dr. Feriel Ghribi, Tunis El Manar University, Tunis, Tunisia, [email protected] Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Feriel Ghribi Jonathan Richir Safa Bejaoui Dhouha Boussoufa M'Hamed ELCafsi Sylvie Gobert Google Feriel Ghribi Jonathan Richir Safa Bejaoui Dhouha Boussoufa M'Hamed ELCafsi Sylvie Gobert Google Scholar Feriel Ghribi Jonathan Richir Safa Bejaoui Dhouha Boussoufa M'Hamed ELCafsi Sylvie Gobert PubMed Feriel Ghribi Jonathan Richir Safa Bejaoui Dhouha Boussoufa M'Hamed ELCafsi Sylvie Gobert Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.