Assessment of physico-chemical and biological parameters of Aguelmam Sidi Ali Lake, a threatened Ramsar Site, Morocco

The objective of this work is to study the physicochemical and biological quality of the waters of Aguelmam Sidi Ali from 2015 to 2016. The Kruskal-Wallis nonparametric ANOVA test was used to detect any variability in water temperature, oxygen concentration, pH, electrical conductivity, salinity, turbidity, concentration of solid solvents, ammonia nitrogen, nitric nitrogen, total nitrogen, orthophosphates, total phosphorus, chlorophyll a, b and c and carotenoids between seasons and lake depths. Analysis of variance (ANOVA, Tukey's test) was used to detect any difference in depth determined by Secchi disc. Principal Component Analysis (PCA) was used to describe the relationships between environmental variables and sample distribution. The results showed significant differences (p