Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes

doi:10.1016/j.palaeo.2019.03.021

IVPP-IR > 中科院古脊椎所（2000年以后）

	Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes
	Sun, Fajun 1,2; Wang, Yang 1,2,3,4; Wang, Yuan 4; Jin, Chang-zhu 4; Deng, Tao4 ; Wolff, Burt 1,2
	2019-06-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	524 期号:0 页码:1-12
摘要	The role of climate change in the evolution and diversification of hominoids remains a hotly debated issue. Stable isotope analyses of fossil mammals that coexisted with the hominoids can provide insights into hominoid palaeoenvironments and shed light on this debate. Here, we report results of stable carbon and oxygen isotope analyses of tooth enamel samples from a variety of Pleistocene mammals including pandas, deer, elephants, pigs, rhinos, and bovids from two hominoid fossil localities (Yugong Cave and Baxian Cave) in South China. Enamel delta C-13 values indicate that most of the mammals living in the study area during the late Middle Pleistocene had C-3-based diets but a small number of individuals consumed some C-4 grasses. This indicates the presence of C-4 plants in the region during the late Middle Pleistocene, most likely in patches of open areas in a predominantly forested environment. However, during the early Late Pleistocene, all of the mammals examined had C-3-based diets, except one bovid and one panda that may have ingested small amounts of C-4 plants. This indicates a dense forested environment with little C-4 grasses during the early Late Pleistocene. Like the Early Pleistocene pygmy panda (Ailuropoda microta) from Yanliang Cave, the late Middle Pleistocene Ailuropoda baconi from Yugong Cave and the early Late Pleistocene Ailuropoda melanoleuca from Baxian Cave had higher mean diet-delta C-13 values than other co-occurring herbivores, indicating they preferred relatively open forest habitats and had more restricted diets compared to other mammals. The reconstructed mean paleo-meteoric water delta O-18(w) values are lower than the annual average delta O-18(w) value of modern precipitation in the region, suggesting that the climatic conditions during the times when these Pleistocene mammals were alive were colder and/or wetter than today. In addition, delta O-18 values of the obligate drinkers (pigs, rhinos, bovids) display an overall decreasing trend, accompanied by increased range of delta O-18 variations, from the Early Pleistocene to the early Late Pleistocene. This suggests that the regional climate became colder and/or wetter, with increased seasonality, from the Early Pleistocene to the early Late Pleistocene, likely related to intensified glaciation. The change in climate to colder conditions may be responsible for the extinction of the Gigantopithecus in this region.
关键词	Fossils Stable isotopes Habitats Paleoclimate Yugong Cave Baxian Cave
DOI	10.1016/j.palaeo.2019.03.021
关键词[WOS]	TIBETAN PLATEAU ; ENVIRONMENTAL-CHANGE ; DIET ; DISCRIMINATION ; ECOLOGY ; ARIDITY ; PLANTS ; TOOTH ; BONE ; RECONSTRUCTION
收录类别	SCI
语种	英语
资助项目	National Science Foundation[DMR-1644779] ; State of Florida
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000469154700001
出版者	ELSEVIER SCIENCE BV
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/10042
专题	中科院古脊椎所（2000年以后）
通讯作者	Sun, Fajun
作者单位	1.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA 2.Natl High Magnet Field Lab, Tallahassee, FL 32306 USA 3.Jinan Univ, Inst Groundwater & Earth Sci, Guangzhou 510632, Guangdong, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Sun, Fajun,Wang, Yang,Wang, Yuan,et al. Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,524(0):1-12.
APA	Sun, Fajun,Wang, Yang,Wang, Yuan,Jin, Chang-zhu,Deng, Tao,&Wolff, Burt.(2019).Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,524(0),1-12.
MLA	Sun, Fajun,et al."Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 524.0(2019):1-12.

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