A positive association between population genetic differentiation and speciation rates in New World birds

摘要: Although an implicit assumption of speciation biology is that population differentiation important stage evolutionary diversification, its true significance remains largely untested. If within a species related to rate over time, the causes could also be driving dynamics organismal diversity across time and space. Alternatively, geographic variants might short-lived entities with rates formation are unlinked rates, in which case would have only ephemeral impacts. Combining genetics datasets including 17,746 individuals from 176 New World bird estimated phylogenetic data, we show predict their long timescales. relatively little variance explained by rate, relationship between two robust diverse strategies sampling analyzing both population-level species-level datasets. Population occurs at least three five times faster than speciation, suggesting most populations ephemeral. more tightly linked tropical temperate species, consistent history stable diversification through Tropics. Overall, our results suggest investigations into processes responsible for can reveal factors contribute broad-scale patterns diversity.