气候变化领域集成服务门户(CCPortal): Population genetics of Ice Age brown bears

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DOI	10.1073/pnas.040453097
	Population genetics of Ice Age brown bears
	Leonard J.A.; Wayne R.K.; Cooper A.
发表日期	2000
ISSN	0027-8424
起始页码	1651
结束页码	1654
卷号	97 期号:4
英文摘要	The Pleistocene was a dynamic period for Holarctic mammal species, complicated by episodes of glaciation, local extinctions, and intercontinental migration. The genetic consequences of these events are difficult to resolve from the study of present-day populations. To provide a direct view of population genetics in the late Pleistocene, we measured mitochondrial DNA sequence variation in seven permafrost-preserved brown bear (Ursus arctos) specimens, dated from 14,000 to 42,000 years ago. Approximately 36,000 years ago, the Beringian brown bear population had a higher genetic diversity than any extant North American population, but by 15,000 years ago genetic diversity appears similar to the modern day. The older, genetically diverse, Beringian population contained sequences from three clades now restricted to local regions within North America, indicating that current phylogeographic patterns may provide misleading data for evolutionary studies and conservation management. The late Pleistocene phylogeographic data also indicate possible colonization routes to areas south of the Cordilleran ice sheet.
语种	英语
scopus关键词	article; bear; biodiversity; genetic analysis; nonhuman; nucleotide sequence; phylogeny; population genetics; priority journal; Alaska; Animals; Arctic Regions; Climate; Cytochrome b Group; DNA, Mitochondrial; Genetics, Population; Ice; Molecular Sequence Data; Paleontology; Sequence Analysis; Ursidae; Mammalia; Ursus arctos
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/159015
作者单位	Leonard, J.A., Dept. Organismic Biol., Ecol. Evol., University of California, Los Angeles, CA 90095-1606, United States; Wayne, R.K., Dept. Organismic Biol., Ecol. Evol., University of California, Los Angeles, CA 90095-1606, United States; Cooper, A., Depts. of Biol. Anthropol. and Zool., University of Oxford, Oxford OX2 6QS, United Kingdom
推荐引用方式 GB/T 7714	Leonard J.A.,Wayne R.K.,Cooper A.. Population genetics of Ice Age brown bears[J],2000,97(4).
APA	Leonard J.A.,Wayne R.K.,&Cooper A..(2000).Population genetics of Ice Age brown bears.Proceedings of the National Academy of Sciences of the United States of America,97(4).
MLA	Leonard J.A.,et al."Population genetics of Ice Age brown bears".Proceedings of the National Academy of Sciences of the United States of America 97.4(2000).