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首页> 外文期刊>Open Journal of Marine Science >Evaluation of Environmental and Ecological Effects Due to the Accident in an Oil Pipe from Petrobras in Guanabara Bay, RJ, Brazil
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Evaluation of Environmental and Ecological Effects Due to the Accident in an Oil Pipe from Petrobras in Guanabara Bay, RJ, Brazil

机译：巴西瓜纳巴拉湾巴西国家石油公司石油管道发生事故造成的环境和生态影响评估

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摘要

We aim to evaluate the quality of the Guanabara Bay sediments and the ecological changes due to the PETROBRAS crude oil leak in January 2000. Twenty-six sediment samples collected in July 2000 and in February 2001 were analyzed for pH, dissolved oxygen, and foraminiferal composition. In the northwest and central parts of the bay, low oxygen dissolved values are related to waste discharges with the dominance of Buliminella elegantissima. In winter, near Igua?u River, the pH of the sediment is low, therefore highly acidic. The acidity is responsible for the foraminiferal low diversity limiting the occurrence of species with fragile tests. On the other hand, thicker tests of Elphidium spp. disappeared last, therefore increasing its relative dominance in winter. In summer, this is a barren zone. The explanation lies in the continuous dissolution of tests that culminated with the total disappearance of these microorganisms one year after the accident.
机译：我们的目标是评估2000年1月瓜纳巴拉湾沉积物的质量以及PETROBRAS原油泄漏造成的生态变化。分析了2000年7月和2001年2月收集的26个沉积物样品的pH值，溶解氧和有孔虫组成。在海湾的西北和中部，较低的氧气溶解值与废物排放有关，而该废物占优势种。冬季，伊瓜苏河附近的沉积物pH值低，因此呈酸性。酸度是有孔虫低多样性的原因，它限制了易碎试验物种的发生。另一方面，Elphidium spp的测试较厚。最后消失了，因此在冬天增加了它的相对优势。在夏季，这是一个贫瘠的地区。原因在于测试的持续溶解，最终导致事故发生一年后这些微生物完全消失。

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