Hamza Benrahma

Title : A contribution to evaluating Moroccan coastal lagoons: Insights from a multibiomarker approach

Abstract:

Moroccan coastal lagoons are essential ecosystems that provide numerous ecological benefits; however, they face significant threats, primarily from human activities.

In this study, we aimed to assess the presence and impact of stressors on marine bivalves sampled from three Moroccan lagoons—Moulay Bousselham, Sidi Moussa, and Oualidia—using a multibiomarker approach, bivalves of commercial size were sampled and transferred to the lab at 4°C, upon arriving they were dissected, and the digestive gland was removed, the day of analysis the samples were homogenized, grinned and centrifuged to obtain an S9 fraction that was used for the analysis of four key biomarkers—Acetylcholinesterase activity (AChE), Glutathione-S-Transferase (GST), Catalase (CAT), and Metallothioneins (MTs).

Our findings revealed distinct patterns of biochemical responses, highlighting variations in pollution levels and seasonal dynamics across the lagoons under study.

A correlation was found between biomarkers (GST and AChE/ Mts and CAT). These biochemical responses also affected the IBR in a varied pattern. Nevertheless, GST showed the most significant impact and correlation with the results of this index.

The Oualidia lagoon showed signs of improvement in environmental quality, and the Sidi Moussa lagoon, with significant biomarker changes indicating a pollution impact, underscores the urgent need to address anthropogenic activities threatening these ecosystems.

The results of this study, when linked to other chemical and environmental reports, could provide a comprehensive evaluation of the Moroccan lagoons. This comprehensive understanding can guide decisions aimed at preserving these vital ecosystems.

Audience Take Away Notes:

• How important are coastal lagoons in Morocco?
• What is a multibiomarker approach, and what is its utility in Marine biomonitoring?
• The significance of each biomarker that we used in this approach
• How can Policymakers use this kind of study to develop targeted strategies for effective pollution monitoring?

Biography:

Hamza Benrahma, a Ph.D. student at the University of Hassan 2 Casablanca and the National Institute of Fisheries Research Morocco, is currently engaged in research focused on the assessment of environmental quality along the Moroccan coast. Employing a multibiomarker approach, the environmental quality is evaluated primarily through the responses of marine bivalves. With a keen interest in ecotoxicology, particularly within aquatic environments. Passionate about contributing to the field of Ecotoxicology, especially in the aquatic environment, because understanding human impacts on marine biodiversity is crucial for preserving its health.