globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0605310103
论文题名:
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska
作者: Anderson L.L.; Hu F.S.; Nelson D.M.; Petit R.J.; Paige K.N.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2006
卷: 103, 期:33
起始页码: 12447
结束页码: 12450
语种: 英语
英文关键词: Beringia ; Chloroplast ; Climate change ; Picea glauca ; Refugia
Scopus关键词: chloroplast DNA ; article ; Canada ; climate change ; fossil ; glacier ; haplotype ; landscape ; nonhuman ; North America ; nucleotide sequence ; priority journal ; Russian Federation ; sequence analysis ; species refuge ; United States ; white spruce ; Alaska ; Chloroplasts ; DNA, Plant ; Fossils ; Genetics, Population ; Haplotypes ; Ice ; Molecular Sequence Data ; North America ; Picea ; Variation (Genetics) ; Picea glauca
英文摘要: Paleorecords offer key information for evaluating model simulations of species migration in response to forecast climatic change. However, their utility can be greatly compromised by the existence of glacial refugia that are undetectable in fossil records (cryptic refugia). Despite several decades of investigation, it remains controversial whether Beringia, the largely unglaciated area extending from northeastern Siberia to the Yukon Territory, harbored small populations of certain boreal tree species during the last glaciation. Here, we present genetic evidence for the existence of a glacial refuge in Alaska that helps to resolve this long-standing controversy. We sequenced chloroplast DNA (cpDNA) of white spruce (Picea glauca), a dominant boreal tree species, in 24 forest stands across northwestern North America. The majority of cpDNA haplotypes are unique, and haplotype diversity is relatively high in Alaska, arguing against the possibility that this species migrated into the region from areas south of the Laurentide Ice Sheet after the end of the last glaciation. Thus, white spruce apparently survived long glacial episodes under climatic extremes in a heterogeneous landscape matrix. These results suggest that estimated rates of tree migration from fossil records may be too high and that the ability of trees to track anthropogenic warming may be more limited than previously thought. © 2006 by The National Academy of Sciences of the USA.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162475
Appears in Collections:气候变化与战略

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作者单位: Anderson, L.L., Program in Ecology and Evolutionary Biology, University of Illinois, Urbana, IL 61801, United States; Hu, F.S., Program in Ecology and Evolutionary Biology, University of Illinois, Urbana, IL 61801, United States, Department of Plant Biology, University of Illinois, Urbana, IL 61801, United States, Department of Geology, University of Illinois, Urbana, IL 61801, United States, University of Illinois, 265 Morrill Hall, 505 South Goodwin Avenue, Urbana, IL 61801, United States; Nelson, D.M., Program in Ecology and Evolutionary Biology, University of Illinois, Urbana, IL 61801, United States; Petit, R.J., Institut National de la Recherche Agronomique, Unité Mixte de Recherche Biodiversité, Gènes et Ecosystèmes, 69 Route d'Arcachon, F-33612 Cestas Cedex, France; Paige, K.N., Program in Ecology and Evolutionary Biology, University of Illinois, Urbana, IL 61801, United States, Department of Animal Biology, University of Illinois, Urbana, IL 61801, United States

Recommended Citation:
Anderson L.L.,Hu F.S.,Nelson D.M.,et al. Ice-age endurance: DNA evidence of a white spruce refugium in Alaska[J]. Proceedings of the National Academy of Sciences of the United States of America,2006-01-01,103(33)
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