2000•Environmental Toxicology and ChemistryRequires access

Evaluation of toxicity: Whole-sediment versus overlying-water exposures with amphipodHyalella azteca

Christopher G. Ingersoll, Chris D. Ivey, Eric L. Brunson, Doug K. Hardesty, Nile E. Kemble

Abstract

Abstract A laboratory study was conducted to evaluate the toxicity of whole-sediment versus overlying-water exposures to the amphipod Hyalella azteca using field-collected sediments. Severe toxic effects (5–63% survival) were observed with amphipods exposed for 10 d in direct contact with sediment. In contrast, amphipods exposed only to overlying water in these sediment exposures did not exhibit any toxic effects.

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Key concepts: Hyalella azteca, Amphipoda, Sediment, Toxicity, Environmental science, Environmental chemistry, Toxicology, Ecology