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首页> 美国卫生研究院文献>other >DIAGNOSIS OF POTENTIAL STRESSORS ADVERSELY AFFECTING BENTHIC INVERTEBRATE COMMUNITIES IN GREENWICH BAY RHODE ISLAND USA
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DIAGNOSIS OF POTENTIAL STRESSORS ADVERSELY AFFECTING BENTHIC INVERTEBRATE COMMUNITIES IN GREENWICH BAY RHODE ISLAND USA

机译：对美国罗德岛格林威治湾底栖无脊椎动物群落不利影响的潜在应激物的诊断

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Greenwich Bay is an urbanized embayment of Narragansett Bay potentially impacted by multiple stressors. The present study identified the important stressors affecting Greenwich Bay benthic fauna. First, existing data and information were used to confirm that the waterbody was impaired. Second, the presence of source, stressor, and effect were established. Then linkages between source, stressor, and effect were developed. This allows identification of probable stressors adversely affecting the waterbody. Three pollutant categories were assessed: chemicals, nutrients, and suspended sediments. This weight of evidence approach indicated that Greenwich Bay was primarily impacted by eutrophication-related stressors. The sediments of Greenwich Bay were carbon enriched and low dissolved oxygen concentrations were commonly seen, especially in the western portions of Greenwich Bay. The benthic community was depauperate, as would be expected under oxygen stress. Although our analysis indicated that contaminant loads in Greenwich Bay were at concentrations where adverse effects might be expected, no toxicity was observed, due to high levels of organic carbon in these sediments reducing contaminant bioavailability. Our analysis also indicated that suspended sediment impacts were likely nonexistent for much of the Bay. This analysis demonstrates that the diagnostic procedure was useful to organize and assess the potential stressors impacting the ecological well-being of Greenwich Bay. This diagnostic procedure is useful for management of waterbodies impacted by multiple stressors.
机译：格林威治湾是纳拉甘西特湾的城市化隔离带，可能受到多种压力源的影响。本研究确定了影响格林威治湾底栖动物的重要压力源。首先，使用现有数据和信息来确认水体受损。其次，确定了源，压力源和效果的存在。然后，在源，压力源和效果之间建立了联系。这样可以确定可能对水体产生不利影响的压力源。评估了三种污染物类别：化学物质，营养物质和悬浮沉积物。这种证据权重方法表明，格林威治湾主要受到与富营养化有关的压力源的影响。格林威治湾的沉积物富含碳，通常观察到低的溶解氧浓度，尤其是在格林威治湾的西部地区。正如在氧气胁迫下所预期的那样，底栖动物群落已经退化。尽管我们的分析表明，格林威治湾的污染物负荷处于可能会产生不利影响的浓度，但未观察到毒性，原因是这些沉积物中有机碳含量高，降低了污染物的生物利用度。我们的分析还表明，在海湾的大部分地区，悬浮泥沙的影响可能不存在。该分析表明，诊断程序对于组织和评估影响格林威治湾生态福祉的潜在压力源很有用。此诊断过程对于管理受多个压力源影响的水体很有用。

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