DOI: 10.1111/gbi.12192
Scopus记录号: 2-s2.0-85027934225
论文题名: The role of microaerophilic Fe-oxidizing micro-organisms in producing banded iron formations
作者: Chan C.S. ; Emerson D. ; Luther G.W. ; 3rd
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2016
卷: 14, 期: 5 起始页码: 509
结束页码: 528
语种: 英语
Scopus关键词: iron
; dissolved oxygen
; hydroxide
; iron
; marine environment
; microorganism
; oxidation
; paleoenvironment
; water column
; aerobic metabolism
; archaeon
; bacterium
; metabolism
; microbiology
; oxidation reduction reaction
; Aerobiosis
; Archaea
; Bacteria
; Environmental Microbiology
; Iron
; Oxidation-Reduction
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences
; Environmental Science: General Environmental Science
; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Despite the historical and economic significance of banded iron formations (BIFs), we have yet to resolve the formation mechanisms. On modern Earth, neutrophilic microaerophilic Fe-oxidizing micro-organisms (FeOM) produce copious amounts of Fe oxyhydroxides, leading us to wonder whether similar organisms played a role in producing BIFs. To evaluate this, we review the current knowledge of modern microaerophilic FeOM in the context of BIF paleoenvironmental studies. In modern environments wherever Fe(II) and O2 co-exist, microaerophilic FeOM proliferate. These organisms grow in a variety of environments, including the marine water column redoxcline, which is where BIF precursor minerals likely formed. FeOM can grow across a range of O2 concentrations, measured as low as 2 μm to date, although lower concentrations have not been tested. While some extant FeOM can tolerate high O2 concentrations, many FeOM appear to prefer and thrive at low O2 concentrations (~3-25 μm). These are similar to the estimated dissolved O2 concentrations in the few hundred million years prior to the 'Great Oxidation Event' (GOE). We compare biotic and abiotic Fe oxidation kinetics in the presence of varying levels of O2 and show that microaerophilic FeOM contribute substantially to Fe oxidation, at rates fast enough to account for BIF deposition. Based on this synthesis, we propose that microaerophilic FeOM were capable of playing a significant role in depositing the largest, most well-known BIFs associated with the GOE, as well as afterward when global O2 levels increased. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85098
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Geological Sciences, University of Delaware, and the Delaware Biotechnology Institute, Newark, DE, USA; School of Marine Science and Policy, University of Delaware, Newark & Lewes, DE, USA; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, USA
Recommended Citation:
Chan C.S.,Emerson D.,Luther G.W.,et al. The role of microaerophilic Fe-oxidizing micro-organisms in producing banded iron formations[J]. Geobiology,2016-01-01,14(5)