Biodiversity of marine macroalgae in Oran coast (Algerian west coast – Mediterranean Sea)

This work aims to establish the current state of knowledge of the macroalgae on the Oran coast. This research used a survey method using three stations (Marsa El Hadjaj, Kristel and Ain Franine). Sampling was taken out in the intertidal zone of the coastal area. The study was conducted from April to May 2022. Floristic studies have been mainly focused on identifying the algae growing on rocky substrate. The results showed that there were 22 species of macroalgae grouped into 12 orders, 13 families, and 3 divisions: 5 Phaeophyceae, 8 Ulvophyceae and 9 Florideophyceae. The Ain Franine site is the most diverse, followed by Marsa El Hadjaj and Kristel with (21, 16 and 10 species) respectively. With a Global Average Cover of 47.80%, the Florideophyceae dominate the site of Marsa El Hadjaj, and the Chlorophyceae dominate at the sites of Ain Franine and Kristel with (52.53%; 48.35% and 48.35%) respectively.