Dispersal has inhibited avian diversification in Australasian archipelagoes
Dispersal has inhibited avian diversification in Australasian archipelagoes
复制标题
扩散抑制了澳大利亚群岛的鸟类多样化
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Claramunt
中科院分区：
文献类型：
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作者：
B. Weeks;S. Claramunt
不同的物种形成模型预测了谱系的扩散能力与其多样化率之间关系的对比模式。这种关系在孤立限制模型中预计为负关系，在创始人事件模型中为正关系。此外，扩散对物种形成的负面和正面影响的结合可以导致在中等扩散能力水平下更高的多样化率。使用分子系统发育来估计多样化率，并使用翅膀形态来估计扩散能力，我们分析了扩散对澳大利亚群岛鸟类区系多样化的影响。与岛屿系统分散性的预期相反，分散能力和多样化率之间的关系是单调负的。虽然多种机制可以产生这种模式，但它们都共享一个与物种形成脱钩的范围扩展阶段。
Different models of speciation predict contrasting patterns in the relationship between the dispersal ability of lineages and their diversification rates. This relationship is expected to be negative in isolation-limited models and positive in founder-event models. In addition, the combination of negative and positive effects of dispersal on speciation can result in higher diversification rates at intermediate levels of dispersal ability. Using molecular phylogenies to estimate diversification rates, and wing morphology to estimate dispersal ability, we analysed the influence of dispersal on diversification in the avifauna of Australasian archipelagoes. Contrary to expectations given the fragmented nature of island systems, the relationship between dispersal ability and diversification rate was monotonically negative. While multiple mechanisms could generate this pattern, they all share a phase of range expansion that is decoupled from speciation.