干旱区生态环境知识资源中心(Arid): Late Holocene climate dynamics and human impact inferred from vegetation and fire history of the Caatinga, in Northeast Brazil

Arid

DOI	10.1016/j.revpalbo.2020.104299
	Late Holocene climate dynamics and human impact inferred from vegetation and fire history of the Caatinga, in Northeast Brazil
	de Moraes, Caio Alves; de Oliveira, Marcelo A. T.; Behling, Hermann
通讯作者	de Moraes, CA
来源期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
EISSN	1879-0615
出版年	2020
卷号	282
英文摘要	Holocene vegetation changes are good indicators of climate change/and or human impacts. The environmental history in the semi-arid region with Caatinga vegetation in Northeast Brazil has been still little studied. A 420 cm-long sediment core collected in a mire at the Catimbau National Park, State of Pernambuco, has been analyzed for pollen, spores, charcoal, and sedimentological characteristics. The core is dated by three AMS radiocarbon dates and is at the bottom of the core about 2800 cal yr BP old. Results indicate three different periods of sedimentological and environmental characteristics. The first period from 2800 to 2150 cal yr BP is characterized by the dominance of the pioneer tree Cecropia, and high charcoal amounts, indicative of strong environmental disturbances due to frequent fires. The vegetation compositions with less frequent ferns suggest the predominance of relatively dry conditions. In the following period between 2150 and 450 cal yr BP, the Moraceaedominated forest with ferns suggesting wetter conditions. The increased occurrence of the Orbignya palm, as well as the bean Phaseolus, combined with abundant charcoal, suggest even stronger influence of Amerindians in the area. During the last period, after 450 cal yr BP, arboreal species were replaced by herbaceous taxa, indicating more open vegetation. The fire regime has been reduced. This evidence points to the return of drier conditions and the complete decline of the Amerindian population in the area, after the arrival of European colonizers. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Paleodimate Fire history Northeast Brazil Palynology Human influence Late Holocene
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591249400008
WOS关键词	SOUTH-AMERICA ; RESUSPENSION ; PLEISTOCENE
WOS类目	Plant Sciences ; Paleontology
WOS研究方向	Plant Sciences ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327581
作者单位	[de Moraes, Caio Alves; Behling, Hermann] Univ Goettingen, Dept Palynol & Climate Dynam, Gottingen, Germany; [de Oliveira, Marcelo A. T.] Univ Fed Santa Catarina, Dept Geosci, Florianopolis, SC, Brazil
推荐引用方式 GB/T 7714	de Moraes, Caio Alves,de Oliveira, Marcelo A. T.,Behling, Hermann. Late Holocene climate dynamics and human impact inferred from vegetation and fire history of the Caatinga, in Northeast Brazil[J],2020,282.
APA	de Moraes, Caio Alves,de Oliveira, Marcelo A. T.,&Behling, Hermann.(2020).Late Holocene climate dynamics and human impact inferred from vegetation and fire history of the Caatinga, in Northeast Brazil.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,282.
MLA	de Moraes, Caio Alves,et al."Late Holocene climate dynamics and human impact inferred from vegetation and fire history of the Caatinga, in Northeast Brazil".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 282(2020).