Centre for Environment, Fisheries and Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK.
Mar Pollut Bull. 2011 Oct;62(10):2230-45. doi: 10.1016/j.marpolbul.2011.04.012. Epub 2011 Aug 24.
The results of a monitoring programme to assess the spatial impacts associated with ongoing dredged material disposal activity at a dispersive, coastal disposal site (southwest UK) are described. Benthic impacts were assessed using benthic community structure and secondary productivity estimates. Analyses of univariate indices (including secondary production) and multivariate community structure revealed differences between stations inside and those outside the disposal site were minimal. Generally, stations within and outside the disposal site were characterised by the same species. Regression models indicated that the variability in biological structure and secondary production was predominantly accounted for by natural variables (e.g., depth, sediment granulometry) with only a small amount of residual variability being due to contaminant variables. Thus, the elevated levels of certain contaminants in the vicinity of the disposal area were not sufficient to result in significant ecological or ecotoxicological changes. We ascribe such findings partly to the dispersive nature of the disposal site.
描述了一项监测计划的结果，该计划旨在评估在分散的沿海处置场（英国西南部）进行的正在进行的疏浚物料处置活动的空间影响。使用底栖群落结构和次级生产力估算来评估底栖影响。单变量指数（包括次级生产力）和多变量群落结构的分析表明，处置场内外站之间的差异最小。一般来说，处置场内和场外的站点具有相同的物种。回归模型表明，生物结构和次级生产力的可变性主要由自然变量（如深度、沉积物粒度）来解释，只有少量的剩余可变性归因于污染物变量。因此，在处置区域附近某些污染物的升高水平不足以导致显著的生态或生态毒理学变化。我们将这些发现部分归因于处置场的分散性质。
