Effects of three different PAHs on nitrogen-fixing bacterial diversity in mangrove sediment
Sun, FL; Wang, YS; Sun, CC; Peng, YL; Deng, C; yswang@scsio.ac.cn
2012
发表期刊ECOTOXICOLOGY
ISSN0963-9292
卷号21期号:6页码:1651-1660
摘要Polycyclic aromatic hydrocarbons (PAHs) are of great environmental and human health concerns due to their widespread occurrence, persistence and carcinogenic properties. There is now compelling evidence that the mangrove sediment microbial structure is susceptible to PAHs contamination. The study aimed to assess the effects of PAHs on the nitrogen-fixing bacterial community of mangrove sediment. Three types of PAHs, naphthalene (NAP), a two-ring PAH; fluorene (FLU), a three-ring PAH; and pyrene (PYR), a four-ring PAH; were applied at three doses. After 7 and 24 days of incubation, the nitrogen-fixing bacterial population and diversity were evidenced in the nifH gene polymerase chain reaction denaturing gradient gel electrophoresis profile. DGGE pattern shows that the nitrogen-fixing bacterial community changed significantly with the types and doses of PAHs, and the incubation time. As far as single PAH is concerned, high concentration of PAH has larger impact on the nitrogen-fixing bacteria than low concentration of PAH. Besides, among the three types of PAHs, NAP has the greatest short term toxicity; PYR has the strongest long-term impact, whereas FLU has relatively higher long-time effect. Multidimensional scaling analysis and correspondence analysis are two reliable multivariate analysis methods for investigating the relationship between the nitrogen-fixing bacterial community and PAHs contamination. Investigating the effect of PAHs on the nitrogen-fixing bacterial diversity could yield useful information for understanding the process of biogeochemical cycling of nitrogen in mangrove sediment. The present study reveals that nitrogen-fixing bacterial community can be used as an important parameter indicating the impact of PAHs on mangrove sediment ecosystem.
部门归属[Sun, Fu-Lin; Wang, You-Shao; Sun, Cui-Ci; Peng, Ya-Lan; Deng, Chao] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Sun, Fu-Lin; Wang, You-Shao; Sun, Cui-Ci; Peng, Ya-Lan; Deng, Chao] Chinese Acad Sci, Daya Bay Marine Biol Res Stn, Shenzhen 518121, Peoples R China
关键词Pahs Mangrove Sediment Dgge Nitrogen-fixing Bacteria Shannon Diversity Index Multivariate Analysis
学科领域Ecology ; Environmental Sciences ; Toxicology
语种英语
资助项目LTO
WOS记录号WOS:000306592100010
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10143
专题热带海洋环境国家重点实验室(LTO)
通讯作者yswang@scsio.ac.cn
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GB/T 7714
Sun, FL,Wang, YS,Sun, CC,et al. Effects of three different PAHs on nitrogen-fixing bacterial diversity in mangrove sediment[J]. ECOTOXICOLOGY,2012,21(6):1651-1660.
APA Sun, FL,Wang, YS,Sun, CC,Peng, YL,Deng, C,&yswang@scsio.ac.cn.(2012).Effects of three different PAHs on nitrogen-fixing bacterial diversity in mangrove sediment.ECOTOXICOLOGY,21(6),1651-1660.
MLA Sun, FL,et al."Effects of three different PAHs on nitrogen-fixing bacterial diversity in mangrove sediment".ECOTOXICOLOGY 21.6(2012):1651-1660.
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