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Livistona palms in Australia: Ancient relics or opportunistic immigrants?

Citation

Crisp, MD and Isagi, Y and Kato, Y and Cook, LG and Bowman, DMJS, Livistona palms in Australia: Ancient relics or opportunistic immigrants?, Molecular Phylogenetics and Evolution, 54, (2) pp. 512-523. ISSN 1055-7903 (2010) [Refereed Article]

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DOI: doi:10.1016/j.ympev.2009.09.020

Abstract

Eighteen of the 34 species of the fan palm genus Livistona (Arecaceae) are restricted to Australia and southern New Guinea, east of Wallace’s Line, an ancient biogeographic boundary between the former supercontinents Laurasia and Gondwana. The remaining species extend from SE Asia to Africa, west of Wallace’s Line. Competing hypotheses contend that Livistona is (a) ancient, its current distribution a relict of the supercontinents, or (b) a Miocene immigrant from the north into Australia as it drifted towards Asia. We have tested these hypotheses using Bayesian and penalized likelihood molecular dating based on 4 Kb of nuclear and chloroplast DNA sequences with multiple fossil calibration points. Ancestral areas and biomes were reconstructed using parsimony and maximum likelihood. We found strong support for the second hypothesis, that a single Livistona ancestor colonized Australia from the north about 10– 17 Ma. Spread and diversification of the genus within Australia was likely favoured by a transition from the aseasonal wet to monsoonal biome, to which it could have been preadapted by fire-tolerance

Item Details

Item Type:Refereed Article
Keywords:Biogeography, Ecological transitions, Bayesian phylogenetics, Maximum likelihood, Parsimony Relaxed, molecular clock dating, cpDNA, Malate synthase, Vicariance, Dispersal, Palms, Arecaceae
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Population, Ecological and Evolutionary Genetics
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Ecosystem Adaptation to Climate Change
Author:Bowman, DMJS (Professor David Bowman)
ID Code:67521
Year Published:2010
Web of Science® Times Cited:42
Deposited By:Plant Science
Deposited On:2011-03-04
Last Modified:2011-05-13
Downloads:7 View Download Statistics

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