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首页> 外文期刊>Molecular phylogenetics and evolution >Explosive avian radiations and multi-directional dispersal across Wallacea: Evidence from the Campephagidae and other Crown Corvida (Aves)
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Explosive avian radiations and multi-directional dispersal across Wallacea: Evidence from the Campephagidae and other Crown Corvida (Aves)

机译：爆炸性鸟类辐射和整个华莱士犬的多方向扩散：来自Campephegidae和其他Crown Corvida的证据（Aves）

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摘要

The systematic relationships among avian families within Crown Corvida have been poorly studied so far and as such been of limited use for biogeographic interpretations. The group has its origin in Australia and is thought to have colonized Africa and the New World via Asia beginning some 35 Mya when terranes of Australian origin approached Asian landmasses. Recent detailed tectonic mapping of the origin of land masses in the region around Wallace's line have revealed a particularly complex movement of terranes over the last 2030 Myr. Thus the biogeographic dispersal pattern of Crown Corvida is a particularly exciting case for linking vicariance and dispersal events with Earth history. Here we examine phylogenetic affinities among 72 taxa covering a broad range of genera in the basal radiations within Crown Corvida with an emphasis on Campephagidae and Pachycephalidae. Bayesian analyses of nuclear DNA sequence data identified the family Campephagidae as monophyletic but the large genus Coracina is not. Within the family Pachycephalidae the genera Pachycephala and Colluricincla are paraphyletic with respect to each other. The resulting phylogeny suggests that patterns of dispersal across Wallace's line are complex and began at least 25 Mya. We find evidence of explosive radiations and multi-directional dispersal within the last 10 Myr, and three independent long distance ocean dispersal events between Wallacea and Africa at 10-15 Mya. Furthermore, the study reveals that in the Campephagidae a complex series of dispersal events rather than vicariance is the most likely explanation for the current biogeographic pattern in the region. (C) 2008 Elsevier Inc. All rights reserved.
机译：到目前为止，Corvida皇冠内鸟类家庭之间的系统关系研究很少，因此在生物地理解释中用途有限。该组织起源于澳大利亚，被认为是通过亚洲殖民非洲和新大陆的，始于约35个Mya，当时澳大利亚起源的地雷接近亚洲陆地。最近对华莱士线周围区域的地块起源的详细构造图显示，在最近的2030年Myr期间，地球运动特别复杂。因此，Crown Corvida的生物地理分布格局是一个特别令人兴奋的案例，它可以将变异性和传播事件与地球历史联系起来。在这里，我们研究了72个类群之间的亲缘关系，涵盖了科维达冠内基本辐射中的广泛属，重点是弯头目科和头目科。贝叶斯对核DNA序列数据的分析表明，弯曲菌科是单系的，而大型科拉科纳科则不是。在Pachycephalidae科中，Pachycephala和Colluricincla属彼此共生。所形成的系统发育表明，在华莱士系中的扩散模式很复杂，至少开始于25个Mya。我们发现在最近的10 Myr内有爆炸性辐射和多方向扩散的证据，以及华莱士和非洲在10-15 Mya之间发生的三个独立的远距离海洋扩散事件。此外，研究表明，在金龟科中，一系列复杂的散布事件而不是疏离是对该地区当前生物地理格局的最可能解释。 （C）2008 Elsevier Inc.保留所有权利。

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