Effets d'un pompage à gros débit sur le peuplement des Crustacés d'un aquifère karstique

Abstract

A high discharge pumping test performed in a sink-hole connected with the saturated zone of the Baget karstic system (Ariège, France) caused an increased drift of the stygobitic micro-crustaceans, mainly the harpacticoids, of this site. Therefore the pumping site was partially depopulated and, one year later, had not recovered its previous state. Moreover, this pumping test also disturbed the harpacticoid population of the drainage in the down-stream part of the system. Nevertheless, the total harpacticoid population of the system seems to be unaffected by this experience. © Gauthier-Villars, 1993.