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Environmental assessment of the central Atlantic coast of Morocco using a multibiomarker approach in Mytilus galloprovincialis

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Abstract

A multibiomarker approach helps assess environmental health as it provides a complete tool to understand the effects of environmental stressors on ecosystems and human health. We applied this approach in the central Atlantic Ocean of Morocco, an area subjected to the impact of many types of pollutants, threatening the durability of its resources. In this study, four biomarkers acetylcholinesterase (AChE), glutathione-s-transferase (GST), metallothioneins (MTs), and catalase (CAT) were measured in the digestive gland of the mussel Mytilus galloprovincialis collected from four sites: Imsouane (S1), Cap Ghir (S2), Imi Ouaddar (S3), and Douira (S4). These sites were chosen due to the diversity of impacts ranging from industrial to agricultural and touristic. We also assembled all the enzymatic responses (AChE, GST, CAT, and MTs), using the integrated biomarker response (IBR), to estimate the degree of impact of pollutants at the prospected sites to reveal all the complex interactions between biomarkers and to classify sites via the integrated approach. Results show a seasonal change in biomarker responses with variability between sites. We also recorded the highest levels of AChE inhibition and GST induction in S1, higher levels of catalase activity in S4, and a significant impact on metallothionein concentration in S1 and S3. This project highlights the interest in using a multibiomarker approach to ensure accurate interpretation of biomarker variation to protect the Moroccan coast and its resources.

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Acknowledgements

We express our sincere gratitude to the Marine Environmental Health Monitoring Laboratory (LSSMM) at the regional center of INRH in Agadir for sampling mussels in the best conditions. Additionally, we would like to convey our heartfelt thanks to Mr. Hassan Oubbamouh for his indispensable role in preparing the samples. Furthermore, we extend our sincerest appreciation to Pr. Nadia Boutaleb for her invaluable guidance in conducting the statistical analysis.

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All authors contributed to the study conception and design. Methodology, conceptualization, data collection, and analysis were performed by Hamza Benrahma. The supervision, reviewing, and editing were performed by Hlima Bessi, Mina Bouhallaoui, and Bouchra Elhaimeur. All authors commented on the previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Hamza Benrahma.

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The authors declare no competing interests.

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Benrahma, H., Bouhallaoui, M., Elhaimeur, B. et al. Environmental assessment of the central Atlantic coast of Morocco using a multibiomarker approach in Mytilus galloprovincialis. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33478-5

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  • DOI: https://doi.org/10.1007/s11356-024-33478-5

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