globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.01.017
论文题名:
Spatiotemporal variation in the origin of C4 grasses: δ13C analysis of grass pollen from the southeastern United States
作者: Nelson D.M.; Urban M.A.; Hu F.S.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 396
起始页码: 227
结束页码: 231
语种: 英语
英文关键词: C4 ; Carbon dioxide ; Carbon isotopes ; Claiborne Group ; Grass ; Pollen
英文摘要: The C4-plant functional type is a major evolutionary and ecological success. However, the relative importance of environmental factors, such as climatic conditions and atmospheric CO2 concentrations, in driving the origin of C4 grasses in different parts of the world remains poorly understood. We determined the carbon-isotope composition of 612 individual grains of grass pollen in seven sediment samples from the southeastern United States from the middle/late Eocene. By applying a Bayesian model to these data, we determined the probability of rejecting (at p<0.05) the null model that each sample contained pollen from only C3 grasses. We could not reject the null hypothesis for any sample when using a range of potential values of δ13C of atmospheric CO2. These results suggest that C4 grasses were not present on the landscape during the middle/late Eocene, a conclusion consistent with a limited number of studies from more northern and western regions of North America. In contrast, prior studies indicate that C4 grasses existed during this time in parts of Europe and South America. Together these results imply variations in the location, time, and environmental conditions associated with the origin of C4 grasses. © 2014 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69457
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: University of Maryland Center for Environmental Science, Appalachian Laboratory, 301 Braddock Road, Frostburg, MD 21532, United States; Program in Ecology, Evolution and Conservation Biology, University of Illinois, 505 South Goodwin Ave, Urbana, IL 61801, United States; Department of Plant Biology, University of Illinois, 505 South Goodwin Ave, Urbana, IL 61801, United States; Department of Geology, University of Illinois, 505 South Goodwin Ave, Urbana, IL 61801, United States

Recommended Citation:
Nelson D.M.,Urban M.A.,Hu F.S.. Spatiotemporal variation in the origin of C4 grasses: δ13C analysis of grass pollen from the southeastern United States[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,396
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Nelson D.M.]'s Articles
[Urban M.A.]'s Articles
[Hu F.S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Nelson D.M.]'s Articles
[Urban M.A.]'s Articles
[Hu F.S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Nelson D.M.]‘s Articles
[Urban M.A.]‘s Articles
[Hu F.S.]‘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.