Data/hora: 16/06/2024 05:31:05

Provedor de dados: | 17
País: | United Kingdom
Título: | Age and origin of enigmatic megaherbs from the subantarctic islands
Autores: | Steven J. Wagstaff; Ilse Breitwieser; Christopher Quinn; Motomi Ito.
Data: | 2007-10-28
Ano: | 2007
Palavras-chave: | Ecology; Plant Biology; Evolutionary Biology.
Resumo: | 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 northward in response to glacial advance. Our findings provide further evidence that Antarctica has played a pivotal role in shaping southern hemisphere biogeography.
Tipo: | Manuscript

Identificador:

http://precedings.nature.com/documents/1272/version/1

oai:nature.com:10101/npre.2007.1272.1

http://hdl.handle.net/10101/npre.2007.1272.1

Fonte: | Nature Precedings
Fonte: | Creative Commons Attribution 3.0 License