
water physico-chemical characteristics : Environmental characterization of different depths and site representing the biogeochemical differences of the Bizerte lagoon, north of Tunisia, was done in order to select a site and depth for the culture of the red algae Gracilaria verrucosa. The concentration and distribution of nutrient (ammonium, phosphate) in water, as well as the salinity, temperature and dissolved oxygen was studied along three sampling stations at different depths (1, 2, 3 and 4 m), during a spring 2009 in order to know their spatial and temporal variations. Standardized analytical methods were applied in order to reach these objectives. The use of soils for farming and continental runoff of the adjacent terrestrial systems close to the coastal lagoon seemed to be a significant nutrient source for this water body. During this period, we noticed the absence of all stratification horizontal and vertical concerning the various studied parameters.
La caractérisation environnementale de trois zones de la lagune de Bizerte a été faite dans le but d’identifier le meilleur emplacement pour la culture de l’algue rouge Gracilaria verrucosa. La concentration et la distribution des nutriments (ammonium, phosphate) dans l'eau ainsi que la salinité, la température et l’oxygène dissous ont été étudiées dans trois stations d’échantillonnage à différentes profondeurs (1, 2, 3 et 4 m) durant le printemps 2009 afin de suivre leurs variations. Les méthodes analytiques internationales standardisées ont été appliquées. La lagune est influencée par les apports de son bassin versant et est caractérisée par l’absence de toute stratification horizontale et verticale concernant les différents paramètres étudiés. Cette homogénéité des paramètres physicochimiques permet d’envisager la culture de l’algue sur tout le plan d’eau.
Published
Water quality, Site selection, Gracilaria verrucosa
Water quality, Site selection, Gracilaria verrucosa
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