Whomersley P, Schratzberger M, Huxham M, Bates H, Rees H
Centre for Environment, Fisheries and Aquaculture Science, Burnham on Crouch Laboratory, Remembrance Avenue, Burnham on Crouch, Essex CM0 8HA, UK.
Mar Pollut Bull. 2007 Jan;54(1):32-41. doi: 10.1016/j.marpolbul.2006.07.008. Epub 2006 Sep 18.
Sewage sludge was disposed of in Liverpool Bay for over 100 years. Annual amounts increased from 0.5 million tonnes per annum in 1900 to approximately 2 million tonnes per annum by 1995. Macrofauna and a suite of environmental variables were collected at a station adjacent to, and a reference station distant from, the disposal site over 13 years, spanning a pre- (1990-1998) and post- (1999-2003) cessation period. Univariate and multivariate analyses of the time-series data showed significant community differences between reference and disposal site stations and multivariate analyses revealed station-specific community development post-disposal. Temporal variability of communities collected at the disposal station post-cessation was higher than during years of disposal, when temporally stable dominance patterns of disturbance-tolerant species had established. Alterations of community structure post-disturbance reflected successional changes possibly driven by facilitation. Subtle faunistic changes at the Liverpool Bay disposal site indicate that the near-field effects of the disposal of sewage sludge were small and therefore could be considered environmentally acceptable.
在利物浦湾处置污水污泥已有100多年历史。年处置量从1900年的每年50万吨增加到1995年的约每年200万吨。在13年的时间里，在靠近处置场的一个站点以及远离处置场的一个参考站点收集了大型底栖动物和一系列环境变量，这13年跨越了停止处置前（1990 - 1998年）和停止处置后（1999 - 2003年）两个阶段。对时间序列数据进行的单变量和多变量分析表明，参考站点和处置场站点之间存在显著的群落差异，多变量分析揭示了处置后特定站点的群落发展情况。停止处置后在处置站点收集的群落的时间变异性高于处置期间，处置期间耐干扰物种在时间上形成了稳定的优势模式。干扰后群落结构的变化反映了可能由促进作用驱动的演替变化。利物浦湾处置场的细微动物区系变化表明，污水污泥处置的近场影响较小，因此在环境方面可以被认为是可接受的。
