Social selection parapatry in an Afrotropical sunbird

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dc.creatorMcEntee, Jay P.
dc.creatorPeñalba, Joshua V.
dc.creatorWerema, Chacha
dc.creatorMulungu, Elia
dc.creatorMbilinyi, Maneno
dc.creatorMoyer, David
dc.creatorHansen, Louis A.
dc.creatorFjeldså, Jon
dc.creatorBowie, Rauri C. K.
dc.date2016-07-14T20:46:59Z
dc.date2016-07-14T20:46:59Z
dc.date2016-05
dc.date.accessioned2021-05-03T13:29:42Z
dc.date.available2021-05-03T13:29:42Z
dc.descriptionThe extent of range overlap of incipient and recent species depends on the type and magnitude of phenotypic divergence that separates them, and the consequences of phenotypic divergence on their interactions. Signal divergence by social selection likely initiates many speciation events, but may yield niche-conserved lineages predisposed to limit each others' ranges via ecological competition. Here we examine this neglected aspect of social selection speciation theory in relation to the discovery of a non-ecotonal species border between sunbirds. We find that Nectarinia moreaui and N. fuelleborni meet in a ∼6 km wide contact zone, as estimated by molecular cline analysis. These species exploit similar bioclimatic niches, but sing highly divergent learned songs, consistent with divergence by social selection. Cline analyses suggest that within-species stabilizing social selection on song-learning predispositions maintains species differences in song despite both hybridization and cultural transmission. We conclude that ecological competition between moreaui and fuelleborni contributes to the stabilization of the species border, but that ecological competition acts in conjunction with reproductive interference. The evolutionary maintenance of learned song differences in a hybrid zone recommend this study system for future studies on the mechanisms of learned song divergence and its role in speciation. This article is protected by copyright. All rights reserved.
dc.identifierMcEntee, J.P., Peñalba, J.V., Werema, C., Mulungu, E., Mbilinyi, M., Moyer, D., Hansen, L., Fjeldsaa, J. and Bowie, R.C., 2016. Social selection parapatry in Afrotropical sunbirds. Evolution.
dc.identifierhttp://hdl.handle.net/20.500.11810/3190
dc.identifier10.1111/evo.12950
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3190
dc.languageen
dc.publisherWiley
dc.subjectHybrid zone
dc.subjectBird song
dc.subjectCline
dc.subjectSpecies borders
dc.subjectHZAR
dc.subjectSexual selection
dc.titleSocial selection parapatry in an Afrotropical sunbird
dc.typeJournal Article, Peer Reviewed

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