气候变化领域集成服务门户(CCPortal): Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes

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DOI	10.1016/j.palaeo.2019.03.021
	Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes
	Sun F.; Wang Y.; Wang Y.; Jin C.-Z.; Deng T.; Wolff B.
发表日期	2019
ISSN	0031-0182
起始页码	1
结束页码	12
卷号	524
英文摘要	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 δ 13 C 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-δ 13 C 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 δ 18 O w values are lower than the annual average δ 18 O 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, δ 18 O values of the obligate drinkers (pigs, rhinos, bovids) display an overall decreasing trend, accompanied by increased range of δ 18 O 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. © 2019
英文关键词	Baxian Cave; Fossils; Habitats; Paleoclimate; Stable isotopes; Yugong Cave
语种	英语
scopus关键词	carbon isotope; cave system; enamel; fossil record; habitat structure; hominid; mammal; oxygen isotope; paleoclimate; paleoecology; Pleistocene; regional climate; stable isotope; China; Guangxi Zhuangzu; Yanliang Cave; Ailuropoda; Ailuropoda melanoleuca; Bovidae; Cervidae; Elephantidae; Hominoidea; Homo; Mammalia; Poaceae; Suidae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150984
作者单位	Department of Earth, Ocean & Atmospheric Science, Florida State University and National High Magnetic Field Laboratory, Tallahassee, FL 32306-4100, United States; Institute of Groundwater and Earth Sciences, The Jinan University, Guangzhou, Guangdong Province 510632, China; Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Sun F.,Wang Y.,Wang Y.,et al. Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes[J],2019,524.
APA	Sun F.,Wang Y.,Wang Y.,Jin C.-Z.,Deng T.,&Wolff B..(2019).Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes.Palaeogeography, Palaeoclimatology, Palaeoecology,524.
MLA	Sun F.,et al."Paleoecology of Pleistocene mammals and paleoclimatic change in South China: Evidence from stable carbon and oxygen isotopes".Palaeogeography, Palaeoclimatology, Palaeoecology 524(2019).