National Status and Trends: Bioeffects Assessment Program, Chesapeake Bay Summary Database (1998-2001)

This study was based on the sediment quality triad (SQT) approach. A stratified probabilistic sampling design was utilized to characterize the Chesapeake Bay system in terms of chemical contamination, sediment toxicity (Microtox, amphipod bioassay; sea urchin gamete bioassay; and P450 biomarker) and benthic infaunal community structure. The purpose was to define the extent and magnitude of toxicity and other biological effects associated with contaminants in the mainstem Chesapeake estuary and major western subestuaries. This file contains data measured in the Chesapeake Bay estuary system sampled in 1998, 1999, and 2001. Samples were collected for sediment analyses.

本研究基于沉积物质量三重法（sediment quality triad, SQT）开展。研究采用分层概率抽样设计，对切萨皮克湾系统的化学污染状况、沉积物毒性（含Microtox测试、端足类生物测定、海胆配子生物测定及P450生物标志物（P450 biomarker））与底栖内栖动物群落结构进行表征。本研究旨在明确切萨皮克湾干流及西部主要支流河口区域内，污染物相关的毒性效应与其他生物效应的波及范围与严重程度。本文件收录了1998年、1999年及2001年采样的切萨皮克湾河口系统实测数据，所有样本均采集用于沉积物分析。