Sexual Dichromatism Drives Diversification within a Major Radiation of African Amphibians

dc.contributor.authorPortik, Daniel
dc.contributor.authorBell, Rayna
dc.contributor.authorBlackburn, David
dc.contributor.authorBauer, Aaron
dc.contributor.authorBarratt, Christopher
dc.contributor.authorBranch, William
dc.contributor.authorBurger, Marius
dc.contributor.authorChanning, Alan
dc.contributor.authorColston, Timothy
dc.contributor.authorConradie, Werner
dc.contributor.authorDehling, J.
dc.contributor.authorDrewes, Robert
dc.contributor.authorErnst, Raffael
dc.contributor.authorGreenbaum, Eli
dc.contributor.authorGvozdik, Vaclav
dc.contributor.authorHarvey, James
dc.contributor.authorHillers, Annika
dc.contributor.authorHirschfeld, Mareike
dc.contributor.authorJongsma, Gregory
dc.contributor.authorKielgast, Jos
dc.contributor.authorKouete, Marcel
dc.contributor.authorLawson, Lucinda
dc.contributor.authorLeache, Adam
dc.contributor.authorLoader, Simon
dc.contributor.authorLoetters, Stefan
dc.contributor.authorVan Der Meijden, Arie
dc.contributor.authorMenegon, Michele
dc.contributor.authorMueller, Susanne
dc.contributor.authorNagy, Zoltan
dc.contributor.authorOfori-Boateng, Caleb
dc.contributor.authorOhler, Annemarie
dc.contributor.authorPapenfuss, Theodore
dc.contributor.authorRoessler, Daniela
dc.contributor.authorSinsch, Ulrich
dc.contributor.authorRoedel, Mark-Oliver
dc.contributor.authorVeith, Michael
dc.contributor.authorVindum, Jens
dc.contributor.authorZassi-Boulou, Ange-Ghislain
dc.contributor.authorMcGuire, Jimmy A.
dc.date.accessioned2019-12-20T03:00:16Z
dc.date.available2019-12-20T03:00:16Z
dc.date.issued2019
dc.description.abstractTheory predicts that sexually dimorphic traits under strong sexual selection, particularly those involved with intersexual signaling, can accelerate speciation and produce bursts of diversification. Sexual dichromatism (sexual dimorphism in color) is widely used as a proxy for sexual selection and is associated with rapid diversification in several animal groups, yet studies using phylogenetic comparative methods to explicitly test for an association between sexual dichromatism and diversification have produced conflicting results. Sexual dichromatism is rare in frogs, but it is both striking and prevalent in African reed frogs, a major component of the diverse frog radiation termed Afrobatrachia. In contrast to most other vertebrates, reed frogs display female-biased dichromatism in which females undergo color transformation, often resulting in more ornate coloration in females than in males. We produce a robust phylogeny of Afrobatrachia to investigate the evolutionary origins of sexual dichromatism in this radiation and examine whether the presence of dichromatism is associated with increased rates of net diversification. We find that sexual dichromatism evolved once within hyperoliids and was followed by numerous independent reversals to monochromatism. We detect significant diversification rate heterogeneity in Afrobatrachia and find that sexually dichromatic lineages have double the average net diversification rate of monochromatic lineages. By conducting trait simulations on our empirical phylogeny, we demonstrate that our inference of trait-dependent diversification is robust. Although sexual dichromatism in hyperoliid frogs is linked to their rapid diversification and supports macroevolutionary predictions of speciation by sexual selection, the function of dichromatism in reed frogs remains unclear. We propose that reed frogs are a compelling system for studying the roles of natural and sexual selection on the evolution of sexual dichromatism across micro- and macroevolutionary timescales.
dc.format.extent859–875
dc.identifier1063-5157
dc.identifier.citationPortik, Daniel, Bell, Rayna, Blackburn, David, Bauer, Aaron, Barratt, Christopher, Branch, William, Burger, Marius, Channing, Alan, Colston, Timothy, Conradie, Werner, Dehling, J., Drewes, Robert, Ernst, Raffael, Greenbaum, Eli, Gvozdik, Vaclav, Harvey, James, Hillers, Annika, Hirschfeld, Mareike, Jongsma, Gregory, Kielgast, Jos, Kouete, Marcel, Lawson, Lucinda, Leache, Adam, Loader, Simon, Loetters, Stefan et al. 2019. "<a href="https://repository.si.edu/handle/10088/101220">Sexual Dichromatism Drives Diversification within a Major Radiation of African Amphibians</a>." <em>Systematic Biology</em>, 68, (6) 859–875. <a href="https://doi.org/10.1093/sysbio/syz023">https://doi.org/10.1093/sysbio/syz023</a>.
dc.identifier.issn1063-5157
dc.identifier.urihttps://hdl.handle.net/10088/101220
dc.publisherOxford University Press
dc.relation.ispartofSystematic Biology 68 (6)
dc.titleSexual Dichromatism Drives Diversification within a Major Radiation of African Amphibians
dc.typearticle
sro.description.unitNMNH
sro.description.unitNH-Vertebrate Zoology
sro.identifier.doi10.1093/sysbio/syz023
sro.identifier.itemID153624
sro.identifier.refworksID71182
sro.identifier.urlhttps://repository.si.edu/handle/10088/101220
sro.publicationPlaceOxford, England

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