Test No. 218: Sediment-Water Chironomid Toxicity Using Spiked Sediment

Toxicity of Cedar River Water and Sediment to Larval Walleye

Toxicity of Metals in Water and Sediment to Aquatic Biota

......................................................................................................................................................839 Introduction.................................................................................................................................................839 Purpose and Scope ...................................................................

Importance of equilibration time in the partitioning and toxicity of zinc in spiked sediment bioassays.

The influences of spiked Zn concentrations (1-40 micromol/g) and equilibration time (approximately 95 d) on the partitioning of Zn between pore water (PW) and sediment were evaluated with estuarine sediments containing two levels (5 and 15 micromol/g) of acid volatile sulfides (AVS). Their influence on Zn bioavailability was also evaluated by a parallel, 10-d amphipod (Leptocheirus plumulosus) ...

Biological responses of Lumbriculus variegatus exposed to fluoranthene-spiked sediment.

Lumbriculus variegatus was used as a bioassay organism to examine the impact of the sediment-associated polycyclic aromatic hydrocarbon (PAH) fluoranthene on behavior, reproduction, and toxicokinetics. The number of worms increased between the beginning and end of the experiment at 59 microg x g(-1) fluoranthene, but at the next higher treatment (108 microg x g(-1)) the number of worms found wa...

Predictions of sediment toxicity using consensus-based freshwater sediment quality guidelines.

The objectives of this study were to compare approaches for evaluating the combined effects of chemical mixtures on the toxicity in field-collected sediments and to evaluate the ability of consensus-based probable effect concentrations (PECs) to predict toxicity in a freshwater database on both a national and regional geographic basis. A database was developed from 92 published reports, which i...