Contribution à l'étude de la qualité des eaux de rejet agricoles dans les marais charentais

The agricultural fresh water swamp of Moëze-Brouage, in Charente-Maritime, witnesses the replacement of cattle rearing in the grasslands by intensive farming affecting the quality of waste waters flowing into the ocean. The proximity of the oyster culture basin of Marennes-Oléron and of the ponds lead to the implementation of some ecotoxicological tests, which turned out to be largely positive on some of the swamp's outlets, with negative effects on the tested organisms.