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Journal of Arid Land  2011, Vol. 3 Issue (2): 104-113    DOI: 10.3724/SP.J.1227.2011.00104
Research Articles     
A cladistic scenario of Southern Pacific biogeographical history based on Nothofagus dispersal and vicariance analysis
1 Key Laboratory of Biogeography and Bioresources in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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Abstract  Nothofagus is regarded as a key group for interpreting Southern Pacific biogeographical history. Based on a molecular phylogenetic tree, a quantitative dispersal-vicariance analysis (DIVA) of the genus is presented. The results indicate that the ancestral area of Nothofagus is a broad realm almost including the total extant distribution pattern of the genus rather than a so-named center of origin. Integrated with the paleogeography, the time of origin and subsequent diversification is inferred to have started in the Late Cretaceous. Most vicariance and dispersal events should be contained in that period. Vicariance events versus dispersal events play a dominant rule in speciation. The dispersal events are hypothesized to happen from the Late Cretaceous to Eocene in terms of the geological history. Rich fossils are collected in the Eocene. South America, comprising three subgenera of Nothofagus, should be considered as a diversification region, in which the distribution of the species of subgenus Fuscospora and subgenus Nothofagus are explained by dispersal events during the Late Cretaceous-Late Eocene.

Key wordsPopulus euphratica      population      static life table      survivorship curve      survival analysis      development index      time sequence     
Received: 09 November 2010      Published: 07 June 2011

Important Direction for Knowledge Innovation Project, CAS (KZCX2-EW-305)

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Cite this article:

MingLi ZHANG. A cladistic scenario of Southern Pacific biogeographical history based on Nothofagus dispersal and vicariance analysis. Journal of Arid Land, 2011, 3(2): 104-113.

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