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Published on: November 26, 2012
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Song evolution, speciation, and vocal learning in passerine birds.
Nicholas A Mason1,2, Kevin J Burns3, Joseph A Tobias4
1Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, 14853.
Evolution; International Journal of Organic Evolution
|December 25, 2016
Summary
Speciation rates and vocal evolution are linked, especially in birds with learned songs. This study reveals that bursts in vocal evolution coincide with speciation events in passerines, highlighting the role of learned behaviors.
Area of Science:
- Evolutionary biology
- Behavioral ecology
- Speciation research
Background:
- Phenotypic divergence drives reproductive isolation and speciation.
- Macroevolutionary studies often overlook behavioral traits like vocalizations.
- The developmental mode of behavioral traits may influence evolutionary rates.
Purpose of the Study:
- Investigate rate shifts in vocal evolution and speciation.
- Compare learned (oscine) versus innate (suboscine) song evolution.
- Assess the link between vocal evolution, speciation tempo, and developmental modes.
Main Methods:
- Phylogenetic analysis of two passerine clades (Thraupidae and Furnariidae).
- Examined rates of vocal evolution and speciation.
- Compared evolutionary rates between learned and innate song systems.
Main Results:
- Coincident evolutionary bursts in speciation and song evolution observed in both Thraupidae and Furnariidae.
- Higher overall rates of vocal evolution in taxa with learned songs (Thraupidae) compared to innate songs (Furnariidae).
Conclusions:
- Macroevolutionary bursts in speciation are associated with vocal evolution.
- The developmental mode of vocalizations (learned vs. innate) influences the tempo of behavioral evolution.
- Behavioral evolution, particularly vocalizations, plays a significant role in diversification.
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