Evidence of taxon cycles in an Indo-Pacific passerine bird radiation (Aves: <i>Pachycephala</i> )
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- Knud Andreas Jønsson
- Center for Macroecology, Evolution and Climate at the Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
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- Martin Irestedt
- Department of Biodiversity Informatics and Genetics, Swedish Museum of Natural History, PO Box 50007, Stockholm 104 05, Sweden
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- Les Christidis
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
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- Sonya M. Clegg
- Environmental Futures Centre and Griffith School of Environment, Griffith University, Gold Coast Campus, Queensland 4222, Australia
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- Ben G. Holt
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot SL5 7PY, UK
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- Jon Fjeldså
- Center for Macroecology, Evolution and Climate at the Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
抄録
<jats:p> Many insular taxa possess extraordinary abilities to disperse but may differ in their abilities to diversify and compete. While some taxa are widespread across archipelagos, others have disjunct (relictual) populations. These types of taxa, exemplified in the literature by selections of unrelated taxa, have been interpreted as representing a continuum of expansions and contractions (i.e. taxon cycles). Here, we use molecular data of 35 out of 40 species of the avian genus <jats:italic>Pachycephala</jats:italic> (including 54 out of 66 taxa in <jats:italic>Pachycephala pectoralis</jats:italic> ( <jats:italic>sensu lato</jats:italic> ), to assess the spatio-temporal evolution of the group. We also include data on species distributions, morphology, habitat and elevational ranges to test a number of predictions associated with the taxon-cycle hypothesis. We demonstrate that relictual species persist on the largest and highest islands across the Indo-Pacific, whereas recent archipelago expansions resulted in colonization of all islands in a region. For co-occurring island taxa, the earliest colonists generally inhabit the interior and highest parts of an island, with little spatial overlap with later colonists. Collectively, our data support the idea that taxa continuously pass through phases of expansions and contractions (i.e. taxon cycles). </jats:p>
収録刊行物
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- Proceedings of the Royal Society B: Biological Sciences
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Proceedings of the Royal Society B: Biological Sciences 281 (1777), 20131727-, 2014-02-22
The Royal Society