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题名: Vertical distribution of Fe and Fe(III)-reducing bacteria in the sediments of Lake Donghu, China
作者: Tian, Cuicui1, 2; Wang, Chunbo1, 2; Tian, Yingying1, 2; Wu, Xingqiang1; Xiao, Bangding1
关键词: vertical distribution ; Fe reduction ; poorly crystalline Fe ; Fe(III)-reducing bacteria ; Lake Donghu
刊名: CANADIAN JOURNAL OF MICROBIOLOGY
发表日期: 2015-08-01
DOI: 10.1139/cjm-2015-0129
卷: 61, 期:8, 页:575-583
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology ; Biotechnology & Applied Microbiology ; Immunology ; Microbiology
研究领域[WOS]: Biochemistry & Molecular Biology ; Biotechnology & Applied Microbiology ; Immunology ; Microbiology
英文摘要: In lake sediments, iron (Fe) is the most versatile element, and the redox cycling of Fe has a wide influence on the biogeochemical cycling of organic and inorganic substances. The aim of the present study was to analyze the vertical distribution of Fe and Fe(III)-reducing bacteria (FeRB) in the surface sediment (30 cm) of Lake Donghu, China. At the 3 sites we surveyed, FeRB and Fe(II)-oxidizing bacteria (FeOB) coexisted in anoxic sediments. Geobacter-related FeRB accounted for 5%-31% of the total Bacteria, while Gallionella-related FeOB accounted for only 0.1%-1.3%. A significant correlation between the relative abundance of poorly crystalline Fe and Geobacter spp. suggested that poorly crystalline Fe favored microbial Fe(III) reduction. Poorly crystalline Fe and Geobacter spp. were significantly associated with solid-phase Fe(II) and total inorganic phosphorus levels. Pore water Fe(II) concentrations negatively correlated with NO3- at all sites. We concluded that Geobacter spp. were abundant in the sediments of Lake Donghu, and the redox of Fe might participate in the cycling of nitrogen and phosphorus in sediments. These observations provided insight into the roles of microbial Fe cycling in lake sediments.
关键词[WOS]: IRON-REDUCING BACTERIA ; FE(III) OXIDE REDUCTION ; FRESH-WATER SEDIMENT ; ORGANIC-MATTER ; PADDY SOILS ; FERRIC IRON ; FERROUS IRON ; DIVERSITY ; PHOSPHORUS ; SUBSURFACE
语种: 英语
WOS记录号: WOS:000358786800007
ISSN号: 0008-4166
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/25961
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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