Global song divergence in barn swallows (Hirundo rustica): exploring the roles of genetic, geographical and climatic distance in sympatry and allopatry

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Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Oxford Univ Press

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Divergence in acoustic signals plays an important role in the production and maintenance of biodiversity in numerous taxa. In this study, we assess patterns of acoustic divergence in geographically isolated and sympatric subspecies of barn swallows (Hirundo rustica), including analyses of whether song differentiation varies with geographical isolation, genetic distance and climatic distance. We provide the first description of geographical variation in song among five of six currently recognized barn swallow subspecies. Temporal traits describing terminal trills were the most distinct song traits among subspecies, adding to growing evidence that trills are important in speciation among many birds, insects and fish. Across a similar to 6000 km transect of Russia, acoustic distance was predicted by genetic and geographical distance, but not climatic distance. We also found no reproductive character displacement of song traits in a contact zone between H. r. rustica and H. r. tytleri. Based on patterns discovered in this study, we infer an important role of sexual selection, genetic and/or cultural drift in the gradual build-up of acoustic divergence, which is accelerated in small populations.

Açıklama

Shen, Sheng-Feng/0000-0002-0631-6343; Karaardic, Hakan/0000-0001-9839-4201; Wilkins, Matthew/0000-0002-3162-6749

Anahtar Kelimeler

acoustic adaptation, acoustic divergence, barn swallow, birdsong, ecological selection, Hirundo rustica, neutral drift, reproductive character displacement, sexual selection, speciation

Kaynak

Biological Journal of the Linnean Society

WoS Q Değeri

N/A

Scopus Q Değeri

Q2

Cilt

123

Sayı

4

Künye