globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2006982117
论文题名:
Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia
作者: Negash E.W.; Alemseged Z.; Bobe R.; Grine F.; Sponheimer M.; Wynn J.G.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:36
起始页码: 21921
结束页码: 21927
语种: 英语
英文关键词: Fauna ; Herbivores ; Shungura Formation ; Stable isotopes ; Tooth enamel
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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164053
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Negash E.W.,Alemseged Z.,Bobe R.,et al. Dietary trends in herbivores from the Shungura Formation; southwestern Ethiopia[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(36)
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