Lee Jaejin, Han Il, Kang Bo Ram, Kim Seong Heon, Sul Woo Jun, Lee Tae Kwon
Unit of Antarctic K-route Expedition, Korea Polar Research Institute, Incheon, Republic of Korea.
Department of Environmental Engineering, Yonsei University, Wonju, Republic of Korea.
Mar Pollut Bull. 2017 Jan 15;114(1):296-301. doi: 10.1016/j.marpolbul.2016.09.043. Epub 2016 Sep 23.
Crude oil spills, Hebei Spirit in South Korea, is considered as one of the worst environmental disasters of the region. Our understanding on activation of oil-degrading bacteria and resilience of microbial community in oil contaminated sites are limited due to scarcity of such event. In the present study, tidal flat sediment contaminated by the oil spill were investigated for duration of 13months to identify temporal change in microbial community and functional genes responsible for PAH-degradation. The results showed predominance of previously known oil-degrading genera, such as Cycloclasticus, Alcanivorax, and Thalassolituus, displaying significant increase within first four months of the accident. The disturbance caused by the oil spill altered the microbial community and its functional structures, but they were almost restored to the original state after 13months. Present study demonstrated high detoxification capacity of indigenous bacterial populations in the tidal flat sediments and its resilience of microbial community.
原油泄漏事件，如韩国的“河北精神号”漏油事故，被认为是该地区最严重的环境灾难之一。由于此类事件稀少，我们对石油污染场地中油降解细菌的激活以及微生物群落恢复力的了解有限。在本研究中，对受漏油污染的潮滩沉积物进行了为期13个月的调查，以确定微生物群落和负责多环芳烃降解的功能基因的时间变化。结果显示，先前已知的油降解属，如环裂菌属、食烷菌属和海油杆菌属占主导地位，在事故发生后的前四个月内显著增加。漏油造成的干扰改变了微生物群落及其功能结构，但在13个月后它们几乎恢复到了原始状态。本研究证明了潮滩沉积物中本地细菌种群的高解毒能力及其微生物群落的恢复力。
