Ecological drivers of song evolution in birds: Disentangling the effects of habitat and morphology

Title: Ecological drivers of song evolution in birds: Disentangling the effects of habitat and morphology
Author(s): Derryberry, EP
Seddon, N
Derryberry, GE
Claramunt, S
Seeholzer, GF
Brumfield, RT
Tobias, JA
Item Type: Journal Article
Abstract: Environmental differences influence the evolutionary divergence of mating signals through selection acting either directly on signal transmission ("sensory drive") or because morphological adaptation to different foraging niches causes divergence in "magic traits" associated with signal production, thus indirectly driving signal evolution. Sensory drive and magic traits both contribute to variation in signal structure, yet we have limited understanding of the relative role of these direct and indirect processes during signal evolution. Using phylogenetic analyses across 276 species of ovenbirds (Aves: Furnariidae), we compared the extent to which song evolution was related to the direct influence of habitat characteristics and the indirect effect of body size and beak size, two potential magic traits in birds. We find that indirect ecological selection, via diversification in putative magic traits, explains variation in temporal, spectral, and performance features of song. Body size influences song frequency, whereas beak size limits temporal and performance components of song. In comparison, direct ecological selection has weaker and more limited effects on song structure. Our results illustrate the importance of considering multiple deterministic processes in the evolution of mating signals.
Publication Date: 13-Jan-2018
Date of Acceptance: 1-Dec-2017
ISSN: 2045-7758
Publisher: Wiley
Start Page: 1890
End Page: 1905
Journal / Book Title: Ecology and Evolution
Volume: 8
Issue: 3
Copyright Statement: © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Publication Status: Published
Appears in Collections:Faculty of Natural Sciences

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