Department of Marine Ecology, National Environmental Research Institute, Aarhus University, Denmark.
Chemosphere. 2011 Mar;82(10):1358-66. doi: 10.1016/j.chemosphere.2010.11.077. Epub 2010 Dec 24.
Effects of bioturbation by the common lugworm Arenicola marina on the fate of oil hydrocarbons (alkanes and PAHs) were studied in situ during a simulated oil spill in a shallow coastal area of Roskilde fjord, Denmark. The fate of selected oil compounds was monitored during 120 d using GC-MS and bioturbation activity (feces production and irrigation) was measured regularly during the experiment and used as input parameters in a mechanistic model describing the effects of A. marina on the transport and degradation of oil compounds in the sediment. The chemical analytical data and model results indicated that A. marina had profound and predictable effects on the distribution, degradation and preservation of oil and that the net effect depended on the initial distribution of oil. In sediment with an oil contaminated subsurface-layer A. marina buried the layer deeper in the sediment which clearly enhanced oil persistence. Conversely, A. marina stimulated both the physical removal and microbial degradation of oil compounds in uniformly oil contaminated sediments especially in deeper sediment layers (10-20 cm below the surface), whereas the fate of oil compounds deposited in surface layers (0-5 cm) mainly was affected by removal processes induced by wave actions and other bioturbating infauna such as Nereis diversicolor, Corophium volutator and Hydrobia spp. present in the experimental plots.
在丹麦罗斯基勒峡湾的一个浅海地区进行了一次模拟溢油事件，研究了普通环节虫 Arenicola marina 的生物扰动对石油烃（烷烃和 PAHs）命运的影响。在 120 天的时间里，使用 GC-MS 监测了选定油化合物的命运，并且在实验期间定期测量生物扰动活动（粪便产生和灌溉），并将其用作描述 A. marina 对油化合物在沉积物中传输和降解的影响的机制模型的输入参数。化学分析数据和模型结果表明，A. marina 对石油的分布、降解和保存有深远而可预测的影响，其净效应取决于石油的初始分布。在有油污染的底层的沉积物中，A. marina 将该层埋得更深，这显然增强了石油的持久性。相反，A. marina 刺激了均匀污染的沉积物中油化合物的物理去除和微生物降解，特别是在更深的沉积物层（表面以下 10-20 厘米），而沉积在表层（0-5 厘米）的油化合物的命运主要受到波浪作用和其他在实验区域中存在的生物扰动底栖动物如多毛类 Nereis diversicolor、Corophium volutator 和 Hydrobia spp. 引起的去除过程的影响。
