Habitat-dependent song divergence at subspecies level in the grey-breasted wood-wren
Habitat-dependent song divergence at subspecies level in the grey-breasted wood-wren
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DOI：
10.1111/j.1420-9101.2008.01536.x
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发表时间：
2008-07-01
影响因子：
2.1
通讯作者：
Slabbekoorn, H.
中科院分区：
文献类型：
--
作者：
Dingle, C.;Halfwerk, W.;Slabbekoorn, H.
从理论上讲，不同种群之间的歌声差异会导致生殖差异和物种形成。尽管有许多研究，但这一理论仍然存在争议。栖息地的差异已被证明影响歌唱，但很少有研究寻找生态驱动的声学和遗传差异之间的联系。我们测试了环境选择是否在厄瓜多尔的两个遗传上不同但杂交的灰胸林鸦亚种(Henicorhina Leucoprys)中导致了歌声的差异。几个声学特征显示出亚种之间的显著差异。两个亚种的栖息地之间存在显着差异，歌唱光谱差异与环境噪声特征相关。时间上的歌声差异也与预期的植被密度相对应。然而，就混响的量化水平而言，我们发现与栖息地相关的声音传播特性没有显著差异。我们的结论是，生态位隔离可能解释了两个亚种之间的声学差异。由此产生的与栖息地相关的歌唱分歧可能通过指导近亲条件下的分类交配而导致生殖分歧，或者只是目前有助于在二次接触时维持生殖隔离。
Song divergence among populations can theoretically lead to reproductive divergence and speciation. Despite many studies, this theory is still controversial. Habitat differences have been shown to shape songs, but few studies have looked for a link between ecologically driven acoustic and genetic divergence. We tested whether environmental selection has driven song divergence in two genetically distinct, but hybridizing, subspecies of the grey-breasted wood-wren (Henicorhina leucophrys) in Ecuador. Several acoustic features showed significant divergence between the subspecies. Spectral song divergence correlated with ambient noise profiles which differed significantly between the habitats of both subspecies. Temporal song divergence also corresponded as expected to vegetation density. However, in terms of quantified levels of reverberations, we found no significant differences in habitat-dependent sound transmission properties. We conclude that ecological niche segregation may explain acoustic divergence among the two wren subspecies. The resulting habitat-dependent song divergence may have contributed to reproductive divergence by guiding assortative mating in parapatric conditions or just currently contribute to maintenance of reproductive isolation upon secondary contact.