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Siham Arab

  • Biodiversity Journal, 13 (1): 0055-0064

    Amin Chaffai, Somia Hamil, Ismahane Adaouri, Siham Arab, Abdenour Moussouni & Abdeslem Arab
    Factors determining phytoplankton community growth and succession in the water’s surface of Mediterranean reservoir
    https://doi.org/10.31396/Biodiv.Jour.2022.13.1.55.64

    ABSTRACT
    In order to highlight the relationship between phytoplankton community and environmental variables under the Mediterranean climate, the algae community succession was investigated for the first time in the Hamiz reservoir (Algeria) from the point of view of several environmental controlling factors including: nutrient, water temperature, conductivity, turbidity and transparency. Samples of water were collected monthly over a year and analyzed for nutrient content and phytoplankton density. The total abundance of phytoplankton were particularly marked by two peaks, both of them occur in summer. The most diverse group was Bacillariophyta (38.29%), Chlorophyta (25.35%), and Euglenophyta (19.14%), among which Bacillariophyta and Chlorophyta were the frequently dominated group all over the study. The first two axes of Redundancy analysis (RDA) explained 82.34% of the correlation between phytoplankton group and environmental factors. Water temperature, transparency, nitrate, ammonium and total hardness represent the most significant environmental factors influencing phytoplankton communities structure including the presence of different preferences for environmental factors by algae group.