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Paleoenvironment of the late Miocene Shuitangba hominoids from Yunnan, Southwest China: Insights from stable isotopes

文献类型：期刊论文

作者Sun, Fajun9,10; Wang, Yang9,10; Jablonski, Nina G.8; Hou, Sukuan6,7; Ji, Xueping4,5; Wolff, Burt9,10; Tripati, Aradhna3; Cao, Jiayong2; Yang, Xin1
刊名CHEMICAL GEOLOGY
出版日期2021-05-20
卷号569页码:12
关键词Late Miocene Stable isotopes Paleoclimate Tooth enamel Shells Clumped isotopes
ISSN号0009-2541
DOI10.1016/j.chemgeo.2021.120123
通讯作者Sun, Fajun(fs15b@my.fsu.edu)
英文摘要The Late Miocene witnessed significant changes in climate globally and was an important time in the evolution of hominoids. Here, we report the results of an isotopic study of Late Miocene mammalian teeth and freshwater shells from Shuitangba (Yunnan Province, China) - an important refugium for hominoids, and reconstruct paleoenvironmental conditions in the area. delta C-13 values of fossil enamel samples range from -15.5 parts per thousand to -1.0 parts per thousand, with a mean of -11.3 +/- 2.3 parts per thousand, and delta O-18 values vary from -14.2 to -4.6 parts per thousand, averaging -9.7 +/- 2.2 parts per thousand. Reconstructed diet-delta C-13 values for these fossil mammals indicate that although they fed mostly on C-3 plants, many of them consumed some C-4 vegetation. This suggests that the local ecosystem contained C-4 grasses but was dominated by C-3 plants. The intra-tooth delta O-18 variation of fossil herbivores is larger than what is found in modern herbivores. Reconstructed paleo-meteoric water delta O-18(w) values are on average lower than those inferred from modern samples and also lower than the average delta O-18(w) values of modern precipitation in the region. Similarly, delta O-18 values of fossil freshwater shells display a larger seasonal variation and are significantly lower than modern shells from Fuxian Lake in the same region. Thus, the delta O-18 data from both mammalian teeth and freshwater mollusk shells support a wetter climate, possibly with a stronger precipitation seasonality in the Late Miocene than today. Comparison of clumped isotope temperatures from fossil and modern shells suggests a mean annual temperature of similar to 15 to 16 degrees C in the Shuitangba area in the Late Miocene, which is similar to 3 to 4 degrees C higher than that of today. Taken together, our isotope results suggest that C-4 grasses existed in local ecosystems in the area, likely in patches of grasslands or wooded grasslands in a mostly forested environment in the Late Miocene when the local and regional climate was warmer and wetter than today. Comparison of the delta C-13 records from Yunnan and the Siwalik region suggests that C-4 biomass spread earlier in the Indian subcontinent on the southwest side of the Tibetan Plateau than in Yunnan on the southeast side of the Plateau. The transition from a relatively wet habitat to a more open and drier habitat is also more pronounced and begins earlier in the Siwalik region, relative to Yunnan. These regional differences in climate and ecosystem evolution may be linked to the unique growth history of the Himalayan-Tibetan Plateau.
资助项目United States National Science Foundation[BCS-0321893] ; United States National Science Foundation[BCS1035897] ; United States National Science Foundation[BCS-1227964] ; United States National Science Foundation[BCS-1227927] ; United States National Science Foundation[BCS-1227838] ; Chinese Academy of Science[XDA20070203] ; Chinese Academy of Science[XDB26000000] ; College of Liberal Arts of the Pennsylvania State University ; Yunnan Natural Science Foundation[2010CC010] ; Department of Earth, Ocean, & Atmospheric Science at Florida State University ; National Science Foundation[DMR-1644779] ; State of Florida ; Bryn Mawr College
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000637385500001
出版者ELSEVIER
资助机构United States National Science Foundation ; Chinese Academy of Science ; College of Liberal Arts of the Pennsylvania State University ; Yunnan Natural Science Foundation ; Department of Earth, Ocean, & Atmospheric Science at Florida State University ; National Science Foundation ; State of Florida ; Bryn Mawr College
源URL[http://119.78.100.205/handle/311034/18495]  
专题古脊椎动物与古人类研究所_图书馆1
通讯作者Sun, Fajun
作者单位1.Zhaoyang Museum, Zhaotong 657000, Peoples R China
2.Zhaotong Inst Cultural Rel Protect & Archaeol, Zhaotong 657000, Peoples R China
3.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Dept Atmospher & Ocean Sci,Ctr Diverse Leadership, Inst Environm & Sustainabil,Amer Indian Studies C, Los Angeles, CA 90095 USA
4.Res Ctr Southeast Asian Archeol, Kunming 650118, Yunnan, Peoples R China
5.Yunnan Inst Cultural Rel & Archaeol, Kunming 650118, Yunnan, Peoples R China
6.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
7.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
8.Penn State Univ, Dept Anthropol, University Pk, PA 16802 USA
9.Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
10.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA
推荐引用方式
GB/T 7714		 Sun, Fajun,Wang, Yang,Jablonski, Nina G.,et al. Paleoenvironment of the late Miocene Shuitangba hominoids from Yunnan, Southwest China: Insights from stable isotopes[J]. CHEMICAL GEOLOGY,2021,569:12.
APA Sun, Fajun.,Wang, Yang.,Jablonski, Nina G..,Hou, Sukuan.,Ji, Xueping.,...&Yang, Xin.(2021).Paleoenvironment of the late Miocene Shuitangba hominoids from Yunnan, Southwest China: Insights from stable isotopes.CHEMICAL GEOLOGY,569,12.
MLA Sun, Fajun,et al."Paleoenvironment of the late Miocene Shuitangba hominoids from Yunnan, Southwest China: Insights from stable isotopes".CHEMICAL GEOLOGY 569(2021):12.

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来源：古脊椎动物与古人类研究所

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