RATES OF MORPHOLOGICAL EVOLUTION ARE CORRELATED WITH SPECIES RICHNESS IN SALAMANDERS
RATES OF MORPHOLOGICAL EVOLUTION ARE CORRELATED WITH SPECIES RICHNESS IN SALAMANDERS
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DOI：
10.1111/j.1558-5646.2011.01557.x
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发表时间：
2012-06
期刊：
影响因子：
3.3
通讯作者：
D. Rabosky;D. Adams
中科院分区：
文献类型：
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作者：
D. Rabosky;D. Adams
物种多样化和表型进化的克里思和模式在整个生命树中变化很大，但这些过程之间的关系却知之甚少。先前对表型进化速率和物种多样化速率之间关系的测试都假设物种丰富度随着时间的推移不断增加。如果违反这一假设，简单的系统发育估计净多样化率可能没有关系的过程中，影响物种丰富度的分支之间的分布。在这里，我们证明了plethodontid蝾螈分支之间物种丰富度的变化不太可能是由简单的时间依赖性过程引起的，从而导致了关于表型进化速率与物种多样性之间关系的根本不同的结论。形态进化率的大小和形状的演变与分支物种丰富度，但不相关的净多样化，假设恒定的速率，通过时间的简单估计。物种多样性和表型进化之间的这种耦合是一致的假设，即具有高速率的形态性状进化的分支可能比具有低速率的分支多样化。我们的研究结果表明，多样性调节的基本过程的假设有重要的后果解释宏观进化模式。
The tempo and mode of species diversification and phenotypic evolution vary widely across the tree of life, yet the relationship between these processes is poorly known. Previous tests of the relationship between rates of phenotypic evolution and rates of species diversification have assumed that species richness increases continuously through time. If this assumption is violated, simple phylogenetic estimates of net diversification rate may bear no relationship to processes that influence the distribution of species richness among clades. Here, we demonstrate that the variation in species richness among plethodontid salamander clades is unlikely to have resulted from simple time‐dependent processes, leading to fundamentally different conclusions about the relationship between rates of phenotypic evolution and species diversification. Morphological evolutionary rates of both size and shape evolution are correlated with clade species richness, but are uncorrelated with simple estimators of net diversification that assume constancy of rates through time. This coupling between species diversification and phenotypic evolution is consistent with the hypothesis that clades with high rates of morphological trait evolution may diversify more than clades with low rates. Our results indicate that assumptions about underlying processes of diversity regulation have important consequences for interpreting macroevolutionary patterns.