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Age and origin of enigmatic megaherbs from the subantarctic islands Nature Precedings
Steven J. Wagstaff; Ilse Breitwieser; Christopher Quinn; Motomi Ito.
Biogeographic relationships in the southern hemisphere have puzzled biologists for the last two centuries. Once joined to form the supercontinent Gondwana, Africa, Antarctica, Australia, New Zealand and South America are widely separated by the Pacific and Indian oceans. Sir Joseph Hooker was the first to suggest that Antarctica served as a corridor for plant migration not unlike the land-bridges in the northern hemisphere. While the Antarctic flora was largely erased by glaciation during the Pleistocene, at least some of these Antarctic plant communities found refuge on the subantarctic islands. Here we provide support for the hypothesis that giant herbs persisted in the subantactic islands prior to the onset of Pleistocene glaciation, then dispersed...
Tipo: Manuscript Palavras-chave: Ecology; Plant Biology; Evolutionary Biology.
Ano: 2007 URL:
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