DOI: 10.1016/j.palaeo.2013.10.008
论文题名: Climate and humans set the place and time of Proboscidean extinction in late Quaternary of South America
作者: Lima-Ribeiro M.S. ; Nogués-Bravo D. ; Terribile L.C. ; Batra P. ; Diniz-Filho J.A.F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392 起始页码: 546
结束页码: 556
语种: 英语
英文关键词: Broken Zig-Zag model
; Climate change
; Ecological Niche Models
; Human impact
; Late Quaternary extinctions
; Multiple causes
英文摘要: The late Quaternary extinctions have been widely debated for a long time, but the varying magnitude of human vs. climate change impacts across time and space is still an unresolved question. Here we assess the geographic range shifts in response to climate change based on Ecological Niche Models (ENMs) and modeled the timing for extinction under human hunting scenario, and both variables were used to explain the extinction dynamics of Proboscideans during a full interglacial/glacial cycle (from 126. ka to 6. ka) in South America. We found a large contraction in the geographic range size of two Proboscidean species studied (Cuvieronius hyodon and Notiomastodon platensis) across time. The largest contractions of their geographical ranges occurred in the northern part of South America, where we previously reported no evidence of coexistence among earliest humans and non-sloth megafauna, including Proboscideans. Our results herein support a strong effect of climatic changes on geographical range dynamics of Proboscideans throughout late Quaternary, although this does not fully support climate change as the single cause of their extinctions. We show that both Proboscideans were narrowly distributed on scattered patches of suitable habitats (i.e., refugia) around 11. ka, period in which the earliest humans potentially arrived in South America, increasing the population density thereafter. Under this overall unsuitable climatic condition at 11. ka, both Proboscideans would be extinct after around 550. years of human hunting, but if climatic conditions were suitable like in Last Glacial Maximum (LGM), the time-for-extinction would be at least 3 times longer under the same human hunting pressures. Thus, our findings support the "Broken Zig-Zag" model and show that South American Proboscideans might have been completely extinct due to human impacts during periods of climate crisis. We conclude, in agreement with an increasing body of evidence in the recent literature, that the late Quaternary megafaunal extinction event was the result of additive effects from different stressors, and that the relative magnitude of these impacts vary across space and time. Indeed, climate changes set the place where the Proboscideans were extinct in South America, whereas the humans set the time of these extinctions. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69550
Appears in Collections: 过去全球变化的重建
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作者单位: Departamento de Ciências Biológicas, Universidade Federal de Goiás, Campus Jataí, Cx. Postal 03, 75804-020 Jataí, GO, Brazil; Programa de Pós-graduação em Ecologia e Evolução, Universidade Federal de Goiás, Cx. Postal 131, 74001-970 Goiânia, GO, Brazil; Centre for Macroecology, Evolution and Climate, University of Copenhagen, Universitetsparken 15, 2100, Denmark; Department of Geology, Greenfield Community College, Greenfield, MA 01301, United States; Departamento de Ecologia, ICB, Universidade Federal de Goiás, Cx. Postal 131, 74001-970 Goiânia, GO, Brazil
Recommended Citation:
Lima-Ribeiro M.S.,Nogués-Bravo D.,Terribile L.C.,et al. Climate and humans set the place and time of Proboscidean extinction in late Quaternary of South America[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392