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首页> 美国卫生研究院文献>Proceedings of the Royal Society B: Biological Sciences >The assembly of montane biotas: linking Andean tectonics and climatic oscillations to independent regimes of diversification in Pionus parrots
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The assembly of montane biotas: linking Andean tectonics and climatic oscillations to independent regimes of diversification in Pionus parrots

机译：山地生物群系的组装：将安第斯构造和气候波动与美洲豹鹦鹉的独立多样化机制联系起来

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The mechanisms underlying the taxonomic assembly of montane biotas are still poorly understood. Most hypotheses have assumed that the diversification of montane biotas is loosely coupled to Earth history and have emphasized instead the importance of multiple long-distance dispersal events and biotic interactions, particularly competition, for structuring the taxonomic composition and distribution of montane biotic elements. Here we use phylogenetic and biogeographic analyses of species in the parrot genus Pionus to demonstrate that standing diversity within montane lineages is directly attributable to events of Earth history. Phylogenetic relationships confirm three independent biogeographic disjunctions between montane lineages, on one hand, and lowland dry-forest/wet-forest lineages on the other. Temporal estimates of lineage diversification are consistent with the interpretation that the three lineages were transported passively to high elevations by mountain building, and that subsequent diversification within the Andes was driven primarily by Pleistocene climatic oscillations and their large-scale effects on habitat change. These results support a mechanistic link between diversification and Earth history and have general implications for explaining high altitudinal disjuncts and the origin of montane biotas.
机译：山区生物群的分类学组装基础的机制仍知之甚少。大多数假设都假定山地生物区系的多样性与地球历史之间存在松散耦合，相反，它强调了多个长距离散布事件和生物相互作用（尤其是竞争）对于构建山地生物成分的分类学组成和分布的重要性。在这里，我们使用鹦鹉属Pionus物种的种系发育和生物地理学分析，证明山地血统中的常设多样性直接归因于地球历史事件。系统发生关系一方面确认了山系世系之间的三个独立的生物地理分离，另一方面又确认了低地干旱森林/湿林世系之间的三个生物地理学分离。对谱系多样化的时间估计与以下解释一致：三个谱系是通过山区建筑被动运送到高海拔的，而安第斯山脉随后的多样化主要是由更新世气候振荡及其对生境变化的大规模影响所驱动的。这些结果支持了多样化与地球历史之间的机械联系，并且对解释高度海拔分离和山地生物群系的起源具有普遍意义。

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