Multiple Ecological Niche Modeling Reveals Niche Conservatism and Divergence in East Asian Yew (Taxus)

Plants, Год журнала: 2025, Номер 14(7), С. 1094 - 1094

Опубликована: Апрель 1, 2025

Understanding ecological niche evolution patterns is crucial for elucidating biogeographic history and guiding biodiversity conservation. Taxus a Tertiary relict gymnosperm with 11 lineages mainly distributed across East Asia, spanning from tropical to subarctic regions. However, the spatiotemporal dynamics of its roles geographical factors in lineage diversification, remain unclear. Using occurrence records, environmental data, reconstructed phylogenies, we employed ensemble models (eENMs), principle components analysis (PCA-env), phyloclimatic modeling analyze similarity among lineages. Based on Bayesian trees distribution characteristics, classified eleven into four clades: Northern (T. cuspidata), Central chinensis, T. qinlingensis, Emei type), Western wallichiana, florinii, contorta), Southern calcicola, phytonii, mairei, Huangshan type). Orogenic activities climate changes Tibetan Plateau since Late Miocene likely facilitated local adaptation ancestral populations China, Hengduan Mountains, Yunnan-Guizhou Plateau, driving their expansion diversification towards west south. Key variables, including extreme temperature, temperature precipitation variability, light, altitude, were identified as major drivers current divergence. Both conservatism divergence observed, early followed by recent The clade exhibits high heat moisture tolerance, suggesting an adaptive shift, while clades retain drought cold displaying significant phylogenetic (PNC). We recommend prioritizing conservation which highest PNC level, particularly Qinling, Daba, Taihang are highly degraded vulnerable future fluctuations.

Язык: Английский

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Phylogenetic incongruence in an Asiatic species complex of the genus Caryodaphnopsis (Lauraceae)

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Июнь 28, 2024

Abstract Background Caryodaphnopsis , a group of tropical trees ( ca . 20 spp.) in the family Lauraceae, has an amphi-Pacific disjunct distribution: ten species are distributed Southeast Asia, while eight restricted to rainforests South America. Previously, phylogenetic analyses using two nuclear markers resolved relationships among five from Latin However, between Asia remain poorly known. Results Here, we first determined complete mitochondrial genome (mitogenome), plastome, and ribosomal cistron (nrDNA) sequences C. henryi with lengths 1,168,029 bp, 154,938 6495 respectively. We found 2233 repeats 368 potential SSRs mitogenome 50 homologous DNA fragments its plastome. Gene synteny analysis revealed mass rearrangements mitogenomes Magnolia biondii Hernandia nymphaeifolia only six conserved clustered genes them. In order reconstruct for created three datasets: one (coding intergenic regions), another plastome (whole genome), other cistron. All 22 individuals were divided into four, five, different clades phylogenies based on mitogenome, nrDNA datasets, Conclusions The study showed conflicts within organellar data species. sympatric Hekou Malipo SW China may be related incomplete lineage sorting, chloroplast capture, and/or hybridization, which mixed as complex their evolutionary history.

Язык: Английский

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Pleistocene glaciation advances the cryptic speciation of Stellera chamaejasme L. in a major biodiversity hotspot

Journal of Integrative Plant Biology, Год журнала: 2024, Номер 66(6), С. 1192 - 1205

Опубликована: Апрель 19, 2024

ABSTRACT The mountains of Southwest China comprise a significant large mountain range and biodiversity hotspot imperiled by global climate change. high species diversity in this system has long been attributed to complex set factors, recent large‐scale macroevolutionary investigations have placed broad timeline on plant diversification that stretches from 10 million years ago (Mya) the present. Despite our increasing understanding temporal mode speciation, finer‐scale population‐level are lacking better refine these trends illuminate abiotic biotic influences cryptic speciation. This is largely due dearth organismal sampling among closely related populations, spanning incredible size topological heterogeneity region. Our study dives into evolutionary dynamics speciation using genomic eco‐morphological data Stellera chamaejasme L. We identified four previously unrecognized having indistinct morphological traits metapopulation evolving lineages, suggesting more (~2.67–0.90 Mya), influenced Pleistocene glaciation factors. These factors likely allopatric advocated cyclical warming–cooling episodes along elevational gradients during Pleistocene. refines be much younger than implicated raises concern projected future warming may influence alpine diversity, necessitating increased conservation efforts.

Язык: Английский

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Dense infraspecific sampling reveals cryptic differentiation in the enigmatic hemiparasitic love vine Cassytha filiformis (Lauraceae)

Journal of Systematics and Evolution, Год журнала: 2024, Номер unknown

Опубликована: Март 31, 2024

Abstract Species delimitation remains a challenge worldwide, especially in highly diverse tropical and subtropical regions. Here, we use an integrative approach that combines morphology, phylogenomics, species distribution modeling (SDM) to clarify the cryptic differentiation within enigmatic hemiparasitic love vine Cassytha filiformis (Lauraceae) China adjacent We generated complete plastid genomes nuclear ribosomal sequences for samples from across range compared results with previously published data, recovering two well‐supported monophyletic clades. Further, analysis revealed significant differences morphological characters SDM, indicating distinct environmental factors influencing their distributions. Fossil‐calibrated analyses estimate origins diversification patterns gave divergence age estimates corresponding Oligo‐Miocene; period of new ecological opportunities associated prevailing East Asian monsoon. Multivariate support conclusion southern regions have different, unknown, lineage C. . Our study highlights importance using multivariate characterize plant species, as well role past climatic changes played driving speciation parasitic plants zones.

Язык: Английский

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Plant species diversification in the Himalaya–Hengduan Mountains region: an example from an endemic lineage of Pedicularis (Orobanchaceae) in the role of floral specializations and rapid range expansions

Cladistics, Год журнала: 2024, Номер unknown

Опубликована: Сен. 11, 2024

Abstract The c. 270 endemic species of Pedicularis in the Himalaya–Hengduan Mountains (HHM) region exhibit high diversity geographic distribution, elevational range and floral morphology. Many these, including with longest corolla tubes beaked galeas, are monophyletic represent a putative situ radiation. In this study, we focus on representative Clade 3 within HHM region. We integrate plastid phylogeny clade environmental data distributions to infer correlates diversity. estimate macroevolutionary rates reconstructed ancestral states for ranges traits, analyse patterns overlap niche evolution assess drivers diversification Our results show that from northwest Yunnan southwest Sichuan is centre . Rates associated precipitation multiple factors. Multiple expansions Sanjiang (Three Parallel Rivers) region, followed by allopatric speciation across contributed early rapid diversification. Corolla traits not significantly This study highlights importance integrated evidence understanding dynamics contributes our origins remarkable richness plant

Язык: Английский

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Phylogenomic insights into species relationships, reticulate evolution, and biogeographic diversification of the ginseng genus Panax (Araliaceae), with an emphasis on the diversification in the Himalayan‐Hengduan Mountains

Journal of Systematics and Evolution, Год журнала: 2024, Номер 63(1), С. 99 - 114

Опубликована: Ноя. 11, 2024

Abstract Panax (Araliaceae) is a small genus containing several well known medicinally important species. It has disjunct distribution between Eastern Asia and North America, with most species from eastern Asia, especially the Himalayan‐Hengduan Mountains (HHM). This study used genomic target enrichment method to obtain 358 nuclear ortholog loci complete plastome sequences 59 accessions representing all 18 of genus. Divergence time estimation biogeographic analyses suggest that was probably widely distributed America during middle Eocene. During late Eocene Oligocene may have experienced extensive extinctions global climate cooling. survived diverged early in mountains Southwest China tropical Indochina, where some taxa migrated northwestward HHM, eastward central China, then onward toward Japan America. Gene flow identified as main contributor phylogenetic discordance (33.46%) within . We hypothesize common ancestors P. ginseng + japonicus quinquefolius clade had allopolyploidization, which increased adaptability cooler drier environments. Miocene, dispersals occurred region HHM contiguous areas, suggesting acted refugium also served secondary diversification center for Our findings highlight interplay orographic uplift climatic changes greatly contributed diversity

Язык: Английский

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Responses of Three Pedicularis Species to Geological and Climatic Changes in the Qinling Mountains and Adjacent Areas in East Asia

Plants, Год журнала: 2024, Номер 13(6), С. 765 - 765

Опубликована: Март 8, 2024

The Qinling Mountains in East Asia serve as the geographical boundary between north and south of China are also indicative climatic differences, resulting rich ecological species diversity. However, few studies have focused on responses plants to geological changes adjacent regions. Therefore, we investigated evolutionary origins phylogenetic relationships three Pedicularis there provide molecular evidence for origin evolution plant species. Ecological niche modeling was used predict geographic distributions during last interglacial period, glacial maximum current future periods, respectively. Furthermore, distribution patterns climate fluctuations dynamics framework were assess equivalence or difference niches among results revealed that divergence took place Miocene Holocene which significantly associated with large-scale uplifts In addition, undergone a northward migration from past future. most important environmental variables affecting mean diurnal range annual temperature range. analysis suggested similar niches. Among them, P. giraldiana showed highest breadth, covering nearly all spaces dissecta bicolor. summary, this study provides novel insights into their findings provided new perspectives conservation management

Язык: Английский

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Cryptic divergence in and evolutionary dynamics of endangered hybrid Picea brachytyla sensu stricto in the Qinghai-Tibet Plateau

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Дек. 19, 2024

The visual similarities observed across various plant groups often conceal underlying genetic distinctions. This occurrence, known as cryptic diversity, underscores the key importance of identifying and understanding intraspecific evolutionary lineages in ecology conservation biology. In this study, we conducted transcriptome analysis 81 individuals from 18 natural populations a northern lineage Picea brachytyla sensu stricto that is endemic to Qinghai-Tibet Plateau. Our revealed presence two distinct local lineages, emerging approximately 444.8 thousand years ago (kya), within endangered species. divergence event aligns well with geographic climatic oscillations occurred distributional range during Mid-Pleistocene epoch. Additionally, identified numerous environmentally correlated gene variants, many other genes showing signals positive selection genome. These factors likely contributed persistence adaptation lineages. findings shed light on highly dynamic processes remarkably similar phenotypes Importantly, these results enhance our past for species histories, also provide guidance development plans.

Язык: Английский

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Floral and genetic divergence across environmental gradients is moderated by inter-population gene flow in Platanthera dilatata (Orchidaceae)

Frontiers in Ecology and Evolution, Год журнала: 2023, Номер 11

Опубликована: Март 24, 2023

Understanding how natural selection acts on intraspecific variation to bring about phenotypic divergence is critical understanding processes of evolutionary diversification. The orchid family well known for pollinator-mediated floral phenotypes operating among species and along environmental or geographic gradients. Its effectiveness at small spatial scales less understood, making the scale which examined important evaluating causes divergence. In this study, we quantified in Platanthera dilatata across 26 populations coastal Southeast Alaska compared edaphic genetic microsatellite loci. We sought determine (1) if flower morphological structured smaller scales, (2) extent relation divergence, (3) inter-population gene flow occurs, (4) relative importance distance abiotic factors population structure. Two groups were found separate based lip spur length are restricted different habitats. Small-flowered forms occur muskeg bogs, whereas large-flowered fens meadows, rarely sub-alpine habitat. Genetic analyses concordant with clusters, except four small-flowered that genetically indistinguishable from considered be introgressed. fact, most exhibited some admixture, indicating incomplete reproductive isolation between forms. Pollinators may partition but also facilitate because short-tongued Noctuidae moths pollinate both phenotypes, longer-tongued hawkmoths only observed pollinating phenotype, strengthen Nevertheless, pollinator movement habitats could have lasting effects neutral variation. At scale, structure associated distance, likely due extensive seed movement. While study corroborates previous findings cryptic lineages P. , examination provided greater underlie

Язык: Английский

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Plastome phylogenomics and morphological traits analyses provide new insights into the phylogenetic position, species delimitation and speciation of Triplostegia (Caprifoliaceae)

BMC Plant Biology, Год журнала: 2023, Номер 23(1)

Опубликована: Дек. 15, 2023

Abstract Background The genus Triplostegia contains two recognized species, T. glandulifera and grandiflora , but its phylogenetic position species delimitation remain controversial. In this study, we assembled plastid genomes nuclear ribosomal DNA (nrDNA) cistrons sampled from 22 wild individuals, each a separate population, examined these with 11 recently published plastomes. Morphological traits were measured herbarium specimens material, ecological niche models constructed. Results is monophyletic within the subfamily Dipsacoideae comprising three an unrecognized sp. A, which occupies much higher altitude than other two. new had previously been misidentified as differs in taproot, leaf, characters . Triplotegia old genus, stem age 39.96 Ma, it diverged 7.94 Ma. A 1.05 perhaps response to Quaternary climate fluctuations. Niche overlap between was positively correlated their relatedness. Conclusions Our results provide insights into of indicate that taxonomic revision needed. We also identified either rpoB-trnC or ycf1 could serve barcode for

Язык: Английский

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