气候变化领域集成服务门户(CCPortal): Pliocene expansion of C4 vegetation in the Core Monsoon Zone on the Indian Peninsula

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DOI	10.5194/cp-16-2533-2020
	Pliocene expansion of C4 vegetation in the Core Monsoon Zone on the Indian Peninsula
	Dunlea A.G.; Giosan L.; Huang Y.
发表日期	2020
ISSN	1814-9324
起始页码	1
结束页码	16
卷号	16 期号:6
英文摘要	The expansion of C4 vegetation during the Neogene was one of the largest reorganizations of Earth's terrestrial biome. Once thought to be globally synchronous in the late Miocene, site-specific studies have revealed differences in the timing of the expansion and suggest that local conditions play a substantial role. Here, we examine the expansion of C4 vegetation on the Indian Peninsula since the late Miocene by constructing a ĝ1/46-million-year paleorecord with marine sediment from the Bay of Bengal at Site U1445, drilled during International Ocean Discovery Program Expedition 353. Analyses of element concentrations indicate that the marine sediment originates from the Mahanadi River in the Core Monsoon Zone (CMZ) of the Indian Peninsula. Hydrogen isotopes of the fatty acids of leaf waxes reveal an overall decrease in the CMZ precipitation since the late Miocene. Carbon isotopes of the leaf wax fatty acids suggest C4 vegetation on the Indian Peninsula existed before the end of the Miocene but expanded to even higher abundances during the mid-Pliocene to mid-Pleistocene (ĝ1/43.5 to 1.5 million years ago). Similar to the CMZ on the Indian Peninsula, a Pliocene expansion or re-expansion has previously been observed in northwest Australia and in East Africa, suggesting that these tropical ecosystems surrounding the Indian Ocean remained highly sensitive to changes in hydroclimate after the initial spread of C4 plants in late Miocene. © 2020 Copernicus GmbH. All rights reserved.
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183625
作者单位	Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, United States
推荐引用方式 GB/T 7714	Dunlea A.G.,Giosan L.,Huang Y.. Pliocene expansion of C4 vegetation in the Core Monsoon Zone on the Indian Peninsula[J],2020,16(6).
APA	Dunlea A.G.,Giosan L.,&Huang Y..(2020).Pliocene expansion of C4 vegetation in the Core Monsoon Zone on the Indian Peninsula.Climate of the Past,16(6).
MLA	Dunlea A.G.,et al."Pliocene expansion of C4 vegetation in the Core Monsoon Zone on the Indian Peninsula".Climate of the Past 16.6(2020).