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摘要
The present study evaluated the degree of differentiation between closely-related species of Blyth's leaf warbler complex (Phylloscopus reguloides s.l.) and white-tailed leaf warbler complex (Phylloscopus davisoni s.l.) by molecular (cytochrome b and 16S rRNA) and bioacoustic markers (sonagraphic analysis of songs). Molecular phylogenetic results corroborate the recently suggested splittings of the two former taxa into three and two species, respectively. By contrast to previous opinion, differentiation of territorial songs parallels the genetic diversification in both groups. In the P. reguloides group, all recently established species can be distinguished by a characteristic song pattern. Regularly structured songs composed of repeated two- or three-note syllables were found in all species of the group, whereas trill songs with single notes repeated are unique to Phylloscopus claudiae. The phylogenetic relationships of Phylloscopus occipitalis are ambiguous among different molecular trees, but song pattern clearly corroborates a close relationship to the P. reguloides group. In the white-tailed leaf warbler group, songs are irregularly structured and often descending in frequency with exception of P. davisoni and Phylloscopus ogilviegranti disturbans. Song pattern corroborates the genetic affiliation of Phylloscopus hainanus and Phylloscopus xanthoschistos to the molecular white-tailed leaf warbler clade. All target species correspond to distinct acoustic clusters resulting from discriminant analysis of several spectral and structural song parameters. Linear correlation between genetic and acoustic differentiation (pairwise p-distances versus difference of discriminant functions) is significant within both groups, except for one case, in which discriminant function 1 was correlated with a spectral parameter (minimum frequency) only.
- 出版日期2009-3
- 单位海南师范大学; 中国科学院
