Le plancton en étangs piscicoles extensifs : production et exportation

Abstract : The aim of the study was to define a descriptive plan of extensive fish-breeding ponds functioning and to understand ponds-river interactions concerning plankton export and drift from the pond of Lindre (Lorraine) through the river Seille. In a same eutrophic context, morphology of ponds influenced the seasonal pattern of plankton. A very low depth allowed summer colonization of hydrophytes. In deeper ponds, Cyano bacteria bloom couldn't be controlled by plankton-exported biomass. But the upstream part of the river Seille represented an environmental challenge for this exported organic matter. The degradation of this planktonic matter, the drift of Cyanobacteria, and especially their death in the upstream part of the river Seille, displayed the necessity of an acute survey with rregard to the incurrent risk (toxicity)
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Stéphanie Didier. Le plancton en étangs piscicoles extensifs : production et exportation. Sciences agricoles. Université Paul Verlaine - Metz, 2003. Français. ⟨NNT : 2003METZ002S⟩. ⟨tel-01749997⟩

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