Carbon and oxygen isotopic evidence for diets, environments and niche differentiation of early Pleistocene pandas and associated mammals in South China

doi:10.1016/j.palaeo.2016.12.015

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	Carbon and oxygen isotopic evidence for diets, environments and niche differentiation of early Pleistocene pandas and associated mammals in South China
	Stacklyn, Shannon 1,2; Wang, Yang 1,2,3,4; Jin, Chang-zhu 4; Wang, Yuan 4; Sun, Fajun 1,2; Zhang, Chunfu 5; Jiang, Shijun 3; Deng, Tao4,6
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2017-02-15
卷号	468 页码:351-361
关键词	Fossils Tooth Enamel Habitats Paleoclimate C-4 Grasses Yanliang Cave Longgu Cave
DOI	10.1016/j.palaeo.2016.12.015
文献子类	Article
英文摘要	To better understand the dietary evolution and habitat change of pandas, this study analyzed the stable carbon and oxygen isotope compositions of tooth enamel samples from the early Pleistocene pandas Ailuropoda microta and Ailuropoda wulingshanensis and their associated mammals recovered from Yanliang Cave and Longgu Cave in South China. The enamel delta C-13 values indicate that mammals living in these cave areas during the early Pleistocene had C-3-based diets but some individuals consumed small amounts of C-4 grasses. This suggests that C-4 grasses were present in the region during the early Pleistocene, likely in patches of open areas (or savanna woodlands) in a predominantly forested landscape. The delta C-13 and delta O-18 data clearly show niche partitioning among panda, pig, and other animals. The pandas had the lowest enamel-delta C-13 values among all mammals examined, indicating that these early Pleistocene pandas had pure C-3 diets composed of plants growing in the under stories of closed -canopy forests. A pure C-3 diet for these ancient pandas is consistent with an already established dietary niche of bamboo (a C-3 plant) in the early Pleistocene. These ancient pandas also had higher delta O-18 values than all other contemporaneous mammals (except the deer at Longgu Cave), suggesting that they did not drink as much as other large mammals did. The available isotope data suggest that pygmy panda (A. microta) was less ecologically flexible compared to other mammals such as pig, rhino, deer and bovid. The limited ecological flexibility of pygmy panda may have contributed to its demise during climatic fluctuations in the Pleistocene. The reconstructed delta O-18 values of meteoric water in the study areas during the early Pleistocene are lower than the present-day mean annual precipitation delta O-18 values in the region, suggesting a wetter climate or stronger summer monsoon in the early Pleistocene than today. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	PALEO-ELEVATION IMPLICATIONS ; GIGANTOPITHECUS-BLACKI ; TIBETAN PLATEAU ; STABLE-ISOTOPES ; FOSSIL MAMMALS ; TOOTH ENAMEL ; GIANT PANDA ; PLANTS ; CAVE ; PALEOECOLOGY
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
WOS记录号	WOS:000394919000024
资助机构	National Science Foundation(DMR-1157490) ; State of Florida
内容类型	期刊论文
源URL	[http://124.16.247.212/handle/311034/7491]
专题	古脊椎动物与古人类研究所_图书馆1 古脊椎动物与古人类研究所_古哺乳动物研究室
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 Hydrobiol, Guangzhou, Guangdong, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 5.Ft Hays State Univ, Dept Geosci, Hays, KS 67601 USA 6.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Stacklyn, Shannon,Wang, Yang,Jin, Chang-zhu,et al. Carbon and oxygen isotopic evidence for diets, environments and niche differentiation of early Pleistocene pandas and associated mammals in South China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2017,468:351-361.
APA	Stacklyn, Shannon.,Wang, Yang.,Jin, Chang-zhu.,Wang, Yuan.,Sun, Fajun.,...&Deng, Tao.(2017).Carbon and oxygen isotopic evidence for diets, environments and niche differentiation of early Pleistocene pandas and associated mammals in South China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,468,351-361.
MLA	Stacklyn, Shannon,et al."Carbon and oxygen isotopic evidence for diets, environments and niche differentiation of early Pleistocene pandas and associated mammals in South China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 468(2017):351-361.