The effects of Pleistocene climate change on biotic differentiation in a montane songbird clade from Wallacea

Molecular Phylogenetics and Evolution
Nathaniel S R NgFrank E Rheindt

Abstract

The role of Pleistocene Ice Age in tropical diversification is poorly understood, especially in archipelagos, in which glaciation-induced sea level fluctuations may lead to complicated changes in land distribution. To assess how Pleistocene land bridges may have facilitated gene flow in tropical archipelagos, we investigated patterns of diversification in the rarely-collected rusty-bellied fantail Rhipidura teysmanni (Passeriformes: Rhipiduridae) complex from Wallacea using a combination of bioacoustic traits and whole-genome sequencing methods (dd-RADSeq). We report a biogeographic leapfrog pattern in the vocalizations of these birds, and uncover deep genomic divergence among island populations despite the presence of intermittent land connections between some. We demonstrate how rare instances of genetic introgression have affected the evolution of this species complex, and document the presence of double introgressive mitochondrial sweeps, highlighting the dangers of using only mitochondrial DNA in evolutionary research. By applying different tree inference approaches, we demonstrate how concatenation methods can give inaccurate results when investigating divergence in closely-related taxa. Our study highlights high levels o...Continue Reading

Citations

Sep 19, 2019·Proceedings. Biological Sciences·Balaji ChattopadhyayFrank E Rheindt
Jun 17, 2020·Molecular Ecology·Emilie CrosFrank E Rheindt
Sep 25, 2020·Scientific Reports·Keren R SadanandanFrank E Rheindt
Aug 17, 2019·Genome Biology and Evolution·Kritika M GargFrank E Rheindt
Jun 14, 2019·Scientific Reports·Keren R SadanandanShaoyuan Wu
Jan 11, 2020·Science·Frank E RheindtNathaniel S R Ng

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