Ups and downs: Genetic differentiation among populations of the Podocarpus (Podocarpaceae) species in Mesoamerica

Molecular Phylogenetics and Evolution, Journal Year: 2019, Volume and Issue: 138, P. 17 - 30

Published: May 23, 2019

Language: Английский

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Quantitative characterization of iridescent colours in biological studies: a novel method using optical theory

Interface Focus, Journal Year: 2018, Volume and Issue: 9(1), P. 20180049 - 20180049

Published: Dec. 14, 2018

Iridescent colours are that change with viewing or illumination geometry. While they widespread in many living organisms, most evolutionary studies on iridescence do not take into account their full complexity. Few try to precisely characterize what makes iridescent special: angular dependency. Yet, it is likely this dependency has biological functions and therefore submitted pressures. For reason, biologists need a repeatable method measure as well variables quantify the In study, we use theoretical approach propose five allow one fully describe at every angle combination. Based results, new measurement protocol statistical reliably while minimizing required number of time-consuming measurements. We hummingbird feathers butterfly wings test cases demonstrate strengths method. show our precise enough be potentially used intraspecific level being also time-efficient encompass large taxonomic scales.

Language: Английский

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The geography of evolutionary divergence in the highly endemic avifauna from the Sierra Madre del Sur, Mexico

BMC Evolutionary Biology, Journal Year: 2019, Volume and Issue: 19(1)

Published: Dec. 1, 2019

Abstract Background Mesoamerica is a remarkable region with high geological and ecological complexity. Within northern Mesoamerica, the biotic province of Sierra Madre del Sur (SMS) in southwestern Mexico harbors exceptionally avian endemism diversity. Herein, we searched for spatially temporally concordant phylogeographic patterns, four bird genera from three distinct orders co-distributed across investigated their causes through hypothesis testing regarding historical processes. Selected species include endemic differentiated populations montane forests particularly within SMS. Results We gathered mitochondrial DNA sequences at least one locus 177 individuals all species. assessed genetic structure, demographic history, defined framework coalescent simulations used biogeographic temporal spatial co-variance. Our analyses suggested shared breaks areas corresponding to SMS populations, between main systems Central Valley Oaxaca Nicaragua Depression being most frequently among analyzed taxa. Nevertheless, dating divergence patterns observed were consistent broad vicariance derived mechanisms operating times taxa Conclusions study provides understanding evolutionary origins factors enhancing speciation well-defined regions indicating that history extant biota inhabiting complex often idiosyncratic.

Language: Английский

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Genetic structuring and secondary contact in the white‐chested Amazilia hummingbird species complex

Journal of Avian Biology, Journal Year: 2018, Volume and Issue: 49(4)

Published: Feb. 12, 2018

Pleistocene climate cycles have been recognized to be a major driver of postglacial northward range expansion North American bird populations. During glacial maxima, allopatric lineages that were reproductively isolated might come into secondary contact with one another during periods and the genetic signatures past hybridization as result events should produce detectable hybrid zones. The white‐chested hummingbirds Amazilia violiceps A. viridifrons , constitute species complex showing phenotypic similarity across its range. One exception is subspecies found in Central Depression Chiapas ( villadai ), which shares some plumage traits endemic but green‐fronted populations Oaxaca. Phylogenetic relationships, taxonomy limits among controversial for decades. We assessed structure introgression this by analysing 95 individuals at ten nuclear microsatellites morphology. Bayesian analysis yielded four clusters. However, only two clusters generally match previously described mtDNA haplogroups, parental taxon south ) cluster admixed taxa cannot attributed any pure population. High admixture was recorded / range, probably consequence northern . Signs gene flow between low. Historical contemporary migration rates Approximate computations support scenario divergence flow: basal split separating other clades are derived from second or merger due flow.

Language: Английский

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Estimation of colour volumes as concave hypervolumes using α‐shapes

Methods in Ecology and Evolution, Journal Year: 2020, Volume and Issue: 11(8), P. 955 - 963

Published: April 26, 2020

Abstract Organisms often display multiple colour patches and for many analyses, it may be useful to take into account all these at the same time, reconstruct volume of organisms. Stoddard Prum (2008, The American Naturalist , 171 755) proposed use convex hulls a species. Convex hull has since then been used as an index colourfulness, intersection is study similarity between two objects. In this article, I outline limitations in context. particular, studies have reported that overestimates actual volume. argued more general tool, developed flexible extension hulls: α ‐shapes. Depending on parameter ‐shapes can concave (i.e. non‐convex) volumes with voids or pockets are better suited estimation volumes. To determine optimal value point out expected properties multidimensional trait spaces, which translate conditions providing lower upper bound propose technical tools identify satisfying conditions. Using data from whole bird community biological station Nouragues, French Guiana, show using rather than results possibly major differences discuss possible future developments new framework both science other areas ecology dealing such where ‐shape could serve replacement functional richness FRic, morphometrics.

Language: Английский

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Phylogeography of the widespread white-eared hummingbird (Hylocharis leucotis): pre-glacial expansion and genetic differentiation of populations separated by the Isthmus of Tehuantepec

Biological Journal of the Linnean Society, Journal Year: 2020, Volume and Issue: 130(2), P. 247 - 267

Published: March 10, 2020

Abstract The Pleistocene glacial cycles had a strong influence on the demography and genetic structure of many species, particularly northern-latitude taxa. Here we studied phylogeography white-eared hummingbird (Hylocharis leucotis), widely distributed species highlands Mexico Central America. Analysis mitochondrial DNA (mtDNA) sequences was combined with ecological niche modelling (ENM) to infer demographic population differentiation scenarios under present past conditions. Analyses 108 samples from 11 geographic locations revealed among populations separated by Isthmus Tehuantepec (IT) Motagua-Polochic-Jocotán (MPJ) fault barriers. ENM predicted widespread distribution suitable habitat for H. leucotis since Last Inter Glacial (LIG), but this noticeably contracted fragmented at IT. Models historical dispersal corridors based genetics data existence west IT; however, connectivity across IT has changed little LIG. shallow either side isthmus star-like haplotype network, long-term persistence time potential routes, support scenario divergence migration subsequent isolation in Chiapas south MPJ fault. Our findings corroborate profound effects climatic fluctuations evolutionary history montane taxa challenge generality expanded (pine-oak forests) during cycles.

Language: Английский

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Mito-nuclear discordance in the phenotypically variable Andean hummingbirdsCoeligena bonaparteiandCoeligena helianthea(Trochilidae)

Biological Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 139(2), P. 145 - 157

Published: April 15, 2023

Abstract The interplay among evolutionary mechanisms like gene flow and selection may result in discordant signals between mitochondrial DNA, nuclear markers phenotypes. Andean hummingbirds Coeligena bonapartei helianthea showed differentiation the ND2 which is with plumage coloration but consistent geography. We analysed complete genomes of individuals from bonapartei, consita, helianthea, tamai to inform their history. found genetic structure despite low these populations. Phylogenetic network analyses based on mitogenomes a northern vs. southern pattern relationships phenotypes (serving as basis for taxonomy). Mitogenomes two nominate subspecies are indistinguishable, suggesting incomplete lineage sorting or introgression, while those C. b. consita h. more similar each other than they respective subspecies. Our results indicate that various drove divergence phenotypes, hummingbirds, playing out over complex biogeographic scenario likely involving periods isolation secondary contact. outline hypotheses be tested future genome-wide variation.

Language: Английский

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Whole-genome selection signature differences between Chaohu and Ji’an red ducks

BMC Genomics, Journal Year: 2024, Volume and Issue: 25(1)

Published: May 27, 2024

Abstract Assessing the genetic structure of local varieties and understanding their data are crucial for effective management preservation. However, differences among breeds require further explanation. To enhance our population diversity, we conducted a genome-wide comparative study Chaohu Ji’an Red ducks using genome sequence restriction site-associated DNA sequencing technology. Our analysis revealed distinct distinction between two breeds, leading to divided groups. The phylogenetic tree duck displayed branches, potentially indicating minimal impact from artificial selection. Additionally, ROH (runs homozygosity) that had lower average inbreeding coefficient than ducks. We identified several genomic regions with high similarity in these indigenous breeds. By conducting selective sweep analysis, 574 candidate genes associated muscle growth ( BMP2 , ITGA8 MYLK PTCH1 ), fat deposits ELOVL1 HACD2 pigmentation ASIP LOC101797494 ). These results offer valuable insights enhancement conservation Chinese

Language: Английский

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Climatic niche shifts and ecological sky‐island dynamics in Mesoamerican montane birds

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(9)

Published: Sept. 1, 2024

An ongoing challenge in evolutionary and ecological research focuses on testing biogeographic hypotheses for the understanding of both species' distributional patterns factors influencing range limits. In this study, we described climatic niches Neotropical humid montane forest birds through analysis driving their evolution at inter- intraspecific levels; tested differences among allopatric lineages within

Language: Английский

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Molecular and climate data reveal expansion and genetic differentiation of Mexican Violet-ear Colibri thalassinus thalassinus (Aves: Trochilidae) populations separated by the Isthmus of Tehuantepec

Journal of Ornithology, Journal Year: 2018, Volume and Issue: 159(3), P. 687 - 702

Published: Feb. 27, 2018

Language: Английский

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