Sediment-water interface and water toxicity tests with mysids(Crustacea, Mysidacea) to assess the quality of tropical estuaries

[摘要] The current research aimed to evaluate the environmental quality of Poxim riverestuary(Sergipe, Brazil) using the acute toxicity test with superficial water, and sediment-waterinterface (SWI) as an innovative approach with the microcrustacean Mysidopsis juniae.Superficial water and sediments were sampled in three sites along the extension the Poximestuary, from the inner regions to the mouth of the estuary.The mysids were exposed to waterand to the SWIl system to test for acute toxicity (96 h). Water samples were less toxic to mysidsthan SWl samples，showing water acute toxicity only in inner part of estuary Swl showedtoxicity to all samples only during the rainy month.The SWI and water toxicity tests withmysids were a valuable assay for the identification of toxicity from substances that can beremobilized from sediment to water column and therefore an important tool for assessingcontamination in tropical estuaries.

[学科分类] 天文学(综合)

[关键词] acute toxicity;sediment/water interface;Aracaju;estuarine pollution