globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.07.015
论文题名:
Cell anatomy and leaf δ13C as proxies for shading and canopy structure in a Miocene forest from Ethiopia
作者: Bush R.T.; Wallace J.; Currano E.D.; Jacobs B.F.; McInerney F.A.; Dunn R.E.; Tabor N.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Africa ; Carbon isotopes ; Fabaceae ; Foliar δ13C ; Paleoprecipitation ; Undulation index
英文摘要: Plant fossils are most commonly preserved as isolated organs, making it difficult to determine plant life habit or ecosystem structure from fossils. In particular, paleoecologists have struggled to reconstruct forest canopy structure, a character that fundamentally influences hydrology, nutrient cycling, and plant and animal life. Analyses utilizing cellular morphology and leaf carbon isotope composition have been proposed to reconstruct light regime, itself a proxy for canopy structure, and we apply these proxies to exquisitely preserved leaf fossils from the early Miocene Mush Valley site in central Ethiopia. Epidermal cell wall undulation (undulation index, UI) and carbon isotope values (δ13C) were measured for 21 fossil leaves of a legume morphospecies, "Legume 1". Five leaves of a second legume morphospecies were also analyzed using the same procedures. Carbon isotope ratios and total organic carbon content were measured for 85 additional fossil leaves belonging to at least nine morphospecies. A large range of both leaf δ13C and UI values were obtained for Legume 1, indicating that different leaves were exposed to different amounts of light, as would be expected in a closed-canopy forest. However, Legume 1 leaf UI values do not correlate with leaf δ13C values, implying that one or both of these variables is driven by factors other than light exposure. Additional modern calibrations are needed to determine the key environmental variables for each measure, as well as the influence of forest openings on preserved signatures. © 2017 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68067
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: Department of Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Road, Technological Institute, Evanston, IL 60208-3130, USA; Department of Geology and Environmental Earth Science, Miami University, 133 Culler Hall, 620 E. Spring St., Oxford, OH 45056, USA; Department of Botany, University of Wyoming, 1000 E. University Ave., Laramie, WY 82071-2000, USA; Roy M. Huffington Department of Earth Sciences, Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395, USA; Sprigg Geobiology Centre, Department of Earth Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia; Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA

Recommended Citation:
Bush R.T.,Wallace J.,Currano E.D.,et al. Cell anatomy and leaf δ13C as proxies for shading and canopy structure in a Miocene forest from Ethiopia[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Bush R.T.]'s Articles
[Wallace J.]'s Articles
[Currano E.D.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Bush R.T.]'s Articles
[Wallace J.]'s Articles
[Currano E.D.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Bush R.T.]‘s Articles
[Wallace J.]‘s Articles
[Currano E.D.]‘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.