Biological Assessment of the Soluble Fraction of the Standard Elutriate Test.

摘要

This report presents some of the results obtained on the bioevaluation of the standard elutriate test developed by the Environmental Protection Agency and the Corps of Engineers. Selected species of algae,bacteria,and protozoans were used as test organisms. Marine and freshwater species of each group were tested. Sediment samples were collected from four locations that are periodically dredged and water samples were collected from their corresponding disposal sites. The results of algal bioassays indicated both stimulatory and inhibitory effects when growth in the elutriate was compared to growth in disposal site water. The results are discussed in relation to water quality. Algal bioassays are one method of assisting the evaluation of the suitability of a particular dredged material for disposal. Bacteria and protozoans are important in the cycling of nutrients and toxicants but are not recommended as test organisms for water column effects.