Genomic patterns in the dwarf kingfishers of northern Melanesia reveal a mechanistic framework explaining the paradox of the great speciators DOI Creative Commons
Devon A. DeRaad,

Alexandra N Files,

Lucas H. DeCicco

et al.

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(6), P. 813 - 827

Published: July 26, 2024

Abstract The paradox of the great speciators describes a contradictory biogeographic pattern exhibited by numerous avian lineages in Oceania. Specifically, these display broad geographic distributions across region, implying strong over-water dispersal capabilities; yet, they also repeated genetic and phenotypic divergence—even between geographically proximate islands—implying poor inter-island capabilities. One group originally cited as evidence for this is dwarf kingfishers genus Ceyx. Here, using genomic sequencing comprehensive sampling monophyletic Ceyx radiation from northern Melanesia, we find repeated, deep divergence no gene flow found on islands, providing an exceptionally clear example speciators. A dated phylogenetic reconstruction suggests significant burst diversification occurred rapidly after reaching 3.9 2.9 MYA. This supports shift net rate, concordant with expectations “colonization cycle” hypothesis, which implies historical dispersiveness among speciator during evolutionary past. present formalized framework that explains how founder effects shifting selection pressures highly dispersive genotypes are only ultimate causes needed to generate Within framework, emphasize lineage-specific traits island-specific abiotic factors will result varying levels pressure against dispersiveness, caused eco-evolutionary mechanisms. Overall, highlight understanding patterns helped us cohesive provides rigorous mechanistic explanation emergence radiations island archipelagoes globe.

Language: Английский

Digest: Repeated body size evolution in island bats DOI Creative Commons
Graham A. McCulloch

Evolution, Journal Year: 2024, Volume and Issue: 78(7), P. 1349 - 1350

Published: May 8, 2024

Island ecosystems represent outstanding natural laboratories for studying the interplay between ecology and evolution. Lavery et al., (2024) use genomic approaches to identify a remarkable example of repeated evolution in Hipposideros bats across Solomon Islands archipelago. They show that larger-bodied have independently evolved on different islands, highlighting an exciting new system exploring ecological evolutionary drivers mammals.

Language: Английский

Citations

1
Genomic patterns in the dwarf kingfishers of northern Melanesia reveal a mechanistic framework explaining the paradox of the great speciators DOI Creative Commons
Devon A. DeRaad,

Alexandra N Files,

Lucas H. DeCicco

et al.

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(6), P. 813 - 827

Published: July 26, 2024

Abstract The paradox of the great speciators describes a contradictory biogeographic pattern exhibited by numerous avian lineages in Oceania. Specifically, these display broad geographic distributions across region, implying strong over-water dispersal capabilities; yet, they also repeated genetic and phenotypic divergence—even between geographically proximate islands—implying poor inter-island capabilities. One group originally cited as evidence for this is dwarf kingfishers genus Ceyx. Here, using genomic sequencing comprehensive sampling monophyletic Ceyx radiation from northern Melanesia, we find repeated, deep divergence no gene flow found on islands, providing an exceptionally clear example speciators. A dated phylogenetic reconstruction suggests significant burst diversification occurred rapidly after reaching 3.9 2.9 MYA. This supports shift net rate, concordant with expectations “colonization cycle” hypothesis, which implies historical dispersiveness among speciator during evolutionary past. present formalized framework that explains how founder effects shifting selection pressures highly dispersive genotypes are only ultimate causes needed to generate Within framework, emphasize lineage-specific traits island-specific abiotic factors will result varying levels pressure against dispersiveness, caused eco-evolutionary mechanisms. Overall, highlight understanding patterns helped us cohesive provides rigorous mechanistic explanation emergence radiations island archipelagoes globe.

Language: Английский

Citations

1