Five species of Eurasian birds displayed a range of mitochondrial DNA phylogeographic structures, including a single widespread lineage (common sandpiper), two geographically unsorted and closely related lineages (long-tailed tit), three partially overlapping closely related lineages (reed bunting), and two divergent geographically isolated lineages that rival species distinction (red-breasted flycatcher and skylark). Only the red-breasted flycatcher and the skylark displayed congruent phylogeographic structures. These five species represent different stages of diversification and speciation. There was little evidence that natural selection had influenced mitochondrial NADH dehydrogenase subunit 2 (ND2) sequences. In several instances, population growth was hypothesized, based on haplotype distributions within populations.
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Acknowledgments We are grateful to B. Eddy, H. Furguson and to the late G. Eddy for funding fieldwork. Additional support came from the National Science Foundation (NSF) (DEB 9707496 and DEB 0212832) and the Dayton-Wilkie Natural History fund. We thank the
- Gene flow
- Mismatch distribution
- Mitochondrial DNA (mtDNA)
- Population structure
- Species limits