globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.11.012
论文题名:
Carbon isotope analyses reveal relatively high abundance of C4 grasses during early-middle Miocene in southwestern Europe
作者: Urban M.A.; Nelson D.M.; Jiménez-Moreno G.; Hu F.S.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 443
起始页码: 10
结束页码: 17
语种: 英语
英文关键词: C4 ; Carbon isotopes ; Europe ; Grass ; Miocene ; Pollen
英文摘要: Before their rapid expansion during the late Miocene, C4 plants were generally uncommon or absent from most grasslands. Recent studies have furthered our understanding of shifts in C4 abundance prior to their late-Miocene expansion; however, the early history of C4 grasses remains poorly constrained. Distinguishing C4 grasses from C3 taxa (i.e., most trees, shrubs, herbs, and about half of all grasses) using isotopic data in the paleorecord is challenging, especially when C4 plants are in relatively low abundance. We used SPIRAL (Single Pollen Isotope Ratio AnaLysis) to measure δ13C values of individual grass-pollen grains in early-middle Miocene sediments from three sites in Spain where grass pollen represents 5-20% of the pollen assemblages, including 25 samples from Rubielos de Mora, (20.3-15.5Ma), seven from Gor (15.2-13.7Ma) and seven from Andalucía A1 (13.7-10.1Ma). Results indicate that C4-grass abundance varied between 21 and 72% of total grasses during the early-middle Miocene. C4 grasses are uncommon (10-20% of the grass flora) in this region today, and thus C4-grass abundance likely decreased after the early-middle Miocene as the region became cooler and precipitation shifted to the winter months. This pattern contrasts with that of a late-Miocene expansion of C4 grasses in many other regions of the world. Our results thus help elucidate the history of grasslands in Europe and the spatiotemporal dynamics of C4 grasses worldwide. © 2015 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68602
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Evolution, and Conservation Biology, University of Illinois, Urbana, IL, United States; University of Maryland Center for Environmental Science, Appalachian Laboratory, Frostburg, MD, United States; Department of Stratigraphy and Paleontology, University of Granada, Granada, Spain; Department of Plant Biology, University of Illinois, Urbana, IL, United States; Department of Geology, University of Illinois, Urbana, IL, United States

Recommended Citation:
Urban M.A.,Nelson D.M.,Jiménez-Moreno G.,et al. Carbon isotope analyses reveal relatively high abundance of C4 grasses during early-middle Miocene in southwestern Europe[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,443
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Urban M.A.]'s Articles
[Nelson D.M.]'s Articles
[Jiménez-Moreno G.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Urban M.A.]'s Articles
[Nelson D.M.]'s Articles
[Jiménez-Moreno G.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Urban M.A.]‘s Articles
[Nelson D.M.]‘s Articles
[Jiménez-Moreno G.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.