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DOI	10.1016/j.palaeo.2020.109586
	Late Pleistocene and Late Holocene environment and climate in the campos region of southeastern South America inferred from phytolith, diatom and geochemical data
	Mourelle, Dominique 1; del Puerto, Laura 1; Perez, Laura 1; Bergamino, Leandro 1; Garcia-Rodriguez, Felipe 1,2
通讯作者	Mourelle, Dominique
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2020
卷号	543
英文摘要	A paleolimnological study was undertaken for a sediment core from Laguna Formosa, a subtropical lake in the northern campos inland region of Uruguay. The record encompasses a Late Pleistocene and Late Holocene interval, interrupted by a hiatus. We analyzed (1) opal phytoliths and diatoms to infer the regional environment, climate, and changes in lake trophic state, and (2) total carbon and nitrogen (TC and TN) and stable isotope data (delta C-13 and delta N-15) to infer organic matter sources and composition. Findings indicate that, in Late Pleistocene times, a cool, semi-arid or highly seasonal climate existed, with a dominance of C3 grasslands and riparian hydrophilous shrublands while the shallow freshwater environment was characterized by benthic diatoms and littoral macrophytes. Late Holocene times were initially characterized by a temperate and humid or sub-humid climate, and dominance of grasslands and bunch grasses, while Laguna Formosa was dominated by phytoplankton. The abundance and diversity of littoral hydrophilic vegetation, and riparian forest vegetation, increased progressively over time, as a result of increased rainfall, from ca. 1800 cal yr BP and the onset of a subtropical (temperate and humid) climate by ca. 1300 cal yr BP. Such inferences are in close agreement with an earlier palynological study of Laguna Formosa, and support the paleoclimatic models for the Late Pleistocene and Late Holocene of southeastern South America.
英文关键词	Diatoms Opal phytoliths delta C-13 delta N-15 campos region Rio de la Plata grassland
类型	Article
语种	英语
国家	Uruguay ; Brazil
收录类别	SCI-E
WOS记录号	WOS:000518707600003
WOS关键词	SEA-SURFACE TEMPERATURE ; ARAUCARIA FOREST ; SAO-FRANCISCO ; PALEOLIMNOLOGICAL EVIDENCE ; MULTIVARIATE-ANALYSIS ; PAULA REGION ; CARBON FLOW ; FRESH-WATER ; VEGETATION ; DYNAMICS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315277
作者单位	1.Univ Republ, Ctr Univ Reg Este, Rocha, Uruguay; 2.Univ Fed Rio Grande, Inst Oceanog, Programa Posgrad Oceanol, Rio Grande, Brazil
推荐引用方式 GB/T 7714	Mourelle, Dominique,del Puerto, Laura,Perez, Laura,et al. Late Pleistocene and Late Holocene environment and climate in the campos region of southeastern South America inferred from phytolith, diatom and geochemical data[J],2020,543.
APA	Mourelle, Dominique,del Puerto, Laura,Perez, Laura,Bergamino, Leandro,&Garcia-Rodriguez, Felipe.(2020).Late Pleistocene and Late Holocene environment and climate in the campos region of southeastern South America inferred from phytolith, diatom and geochemical data.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,543.
MLA	Mourelle, Dominique,et al."Late Pleistocene and Late Holocene environment and climate in the campos region of southeastern South America inferred from phytolith, diatom and geochemical data".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 543(2020).