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On the historical biogeography of global Galliformes: ancestral range and diversification patterns

机译：关于全球鸡形目的历史生物地理：祖先范围和多样化模式

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Background In this study, the ancestral distributional ranges and the tempo of diversification patterns of global Galliformes were investigated. Methods Different diversification models characterizing possible tempo patterns were fitted and compared onto the phylogenetic tree for the 197 Galliforme species, consisting of a constant-speciation and constant-extinction model (CONSTANT), a decreasing-speciation and constant-extinction model (SPVAR), a constant-speciation and increasing-extinction model (EXVAR) and a decreasing-speciation and increasing-extinction model (BOTHVAR). Ancestral range reconstruction was conducted using the dispersal-extinction-cladogenesis model. Results A constant-diversification-rate (CONSTANT) model best quantified the historical speciation patterns of this avian assemblage through model selection. Clade age and species richness are significantly and positively correlated. The most recent common ancestor for Galliformes species was originally found in the disjunctive regions between Southeast Asia and North America. High-frequency dispersal events were identified across the whole evolutionary time. Conclusions The constant diversification rate for global Galliforme species implied that there were no diversification rate-shifting trends for Galliformes species. The present study may contribute to the understanding of the ecology and diversity patterns of Galliformes from the perspective of historical biogeography, although some limitations existed.
机译：背景技术在本研究中，研究了全球鸡形目的祖先分布范围和多样性模式的速度。方法对表征197种鸡形目物种的不同多样性模型进行拟合，并将其与系统发育树进行比较，该模型包括恒定物种和恒定灭绝模型（CONSTANT），减少物种和恒定灭绝模型（SPVAR），一个恒定物种加消灭模型（EXVAR）和一个物种消减消灭模型（BOTHVAR）。祖先范围重建使用弥散消灭cladogenesis模型。结果通过选择模型，恒定变异率（CONSTANT）模型可以最好地量化该鸟类组合的历史物种形成模式。进化枝年龄与物种丰富度显着正相关。鸡形目物种的最新共同祖先最初发现于东南亚和北美之间的分离区域。在整个进化时间内都发现了高频分散事件。结论全球鸡形目物种的恒定多样化速率表明，鸡形目物种没有多样化的变化趋势。尽管存在一些局限性，但本研究可能有助于从历史生物地理学的角度了解鸡形目的生态学和多样性模式。

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