DOI: 10.1016/j.gloplacha.2015.09.003
论文题名: Small mammal tooth enamel carbon isotope record of C4 grasses in late Neogene China
作者: Arppe L. ; Kaakinen A. ; Passey B.H. ; Zhang Z. ; Fortelius M.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 133 起始页码: 288
结束页码: 297
语种: 英语
英文关键词: C4 vegetation
; Carbon isotopes
; East Asian Monsoon
; Laser ablation
; Rodent
; Tooth enamel
Scopus关键词: Ablation
; Atmospheric thermodynamics
; Ecology
; Ecosystems
; Enamels
; Isotopes
; Laser ablation
; Mammals
; Mass spectrometry
; Vegetation
; Carbon isotopes
; East Asian monsoon
; Environmental change
; Isotope ratio mass spectrometry
; Rodent
; Sensitive indicator
; Spatiotemporal patterns
; Vegetation structure
; Tooth enamel
; ablation
; carbon isotope
; carbonate
; climate variation
; fossil record
; grass
; lagomorph
; monsoon
; Neogene
; regional climate
; rodent
; spatiotemporal analysis
; tooth
; vegetation structure
; China
; Nei Monggol
; Qinghai-Xizang Plateau
; Yunnan
; Lagomorpha
; Mammalia
; Poaceae
; Rodentia
英文摘要: The spatiotemporal pattern of the late Cenozoic spread of C4 vegetation is an important indicator of environmental change that is intertwined with the uplift of the Himalaya and Tibetan Plateau, and the development of the East Asian monsoons. To explore the spread of C4 vegetation in China and shed new light on regional climatic evolution, we measured δ13C values of more than 200 small mammal teeth (primarily rodents and lagomorphs) using a laser ablation isotope ratio mass spectrometry approach. Small mammals are highly sensitive indicators of their environment because they have limited spatial ranges and because they have minimal time-averaging of carbon isotope signatures of dietary components. The specimens originate from four classic Late Miocene fossil localities, Lufeng, Yuanmou, Lingtai, and Ertemte, along a southwest-northeast transect from Yunnan Province to Inner Mongolia. In Yunnan (Lufeng, Yuanmou) and on the Loess Plateau (Lingtai), the small mammal δ13C values record nearly pure C3 ecosystems, and mixed but C3-based ecosystems, respectively, in agreement with previous studies based on carbon isotopes of large herbivores and soil carbonates. In Inner Mongolia, the micromammalian tooth enamel δ13C record picks up the presence of C4 vegetation where large mammal samples do not, indicating a mixed yet C3-dominated ecosystem at ~6 Ma. As a whole, the results support a scenario of northward increasing C4 grass abundance in a pattern that mirrors northward decreasing precipitation of the summer monsoon system. The results highlight differences between large and small mammals as indicators of C4 vegetation in ancient ecosystems, particularly the ability of small mammal δ13C values to detect the presence of minor components of the vegetation structure. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942280139&doi=10.1016%2fj.gloplacha.2015.09.003&partnerID=40&md5=916ae8e989dd12608e8b08d496895f69
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11483
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Finnish Museum of Natural History, University of Helsinki, P.O.Box 64, Helsinki, Finland
Recommended Citation:
Arppe L.,Kaakinen A.,Passey B.H.,et al. Small mammal tooth enamel carbon isotope record of C4 grasses in late Neogene China[J]. Global and Planetary Change,2015-01-01,133.