Norwegian College of Fishery Science, UiT The Arctic University of Norway, PO Box 6050 Langnes, 9037 Tromsø, Norway.
Vår Energi, Vestre Svanholmen 1, 4313 Sandnes, Norway.
Mar Pollut Bull. 2021 Mar;164:111987. doi: 10.1016/j.marpolbul.2021.111987. Epub 2021 Jan 27.
The spatial extent and persistence of bacterial change caused by deposition of water-based drill cuttings on the seafloor were explored by a community-wide approach. Ten centimeter sediment cores were sampled along transects extending from ≤15 m to 250 m from three nearby drilling sites in the southern Barents Sea. Eight months, 8 years and 15 years, respectively, had passed since the completion of the drillings. At locations heavily affected by drill cuttings, the two most recent sites showed distinct, corresponding deviances from native Barents Sea bacterial community profiles. Otherwise marginal groups, including Mollicutes and Clostridia, showed significant increases in relative abundance. Beyond 100 m from the boreholes the microbiotas appeared undisturbed, as they did at any distance from the 15-years old borehole. The extent of the biological distortion, as indicated by the present microbial study, agreed with previously published macrofaunal surveys at the same drilling sites.
采用全群落研究方法探索了水基钻屑在海底沉积引起的细菌变化的空间范围和持久性。从巴伦支海南部的三个附近钻井地点，沿着从≤15 米到 250 米的测线采集了 10 厘米的沉积物岩芯。自钻井完成以来，分别过去了 8 个月、8 年和 15 年。在受钻屑严重影响的地点，最近的两个地点与巴伦支海本地细菌群落图谱明显不同。否则，包括柔膜体纲和梭菌在内的边缘菌群的相对丰度显著增加。在距离钻孔 100 米以外的地方，微生物群似乎没有受到干扰，就像在距离 15 年钻孔的任何距离处一样。目前的微生物研究表明，生物扭曲的程度与在同一钻井地点进行的先前发表的大型动物调查结果一致。
