Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349 Oslo, Norway.
Mar Pollut Bull. 2011 Oct;62(10):2145-56. doi: 10.1016/j.marpolbul.2011.07.007. Epub 2011 Aug 23.
A field experiment was conducted to investigate how water-based drill cuttings and sediment type influence colonization of soft bottom communities. Bottom frames with trays containing defaunated sediments were placed at the seabed for 6 months to study colonization of macrofauna. Two different sediments (coarse and fine) were used, and 6 or 24 mm layer of water-based drill cuttings were added on top of these sediments. Some of the sediments were controls with no additions. In the end of the experiment, the oxygen availability in sediment porewater and macrofaunal abundance were reduced in treatments with 24 mm drill cuttings compared to controls. Tube-building annelids were particularly sensitive to drill cuttings. However, these responses were only minor, and notably, the drill cuttings initiated a weaker faunal response than sediment type and site of the bottom frame. Sediments capped with water-based drill cuttings thus showed a rapid colonization of macrofaunal communities.
开展了一项野外实验，以研究水基钻屑和沉积物类型如何影响软底群落的定殖。将带有托盘的底框放置在海底 6 个月，以研究大型动物的定殖。使用了两种不同的沉积物（粗和细），并在这些沉积物上添加了 6 或 24 毫米厚的水基钻屑。一些沉积物是没有添加物的对照。在实验结束时，与对照相比，24 毫米钻屑处理的沉积物中孔隙水的氧气供应和大型动物的丰度减少。管状环节动物对钻屑特别敏感。然而，这些反应只是轻微的，值得注意的是，与沉积物类型和底框的位置相比，钻屑引发的动物反应较弱。用基钻屑覆盖的沉积物因此显示出大型动物群落的快速定殖。
