Contingency and determinism in the evolution of bird song sound frequency

Abstract Sexual signals are archetypes of contingent evolution: hyper-diverse across species, often evolving fast and in unpredictable directions. It is unclear to which extent their evolutionary unpredictability weakens deterministic evolution, or takes place bounded by deterministic patterns of tr...

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Autores principales:	Jakob I. Friis, Torben Dabelsteen, Gonçalo C. Cardoso
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f1e00c9f67674f66be4a3cf722e88249
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spelling	oai:doaj.org-article:f1e00c9f67674f66be4a3cf722e882492021-12-02T17:51:13ZContingency and determinism in the evolution of bird song sound frequency10.1038/s41598-021-90775-62045-2322https://doaj.org/article/f1e00c9f67674f66be4a3cf722e882492021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90775-6https://doaj.org/toc/2045-2322Abstract Sexual signals are archetypes of contingent evolution: hyper-diverse across species, often evolving fast and in unpredictable directions. It is unclear to which extent their evolutionary unpredictability weakens deterministic evolution, or takes place bounded by deterministic patterns of trait evolution. We compared the evolution of sound frequency in sexual signals (advertisement songs) and non-sexual social signals (calls) across > 500 genera of the crown songbird families. Contrary to the acoustic adaptation hypothesis, we found no evidence that forest species used lower sound frequencies in songs or calls. Consistent with contingent evolution in song, we found lower phylogenetic signal for the sound frequency of songs than calls, which suggests faster and less predictable evolution, and found unpredictable direction of evolution in lineages with longer songs, which presumably experience stronger sexual selection on song. Nonetheless, the most important deterministic pattern of sound frequency evolution—its negative association with body size—was stronger in songs than calls. This can be explained by songs being longer-range signals than most calls, and thus using sound frequencies that animals of a given size produce best at high amplitude. Results indicate that sexual selection can increase aspects of evolutionary contingency while strengthening, rather than weakening, deterministic patterns of evolution.Jakob I. FriisTorben DabelsteenGonçalo C. CardosoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jakob I. Friis Torben Dabelsteen Gonçalo C. Cardoso Contingency and determinism in the evolution of bird song sound frequency
description	Abstract Sexual signals are archetypes of contingent evolution: hyper-diverse across species, often evolving fast and in unpredictable directions. It is unclear to which extent their evolutionary unpredictability weakens deterministic evolution, or takes place bounded by deterministic patterns of trait evolution. We compared the evolution of sound frequency in sexual signals (advertisement songs) and non-sexual social signals (calls) across > 500 genera of the crown songbird families. Contrary to the acoustic adaptation hypothesis, we found no evidence that forest species used lower sound frequencies in songs or calls. Consistent with contingent evolution in song, we found lower phylogenetic signal for the sound frequency of songs than calls, which suggests faster and less predictable evolution, and found unpredictable direction of evolution in lineages with longer songs, which presumably experience stronger sexual selection on song. Nonetheless, the most important deterministic pattern of sound frequency evolution—its negative association with body size—was stronger in songs than calls. This can be explained by songs being longer-range signals than most calls, and thus using sound frequencies that animals of a given size produce best at high amplitude. Results indicate that sexual selection can increase aspects of evolutionary contingency while strengthening, rather than weakening, deterministic patterns of evolution.
format	article
author	Jakob I. Friis Torben Dabelsteen Gonçalo C. Cardoso
author_facet	Jakob I. Friis Torben Dabelsteen Gonçalo C. Cardoso
author_sort	Jakob I. Friis
title	Contingency and determinism in the evolution of bird song sound frequency
title_short	Contingency and determinism in the evolution of bird song sound frequency
title_full	Contingency and determinism in the evolution of bird song sound frequency
title_fullStr	Contingency and determinism in the evolution of bird song sound frequency
title_full_unstemmed	Contingency and determinism in the evolution of bird song sound frequency
title_sort	contingency and determinism in the evolution of bird song sound frequency
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f1e00c9f67674f66be4a3cf722e88249
work_keys_str_mv	AT jakobifriis contingencyanddeterminismintheevolutionofbirdsongsoundfrequency AT torbendabelsteen contingencyanddeterminismintheevolutionofbirdsongsoundfrequency AT goncaloccardoso contingencyanddeterminismintheevolutionofbirdsongsoundfrequency
_version_	1718379323454390272

Contingency and determinism in the evolution of bird song sound frequency

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