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学科主题: Ecology ; Marine & Freshwater Biology ; Microbiology
题名: Community Structures and Distribution of Anaerobic Ammonium Oxidizing and nirS-Encoding Nitrite-Reducing Bacteria in Surface Sediments of the South China Sea
作者: [Li, Meng ; Cao, Huiluo ; Gu, Ji-Dong] Univ Hong Kong, Sch Biol Sci, Cape Daguilar, Hong Kong, Peoples R China ; [Li, Meng] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA ; [Hong, Yiguo] Chinese Acad Sci, Key Lab Trop Marine Environm Dynam LED, South China Sea Inst Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Gu, Ji-Dong] Univ Hong Kong, Swire Inst Marine Sci, Cape Daguilar, Hong Kong, Peoples R China
通讯作者: jdgu@hkucc.hku.hk
刊名: MICROBIAL ECOLOGY
发表日期: 2013
卷: 66, 期:2, 页:281-296
部门归属: LTO
资助者: This research was supported in part by a Ph.D. studentship (ML) and by Environmental and Conservation Fund of Hong Kong (J-DG) and National Natural Science Foundation of China (41076095 and 31270163) (Y-GH), and South China Sea Open Cruise by R/V Shiyan 3. We thank Jessie Lai for the general laboratory support at The University of Hong Kong during this study.
摘要: Anaerobic ammonium oxidation (anammox) and denitrification are two important processes responsible for nitrogen loss; monitoring of microbial communities carrying out these two processes offers a unique opportunity to understand the microbial nitrogen cycle. The aim of the current study was to characterize community structures and distribution of anammox and nirS-encoding nitrite-reducing bacteria in surface sediments of the northern South China Sea (SCS). The consistent phylogenetic results of three biomarkers of anammox bacteria, including 16S rRNA, hzo, and Scalindua-nirS genes, showed that Scalindua-like bacteria were the only anammox group presenting in surface sediments of the SCS. However, a relatively high micro-diversity was found within this group, including several SCS habitat-specific phylotypes, Candidatus "Scalindua zhenghei". Comparing to 16S rRNA gene, hzo and Scalindua-nirS genes provided a relatively higher resolution to elucidate anammox bacteria. For the nirS-encoding nitrite-reducing bacteria, the detected nirS gene sequences were closely related to various marine nirS denitrifiers, especially those which originated from coastal and estuarine sediments with a much higher diversity than anammox bacteria. Anammox bacterial communities shifted along with the seawater depth, while nirS-encoding nitrite-reducing bacteria did not. Although nirS-encoding nitrite-reducing bacteria have a much higher abundance and diversity than anammox bacteria, they showed similar abundance variation patterns in research sites, suggesting the two microbial groups might be affected by the similar environmental factors. The significant correlations among the abundance of the two microbial groups with the molar ratio of NH4 (+) to (NO2 (-) + NO3 (-)), pH, and organic matters of sediments strongly supported this hypothesis.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000321668900004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10895
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Recommended Citation:
[Li, Meng; Cao, Huiluo; Gu, Ji-Dong] Univ Hong Kong, Sch Biol Sci, Cape Daguilar, Hong Kong, Peoples R China; [Li, Meng] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; [Hong, Yiguo] Chinese Acad Sci, Key Lab Trop Marine Environm Dynam LED, South China Sea Inst Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Gu, Ji-Dong] Univ Hong Kong, Swire Inst Marine Sci, Cape Daguilar, Hong Kong, Peoples R China.Community Structures and Distribution of Anaerobic Ammonium Oxidizing and nirS-Encoding Nitrite-Reducing Bacteria in Surface Sediments of the South China Sea,MICROBIAL ECOLOGY,2013,66(2):281-296
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文件名: Community Structures and Distribution of Anaerobic Ammonium Oxidizing and nirS-Encoding Nitrite-Reducing Bacteria in Surface Sediments of the South China Sea.pdf
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