Iterative Ecological Radiation and Convergence during the Evolutionary History of Damselfishes (Pomacentridae)
Iterative Ecological Radiation and Convergence during the Evolutionary History of Damselfishes (Pomacentridae)
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DOI：
10.1086/668599
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发表时间：
2013-01-01
影响因子：
2.9
通讯作者：
Alfaro, Michael E.
中科院分区：
文献类型：
--
作者：
Frederich, Bruno;Sorenson, Laurie;Alfaro, Michael E.
珊瑚礁鱼类是地球上最多样化的脊椎动物群之一，但我们对其多样化模式的了解仍然有限。在这里，我们测试了雀鲷（Pomacentridae）的多样性，雀鲷是珊瑚礁相关鱼类中物种最丰富的科之一，其多样性是否是由其进化史上的一次或多次适应性辐射产生的。使用包括 208 个物种的时间校准系统发育学对谱系多样化的节奏进行测试表明，在早期多样化爆发导致单一适应性辐射的情况下，冠前中心多样化并没有像预期的那样随着时间的推移而减慢。营养性状的进化模型同样拒绝了生态重要表型多样性的早期谱系间划分的假设。相反，雀鲷被证明经历了迭代的会聚辐射，其中分支在相似的营养策略（即远洋饲养者、底栖饲养者、中间）和形态上辐射。珊瑚礁的区域化、竞争和功能限制可能促进了雀鲷的迭代生态辐射和趋同进化。通过 Pomacentridae，我们说明了辐射可能是由多样化限制的性质所强烈构造的。
Coral reef fishes represent one of the most spectacularly diverse assemblages of vertebrates on the planet, but our understanding of their mode of diversification remains limited. Here we test whether the diversity of the damselfishes (Pomacentridae), one of the most species-rich families of reef-associated fishes, was produced by a single or multiple adaptive radiation(s) during their evolutionary history. Tests of the tempo of lineage diversification using a time-calibrated phylogeny including 208 species revealed that crown pomacentrid diversification has not slowed through time as expected under a scenario of a single adaptive radiation resulting from an early burst of diversification. Evolutionary modeling of trophic traits similarly rejected the hypothesis of early among-lineage partitioning of ecologically important phenotypic diversity. Instead, damselfishes are shown to have experienced iterative convergent radiations wherein subclades radiate across similar trophic strategies (i.e., pelagic feeders, benthic feeders, intermediate) and morphologies. Regionalization of coral reefs, competition, and functional constraints may have fueled iterative ecological radiation and convergent evolution of damselfishes. Through the Pomacentridae, we illustrate that radiations may be strongly structured by the nature of the constraints on diversification.