The role of land bridges, ancient environments, and migrations in the assembly of the North American flora

Journal of Systematics and Evolution, Год журнала: 2018, Номер 56(5), С. 405 - 429

Опубликована: Янв. 18, 2018

Abstract Continental‐scale assembly of floras results from past and present in situ diversification association with several external processes. Among these processes are the making breaking connections among landmasses. Connections landmasses constantly flux as climates landscapes along connection corridors, so that or land bridges, may either facilitate restrict migration at a given time. Across changing landscape‐level organismal factors include dispersal potential vectors propagules, competition, predation, distributions altered by pathogens. Assembly flora is, therefore, outcome complex, interacting, temporally‐varying render simplistic explanations unlikely. In case North America, continent experienced ephemeral adjacent regions via five bridges over last 100 Ma different times under specific landscape morphologies, including edaphic characteristics. Here, I emphasize earliest connections, Beringia, which probably comprised an initially‐incomplete bridge during Cretaceous Paleocene resulting compression, fragmentation, rotation Asian‐North American sub‐blocks America began moving westward northern portion Mid‐Atlantic Ridge. During same time, additional was added to Beringia accretion terranes subduction edge Pacific Plate beneath American‐Asian Plates Eocene form Aleutian Islands. Other between were Atlantic, Antilles, Central Magellan bridge.

Язык: Английский

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Tracking temporal shifts in area, biomes, and pollinators in the radiation of Salvia (sages) across continents: leveraging anchored hybrid enrichment and targeted sequence data

American Journal of Botany, Год журнала: 2019, Номер 106(4), С. 573 - 597

Опубликована: Апрель 1, 2019

Premise of the Study A key question in evolutionary biology is why some clades are more successful by being widespread geographically, biome diverse, or species‐rich. To extend understanding how shifts area, biomes, and pollinators impact diversification plants, we examined relationships these to across mega‐genus Salvia . Methods chronogram was developed from a supermatrix anchored hybrid enrichment genomic data targeted sequence for over 500 nearly 1000 species. Ancestral areas biomes were reconstructed using BioGeo BEARS Pollinator guilds scored, ancestral determined, pollinator identified, rates switches compared. Key Results well‐resolved phylogenetic backbone updated subgeneric designations presented. originated Southwest Asia Oligocene subsequently dispersed worldwide. Biome frequent likely lineage utilizing broadleaf and/or coniferous forests arid shrublands. None four species correlated biomes. Shifts pollination system not shifts, except one hummingbird shift that precedes major near crown New World subgen. Calosphace Multiple reversals back bee occurred within this clade. Conclusions diversified extensively different continents, with both bird pollinators. The lack tight correlation biome, most documented points other important drivers speciation

Язык: Английский

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Out of the Himalaya-Hengduan Mountains: Phylogenomics, biogeography and diversification of Polygonatum Mill. (Asparagaceae) in the Northern Hemisphere

Molecular Phylogenetics and Evolution, Год журнала: 2022, Номер 169, С. 107431 - 107431

Опубликована: Фев. 5, 2022

Язык: Английский

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Phylogenomics shed light on the complex evolutionary history of a gymnosperm genus showing East Asian–Tethyan disjunction

Journal of Systematics and Evolution, Год журнала: 2025, Номер unknown

Опубликована: Янв. 3, 2025

Abstract When and how disjunct distributions of biological taxa arose has long attracted interest in biogeography, yet the East Asian–Tethyan disjunction is understudied. Cupressus (Cupressaceae) shows this disjunction, with 10 species Asia three Mediterranean region. Here we used target‐capture sequencing obtained 1991 single‐copy nuclear genes, plus complete plastomes, to infer evolutionary history . Our phylogenomic reconstruction resolved four well supported clades , but revealed significant phylogenetic conflicts, inter‐lineage gene flow, incomplete lineage sorting tree estimation error all making important contributions. The Chengiana clade most likely originated by hybridization between ancestors Himalayan–Hengduan Mountains subtropical clades, whereas orogenic climatic changes may have facilitated flow within clade. Molecular dating suggested that recent common ancestor appeared around middle Eocene period then became continuously distributed across Eurasia. when diverged, been driven Eocene/Oligocene declines global temperature, reinforced ecogeographic barrier created uplift Qinghai–Tibet Plateau. Niche shifts clade, signatures selection genes for drought salt tolerance, probably indicate adaptation local conditions. Overall, our study in‐depth analyses are powerful tools deciphering complex origin organisms, especially gymnosperms.

Язык: Английский

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Phylogenomics and intergenomic conflict in a challenging orchid clade (Calypsoinae): monophyly of Corallorhiza, paraphyly of Oreorchis, and resurrection of Kitigorchis

Botanical Journal of the Linnean Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Abstract Heterotrophic plants are among the most recalcitrant from a systematics perspective because of reduced morphological and genomic features, often extreme substitution rate heterogeneity. The orchid subtribe Calypsoinae exemplifies this, containing several lineages that have lost leaves photosynthesis. In particular, relationships leafy Asian Oreorchis leafless American Corallorhiza been contentious. Here we used nuclear sequence capture to resolve within addressed monophyly Oreorchis, for which previous studies highlighted conflicting patterns or paraphyly, depending on data analysed. Nuclear analyses provided strong support monophyletic paraphyletic latter with two strongly supported clades. As in studies, plastid recovered assemblages both genera. Topology tests using rejected constrained topologies, further revealing cytonuclear conflict. Network-based revealed lack evidence hybridization, suggesting incomplete lineage sorting associated biological historical factors driven intergenomic Additionally, found loci identified as putatively holomycotrophic species functionally enriched organellar functions. study provides case resurrection Kitigorchis sister Corallorhiza, species, erythrochrysea indica, highlights challenges phylogenetics mycoheterotrophs.

Язык: Английский

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Phylogeny and biogeography of the pantropical genus Zanthoxylum and its closest relatives in the proto-Rutaceae group (Rutaceae)

Molecular Phylogenetics and Evolution, Год журнала: 2018, Номер 126, С. 31 - 44

Опубликована: Апрель 10, 2018

Язык: Английский

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The Beringian Coevolution Project: holistic collections of mammals and associated parasites reveal novel perspectives on evolutionary and environmental change in the North

Arctic Science, Год журнала: 2016, Номер 3(3), С. 585 - 617

Опубликована: Дек. 23, 2016

The Beringian Coevolution Project (BCP), a field program underway in the high northern latitudes since 1999, has focused on building key scientific infrastructure for integrated specimen-based studies mammals and their associated parasites. BCP contributed new insights across temporal spatial scales into how ancient climate environmental change have shaped faunas, emphasizing processes of assembly, persistence, diversification vast region. collections also represent baseline records biotic diversity from at time accelerated change. These specimens data form an unmatched resource identifying hidden diversity, interpreting past responses to oscillations, documenting contemporary conditions, anticipating outcomes complex biological systems regime ecological perturbation. Because its dual focus hosts parasites, record provides foundation comparative analyses that can document effects dynamic geographic distribution, transmission dynamics, emergence pathogens. By using specific examples carnivores, eulipotyphlans, lagomorphs, rodents, ungulates, we demonstrate broad, provide permanent informs policy decisions regarding human impact effect natural populations.

Язык: Английский

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Chloroplast phylogenomics of the New World grape species (Vitis, Vitaceae)

Journal of Systematics and Evolution, Год журнала: 2018, Номер 56(4), С. 297 - 308

Опубликована: Июнь 25, 2018

Abstract Vitis L. (the grape genus) is the economically most important fruit crop, as source of grapes and wine. Phylogenetic relationships within genus have been highly controversial. Herein, we employ sequence data from whole plastomes to attempt enhance phylogenetic resolution. The results support New World subgenus monophyletic. Within clade, V. californica sister remaining . Furthermore, , a Eurasian clade robustly supported clade. vinifera ssp. sylvestris core Asian Several widespread species in North America are found be non‐monophyletic plastome tree, for example, broadly defined cinerea aestivalis each needs split into several species. non‐monophyly some may also due common occurrences hybridizations American classification by Munson nine series discussed based on results. Analyses divergence times lineage diversification rapid radiation beginning Neogene.

Язык: Английский

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Target Capture Sequencing Unravels Rubus Evolution

Frontiers in Plant Science, Год журнала: 2019, Номер 10

Опубликована: Дек. 20, 2019

Rubus (Rosaceae) comprises more than 500 species with additional commercially cultivated raspberries and blackberries. The most recent (> 100 years old) global taxonomic treatment of the genus defined 12 subgenera; two subgenera were subsequently described some rearranged. Intra- interspecific ploidy levels hybridization make phylogenetic estimation challenging. Our objectives to estimate phylogeny 94 taxonomically geographically diverse three cultivars using chloroplast DNA sequences target capture approximately 1,000 low copy nuclear genes; divergence times between major clades; examine historical biogeography diversification. Target sequencing identified eight groups within Rubus. Subgenus Orobatus Subg. Anoplobatus monophyletic, while other recognized para- or polyphyletic. Multiple events likely occurred across at subgeneric levels, e.g., (blackberries) × Idaeobatus (raspberries) Cylactis (Arctic berries) hybrids. raspberry heritage known blackberry hybrids was confirmed. common ancestor distributed in North America. distribution during Miocene (about 20 Ma) from America into Asia Europe Bering land bridge southward crossing Panamanian Isthmus. diversified greatly Miocene. taxonomy does not reflect relationships revision is warranted. migrated towards Asia, Europe, Central South early then diversified. Ancestors may have Oceania by long distance bird dispersal. This presents a roadmap for further systematics research. In conclusion, dataset provides high resolution though it also gave evidence gene tree/species tree cytonuclear discordance. Discordance be due incomplete lineage sorting, rather lack signal. study illustrates importance multiple methods when examining complex utility software programs that signal conflict datasets.

Язык: Английский

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Phylogenomics, biogeography, and adaptive radiation of grapes

Molecular Phylogenetics and Evolution, Год журнала: 2018, Номер 129, С. 258 - 267

Опубликована: Сен. 6, 2018

Язык: Английский

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