Genomic and geographic diversification of a “great-speciator” (Rhipidura rufifrons)

Ornithology, Journal Year: 2022, Volume and Issue: 140(1)

Published: Sept. 13, 2022

Abstract The radiation of so-called “great speciators” represents a paradox among the myriad avian radiations endemic to southwest Pacific. In such radiations, lineages otherwise capable dispersing across vast distances open ocean differentiate rapidly and frequently relatively short geographic barriers. Here, we evaluate phylogeography Rufous Fantail (Rhipidura rufifrons). Although presumed “great-speciator”, no formal investigations its range have been performed. Moreover, delimitation within R. rufifrons, biogeographic implications those relationships, remain unresolved. To investigate whether rufifrons great speciator identified thousands single nucleotide polymorphisms for 89 individuals, representing 19 described taxa. Analyses recovered 7 divergent evidence gene flow between geographically isolated populations. We also found plumage differences be poor proxy evolutionary relationships. Given recent divergence dates clade (1.35–2.31 mya), rapid phenotypic differentiation, multiple independent species complex, determine that possesses characteristics speciator.

Language: Английский

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On the brink of explosion? Identifying the source and potential spread of introduced Zosterops white-eyes in North America

Biological Invasions, Journal Year: 2024, Volume and Issue: 26(5), P. 1615 - 1639

Published: March 2, 2024

Language: Английский

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Parallel evolution in an island archipelago revealed by genomic sequencing of Hipposideros leaf-nosed bats

Evolution, Journal Year: 2024, Volume and Issue: 78(6), P. 1183 - 1192

Published: March 7, 2024

Body size is a key morphological attribute, often used to delimit species boundaries among closely related taxa. But body can evolve in parallel, reaching similar final states despite independent evolutionary and geographic origins, leading faulty assumptions of history. Here, we document parallel evolution the widely distributed leaf-nosed bat genus Hipposideros, which has misled both taxonomic inference. We sequenced reduced representation genomic loci measured external characters from three Solomon Islands archipelago, delimited by size. Species tree reconstruction confirms paraphyly two morphologically designated species. The nonsister relationship between large-bodied H. dinops lineages found on different islands indicates that ecomorphs have evolved independently at least twice history this radiation. A lack evidence for gene flow sympatric, taxa suggests rapid strong reproductive isolating barriers distinct populations. Our results position Hipposideros as novel vertebrate system studying repeatability under natural conditions. conclude offering testable hypotheses how geography ecology could be mediating repeated Islands.

Language: Английский

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Island life accelerates geographic radiation in the white‐eyes (Zosteropidae)

Ibis, Journal Year: 2022, Volume and Issue: 165(3), P. 817 - 828

Published: Dec. 22, 2022

White‐eyes are an iconic avian radiation of small passerines that mainly distributed across the eastern hemisphere tropics and subtropics. Species diversity white‐eyes is particularly high on oceanic islands, many species restricted to single islands or island groups. The rate diversification ranks them among fastest radiations known in birds, but whether their accelerated was result repeatedly colonizing remains unexplored. We used a newly estimated timetree for nearly all zosteropids phylogenetic comparative methods estimate compare rates between continental lineages. show have similar extinction rates, yet higher speciation compared with white‐eyes. In addition, we find transitions from continents. Our results importance such as Wallacean Melanesian archipelagos Indo‐Pacific, facilitating within this remarkable clade.

Language: Английский

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Museomics help resolving the phylogeny of snowfinches (Aves, Passeridae, Montifringilla and allies)

Molecular Phylogenetics and Evolution, Journal Year: 2024, Volume and Issue: 198, P. 108135 - 108135

Published: June 24, 2024

Historical specimens from museum collections provide a valuable source of material also remote areas or regions conflict that are not easily accessible to scientists today. With this study, we providing taxon-complete phylogeny snowfinches using historical DNA whole skins an endemic species Afghanistan, the Afghan snowfinch, Pyrgilauda theresae. To resolve strong between previous phylogenetic hypotheses, generated novel mitogenome sequences for selected taxa and genome-wide SNP data ddRAD sequencing all extant snowfinch Qinghai-Tibet Plateau (QTP) extended intraspecific sampling sole Central Western Palearctic (Montifringilla nivalis). Our reconstructions unanimously refuted previously suggested paraphyly genus Pyrgilauda. Misplacement one species-level taxon (Onychostruthus tazcanowskii) in phylogenies was undoubtedly inferred chimeric mitogenomes included heterospecific sequence information. Furthermore, comparison showed presumed sister-group relationship M. nivalis QTP henrici based on flawed taxonomy. were largely congruent supported reciprocal monophyly genera Montifringilla with monotypic Onychostruthus being sister latter. The P. theresae likely originated rather ancient Pliocene out-of-Tibet dispersal probably common ancestor ruficollis. trans-Palearctic white-winged nivalis, confirmed lineage divergence Asian European clade dated 1.5 – 2.7 million years ago (mya). Genome-wide subtle among samples Alps Cantabrian mountains.

Language: Английский

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Genomic patterns in the dwarf kingfishers of northern Melanesia reveal a mechanistic framework explaining the paradox of the great speciators

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

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A test of island biogeographic theory applied to estimates of gene flow in a Fijian bird is largely consistent with neutral expectations

Molecular Ecology, Journal Year: 2020, Volume and Issue: 29(21), P. 4059 - 4073

Published: Sept. 25, 2020

Islands were key to the development of allopatric speciation theory because they are a natural laboratory repeated barriers gene flow caused by open water gaps. Despite their proclivity for promoting divergence, little empirical work has quantified extent among island populations. Following classic biogeographic theory, two metrics interest relative size and distance. Fiji presents an ideal system studying these dynamics, with four main islands that form large-small pairs. We sequenced thousands ultraconserved elements (UCEs) bush-warbler Horornis ruficapilla, passerine distributed on Fijian islands, performed demographic analysis test hypotheses effects distance rates flow. Our inferred low levels from each large its small counterpart or none in opposite direction. The difference between pairs manifested itself lower more distant islands. Both findings generally concordant biogeography. amount reduction based was consistent predictions equations, while possibly greater than expected. These offer hypothesis framework guide future study interisland archipelagos as biogeography progresses into genomic era.

Language: Английский

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A phylogeny of white-eyes based on ultraconserved elements

Molecular Phylogenetics and Evolution, Journal Year: 2021, Volume and Issue: 164, P. 107273 - 107273

Published: July 29, 2021

Language: Английский

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Genomic novelty within a “great speciator” revealed by a high-quality reference genome of the collared kingfisher (Todiramphus chloris collaris)

G3 Genes Genomes Genetics, Journal Year: 2022, Volume and Issue: 12(11)

Published: Sept. 26, 2022

Abstract Islands are natural laboratories for studying patterns and processes of evolution. Research on island endemic birds has revealed elevated speciation rates rapid phenotypic evolution in several groups (e.g. white-eyes, Darwin’s finches). However, understanding the evolutionary behind these requires an how genotypes map to novel phenotypes. To date, there few high-quality reference genomes species found islands. Here, we sequence genome one Ernst Mayr’s “great speciators,” collared kingfisher (Todiramphus chloris collaris). Utilizing high molecular weight DNA linked-read sequencing technology, assembled a draft with highly contiguous scaffolds (scaffold N50 = 19 Mb). Based universal single-copy orthologs, estimated gene space completeness 96.6% assembly. The population demographic history analyses reveal distinct pattern contraction expansion size throughout Pleistocene. Comparative genomic analysis family that species-specific rapidly expanding families (relative other Coraciiformes) mainly involved ErbB signaling pathway focal adhesion. Todiramphus kingfishers species-rich group become focus research. This will be platform future taxonomic, phylogeographic, research group. For example, target genes enable testing changes sensory structures associated vision taste across kingfishers.

Language: Английский

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Taxonomic implications of recent molecular analyses of Spectacled (Symposiachrus trivirgatus) and Spot-winged (S. guttula) Monarchs (Passeriformes: Monarchidae)

Emu - Austral Ornithology, Journal Year: 2021, Volume and Issue: 121(4), P. 365 - 371

Published: Oct. 2, 2021

Genomic approaches to phylogeography routinely reveal that our estimates of species level diversity within island systems are woefully underappreciated. A recent analysis population genetics, and historical demography two pied monarchs (Monarchidae), the Spectacled (Symposiachrus trivirgatus) Spot-winged Monarchs (S. guttula), uncovered unexpected instances paraphyly genetic diversity. Here, we discuss taxonomic implications for these complexes recommend recognising three what has been considered S. trivirgatus. We defer naming a genetically distinct admixed guttula on Gag Island, Indonesia, and, pending further study, advocate continued recognition this as monotypic. This study highlights cryptic in Indo-Pacific complex need thoroughly sampled phylogenomic datasets reconcile taxonomy with evolutionary history birds region.

Language: Английский

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