DOI: 10.1016/j.palaeo.2015.02.026
论文题名: Megafauna extinction in South America: A new chronology for the Argentine Pampas
作者: Prado J.L. ; Martinez-Maza C. ; Alberdi M.T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 425 起始页码: 41
结束页码: 49
语种: 英语
英文关键词: Late Pleistocene
; Megafauna extinction
; Pampas
; Radiocarbon date
; South America
英文摘要: The megafauna extinction in South America was one of the most profound events, with the loss of 50 genera (~. 83%). Three orders disappeared (Notoungulata, Proboscidea, Litopterna), as did all large xenarthrans, but how this fits into global extinction is uncertain, mainly due to the lack of chronological resolution. In recent years there has been an increase in the number of radiocarbon dating at archeological and paleontological sites, but this information varies greatly from area to area in South America, and few data can be considered to constitute a taxon-date.The timing of the late Pleistocene extinction in the Pampas is poorly established. Most taxa only appear in the biostratigraphic context and many reported 14C dates do not meet rigorous criteria for accepting dates, including reports suggesting survival of megafauna into the Holocene. In the present paper, we evaluate the published radiocarbon dates in the pampas and present 20 new radiocarbon dates for paleontological sites in order to establish a more accurate "extinction window" for the key taxa. These new dates are sufficiently robust to assess correspondences among last-appearance records of megafauna, first-appearance records of humans, and the Younger Dryas to Holocene climatic transition in the Argentine Pampas. These results highlight the need for greater effort in taxa selection for dating. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68982
Appears in Collections: 过去全球变化的重建
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作者单位: INCUAPA CONICET, Universidad Nacional del Centro de la provincia de Buenos Aires, Del Valle, 5737, Olavarría, Argentina; Departamento de Paleobiología, MuseoNacional de CienciasNaturales, CSIC, José Gutiérrez Abascal 2, Madrid, Spain
Recommended Citation:
Prado J.L.,Martinez-Maza C.,Alberdi M.T.. Megafauna extinction in South America: A new chronology for the Argentine Pampas[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,425