Variation temporelle et hétérogénéité spatiale de la disponibilité en nourriture zooplanctonique dans les «noues» et le cours principal de la Meuse (Belgique)

Abstract

The structure the temporal evolution of zooplankton community of two backwaters of the River Meuse (the « noues de Tailfer » and the «noue de Waulsort») were monitored during spring and summer 1993 and 1996. Crustacean densities were much higher in the Waulsort than in the Tailfer backwater and the main channel of the river. Both backwaters showed a marked spatial heterogeneity of zooplanktonic densities, particularly affected by the communications with the River Meuse and the hydrologie factors.