globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.04.024
Scopus记录号: 2-s2.0-85018765781
论文题名:
Riparian woody vegetation history in the campos region, southeastern South America, during two time windows: late Pleistocene and late Holocene
作者: Mourelle D.; Prieto A.R.; García-Rodríguez F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 167
起始页码: 14
结束页码: 29
语种: 英语
英文关键词: Araucaria ; Brazil ; Campos ; Holocene ; Palynology ; Pleistocene ; Rio de la Plata grasslands ; Riparian forests ; Uruguay
Scopus关键词: Catchments ; Climatology ; Forestry ; Water ; Araucaria ; Brazil ; Campos ; Holocenes ; Palynology ; Pleistocene ; Rio de la Plata grasslands ; Riparian forests ; Uruguay ; Vegetation ; Araucaria
英文摘要: A detailed palynological record from Laguna Formosa (northeastern campos region, 31°S; 54°W) documents the dynamic balance between grasslands and riparian forests during the late Pleistocene (14,570 to 13,500 cal yr BP) and late Holocene (3280 cal yr BP to the present). Modern pollen-vegetation relationships and the woody pollen dispersal capacity analyses were used to improve the vegetation reconstruction. Grasslands were regionally dominant throughout the record. However, at 14,570 cal yr BP hydrophilous taxa reflect the development of riparian hydrophilous shrublands along freshwater bodies, promoting the fixation of the riverbanks, maintaining shallow, calm and clear water conditions under a relatively wet and not so cool climate. This is the first evidence of woody riparian vegetation development along freshwater bodies for the lowlands of the northern campos during the late glacial period. At 3280 cal yr BP riparian forests consisted of both hydrophilous and mesophilous woody taxa. Since 2270 cal yr BP woody vegetation gradually increased, accompanied by the incorporation of other taxa by 940 cal yr BP, and achieving a composition similar to that of the contemporary time at ca. 540 cal yr BP. The increased woody vegetation since ca. 2270 cal yr BP, and the more frequent and intense flooding events between 1800 and 1200 cal yr BP, could be related to higher precipitation over La Plata Drainage Basin, related with the high ENSO amplitude. In addition, pollen from taxa that currently no longer develops in the study area suggests connections between southern Brazil and Uruguay, and between the campos and the Chaco phytogeographic province. © 2017 Elsevier Ltd
资助项目: This research was supported by grants of CONICET (PIP 1265) and Universidad Nacional de Mar del Plata (Exa 15/E550), PEDECIBA and SNI-ANII. We are grateful to Estancia Ana Paula for permission to work, and D. Panario and R. Bracco for their support during the field work. We thank R. Bracco for dating sample URU0563, the (NSF)-Arizona AMS Facility and T. Jull for financial support for dating. To G.E. Silvestri for the information about climate of Uruguay, to Brussa and Bonifacino for the botanical information provided, and to the anonymous reviewers for their comments and suggestions.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59200
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作者单位: Centro Universitario Regional Este, CURE-Rocha, Uruguay; IIMyC, CONICET-Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Laboratorio de Paleoecología y Palinología, Funes 3250, Mar del Plata, Argentina

Recommended Citation:
Mourelle D.,Prieto A.R.,García-Rodríguez F.. Riparian woody vegetation history in the campos region, southeastern South America, during two time windows: late Pleistocene and late Holocene[J]. Quaternary Science Reviews,2017-01-01,167
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