Lower temperature as the main cause of C-4 plant declines during the glacial periods on the Chinese Loess Plateau

doi:10.1016/S0012-821X(03)00387-X

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Lower temperature as the main cause of C-4 plant declines during the glacial periods on the Chinese Loess Plateau
	Zhang, ZH; Zhao, MX; Lu, HY; Faiia, AM
	2003-09-30
发表期刊	EARTH AND PLANETARY SCIENCE LETTERS
卷号	214 期号:3-4 页码:467-481
文章类型	Article
摘要	The distribution of C-3 and C-4 plants changed in regionally contrasting ways during the last glacial period. C-4 plant expansion in low-latitude Africa and America coincided with C-4 plant decreases in Mesoamerica and the US Great Plains. This C-4 plant expansion has been attributed to lower pCO(2) and increased aridity and the decline in C-4 plants is believed to have been caused by increased winter precipitation and lower temperatures. However, it is still difficult to generalize whether pCO(2), temperature, or aridity was mainly responsible for C-3 VS. C-4 vegetation changes during glacial periods. Paleoclimate conditions on the Chinese Loess Plateau (CLP) offer opportunities to further evaluate the role of temperature in the C-3 vs. C-4 competition. Detailed climate records have shown that the CLP region was drier and colder during glacial periods, with aridity favoring C-4 expansion and lower temperatures favoring C-3 expansion. Here, we present two high-resolution compound-specific carbon isotope records of n-alkanes from the CLP as vegetation biomarkers to estimate the relative abundance Of C-4 plants during the last two glacial/interglacial transitions. More negative delta(13)C values during the glacial periods from two CLP sites clearly show that, in contrast with low-latitude sites, C-4 plants declined. This decrease in C-4 abundance was caused by lower temperature, despite the lower pCO(2) and increased aridity on the CLP during glacial time. (C) 2003 Elsevier B.V. All rights reserved.
关键词	Chinese Loess Plateau C-3/C-4 plants n-alkanes paleoclimate carbon isotope
学科领域	Geochemistry & Geophysics
DOI	10.1016/S0012-821X(03)00387-X
关键词[WOS]	CARBON-ISOTOPE DISCRIMINATION ; MAGNETIC-SUSCEPTIBILITY ; ATMOSPHERIC CO2 ; RAINFALL GRADIENT ; HIGH-RESOLUTION ; CLIMATE ; RECORD ; VARIABILITY ; HOLOCENE ; MONSOON
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000185550500007
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：142[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11866
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Zhang, ZH,Zhao, MX,Lu, HY,et al. Lower temperature as the main cause of C-4 plant declines during the glacial periods on the Chinese Loess Plateau[J]. EARTH AND PLANETARY SCIENCE LETTERS,2003,214(3-4):467-481.
APA	Zhang, ZH,Zhao, MX,Lu, HY,&Faiia, AM.(2003).Lower temperature as the main cause of C-4 plant declines during the glacial periods on the Chinese Loess Plateau.EARTH AND PLANETARY SCIENCE LETTERS,214(3-4),467-481.
MLA	Zhang, ZH,et al."Lower temperature as the main cause of C-4 plant declines during the glacial periods on the Chinese Loess Plateau".EARTH AND PLANETARY SCIENCE LETTERS 214.3-4(2003):467-481.