Journal ArticleDOI
Evolutionary divergence in acoustic signals: causes and consequences
TLDR
A conceptual framework for testing the relative significance of both adaptive and neutral mechanisms leading to acoustic divergence is summarized, predictions for cases where these processes lead to speciation are predicted, and how their relative importance plays out over evolutionary time are summarized.Abstract:
Acoustic signals mediate mate choice, resource defense, and species recognition in a broad range of taxa. It has been proposed, therefore, that divergence in acoustic signals plays a key role in speciation. Nonetheless, the processes driving divergence of acoustic traits and their consequences in terms of speciation are poorly understood. A review of empirical and comparative studies reveals strong support for a role of sexual selection in acoustic divergence, but the possible concomitant influences of ecological context are rarely examined. We summarize a conceptual framework for testing the relative significance of both adaptive and neutral mechanisms leading to acoustic divergence, predictions for cases where these processes lead to speciation, and how their relative importance plays out over evolutionary time.read more
Citations
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Nonverbal auditory communication - Evidence for integrated neural systems for voice signal production and perception.
TL;DR: This work proposes a re-grouping of the neural mechanisms of communication into auditory, limbic, and paramotor systems, with special consideration for a subsidiary basal-ganglia-centered system.
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Reproductive character displacement of female, but not male song discrimination in an avian hybrid zone.
David Wheatcroft,Anna Qvarnström +1 more
TL;DR: It is shown that male piedFlycatchers respond similarly to the songs of both species in sympatry and allopatry, while female pied flycatchers express stronger discrimination against heterospecific songs in symp atry than in allopAtry, consistent with RCD of song discrimination ofFemale piedflycatchers where they co‐occur with collared flycatcher, which should maintain species assortative mating.
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Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation.
Andrea Kosovac,Jes Johannesen,Oliver Krstić,Milana Mitrović,Tatjana Cvrković,Ivo Toševski,Jelena Jović +6 more
TL;DR: Evidence for cryptic species diversification within H. obsoletus is provided by consistent mitochondrial differentiation among host-associated populations in syntopy and in geographically distant areas, and average mitochondrial genetic distances are comparable to the most closely related, morphologically distinguishable species.
Journal ArticleDOI
Mountain chickadees from different elevations sing different songs: acoustic adaptation, temporal drift or signal of local adaptation?
TL;DR: Elevation-related differences in song structure in chickadees might serve as a signal for local adaptation in montane environments.
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Elevational differentiation accelerates trait evolution but not speciation rates in Amazonian birds.
TL;DR: Empirical analyses of trait divergence and diversification rates across closely related pairs of Andean and Amazonian passerine birds suggest that ecological differentiation may speed up trait evolution, but not diversification of Neotropical birds.
References
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Journal ArticleDOI
Signals, signal conditions, and the direction of evolution
TL;DR: Sensory systems, signals, signaling behavior, and habitat choice are evolutionarily coupled and should coevolve in predictable directions, determined by environmental biophysics, neurobiology, and the genetics of the suites of traits.
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Sexual selection, social competition, and speciation
TL;DR: Patterns of variation in socially selected characters demonstrate the wisdom of Darwin's distinction between natural and sexual selection, and the applicability of sexual selection theory to social competition in general.
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Ecological Sources of Selection on Avian Sounds
TL;DR: In this article, sound propagation tests were made in forest, edge, and grassland habitats in Panama to quantify pure tone and random noise band sound transmission levels, and the sounds of birds in each habitat were analyzed to determine the emphasized frequency, frequency range, and sound type (whether pure tonelike or highly modulated).
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Evidence for Ecological Speciation and Its Alternative
TL;DR: Tests of parallel evolution of reproductive isolation, trait-based assortative mating, and reproductive isolation by active selection have demonstrated that ecological speciation is a common means by which new species arise.
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Public information: from nosy neighbors to cultural evolution.
TL;DR: A large body of evidence suggests that human decision-making is strongly influenced by the behavior of others, which may then affect biological evolution.