Tremblay Louis A, Clark Dana, Sinner Jim, Ellis Joanne I
Cawthron Institute, 98 Halifax Street East, Private Bag 2, Nelson, 7010, New Zealand.
Environ Sci Process Impacts. 2017 Sep 20;19(9):1134-1141. doi: 10.1039/c7em00073a.
The sustainable management of estuarine and coastal ecosystems requires robust frameworks due to the presence of multiple physical and chemical stressors. In this study, we assessed whether ecological health decline, based on community structure composition changes along a pollution gradient, occurred at levels below guideline threshold values for copper, zinc and lead. Canonical analysis of principal coordinates (CAP) was used to characterise benthic communities along a metal contamination gradient. The analysis revealed changes in benthic community distribution at levels below the individual guideline values for the three metals. These results suggest that field-based measures of ecological health analysed with multivariate tools can provide additional information to single metal guideline threshold values to monitor large systems exposed to multiple stressors.
由于存在多种物理和化学应激源，河口和沿海生态系统的可持续管理需要强有力的框架。在本研究中，我们评估了基于沿污染梯度的群落结构组成变化的生态健康衰退是否发生在低于铜、锌和铅指导阈值的水平。主坐标典型分析（CAP）用于描述沿金属污染梯度的底栖生物群落。分析揭示了在低于三种金属各自指导值的水平下底栖生物群落分布的变化。这些结果表明，用多变量工具分析的基于实地的生态健康测量可以为单一金属指导阈值提供额外信息，以监测暴露于多种应激源的大型系统。
