Global diversification rates of passerine birds
Global diversification rates of passerine birds
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雀形目鸟类的全球多样化率
DOI：
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发表时间：
2003
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影响因子：
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通讯作者：
R. Ricklefs
中科院分区：
文献类型：
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作者：
R. Ricklefs
雀形目鸟类科的物种丰富度分布表明，在47个科中，有7个科的净多样化率显著高于平均水平。然而，在这些家庭的106个部落中没有过多的物种丰富度表明，这些高利率是短暂的，也许在某些情况下与构造运动或扩散事件，扩大了地理范围。因此，雀形目鸟类之间的大型分支大小不需要代表内在的关键创新，影响多样化的速度。大约有17个科和30个部落相对于其他雀形目分类群的物种太少。其中许多在生态上或地理上处于边缘地位，在澳大拉西亚地区尤其多。观察到的谱系分裂之间的时间间隔表明，灭绝已经发生约。90%的物种形成（等待时间为1.03和0.93万年）和47个现代家庭，包括5712个物种的后裔约430雀形目血统现存2400万年前。小型边缘科的物种形成和灭绝率可能低1-2个数量级。
The distribution of species richness in families of passerine birds suggests that the net rate of diversification was significantly higher than average in as many as 7 out of 47 families. However, the absence of excess species richness among the 106 tribes within these families indicates that these high rates were transient, perhaps associated in some cases with tectonic movements or dispersal events that extended geographical ranges. Thus, large clade size among passerine birds need not represent intrinsic key innovations that influence the rate of diversification. Approximately 17 families and 30 tribes have too few species relative to other passerine taxa. Many of these are ecologically or geographically marginal, being especially overrepresented in the Australasian region. Observed intervals between lineage splitting suggest that extinction has occurred ca. 90% as frequently as speciation (waiting times of 1.03 and 0.93 Myr) and that the 47 modern families comprising 5712 species descended from approximately 430 passerine lineages extant 24 Myr ago. Speciation and extinction rates among small, marginal families might be 1–2 orders of magnitude lower.