A positive association between population genetic differentiation and speciation rates in New World birds
A positive association between population genetic differentiation and speciation rates in New World birds
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新大陆鸟类种群遗传分化与物种形成率之间的正相关
DOI：
10.1101/085134
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
R. T. Brumfield
中科院分区：
文献类型：
--
作者：
Michael G. Harvey;Glenn F. Seeholzer;B. Smith;D. Rabosky;Andrés M. Cuervo;J. Klicka;R. T. Brumfield
虽然物种形成生物学的一个隐含假设是种群分化是进化多样化的一个重要阶段，但它的真正意义在很大程度上尚未得到验证。如果一个物种内的种群分化与其在进化过程中的物种形成率有关，那么分化的原因也可能是驱动生物多样性在时间和空间上的动态变化的原因。或者，地理变异可能是短暂的实体，其形成率与物种形成率无关，在这种情况下，分化的原因将只有短暂的影响。结合种群遗传学数据集，包括来自176个新世界鸟类物种的17，746个个体，以及从系统发育数据估计的物种形成率，我们表明物种内的种群分化率可以预测它们在长时间尺度上的物种形成率。虽然种群分化率解释了物种形成率的相对较小的方差，但两者之间的关系对于种群水平和物种水平数据集的采样和分析的不同策略是稳健的。种群分化比物种形成至少快三到五倍，这表明大多数种群是短暂的。种群分化和物种形成率更紧密地联系在热带物种比温带物种，符合历史上更稳定的多样化动态，通过时间在热带。总的来说，我们的研究结果表明，对种群分化过程的调查可以揭示导致大规模多样性模式的因素。
Although an implicit assumption of speciation biology is that population differentiation is an important stage of evolutionary diversification, its true significance remains largely untested. If population differentiation within a species is related to its speciation rate over evolutionary time, the causes of differentiation could also be driving dynamics of organismal diversity across time and space. Alternatively, geographic variants might be short-lived entities with rates of formation that are unlinked to speciation rates, in which case the causes of differentiation would have only ephemeral impacts. Combining population genetics datasets including 17,746 individuals from 176 New World bird species with speciation rates estimated from phylogenetic data, we show that the population differentiation rates within species predict their speciation rates over long timescales. Although relatively little variance in speciation rate is explained by population differentiation rate, the relationship between the two is robust to diverse strategies of sampling and analyzing both population-level and species-level datasets. Population differentiation occurs at least three to five times faster than speciation, suggesting that most populations are ephemeral. Population differentiation and speciation rates are more tightly linked in tropical species than temperate species, consistent with a history of more stable diversification dynamics through time in the Tropics. Overall, our results suggest investigations into the processes responsible for population differentiation can reveal factors that contribute to broad-scale patterns of diversity.
影响因子：
64.8
作者：
Jetz, W.;Thomas, G. H.;Mooers, A. O.
通讯作者：
Mooers, A. O.
北美广泛分布的鸣鸟的隐秘多样性：棕爬行鸟（Certhia americana）的系统发育地理学。
影响因子：
4.1
作者：
Manthey,JosephD;Klicka,John;Spellman,GarthM
通讯作者：
Spellman,GarthM