Dynamique trophique du zooplancton et relation phytoplancton-zooplancton au sein de l'écosystème de la mer de Bou Grara
Keywords:
Organic matter, Zooplankton, Phytoplankton, Trophic relationships, Trophodynamic cycle, Transformation, Food chains, Carnivores, Lagoons, Podon polyphemoides, Oithona nana, Sagitta, Sagitta inflate, Marine, Tunisia, Bou Grara LagoonAbstract
Study of the trophic dynamics of the zooplankton in Bou Grara Lagoon, Tunisia confirmed its essential role in the production and transformation of organic matter into the first steps of the marine food chain, leading it to the upper carnivores (planktonophagic fish, benthic species). Phytoplankton trophic dynamics is an important characteristic in the understanding of trophic relationships both within zooplankton, and also between phytoplankton and zooplankton. Copepod nauplii and tintinnids comprise the 2 most important groups of microzooplankton (40.46%). Pelagic copepods, the major group representing the mesozooplankton, comprise 34.25% of the total zooplankton during the year studied (April 1992-March 1993). The carnivores are mainly represented by Oithona nana, Podon polyphemoides and Sagitta inflate.
