Rapid song divergence leads to discordance between genetic distance and phenotypic characters important in reproductive isolation
| Autor: | Nwankwo, Emmanuel C., Pallari, Chryso Th., Hadjioannou, Louis, Ioannou, Andreas, Mulwa, Ronald K., Kirschel, Alexander N. G. |
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| Přispěvatelé: | Kirschel, Alexander N. G. [0000-0003-4379-7956] |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine tinkerbirds Biology Subspecies 010603 evolutionary biology 01 natural sciences molecular phylogenetics 03 medical and health sciences lcsh:QH540-549.5 morphology Ecology Evolution Behavior and Systematics Original Research Nature and Landscape Conservation vocalizations Ecology Divergence (linguistics) species limits plumage coloration Reproductive isolation 030104 developmental biology Genetic distance Evolutionary biology Plumage birds Sexual selection Molecular phylogenetics lcsh:Ecology Pogoniulus playback experiments Founder effect |
| Zdroj: | Ecology and Evolution Ecol Evol Ecology and Evolution, Vol 8, Iss 1, Pp 716-731 (2018) |
| Popis: | The criteria for species delimitation in birds have long been debated, and several recent studies have proposed new methods for such delimitation. On one side, there is a large consensus of investigators who believe that the only evidence that can be used to delimit species is molecular phylogenetics, and with increasing numbers of markers to gain better support, whereas on the other, there are investigators adopting alternative approaches based largely on phenotypic differences, including in morphology and communication signals. Yet, these methods have little to say about rapid differentiation in specific traits shown to be important in reproductive isolation. Here, we examine variation in phenotypic (morphology, plumage, and song) and genotypic (mitochondrial and nuclear DNA) traits among populations of yellow‐rumped tinkerbird Pogoniulus bilineatus in East Africa. Strikingly, song divergence between the P. b. fischeri subspecies from Kenya and Zanzibar and P. b. bilineatus from Tanzania is discordant with genetic distance, having occurred over a short time frame, and playback experiments show that adjacent populations of P. b. bilineatus and P. b. fischeri do not recognize one another's songs. While such rapid divergence might suggest a founder effect following invasion of Zanzibar, molecular evidence suggests otherwise, with insular P. b. fischeri nested within mainland P. b. fischeri. Populations from the Eastern Arc Mountains are genetically more distant, yet share the same song with P. b. bilineatus from Coastal Tanzania and Southern Africa, suggesting they would interbreed. We believe investigators ought to examine potentially rapid divergence in traits important in species recognition and sexual selection when delimiting species, rather than relying entirely on arbitrary quantitative characters or molecular markers. 8 1 716 731 |
| Databáze: | OpenAIRE |
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