Publication Date:
2015-09-19
Description:
Juvenile marine polychaetes, Neanthes arenaceodentata , were exposed for 28 days to copper (Cu)-spiked sediment at six concentrations ranging from 48.3 to 2380 mg Cu/kg dry sediment, plus control. Survival was reduced ( p ≤ 0.05) at concentrations ≥1190 mg Cu/kg. Growth was inhibited at Cu concentrations ≥506 mg Cu/kg. Dose–response relationships yielded LC 10 and LC 50 estimates of 514 and 1230 mg Cu/kg, respectively. The growth effect EC 50 estimate was 409 mg Cu/kg. Ranges for the no observable effect concentration and lowest observable effect concentration were 506–1190 mg Cu/kg for survival, and 230–506 mg Cu/kg for growth. Pore water concentrations of Cu were 38.7–65.8 µg Cu/L in exposures where toxic effects were observed, compared to a range of 15.1–22.4 µg Cu/L in exposures where significant effects were not evident. The results of the study were compared with empirical and mechanistic sediment quality guidelines for the protection of benthic organisms.
Print ISSN:
0007-4861
Electronic ISSN:
1432-0800
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Medicine
