globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12126
Scopus记录号: 2-s2.0-84922729068
论文题名:
Assessing the distribution of sedimentary C40 carotenoids through time
作者: French K.L.; Rocher D.; Zumberge J.E.; Summons R.E.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2015
卷: 13, 期:2
起始页码: 139
结束页码: 151
语种: 英语
Scopus关键词: assessment method ; bacterium ; biomarker ; biostratigraphy ; carbon isotope ; carotenoid ; numerical model ; Paleogene ; Phanerozoic ; photoautotrophy ; photosynthesis ; plankton ; plant extract ; Precambrian ; sediment transport ; temporal distribution ; Chromatiaceae ; biological marker ; carotenoid ; chemistry ; Chlorobi ; Chromatiaceae ; mass fragmentography ; metabolism ; sediment ; tandem mass spectrometry ; time ; Biological Markers ; Carotenoids ; Chlorobi ; Chromatiaceae ; Gas Chromatography-Mass Spectrometry ; Geologic Sediments ; Tandem Mass Spectrometry ; Time Factors
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: A comprehensive marine biomarker record of green and purple sulfur bacteria (GSB and PSB, respectively) is required to test whether anoxygenic photosynthesis represented a greater fraction of marine primary productivity during the Precambrian than the Phanerozoic, as current models of ocean redox evolution suggest. For this purpose, we analyzed marine rock extracts and oils from the Proterozoic to the Paleogene for C40 diagenetic products of carotenoid pigments using new analytical methods. Gas chromatography coupled with tandem mass spectrometry provides a new perspective on the temporal distributions of carotenoid biomarkers for phototrophic sulfur bacteria, specifically okenane, chlorobactane, and paleorenieratane. According to conventional paleoredox interpretations, this revised stratigraphic distribution of the GSB and PSB biomarkers implies that the shallow sunlit surface ocean (<24 m) became sulfidic more frequently in the geologic past than was previously thought. We reexamine whether there is evidence supporting a planktonic source of GSB and PSB pigments in marine systems or whether additional factors are required to explain the marine phototrophic sulfur bacteria record. To date, planktonic GSB and PSB and their pigments have been identified in restricted basins and lakes, but they have yet to be detected in the unrestricted, transiently sulfidic, marine systems. Based on modern observations, additional environmental factors, including basin restriction, microbial mats, or sediment transport, may be required to fully explain GSB and PSB carotenoids in the geologic record. © 2015 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85145
Appears in Collections:影响、适应和脆弱性

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作者单位: Massachusetts Institute of Technology, Woods Hole Oceanographic Institution, Cambridge, MA, United States; GeoMark Research, Ltd., Houston, TX, United States; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States

Recommended Citation:
French K.L.,Rocher D.,Zumberge J.E.,et al. Assessing the distribution of sedimentary C40 carotenoids through time[J]. Geobiology,2015-01-01,13(2)
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