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Early animal evolution and highly oxygenated seafloor niches hosted by microbial mats
Ding, Weiming1,2; Dong, Lin1,2; Sun, Yuanlin1,2; Ma, Haoran1,2; Xu, Yihe1,2; Yang, Runyu1,2; Peng, Yongbo3; Zhou, Chuanming4; Shen, Bing1,2
2019-09-20
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume9Pages:11
AbstractThe earliest unambiguous evidence for animals is represented by various trace fossils in the latest Ediacaran Period (550-541Ma), suggesting that the earliest animals lived on or even penetrated into the seafloor.Yet, the O-2 fugacity at the sediment-water interface (SWI) for the earliest animal proliferation is poorly defined. The preferential colonization of seafloor as a first step in animal evolution is also unusual. In order to understand the environmental background, we employed a new proxy, carbonate associated ferrous iron (Fe-carb), to quantify the seafloor oxygenation. Fe-carb of the latest Ediacaran Shibantan limestone in South China, which yields abundant animal traces, ranges from 2.27 to 85.43 ppm, corresponding to the seafloor O-2 fugacity of 162 mu mol/L to 297 mu mol/L. These values are significantly higher than the oxygen saturation in seawater at the contemporary atmospheric pO(2) levels. The highly oxygenated seafloor might be attributed to O-2 production of the microbial mats. Despite the moderate atmospheric pO(2) level, microbial mats possibly provided highly oxygenated niches for the evolution of benthic metazoans. Our model suggests that the O-2 barrier could be locally overcome in the mat ground, questioning the long-held belief that atmospheric oxygenation was the key control of animal evolution.
DOI10.1038/s41598-019-49993-2
Language英语
WOS KeywordDEEP-OCEAN OXYGENATION ; DENGYING FORMATION ; REDOX CONDITIONS ; TRACE FOSSIL ; IRON ; CALCITE ; CARBONATES ; RADIATION ; ECOLOGY ; RECORD
Funding ProjectNatural Science Foundation of China[41672334] ; Natural Science Foundation of China[41402025]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000487002100023
Funding OrganizationNatural Science Foundation of China
PublisherNATURE PUBLISHING GROUP
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Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/27864
Collection中国科学院南京地质古生物研究所
Corresponding AuthorDong, Lin
Affiliation1.MOE, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
2.Peking Univ, Sch Earth & Space Sci, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
3.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Ding, Weiming,Dong, Lin,Sun, Yuanlin,et al. Early animal evolution and highly oxygenated seafloor niches hosted by microbial mats[J]. SCIENTIFIC REPORTS,2019,9:11.
APA Ding, Weiming.,Dong, Lin.,Sun, Yuanlin.,Ma, Haoran.,Xu, Yihe.,...&Shen, Bing.(2019).Early animal evolution and highly oxygenated seafloor niches hosted by microbial mats.SCIENTIFIC REPORTS,9,11.
MLA Ding, Weiming,et al."Early animal evolution and highly oxygenated seafloor niches hosted by microbial mats".SCIENTIFIC REPORTS 9(2019):11.
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