What Predicts Gene Flow During Speciation? The Relative Roles of Time, Space, Morphology and Climate DOI Creative Commons
Jeffrey W. Streicher, Shea M. Lambert,

Fausto R. Méndez de la Cruz

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(23)

Published: Nov. 7, 2024

The processes that restrict gene flow between populations are fundamental to speciation. Here, we develop a simple framework for studying whether divergence in morphology, climatic niche, time and space contribute reduced among species. We apply this model system involving clade of spiny lizards (Sceloporus) occurring mostly northeastern Mexico, which show striking variation morphology habitat closely related species populations. developed new time-calibrated phylogeny the group using RADseq data from 152 individuals. This identified 12 putative species-level clades, including at least two undescribed then estimated levels 21 geographically adjacent pairs also morphological niche variables these same pairs, along with times geographic distances. Using Bayesian generalised linear models, found lineages is negatively them (which uncorrelated), not distance or divergence. used here can be applied study speciation many other organisms having genomic but lacking direct on reproductive isolation. several intriguing patterns system, parallel evolution strikingly similar montane blue-red morph more dull-coloured desert ancestors within different, nonsister

Language: Английский

Speciation Rates of Freshwater Fish Across the Americas Vary With Environmental Heterogeneity and Dispersal Ability DOI
David Griffiths

Journal of Biogeography, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT Aims Species richnesses show marked spatial trends, but the contribution of speciation rates (SpecRates) to these trends is less clear. The roles environmental heterogeneity (topography and climate), glaciation, dispersal ability, times colonise, speciate large‐scale variation in SpecRates freshwater fish faunas are assessed. Location Atlantic Pacific coast drainages North, Central, South America. Taxon Fish. Methods Published information was compiled on SpecRates, phylogenies, colonisation times, species geographic distributions, migratory behaviour fishes 582 catchments. effects topographic climatic factors, including glaciation vagility, three rate metrics were examined using boosted regression tree models. Results Mean differ five‐fold across drainage regions with glaciation. highest Nearctic decline southwards, drainages, between Neotropical basins. Assemblage vary percentage species, heterogeneity, time, age. High associated postglacial recolonisation by rapidly speciating diadromous Neotropics for resident potamodromous higher than species. dispersing into an area more migratory, occur further north, have wider distributions diversifying situ. Endemicity recently colonised increases time levels. Main Conclusions Spatial temporal topography climate generate differences connectivity which, coupled abilities overcome barriers, result different areas.

Language: Английский

Citations

0
Repeated Mitochondrial Capture With Limited Genomic Introgression in a Lizard Group DOI Creative Commons

Wesley J. Read,

Rebecca J. Laver, Ching C. Lau

et al.

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

ABSTRACT Mitochondrial introgression is common among animals and often first identified through mitonuclear discordance—discrepancies between evolutionary relationships inferred from mitochondrial DNA (mtDNA) nuclear (nuDNA). Over recent decades, genomic data have also revealed extensive in many animal groups, with implications for genetic phenotypic diversity. However, the extent to which mtDNA corresponds nuDNA varies. Here, we investigated historical Gehyra nana ‐occidentalis clade, a complex group of Australian geckos documented cases discordance suggestive repeated introgression. We hypothesised that this clade reflects substantial Despite evidence introgression, however, found little no using exon capture genome‐wide single nucleotide polymorphism (SNP) data. gene flow at modern contact zones detected only early generation hybrid. Unsurprisingly, given these results, transgressive, intermediate, or more variable morphological phenotypes taxa introgressed mtDNA. These findings suggest hybridisation system has, least some cases, resulted This pattern aligns other studies showing limited discordance, highlighting potentially broader trend radiations.

Language: Английский

Citations

0
Comparative phylogeography of lizards (Squamata: Phrynosomatidae) in Baja California and expansion of Callisaurus draconoides within the North American deserts DOI Creative Commons
Andrew D. Gottscho, Bradford D. Hollingsworth, Julio A. Lemos‐Espinal

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

ABSTRACT We examined the comparative phylogeography of five co-distributed lizard complexes (representing four genera within Phrynosomatidae) along Baja California Peninsula (BCP) in context region’s complex geological history. Double-digest restriction-associated-DNA (ddRAD) sequencing was used to collect genome-wide sequence data for 228 peninsular lizards. Using phylogenetic analyses concatenated loci and population admixture analysis unlinked SNPs, we identified 24 potential lineages complexes. Four exhibited contact zones between at Isthmus La Paz, all did Vizcaíno Desert. To generate a species tree model, subsampled two lizards from each these use with target capture (TSC) protocol. The resulting time-calibrated shows that genus, Paz divergences are older than those across A full-likelihood Bayesian phylogeographic approach also test simultaneous divergence hypothesis Desert, providing strong support least three independent events zone, thereby rejecting hypothesis. Finally, demonstrate through expanded geographic sampling (n=142) ddRAD zebra-tailed ( Callisaurus ), which most divergent endemic southern BCP, exhibit clear pattern Pleistocene range expansion northern BCP into deserts western United States mainland Mexico. deeply nested individuals our occur northern, eastern, southeastern limits temperate, subtropical, tropical biomes, respectively. These results collectively highlight importance BCP’s tectonic isolation as driver not only local or endemism, but potentially contributing factor lineage diversification more broadly region.

Language: Английский

Citations

0
Distinguishing species boundaries from geographic variation DOI Creative Commons
E. Anne Chambers,

José Daniel Lara-Tufiño,

Gustavo Campillo-García

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(19)

Published: May 5, 2025

In an era of unprecedented biodiversity loss, the need for standardized practices to describe biological variation is becoming increasingly important. As with all scientific endeavors, species delimitation needs be explicit, testable, and refutable. A fundamental task in distinguishing within-species from among-species variation. Many that are distributed across large geographic areas exhibit levels genetic as great or greater than those exist between well-defined sympatric species. Here, we provide a workflow distinguish intra- interspecific apply taxonomically problematic group frogs (the Rana pipiens complex, leopard frogs) widely Mexico Central America. Our makes use recent advancements pair genome-scale datasets model-based methods, while emphasizing positive evidence reproductive isolation confirm validity geographically contiguous boundaries. We find intraspecific widespread frog has resulted considerable taxonomic inflation Ten currently recognized not supported our analyses, here synonymize them previously named taxa. Furthermore, presence three undescribed addition proposing these changes, descriptions data analyses would needed refute overturn recommendations. recommend studies (especially variable groups) clarify what new sufficient change

Language: Английский

Citations

0
Recent Developments in Species Delimitation and Taxonomy Considered in the Context of the Unified Species Concept DOI
Kevin de Queiroz

Herpetologica, Journal Year: 2025, Volume and Issue: 81(2)

Published: April 25, 2025

Language: Английский

Citations

0
Understanding Species Boundaries that Arise from Complex Histories: Gene Flow Across the Speciation Continuum in the Spotted Whiptail Lizards DOI
Anthony J. Barley, Adrián Nieto‐Montes de, Norma L. Manríquez‐Morán

et al.

Systematic Biology, Journal Year: 2024, Volume and Issue: unknown

Published: July 17, 2024

Gene flow between diverging lineages challenges the resolution of species boundaries and understanding evolutionary history in recent radiations. Here, we integrate phylogenetic coalescent tools to resolve reticulate patterns diversification use a perspective focused on mechanisms distinguish interspecific intraspecific taxonomic variation. We this approach systematics for one most intensively studied but difficult understand groups reptiles: spotted whiptail lizards genus Aspidoscelis (A. gularis complex). Whiptails contain largest number unisexual known within any vertebrate group complex has played key role generation diversity through hybrid speciation. Understanding lineage divergence reticulation is therefore whiptails. Despite importance, long-standing confusion about their impeded which gonochoristic have contributed formation lineages. Using reduced representation genomic data, gene whiptails clarify find evidence that biogeographically structured ecological environmental variation been important morphological genetic diversification, as well maintenance system. Our study elucidates how among continuous nature speciation can bias practice delimitation lead taxonomists operating under different frameworks conclusions (here propose two arrangement best reflects our current understanding). In doing so, provides conceptual methodological insights into approaches resolving rapid radiations with histories, field systematic biology.

Language: Английский

Citations

3
What Predicts Gene Flow During Speciation? The Relative Roles of Time, Space, Morphology and Climate DOI Creative Commons
Jeffrey W. Streicher, Shea M. Lambert,

Fausto R. Méndez de la Cruz

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(23)

Published: Nov. 7, 2024

The processes that restrict gene flow between populations are fundamental to speciation. Here, we develop a simple framework for studying whether divergence in morphology, climatic niche, time and space contribute reduced among species. We apply this model system involving clade of spiny lizards (Sceloporus) occurring mostly northeastern Mexico, which show striking variation morphology habitat closely related species populations. developed new time-calibrated phylogeny the group using RADseq data from 152 individuals. This identified 12 putative species-level clades, including at least two undescribed then estimated levels 21 geographically adjacent pairs also morphological niche variables these same pairs, along with times geographic distances. Using Bayesian generalised linear models, found lineages is negatively them (which uncorrelated), not distance or divergence. used here can be applied study speciation many other organisms having genomic but lacking direct on reproductive isolation. several intriguing patterns system, parallel evolution strikingly similar montane blue-red morph more dull-coloured desert ancestors within different, nonsister

Language: Английский

Citations

2