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Description
The Merja Zerga lagoon, a key coastal ecosystem on the Atlantic coast of Morocco. This study is based on a comparative analysis between the findings of Benbakhta (1994) and those from a seasonal sampling campaign conducted in (2022-2023), with particular focus on copepods, the dominant group within the zooplankton community and a sensitive indicator of environmental change.
The main objective of the study conducted in the Merja Zerga Lagoon is to assess the qualitative distribution of zooplankton communities and analyze their seasonal fluctuations. To collect the data required for this analysis, zooplankton samples were taken in the field using plankton nets. These samples were then carefully sorted and examined under a binocular microscope to identify the species present and determine their qualitative diversity.
According to Benbakhta (1994), the zooplankton community was characterized by the presence of typical species such as Calanus helgolandicus, Acartia clausi, and Temora stylifera, which indicated a relatively stable ecological balance. However, the 2025 results reveal significant changes in species composition. Calanus helgolandicus was no longer observed, suggesting a possible local extinction, and the appearance of new species such as Centropages chierchiae, Farranula spp, and Clausocalanus furcatus.
In conclusion, this research highlights the importance of conserving lagoon ecosystems and implementing management measures to minimize human impacts. The distribution and health of zooplankton communities, particularly copepods, serve as key indicators of ecological quality in these environments and can provide valuable insights for more informed and sustainable marine resource management.
