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| Phylogeography of the Chalcophaps Doves in DeRaad, Manthey, Ostrow, ... et Moyle, 2021. |
Highlights:
• Phylogenetic reconstruction supports current taxonomy.
• Discordant nuclear and mitochondrial ancestry near contact zone.
• Isolation by distance and hierarchical population structure within clades.
• Low overall diversity despite a large and fragmented geographic distribution.
Abstract
Chalcophaps is a morphologically conserved genus of ground-walking doves distributed from India to mainland China, south to Australia, and across the western Pacific to Vanuatu. Here, we reconstruct the evolutionary history of this genus using DNA sequence data from two nuclear genes and one mitochondrial gene, sampled from throughout the geographic range of Chalcophaps. We find support for three major evolutionary lineages in our phylogenetic reconstruction, each corresponding to the three currently recognized Chalcophaps species. Despite this general concordance, we identify discordant mitochondrial and nuclear ancestries in the subspecies C. longirostris timorensis, raising further questions about the evolutionary history of this Timor endemic population. Within each of the three species, we find evidence for isolation by distance or hierarchical population structure, indicating an important role for geography in the diversification of this genus. Despite being distributed broadly across a highly fragmented geographic region known as a hotspot for avian diversification, the Chalcophaps doves show modest levels of phenotypic and genetic diversity, a pattern potentially explained by strong population connectivity owing to high overwater dispersal capability.
Keywords: Phylogeography, Evolution, Isolation by distance, Mitonuclear discordance, Phylogenetics, Chalcophaps
Devon A. DeRaad, Joseph D. Manthey, Emily N. Ostrow, Lucas H. DeCicco, Michael J. Andersen, Peter A. Hosner, Hannah T. Shult, Leo Joseph, John P. Dumbacher and Robert G.. Moyle. 2021. Population Connectivity Across A highly Fragmented Distribution: Phylogeography of the Chalcophaps Doves. Molecular Phylogenetics and Evolution. 166; 107333. DOI: 10.1016/j.ympev.2021.107333
Emerald Dove
