A sexually selected character displacement in flycatchers reinforces premating isolation

Stre, Glenn-Peter; Moum, Truls; Bureš, Stanislav; Král, Miroslav; Adamjan, Martin; Moreno, Juan

doi:10.1038/42451

Cited by 485 publications

(482 citation statements)

References 23 publications

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“…For example, work on Ficedula flycatchers shows that signal similarity predicts hybridization (Qvarnström et al 2006), which in turn may drive reproductive character displacement via reinforcement (Saetre et al 1997). Why does female perception accommodate convergence in some instances but not others?…”

Section: Discussion (A) Species Recognitionmentioning

confidence: 99%

Character displacement from the receiver's perspective: species and mate recognition despite convergent signals in suboscine birds

Seddon

Tobias

2010

Proc. R. Soc. B.

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Many social animals use long-distance signals to attract mates and defend territories. They face the twin challenges of discriminating between species to identify conspecific mates, and between individuals to recognize collaborators and competitors. It is therefore often assumed that long-distance signals are under strong selection for species-specificity and individual distinctiveness, and that this will drive character displacement when closely related species meet, particularly in noisy environments. However, the occurrence of signal stereotypy and convergence in rainforest species seems to contradict these ideas, and raises the question of whether receivers in these systems can recognize species or individuals by long-distance signals alone. Here, we test for acoustically mediated recognition in two sympatric antbird species that are known to have convergent songs. We show that male songs are stereotyped yet individually distinctive, and we use playback experiments to demonstrate that females can discriminate not only between conspecific and heterospecific males, but between mates and strangers. These findings provide clear evidence that stereotypy and convergence in male signals can be accommodated by fine tuning of perceptual abilities in female receivers, suggesting that the evolutionary forces driving divergent character displacement in animal signals are weaker than is typically assumed.

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Section: Discussion (A) Species Recognitionmentioning

confidence: 99%

Character displacement from the receiver's perspective: species and mate recognition despite convergent signals in suboscine birds

Seddon

Tobias

2010

Proc. R. Soc. B.

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“…The naturally hybridizing collared flycatcher and pied flycatcher are important avian speciation models [2][3][4][5][6][7] that show pre-as well as postzygotic isolation 8,9 . We sequenced and assembled the 1.1-Gb flycatcher genome, physically mapped the assembly to chromosomes using a low-density linkage map 10 and re-sequenced population samples of each species.…”

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confidence: 99%

“…1) are important study organisms for key aspects of evolutionary ecology and biology [2][3][4][5][6][7] . Diverged less than 2 million years ago, their history has been shaped by repeated cycles of glaciation in Eurasia where periods of allopatric divergence in refugia probably alternated with periods of secondary contact during which gene flow and selection were vital components; they still hybridize in areas of sympatry (Supplementary Figure 2).…”

mentioning

confidence: 99%

The genomic landscape of species divergence in Ficedula flycatchers

Ellegren

Smeds

Burri

et al. 2012

Nature

587

733

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Unravelling the genomic landscape of divergence between lineages is key to understanding speciation 1 . The naturally hybridizing collared flycatcher and pied flycatcher are important avian speciation models 2-7 that show pre-as well as postzygotic isolation 8,9 . We sequenced and assembled the 1.1-Gb flycatcher genome, physically mapped the assembly to chromosomes using a low-density linkage map 10 and re-sequenced population samples of each species. Here we show that the genomic landscape of species differentiation is highly heterogeneous with approximately 50 'divergence islands' showing up to 50-fold higher sequence divergence than the genomic background. These non-randomly distributed islands, with between one and three regions of elevated divergence per chromosome irrespective of chromosome size, are characterized by reduced levels of nucleotide diversity, skewed allele-frequency spectra, elevated levels of linkage disequilibrium and reduced proportions of shared polymorphisms in both species, indicative of parallel episodes of selection. Proximity of divergence peaks to genomic regions resistant to sequence assembly, potentially including centromeres and telomeres, indicate that complex repeat structures may drive species divergence. A much higher background level of species divergence of the Z chromosome, and a lower proportion of shared polymorphisms, indicate that sex chromosomes and autosomes are at different stages of speciation. This study provides a roadmap to the emerging field of speciation genomics.As lineages diverge, a combination of pre-as well as postzygotic reproductive isolation barriers will eventually arise 1 . Divergence is likely to start from specific loci that may precede and cause the evolution of reproductive incompatibility. Hybridization between diverging lineages may therefore create a genomic mosaic of regions where interspecific gene flow occurs at different rates (the genic view of speciation 11 ), with introgression expected to be weak in genomic regions involved in speciation. Revealing the genomic regions with elevated levels of divergence will eventually deepen our knowledge of the speciation process. However, more than 150 years after the publication of On the Origin of Species 12 , the genetic basis of speciation is still largely unresolved 13,14 . We know little about the identity, number and effect size of loci involved in population divergence, their genomic distribution and the type of mutations involved. Advances in sequencing technology now open a promising avenue for the study of genomic divergence, even for non-model vertebrate species with gigabase (Gb)-sized genomes.The collared flycatcher Ficedula albicollis and the pied flycatcher Ficedula hypoleuca (Fig. 1) are important study organisms for key aspects of evolutionary ecology and biology 2-7 . Diverged less than 2 million years ago, their history has been shaped by repeated cycles of glaciation in Eurasia where periods of allopatric divergence in refugia probably alternated with periods of secondary contact...

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“…In the best-known example, male pied flycatchers (Ficedula hypoleuca) have black dorsal plumage in allopatry, but in sympatry with the dominant collared flycatcher (Ficedula albicollis), most male pied flycatchers have dull, brown plumage, which resembles female collared flycatchers [13] and reduces territorial aggression from male collared flycatchers [14][15][16]. The same plumage shift also reduces the rate of cross-species mating and hybridization because female pied flycatchers prefer males with brown plumage in sympatry, which represents a reversal of the preference for black males in allopatry [17]. In another well-studied example, male Calopteryx splendens damselflies have blueblack wing spots that are larger in allopatry than in sympatry with C. virgo, which have fully blue-black wings [18,19].…”

Section: Introductionmentioning

confidence: 99%

Interspecific aggression, not interspecific mating, drives character displacement in the wing coloration of male rubyspot damselflies ( Hetaerina )

Drury¹,

Grether²

2014

Proc. R. Soc. B.

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Traits that mediate intraspecific social interactions may overlap in closely related sympatric species, resulting in costly between-species interactions. Such interactions have principally interested investigators studying the evolution of reproductive isolation via reproductive character displacement (RCD) or reinforcement, yet in addition to reproductive interference, interspecific trait overlap can lead to costly between-species aggression. Previous research on rubyspot damselflies (Hetaerina spp.) demonstrated that sympatric shifts in male wing colour patterns and competitor recognition reduce interspecific aggression, supporting the hypothesis that agonistic character displacement (ACD) drove trait shifts. However, a recent theoretical model shows that RCD overshadows ACD if the same male trait is used for both female mate recognition and male competitor recognition. To determine whether female mate recognition is based on male wing coloration in Hetaerina, we conducted a phenotype manipulation experiment. Compared to control males, male H. americana with wings manipulated to resemble a sympatric congener (H. titia) suffered no reduction in mating success. Thus, female mate recognition is not based on species differences in male wing coloration. Experimental males did, however, experience higher interspecific fighting rates and reduced survival compared to controls. These results greatly strengthen the case for ACD and highlight the mechanistic distinction between ACD and RCD.

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A sexually selected character displacement in flycatchers reinforces premating isolation

Cited by 485 publications

References 23 publications

Character displacement from the receiver's perspective: species and mate recognition despite convergent signals in suboscine birds

Character displacement from the receiver's perspective: species and mate recognition despite convergent signals in suboscine birds

The genomic landscape of species divergence in Ficedula flycatchers

Interspecific aggression, not interspecific mating, drives character displacement in the wing coloration of male rubyspot damselflies ( Hetaerina )

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