The birth of aposematism: high phenotypic divergence and low genetic diversity in a young clade of poison frogs

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dc.careerEscuela de Ciencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorRon Melo, Santiago Rafael
dc.contributor.correspondingRon, Santiago R.
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:34:38Z
dc.date.available2023-11-04T21:34:38Z
dc.date.issued2017-04
dc.dedication.authorTCes
dc.description.abstractRapid radiation coupled with low genetic divergence often hinders species delimitation and phylogeny estimation even if putative species are phenotypically distinct. Some aposematic species, such as poison frogs (Dendrobatidae), have high levels of intraspecific color polymorphism, which can lead to overestimation of species when phenotypic divergence primarily guides species delimitation. We explored this possibility in the youngest origin of aposematism (3–7 MYA) in poison frogs, Epipedobates, by comparing genetic divergence with color and acoustic divergence. We found low genetic divergence (2.6% in the 16S gene) despite substantial differences in color and acoustic signals. While chemical defense is inferred to have evolved in the ancestor of Epipedobates, aposematic coloration evolved at least twice or was lost once in Epipedobates, suggesting that it is evolutionarily labile. We inferred at least one event of introgression between two cryptically colored species with adjacent ranges (E. boulengeri and E. machalilla). We also find evidence for peripheral isolation resulting in phenotypic divergence and potential speciation of the aposematic E. tricolor from the non-aposematic E. machalilla. However, we were unable to estimate a well-supported species tree or delimit species using multispecies coalescent models. We attribute this failure to factors associated with recent speciation including mitochondrial introgression, incomplete lineage sorting, and too few informative molecular characters. We suggest that species delimitation within young aposematic lineages such as Epipedobates will require genome-level molecular studies. We caution against relying solely on DNA barcoding for species delimitation or identification and highlight the value of phenotypic divergence and natural history in delimiting species.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1711059137
dc.id.type1
dc.identifier.doihttps://doi.org/10.1016/j.ympev.2016.12.035
dc.identifier.issn1055-7903
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5330
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S1055790316304729
dc.indexed.databaseScimago Journal Rankes
dc.language.isoen
dc.list.authorsTarvin, R., Powell, E., Santos. J., Ron, S. y Cannatella, D.
dc.magazine.pageRange283-295
dc.magazine.titleScienceDirecten_US
dc.magazine.volumeChapterVolume 109
dc.rightsOpenAccessen
dc.statepublisheden_US
dc.subjectRanas venenosases
dc.subjectAnfibioses
dc.subjectEpipedobateses
dc.subjectRanas venenosas
dc.subjectAnfibios
dc.subjectEpipedobates
dc.titleThe birth of aposematism: high phenotypic divergence and low genetic diversity in a young clade of poison frogsen_US
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