气候变化领域集成服务门户(CCPortal): Serial population extinctions in a small mammal indicate Late Pleistocene ecosystem instability

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DOI	10.1073/pnas.1213322109
	Serial population extinctions in a small mammal indicate Late Pleistocene ecosystem instability
	Brace S.; Palkopoulou E.; Dalén L.; Lister A.M.; Miller R.; Otte M.; Germonpré M.; Blockley S.P.E.; Stewart J.R.; Barnes I.
发表日期	2012
ISSN	0027-8424
卷号	109 期号:50
英文摘要	The Late Pleistocene global extinction of many terrestrial mammal species has been a subject of intensive scientific study for over a century, yet the relative contributions of environmental changes and the global expansion of humans remain unresolved. A defining component of these extinctions is a bias toward large species, with the majority of small-mammal taxa apparently surviving into the present. Here, we investigate the population-level history of a key tundra-specialist small mammal, the collared lemming (Dicrostonyx torquatus), to explore whether events during the Late Pleistocene had a discernible effect beyond the large mammal fauna. Using ancient DNA techniques to sample across three sites in North-West Europe, we observe a dramatic reduction in genetic diversity in this species over the last 50,000 y. We further identify a series of extinction-recolonization events, indicating a previously unrecognized instability in Late Pleistocene small-mammal populations, which we link with climatic fluctuations. Our results reveal climate-associated, repeated regional extinctions in a keystone prey species across the Late Pleistocene, a pattern likely to have had an impact on the wider steppe-tundra community, and one that is concordant with environmental change as a major force in structuring Late Pleistocene biodiversity.
英文关键词	Megafauna; Modelling; Palaeoclimate; Palaeogenetics
语种	英语
scopus关键词	DNA; article; biodiversity; ecosystem; environmental change; Europe; genetic variability; lemming; nonhuman; prey; priority journal; radiometric dating; small mammal; Upper Pleistocene; Animals; Arvicolinae; Biodiversity; Climate Change; DNA, Mitochondrial; Ecosystem; Europe; Evolution, Molecular; Extinction, Biological; Fossils; Molecular Sequence Data; Paleontology; Phylogeny; Population Dynamics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158997
作者单位	Brace, S., School of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, United Kingdom; Palkopoulou, E., Department of Molecular Systematics, Swedish Museum of Natural History, 104 05 Stockholm, Sweden, Department of Zoology, Stockholm University, 106 91 Stockholm, Sweden; Dalén, L., Department of Molecular Systematics, Swedish Museum of Natural History, 104 05 Stockholm, Sweden; Lister, A.M., Department of Earth Sciences, Natural History Museum, London SW7 5BD, United Kingdom; Miller, R., Service of Prehistory, University of Liège, 4000 Liège, Belgium; Otte, M., Service of Prehistory, University of Liège, 4000 Liège, Belgium; Germonpré, M., Department of Geography, Royal Holloway University of London, Egham, Surrey TW20 0EX, United Kingdom; Blockley, S.P.E., Department of Palaeontology, Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium; Stewart, J.R., School of Applied Sciences, Bournemouth University, Poole, Dorset BH12 5BB, United Kingdom; Barnes, I., Sc...
推荐引用方式 GB/T 7714	Brace S.,Palkopoulou E.,Dalén L.,et al. Serial population extinctions in a small mammal indicate Late Pleistocene ecosystem instability[J],2012,109(50).
APA	Brace S..,Palkopoulou E..,Dalén L..,Lister A.M..,Miller R..,...&Barnes I..(2012).Serial population extinctions in a small mammal indicate Late Pleistocene ecosystem instability.Proceedings of the National Academy of Sciences of the United States of America,109(50).
MLA	Brace S.,et al."Serial population extinctions in a small mammal indicate Late Pleistocene ecosystem instability".Proceedings of the National Academy of Sciences of the United States of America 109.50(2012).