Comments on M. Poole (1994) The New Zealand flora – entirely long‐distance dispersal? J. Biogeogr. 21 , 625–635 and letter from M. K. Macphail (1997) J. Biogeogr. 24 , 113–114. The origins of the New Zealand flora have been the subject of considerable debate, particularly amongst botanists discussing the relative importance of plant dispersal in the Southern Hemisphere. Wardle (1963, 1968, 1978) , although explaining some plant distributions by dispersal, has suggested that New Zealand's flora arose largely through diversification of taxa present on southern ocean lands following the break‐up of the Gondwanan supercontinent. In contrast, Raven (1973) has proposed a main route of dispersal from the Northern Hemisphere via Australia for the (sub)alpine flora of New Zealand. Pole (1994) and Macphail (1997 ) have also argued for the general importance of Australia as a source for the New Zealand flora. However, their view is more extreme. They assume that New Zealand was completely submerged during the Oligocene and that all extant plant lineages in New Zealand (both alpine and lowland) have arrived from Australia by long distance dispersal since the Miocene. Their conclusion follows from observations that in New Zealand there is a poor match between extant
Journal of Biogeography – Wiley
Published: Nov 1, 1999
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