气候变化领域集成服务门户(CCPortal): Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum

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DOI	10.1073/pnas.0810635106
	Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum
	Fraser C.I.; Nikula R.; Spencer H.G.; Waters J.M.
发表日期	2009
ISSN	0027-8424
起始页码	3249
结束页码	3253
卷号	106 期号:9
英文摘要	The end of the Last Glacial Maximum (LGM) dramatically reshaped temperate ecosystems, with many species moving poleward as temperatures rose and ice receded. Whereas reinvading terrestrial taxa tracked melting glaciers, marine biota recolonized ocean habitats freed by retreating sea ice. The extent of sea ice in the Southern Hemisphere during the LGM has, however, yet to be fully resolved, with most palaeogeographic studies suggesting only minimal or patchy ice cover in subantarctic waters. Here, through population genetic analyses of the widespread Southern Bull Kelp (Durvillaea antarctica), we present evidence for persistent ice scour affecting subantarctic islands during the LGM. Using mitochondrial and chloroplast genetic markers (COI; rbcL) to genetically characterize some 300 kelp samples from 45 Southern Ocean localities, we reveal a remarkable pattern of recent recolonization in the subantarctic. Specifically, in contrast to the marked phylogeographic structure observed across coastal New Zealand and Chile (10- to 100-km scales), subantarctic samples show striking genetic homogeneity over vast distances (10,000-km scales), with a single widespread haplotype observed for each marker. From these results, we suggest that sea ice expanded further and ice scour during the LGM impacted shallow-water subantarctic marine ecosystems more extensively than previously suggested. © 2009 by The National Academy of Sciences of the USA.
英文关键词	Durvillaea antarctica; Genetic; Phylogeography; Raft
语种	英语
scopus关键词	algal genetics; article; chloroplast; controlled study; ecosystem; genetic analysis; genetic marker; glacial period; glacier; haplotype; kelp; mitochondrion; nonhuman; phylogeography; polar ice cap; priority journal; Antarctic Regions; Haplotypes; Ice Cover; Kelp; Molecular Sequence Data; Phylogeny; Durvillaea antarctica
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/159165
作者单位	Fraser, C.I., Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King Street, Dunedin 9016, New Zealand; Nikula, R., Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King Street, Dunedin 9016, New Zealand; Spencer, H.G., Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King Street, Dunedin 9016, New Zealand; Waters, J.M., Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King Street, Dunedin 9016, New Zealand
推荐引用方式 GB/T 7714	Fraser C.I.,Nikula R.,Spencer H.G.,et al. Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum[J],2009,106(9).
APA	Fraser C.I.,Nikula R.,Spencer H.G.,&Waters J.M..(2009).Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum.Proceedings of the National Academy of Sciences of the United States of America,106(9).
MLA	Fraser C.I.,et al."Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum".Proceedings of the National Academy of Sciences of the United States of America 106.9(2009).