气候变化领域集成服务门户(CCPortal): Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia

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DOI	10.1073/pnas.2006982117
	Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia
	Negash E.W.; Alemseged Z.; Bobe R.; Grine F.; Sponheimer M.; Wynn J.G.
发表日期	2020
ISSN	0027-8424
起始页码	21921
结束页码	21927
卷号	117 期号:36
英文摘要	Diet provides critical information about the ecology and environment of herbivores. Hence, understanding the dietary strategies of fossil herbivores and the associated temporal changes is one aspect of inferring paleoenvironmental conditions. Here, we present carbon isotope data from more than 1,050 fossil teeth that record the dietary patterns of nine herbivore families in the late Pliocene and early Pleistocene (3.6 to 1.05 Ma) from the Shungura Formation, a hominin-bearing site in southwestern Ethiopia. An increasing trend toward C4herbivory has been observed with attendant reductions in the proportions of browsers and mixed feeders through time. A high proportion of mixed feeders has been observed prior to 2.9 Ma followed by a decrease in the proportion of mixed feeders and an increase in grazers between 2.7 and 1.9 Ma, and a further increase in the proportion of grazers after 1.9 Ma. The collective herbivore fauna shows two major change points in carbon isotope values at ~2.7 and ~2.0 Ma. While hominin fossils from the sequence older than 2.7 Ma are attributed to Australopithecus, the shift at ~2.7 Ma indicating the expansion of C4grasses on the landscape was concurrent with the first appearance of Paranthropus. The link between the increased C4herbivory and more open landscapes suggests that Australopithecus lived in more wooded landscapes compared to later hominins such as Paranthropus and Homo, and has implications for key morphological and behavioral adaptations in our lineage. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Fauna; Herbivores; Shungura Formation; Stable isotopes; Tooth enamel
语种	英语
scopus关键词	carbon; isotope; animal food; Article; Australopithecus; enamel; Ethiopia; fauna; grazing; herbivore; landscape; Lower Pleistocene; nonhuman; priority journal; Upper Pleistocene; adaptation; animal; diet; ecosystem; feeding behavior; fossil; growth, development and aging; herbivory; history; hominid; paleontology; physiology; Poaceae; Adaptation, Physiological; Animals; Diet; Ecosystem; Ethiopia; Feeding Behavior; Fossils; Herbivory; History, Ancient; Hominidae; Paleontology; Poaceae
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/160817
作者单位	Negash, E.W., Center for the Advanced Study of Human Paleobiology, George Washington University, Washington, DC 20052, United States; Alemseged, Z., Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, United States; Bobe, R., School of Anthropology, University of Oxford, Oxford, OX2 6PE, United Kingdom, Gorongosa National Park, Sofala, Mozambique; Grine, F., Department of Anthropology, Stony Brook University, Stony Brook, NY 11794, United States; Sponheimer, M., Department of Anthropology, University of Colorado Boulder, Boulder, CO 80302, United States; Wynn, J.G., Division of Earth Sciences, National Science Foundation, Alexandria, VA 22314, United States
推荐引用方式 GB/T 7714	Negash E.W.,Alemseged Z.,Bobe R.,et al. Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia[J],2020,117(36).
APA	Negash E.W.,Alemseged Z.,Bobe R.,Grine F.,Sponheimer M.,&Wynn J.G..(2020).Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia.Proceedings of the National Academy of Sciences of the United States of America,117(36).
MLA	Negash E.W.,et al."Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia".Proceedings of the National Academy of Sciences of the United States of America 117.36(2020).