globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0810635106
论文题名:
Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum
作者: Fraser C.I.; Nikula R.; Spencer H.G.; Waters J.M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2009
卷: 106, 期:9
起始页码: 3249
结束页码: 3253
语种: 英语
英文关键词: Durvillaea antarctica ; Genetic ; Phylogeography ; Raft
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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162453
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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

Recommended Citation:
Fraser C.I.,Nikula R.,Spencer H.G.,et al. Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum[J]. Proceedings of the National Academy of Sciences of the United States of America,2009-01-01,106(9)
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