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首页> 外文期刊>Journal of Environmental Science and Health >Degradation potential and microbial community structure of heavy oil-enriched microbial consortia from mangrove sediments in Okinawa, Japan
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Degradation potential and microbial community structure of heavy oil-enriched microbial consortia from mangrove sediments in Okinawa, Japan

机译：日本冲绳红树林沉积物中重油富集的微生物群落的降解潜力和微生物群落结构

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摘要

Mangroves constitute valuable coastal resources that are vulnerable to oil pollution. One of the major processes to remove oil from contaminated mangrove sediment is microbial degradation. A study on heavy oil- and hydrocarbon-degrading bacterial consortia from mangrove sediments in Okinawa, Japan was performed to evaluate their capacity to biodegrade and their microbial community composition. Surface sediment samples were obtained from mangrove sites in Okinawa (Teima, Oura, and Okukubi) and enriched with heavy oil as the sole carbon and energy source. The results revealed that all enriched microbial consortia degraded more than 20% of heavy oil in 21 days. The K1 consortium from Okukubi site showed the most extensive degradative capacity after 7 and 21 days. All consortia degraded more than 50% of hexadecane but had little ability to degrade polycyclic aromatic hydrocarbons (PAHs). The consortia were dominated by Pseudomonas or Burkholderia. When incubated in the presence of hydrocarbon compounds, the active bacterial community shifted to favor the dominance of Pseudomonas. The K.1 consortium was a superior degrader, demonstrating the highest ability to degrade aliphatic and aromatic hydrocarbon compounds; it was even able to degrade heavy oil at a concentration of 15%(w/v). The dominance and turn-over of Pseudomonas and Burkholderia in the consortia suggest an important ecological role for and relationship between these two genera in the mangrove sediments of Okinawa.
机译：红树林构成了宝贵的沿海资源，易受石油污染。从受污染的红树林沉积物中去除油的主要过程之一是微生物降解。对日本冲绳红树林沉积物中重油和碳氢化合物降解细菌菌群的研究进行了评估，以评估其生物降解能力和微生物群落组成。地表沉积物样本是从冲绳（特伊玛，大浦和奥库比）的红树林地点获得的，并富含重油作为唯一的碳和能源。结果表明，所有富集的微生物财团在21天内降解了超过20％的重油。来自Okukubi站点的K1财团在7天和21天后表现出最广泛的降解能力。所有财团均降解了超过50％的十六烷，但几乎没有降解多环芳烃（PAHs）的能力。该财团以假单胞菌或伯克霍尔德菌为主。当在碳氢化合物存在下孵育时，活跃的细菌群落转移到有利于假单胞菌的优势。 K.1联盟是出色的降解剂，显示出最高的降解脂族和芳族烃化合物的能力。它甚至能够以15％（w / v）的浓度降解重油。假单胞菌和伯克霍尔德氏菌在该财团中的优势地位和周转表明这两个属在冲绳红树林沉积物中起着重要的生态作用，并关系到它们之间的关系。

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