Phylogenomics, biogeography, and evolution of morphology and ecological niche of the eastern Asian–eastern North AmericanNyssa(Nyssaceae)

Journal of Systematics and Evolution, Год журнала: 2020, Номер 58(5), С. 571 - 603

Опубликована: Май 9, 2020

Abstract Nyssa (Nyssaceae, Cornales) represents a classical example of the well‐known eastern Asian–eastern North American floristic disjunction. The genus consists three species in Asia, four America, and one Central America. Species are ecologically important trees Asian forests. distribution living rich fossil record make it an excellent model for understanding origin evolution However, despite small number species, relationships within have remained unclear not been elucidated using molecular approach. Here, we integrate data from 48 nuclear genes, fossils, morphology, ecological niche to resolve relationships, elucidate its biogeographical history, investigate morphology niches, aiming at better EA–ENA Results showed that (CAM) talamancana was sister remaining which were divided among three, rapidly diversified subclades. Estimated divergence times history suggested had ancestral range Eurasia western America late Paleocene. rapid diversification occurred early Eocene, followed by multiple dispersals between Erasian continents. experienced two major episodes extinction Oligocene end Neogene, respectively. N. relic lineage boreotropical flora Paleocene/Eocene boundary once results supported importance both Atlantic land bridge Bering (BLB) Paleogene Neogene dispersals, respectively, as well role refugia flora. total‐evidence‐based dated phylogeny pattern macroevolution coincided with paleoclimatic changes. We found evolutionary changes (including wood anatomy leaf traits) niches (precipitation temperature) disjunct, supporting selection driving trait evolutions after geographic isolation. also demonstrated challenges phylogenomic studies lineages histories. concatenation gene can lead inference strongly incongruent tree. conflicts genealogies did seem impose strong effect on time dating our case. Furthermore, events may be recovered analysis BEAST if critical constraints relevant nodes available. Our study provides complex bidirectional exchanges plants Paleogene, but “out Asia” migrations explain present disjunct EA ENA.

Язык: Английский

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At the passing gate: past introgression in the process of species formation betweenAmazilia violicepsandA. viridifronshummingbirds along the Mexican Transition Zone

Journal of Biogeography, Год журнала: 2015, Номер 42(7), С. 1305 - 1318

Опубликована: Март 17, 2015

Abstract Aim We tested whether populations of violet‐crowned and green‐fronted hummingbirds, Amazilia violiceps viridifrons , are genetically environmentally differentiated, examined the role past geological climatic changes in driving their diversification. Location Trans‐Mexican Volcanic Belt. Methods Mitochondrial nuclear DNA individuals collected throughout species' ranges were sequenced then analysed using maximum‐likelihood Bayesian approaches. Species tree analysis, species delimitation, divergence time inference, historical demography, palaeodistribution modelling, niche tests used to reconstruct evolutionary history species, isolation‐with‐migration coalescent model was assessed determine genetic between occurred presence gene flow. Results Genetic A. shallow, with incomplete lineage sorting introgression. delimitation supported three independent lineages: located north Belt; a mixture south volcanic belt populations; villadai east Isthmus Tehuantepec. Gene flow estimates, demographic patterns support diversification by isolation migration habitat shifting response Pleistocene fluctuations. Main conclusions The process speciation complex may be explained combined effects resulting from Belt lowlands at Tehuantepec Quaternary changes.

Язык: Английский

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Influence of Pleistocene Glacial/Interglacial Cycles on the Genetic Structure of the Mistletoe Cactus Rhipsalis baccifera (Cactaceae) in Mesoamerica

Journal of Heredity, Год журнала: 2015, Номер 106(2), С. 196 - 210

Опубликована: Фев. 2, 2015

Phylogeographical work on cloud forest-adapted species provides inconsistent evidence forest dynamics during glacial cycles. A study of Rhipsalis baccifera (Cactaceae), a bird-dispersed epiphytic mistletoe cactus, was conducted to investigate genetic variation at sequence data from nuclear [internal transcribed spacer (ITS), 677 bp] and chloroplast (rpl32-trnL, 1092bp) DNA for 154 individuals across the range in Mesoamerica determine if such patterns are consistent with expansion/contraction model We population spatial analyses as well gene flow divergence time estimates between 24 populations comprising distribution R. Mexico Guatemala gain insight evolutionary history these populations, complementary modeling approach frame information derived into an explicit paleoecological context. The results revealed phylogeographical break Isthmus Tehuantepec, high levels diversity among areas. Despite differentiation some widespread ITS ribotypes suggest effective via pollen shown by rpl32-trnL suggests more restricted seed flow. Predictions models under past last maximum (LGM) climatic conditions significant signal demographic expansion that experienced tracking shifted lowlands connectivity LGM.

Язык: Английский

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Effects of Environmental Changes on the Occurrence of Oreomunnea mexicana (Juglandaceae) in a Biodiversity Hotspot Cloud Forest

Forests, Год журнала: 2017, Номер 8(8), С. 261 - 261

Опубликована: Июль 26, 2017

The tropical montane cloud forests are recognized as one of the most biodiverse ecosystems. In spite this, they among threatened ecosystems in world. This study integrates three ecological approaches generally studied separately: climate change scenery, niche and population dynamics Oreomunnea mexicana (an endangered relict species), to understand how environmental affects structure forest that will allow its conservation. Potential distribution under future climatic scenarios species at national regional levels was generated from Maxent algorithm. Also, current abundance, were analyzed level. Changes potential two models suggest a habitat reduction 36% 55% nationally, 2% 9% level, for 2050 2070, respectively. is fragmented consists subpopulations have spatial structures aggregated populations size reversed “J” form. highly specialized sensitive changes. O. flagship biological cultural importance region’s inhabitants could be fundamental conservation forests.

Язык: Английский

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Molecular and iridescent feather reflectance data reveal recent genetic diversification and phenotypic differentiation in a cloud forest hummingbird

Ecology and Evolution, Год журнала: 2016, Номер 6(4), С. 1104 - 1127

Опубликована: Янв. 22, 2016

Abstract The present day distribution and spatial genetic diversity of Mesoamerican biota reflects a long history responses to habitat change. hummingbird Lampornis amethystinus is distributed in northern Mesoamerica, with geographically disjunct populations. Based on sampling across the species range using mitochondrial DNA (mt ) sequences nuclear microsatellites jointly analysed phenotypic climatic data, we (1) test whether fragmented correlated main evolutionary lineages, (2) assess body size plumage color differentiation populations geographic isolation, (3) evaluate set divergence scenarios demographic patterns Analysis variation revealed four groups: blue‐throated (Sierra Madre del Sur); two groups amethyst‐throated (Trans‐Mexican Volcanic Belt Sierra Oriental); east Isthmus Tehuantepec ( IT males showing an amethyst throat. most basal split estimated have originated Pleistocene, 2.39–0.57 million years ago MYA ), corresponded separated by . However, recent time between blue‐ does not correspond 2‐ MY needed be isolation for substantial divergence, likely because structurally iridescent colors are more malleable than others. Results modeling Approximate Bayesian Computation analysis fit model lineage west after Last Glacial Maximum LGM that species’ suitable was during past current conditions. These results challenge generality contraction/expansion glacial cloud forest‐interior urges management forest, highly vulnerable ecosystem climate change currently facing destruction, prevent further loss or extinction.

Язык: Английский

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Phylogeography and population differentiation in the Psittacanthus calyculatus (Loranthaceae) mistletoe: a complex scenario of climate–volcanism interaction along the Trans‐Mexican Volcanic Belt

Journal of Biogeography, Год журнала: 2017, Номер 44(11), С. 2501 - 2514

Опубликована: Июль 31, 2017

Abstract Aim The formation of the Trans‐Mexican Volcanic Belt ( TMVB ) played an important role in driving inter‐ and intraspecific diversification at high elevations. However, Pleistocene climate changes ecological factors might also contribute to plant genetic structuring along volcanic belt. Here, we analysed phylogeographical patterns parrot‐mistletoe Psittacanthus calyculatus determine relative contribution these different factors. Location Belt. Methods Using nuclear chloroplast DNA sequence data for 370 individuals, investigate differentiation 35 populations across species range. We conducted phylogenetic, population spatial analyses P. sequences with niche modelling Bayesian inference methods gain insight into variation populations. Results Our revealed structure three groups corresponding individuals from Oaxaca those central‐eastern western regions. A significant signal demographic expansion, east‐to‐west expansion predicted by distribution modelling, approximate computation strongly supported a scenario habitat isolation invasion during late‐Pleistocene. Main conclusions may be explained combined effects (1) geographical linked glacial/interglacial cycles environmental factors, congeners more xeric vegetation (2) east west, suggesting both colonization models.

Язык: Английский

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Phylogeographic analyses and genetic structure illustrate the complex evolutionary history of Phragmites australis in Mexico

American Journal of Botany, Год журнала: 2016, Номер 103(5), С. 876 - 887

Опубликована: Май 1, 2016

PREMISE OF THE STUDY: Genetic data suggest that three lineages of Phragmites australis are found in North America: the Native American lineage, Gulf Coast and Invasive lineage. In Mexico, P. is a common species, but nothing known about distribution or ecology these lineages. We examined phylogeography to analyze current geographic genetic variation, demographic history, dispersal patterns better understand its evolutionary history Mexico. METHODS: sampled 427 individuals from 28 populations. used two noncoding regions chloroplast DNA estimate levels variation identified groups across species' geographical range compared genealogical relationships among haplotypes with those previously reported. A hypothesis expansion was also tested for Mexican KEY RESULTS: 13 new native Mexico might be undergoing an active process diversification. Genealogical analyses provided evidence independent present The invasive lineage not detected our sampling. Our estimates population expansions ranged 0.202 0.726 mya. CONCLUSIONS: species has been thousands years. climatic changes during Pleistocene played important role populations constitute different

Язык: Английский

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A phylogenomic investigation into the biogeography of the Mexico–eastern U.S. disjunction in Symphyotrichum

American Journal of Botany, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Premise Biotic disjunctions have attracted scientific attention for the past 200 years. Despite being represented in many familiar plants (such as bald cypress, flowering dogwood, sweetgum, partridgeberry, etc.), eastern North American (ENA)–Mexican (M) disjunction remains poorly understood. Major outstanding questions include divergence times of taxa exhibiting and environmental/geological processes that may underlie disjunction. Symphyotrichum Nees (Asteraceae), one most diverse genera USA, displays several examples disjunct ENA–M taxa. Methods We generated target capture data using Angiosperms353 baitset first well‐sampled phylogenomic hypothesis its close relatives. Focusing on S . subgenus Virgulus , we used MCMC TREE to perform time estimation R package BioGeoBEARS infer ancestral regions biogeographic transitions between America Mexico. Finally, niche reconstruction method Utremi test a role historical aridification generating Results Our molecular suggest recent radiation at Plio‐Pleistocene boundary (~2.5 mya), with early connections Mexico lineages closed off shortly after were followed by vicariance across this region. Except some present‐day broadly distributed species, there is complete lack movement ENA M ~0.5 mya. Conclusions A reconstructed distribution suitable habitat Pleistocene climatic models corroborates results from modeling confirms glacial cycles are more likely be associated breakup connections.

Язык: Английский

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Interglacial genetic diversification of Moussonia deppeana (Gesneriaceae), a hummingbird‐pollinated, cloud forest shrub in northern Mesoamerica

Molecular Ecology, Год журнала: 2014, Номер 23(16), С. 4119 - 4136

Опубликована: Июнь 21, 2014

Abstract Recent empirical work on cloud forest‐adapted species supports the role of both old divergences across major geographical areas and more recent attributed to Pleistocene climate changes. The shrub Moussonia deppeana is distributed in northern Mesoamerica, with geographically disjunct populations. Based sampling throughout range employing plastid nuclear markers, we (i) test whether fragmented distribution correlated main evolutionary lineages, (ii) reconstruct its phylogeographical history infer forest Mesoamerica (iii) evaluate a set refugia/vicariance scenarios for region demographic patterns populations whose ranges expanded tracked conditions during Last Glacial Maximum. We found deep split M. about 6–3 Ma, which could be consistent Pliocene divergence. Comparison variation markers revealed several lineages mostly congruent their isolated restricted gene flow among groups. Results modelling coalescent simulations fit model multiple refugia diverging interglacial cycles. not an expanding–contracting archipelago Instead, our data suggest that persisted glacial cycles, experienced isolation divergence periods.

Язык: Английский

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Large scale patterns of genetic variation and differentiation in sugar maple from tropical Central America to temperate North America

BMC Evolutionary Biology, Год журнала: 2015, Номер 15(1)

Опубликована: Ноя. 19, 2015

Abstract Background Geological events in the latter Cenozoic have influenced distribution, abundance and genetic structure of tree populations temperate tropical North America. The biogeographical history vegetation that spans large ranges latitude is complex, involving multiple latitudinal shifts might occurred via different migration routes. We determined regional structuring variation sugar maple ( Acer saccharum subsp. ) its only subspecies America skutchii using nuclear chloroplast data. studied span a geographic range from Maine, USA (46°N), to El Progreso, Guatemala (15°N). examined subdivisions, explored locations ancestral haplotypes, analyzed data explore presence single or glacial refugia, tested whether lineages are temporally consistent with Pleistocene older divergence. Results Nuclear indicated midwestern western Mexico were highly differentiated rest sites. time most recent common ancestor haplotype lineage was dated Pliocene (5.9 Ma, 95 % HPD: 4.3–7.3 Ma). Splits during separated phylogroups. frequent widespread half sites (Guatemala, eastern Mexico, southeastern USA, Ohio). Our also suggested refugia (tropics-southeastern midwestern, northeastern USA), but not (Jalisco), contributed post-glacial northward expansion ranges. Current southern Mexican Guatemalan reduced population sizes, bottlenecks tend toward homozygosity, as markers. Conclusions divergence maples likely resulted orographic volcanic barriers gene flow. Past connectivity among possible through flow Pleistocene. values revealed Midwest Northeast represented lineages, indicating major haplotypes before Last Glacial Maximum suggesting existence refugia.

Язык: Английский

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