Sediment contamination and biological effects in a Chesapeake Bay marina.

摘要: Complementary measures of sediment toxicity, chemistry and benthic community structure were evaluated at stations within on the outside perimeter an enclosed marina Bohemia River, a northeastern tributary to Chesapeake Bay. Sediment concentrations polynuclear aromatic hydrocarbons, copper tributyltin (TBT) elevated inside basin. A 28 day partial life-cycle test with amphipod Hyalella azteca indicated no significant lethal effects associated sediments. However, amphipods exposed sediments collected from three basin significantly larger than control sediments, possibly as result hormesis. pore water two out eliciting enhanced growth caused reduction in light emission by luminescent bacteria Microtox® assay. Furthermore, these contained greatest measured TBT. Benthic infaunal communities that typically reflect environmental degradation found exclusively The area impact appears be localized basin, design limits flushing and, hence, contaminant export.