“…The Algerian Basin (AB) is classified as mesotrophic (D'Ortenzio and Ribera d'Alcalà, 2009;Harid et al, 2018;O'Reilly and Werdell, 2019). Water exchange across Gibraltar has a significant influence on its general circulation (Béranger et al, 2005;Millot, 1989;Peliz et al, 2009) and controls its nutrient content (Bethoux et al, 2002;Crispi and Pacciaroni, 2009;Elbaz-Poulichet et al, 2001;Huertas et al, 2009), with a direct influence on the Chl-a based phytoplanktonic biomass.…”