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| 1 | Predicting the impact of climate change on the distribution of two threatened Himalayan medicinal plants of Liliaceae in Nepal显示文摘Predicting the potential distribution of medicinal plants in response to climate change is essential for their conservation and management. Contributing to the management program, this study aimed to predict the distribution of two threatened medicinal plants, Fritillaria cirrhosa and Lilium nepalense. The location of focal species gathered from herbarium specimen housed in different herbaria and online databases were geo-referenced and checked for spatial autocorrelation. The predictive environmental variables were selected, and MaxE nt software was used to model the current and future distributions of focal species. Four Representative Concentration Pathway(RCP) trajectories of the BCC-CSM1.1 model were used as the future(2050) projection layer. The MaxEnt modelling delineated the potential distribution of F. cirrhosa and L. nepalense. The current suitability is projected towards Central and Eastern Hilly/Mountainous regions. Both species gainmaximum suitability in RCP 4.5 which decline towards other trajectories for L. nepalense. Overall, both the focal species shift towards the north-west, losing their potential habitat in hilly and lower mountainous regions by 2050 across all trajectories. Our results highlight the impact of future climate change on two threatened and valuable species. The results can be further useful to initiate farming of these medicinally and economically important species based on climatically suitable zone and for designing a germplasm conservation strategy. | RANA Santosh Kumar RANA Hum Kala GHIMIRE Suresh Kulllar SHRESTHA Krishna Kumar RANJITKAR Sailesh | 2017 | Journal of Mountain Science2017，14，3： | 5 |
| 2 | Geoclimatic factors influence the population genetic connectivity of Incarvillea arguta(Bignoniaceae)in the Himalaya-Hengduan Mountains biodiversity hotspot显示文摘Geoclimatic factors related to the uplift of the Himalaya and the Quaternary climatic oscillations in fluence the population genetic connectivity in the Himalaya-Hengduan Mountains(HHM)biodiversity hotspot.Therefore,to explore the relative roles played by these two factors,we examined the population dynamics and dispersal corridors of Incarvillea arguta(Royle)Royle incorporating ensemble species distribution modelling(SDM).Thirty-seven populations were genotyped using plastid chloroplast DNA and low copy nuclear gene(ncpCS)sequences.Phylogeographic analysis was carried out to reveal the genetic structure and lineage differentiation.Ensemble SDMs were carried out for distributional change in the last glacial maximum,present,and future.Finally,the least cost path method was used to trace out possible dispersal corridors.The haplotypes were divided into four clades with strong geographical structure.The late Miocene origin of I.arguta in the western Himalaya ca.7.92 Ma indicates lineage diversification related to the uplift of the HHM.The variability in habitat connectivity revealed by SDM is due to change in suitability since the Pleistocene.A putative dispersal corridor was detected along the drainage systems and river valleys,with strong support in the eastern Hengduan Mountains group.Our results support the signature of geoclimatic influence on population genetic connectivity of I.arguta in the HHM.We proposed that the major drainage systems might have assisted the rapid dispersal of isolated riverine plant species I.arguta in the HHM.The population genetic connectivity,using the fine-tuned ensemble SDMs,enables scientists and policymakers to develop conservation strategies for the species gene pool in the HHM biodiversity hotspots. | Santosh Kumar Rana Dong Luo Hum Kala Rana Alexander Robert O'Neill Hang Sun | 2021 | Journal of Systematics and Evolution2021，59，1： | 3 |
| 3 | Molecular phylogeny,biogeography and character evolution of the montane genus Incarvillea Juss.(Bignoniaceae)显示文摘The complex orogeny of the Himalaya and the Qinghai-Tibet Plateau(QTP)fosters habitat fragmentation that drives morphological differentiation of mountain plant species.Consequently,determining phylogenetic relationships between plant subgenera using morphological characters is unreliable.Therefore,we used both molecular phylogeny and historical biogeographic analysis to infer the ancestral states of several vegetative and reproductive characters of the montane genus Incarvillea.We determined the taxonomic position of the genus Incarvillea within its family and inferred the biogeographical origin of taxa through Bayesian inference(BI),maximum likelihood(ML)and maximum parsimony(MP)analyses using three molecular data sets(trnL-trnF sequences,nr ITS sequences,and a data set of combined sequences)derived from 81%of the total species of the genus Incarvillea.Within the genus-level phylogenetic framework,we examined the character evolution of 10 key morphological characters,and inferred the ancestral area and biogeographical history of the genus.Our analyses revealed that the genus Incarvillea is monophyletic and originated in Central Asia during mid-Oligocene ca.29.42 Ma.The earliest diverging lineages were subsequently split into theWestern Himalaya and Sino-Himalaya during the early Miocene ca.21.12 Ma.These lineages resulted in five re-circumscribed subgenera(Amphicome,Olgaea,Niedzwedzkia,Incarvillea,and Pteroscleris).Moreover,character mapping revealed the ancestral character states of the genus Incarvillea(e.g.,suffruticose habit,cylindrical capsule shape,subligneous capsule texture,absence of capsule wing,and loculicidal capsule dehiscence)that are retained at the earliest diverging ancestral nodes across the genus.Our phylogenetic tree of the genus Incarvillea differs from previously proposed phylogenies,thereby recommending the placement of the subgenus Niedzwedzkia close to the subgenus Incarvillea and maintaining two main divergent lineages. | Santosh Kumar Rana Dong Luo Hum Kala Rana Shaotian Chen Hang Sun | 2021 | Plant Diversity2021，43，1： | 1 |
| 4 | Determining bioclimatic space of Himalayan alder for agroforestry systems in Nepal显示文摘Himalayan alder species are proven to be very useful in traditional as well as contemporary agroforestry practice. These nitrogen-fixing trees are also useful in the land restoration. Therefore, understanding the distribution of Himalayan alder and the potential zone for plantation is meaningful in the agroforestry sector. Suitable climatic zones of Alnus spp. were modelled in Max Ent software using a subset of least correlated bioclimatic variables for current conditions(1950 -2000), topographic variables(DEM derived) and Landuse Landcover(LULC) data. We generated several models and selected the best model against random models using ANOVA and t-test. The environmental variables that best explained the current distribution of the species were identified and used to project into the future. For future projections, ensemble scenarios of climate change projection derived from the results of 19 Earth System Models(ESM) were used. Our model revealed that the most favorable conditions for Alnus nepalensis are in central Nepal in the moist north-west facing slope, whereas for Alnus nitida they are in western Nepal.The major climatic factor that contributes to Alnus species distribution in Nepal appears to be precipitation during the warmest quarter for A. nepalensis and precipitation during the driest quarter for A. nitida. Future projections revealed changes in the probability distribution of these species, as well as where they need conservation and where they can be planted. Also, our model predicts that the distribution of Alnus spp. in hilly regions will remain unchanged, and therefore may represent sites that can be used to revitalize traditional agroforestry systems and extract source material for land restoration. | Santosh Kumar Rana Hum Kala Rana Krishna Kumar Shrestha Suresh Sujakhu Sailesh Ranjitkar | 2018 | Plant Diversity2018，40，1： | 1 |
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