Using a spiked sediment bioassay to establish a no-effect concentration for dioxin exposure to the amphipod ampelisca abdita

摘要

A recent study conducted by the National Oceanic and Atmospheric Administration (NOAA) reported a highly significant correlation between 2,3,7,8-tetrachlorodibenzo-p-dioxin(2,3,7,8-TCDD) concentrations and amphipod (Ampelisca abdita) mortality in sediment samples collected from the lower Passaic River and Newark Bay. However, there is a paucity of data regarding the potential effects of 2,3,7,8-TCDD on benthic invertebrates under controlled laboratory exposures. In this study, 10-d whole-sediment bioassays using the marine amphipod A. abdita were conducted on spiked sediment samples representing a range of 2,3,7,8-TCDD concentrations (0-25 Μg/kg dry weight).