气候变化领域集成服务门户(CCPortal): Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean; 1.7 Ma

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DOI	10.1073/pnas.2004532117
	Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean; 1.7 Ma
	Sistiaga A.; Husain F.; Uribelarrea D.; Martín-Perea D.M.; Ferland T.; Freeman K.H.; Diez-Martín F.; Baquedano E.; Mabulla A.; Domínguez-Rodrigo M.; Summons R.E.
发表日期	2020
ISSN	0027-8424
起始页码	24720
结束页码	24728
卷号	117 期号:40
英文摘要	Landscape-scale reconstructions of ancient environments within the cradle of humanity may reveal insights into the relationship between early hominins and the changing resources around them. Many studies of Olduvai Gorge during Pliocene-Pleistocene times have revealed the presence of precession-driven wet-dry cycles atop a general aridification trend, though may underestimate the impact of local-scale conditions on early hominins, who likely experienced a varied and more dynamic landscape. Fossil lipid biomarkers from ancient plants and microbes encode information about their surroundings via their molecular structures and composition, and thus can shed light on past environments. Here, we employ fossil lipid biomarkers to study the paleolandscape at Olduvai Gorge at the emergence of the Acheulean technology, 1.7 Ma, through the Lower Augitic Sandstones layer. In the context of the expansion of savanna grasslands, our results represent a resourcerichmosaic ecosystempopulated by groundwater-fed rivers, aquatic plants, angiospermshrublands, and edible plants. Evidence of a geothermally active landscape is reported via an unusual biomarker distribution consistent with the presence of hydrothermal features seen today at Yellowstone National Park. The study of hydrothermalism in ancient settings and its impact on hominin evolution has not been addressed before, although the association of thermal springs in the proximity of archaeological sites documented here can also be found at other localities. The hydrothermal features and resources present at Olduvai Gorge may have allowed early hominins to thermally process edible plants and meat, supporting the possibility of a prefire stage of human evolution. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Biomarkers; Hydrothermalism; Olduvai Gorge; Paleoenvironment; Thermophiles
语种	英语
scopus关键词	biological marker; animal; archeology; bacterium; chemistry; classification; ecosystem; evolution; genetics; hominid; metabolism; microflora; paleontology; physiology; Animals; Archaeology; Bacteria; Biological Evolution; Biomarkers; Ecosystem; Hominidae; Microbiota; Paleontology
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160783
作者单位	Sistiaga, A., Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States, GLOBE Institute, University of Copenhagen, Copenhagen, 1350, Denmark; Husain, F., Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Uribelarrea, D., Institute of Evolution in Africa (IDEA), University of Alcalá, Madrid, 28010, Spain, Geodynamics Stratigraphy and Palaeontology Department, Complutense University of Madrid, Madrid, 28040, Spain; Martín-Perea, D.M., Institute of Evolution in Africa (IDEA), University of Alcalá, Madrid, 28010, Spain, Geodynamics Stratigraphy and Palaeontology Department, Complutense University of Madrid, Madrid, 28040, Spain, Paleobiology Department, National Natural Sciences Museum, Consejo Superior de Investigaciones Científicas, Madrid, 28006, Spain; Ferland, T., Department of Geosciences, Pennsylvania State University, University Park, PA 16802, Un...
推荐引用方式 GB/T 7714	Sistiaga A.,Husain F.,Uribelarrea D.,et al. Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean; 1.7 Ma[J],2020,117(40).
APA	Sistiaga A..,Husain F..,Uribelarrea D..,Martín-Perea D.M..,Ferland T..,...&Summons R.E..(2020).Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean; 1.7 Ma.Proceedings of the National Academy of Sciences of the United States of America,117(40).
MLA	Sistiaga A.,et al."Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean; 1.7 Ma".Proceedings of the National Academy of Sciences of the United States of America 117.40(2020).