Ecological speciation in Darwin's finches: Ghosts of finches future

被引:1
|
作者
Podos, Jeffrey [1 ,2 ]
Schroeder, Katie M. [2 ]
机构
[1] Univ Massachusetts Amherst, Dept Biol, Amherst, MA 01003 USA
[2] Univ Massachusetts Amherst, Grad Program Organism & Evolutionary Biol, Amherst, MA 01003 USA
基金
美国国家科学基金会;
关键词
SPECIES RECOGNITION; BEAK MORPHOLOGY; REPRODUCTIVE ISOLATION; CORRELATED EVOLUTION; ADAPTIVE RADIATION; SYMPATRIC MORPHS; VOCAL EVOLUTION; SONG EVOLUTION; BODY-SIZE; POPULATION;
D O I
10.1126/science.adj4478
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The theory of ecological speciation posits that adaptive divergence among incipient species raises incidental barriers to reproduction, thus catalyzing the emergence of new species. In this study, we conducted an experimental test of this theory in Gal & aacute;pagos finches, a clade in which beaks and mating songs are mechanistically linked. We forecasted the acoustic structure of songs for a set of possible evolutionary futures (successive droughts spurring increasingly large beaks) and, in a field assay, presented resulting song simulations to territorial males. We found that responses to songs dropped off after six simulated drought events, to degrees roughly comparable to drops in response to songs that diverged through cultural drift and acoustic adaptation. Our results support, in Darwin's finches, the feasibility and mechanistic bases of an ecological speciation hypothesis.
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页数:6
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