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Plant Diversity 2023年第4期45卷 363-368页

作者： Hong Qian Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA

Invasive species may pose significant threats to biodiversity and ecosystem structure and *** number of introduced species that have become invasive is substantial and is rapidly *** potentially invasive species and preventing their expansion are of critical importance in invasion *** relatedness between invasive and native species has been used in predicting invasion *** studies on the phylogenetic relatedness of plants at the transition from naturalization to invasion have shown mixed results,which may be because different methods were used in different ***,I use the same method to analyze two comprehensive data sets from South Africa and China,using two phylogenetic metrics reflecting deep and shallow evolutionary histories,to address the question whether the probability of becoming invasive is higher for naturalized species distantly related to the native *** study suggests that the probability of becoming invasive is higher for naturalized species closely related to the native *** finding of my study is consistent with Darwin's preadaptation hypothesis.

关键词： Angiosperms Exotic species Introduced species Invasive species Naturalized species phylogenetic relatedness

Geographic patterns of taxonomic and phylogenetic β-diversity of angiosperm genera in regional floras across the world

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Plant Diversity 2023年第5期45卷 491-500页

作者： Hong Qian Shenhua Qian Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China

Beta diversity(β-diversity)is the scalar between local(α)and regional(γ)*** geographic patterns ofβ-diversity is central to ecology,biogeography,and conservation biology.A full understanding of the origin and maintenance of geographic patterns ofβ-diversity requires exploring both taxonomic and phylogeneticβ-diversity,as well as their respective turnover and nestedness components,and exploring phylogenetic p-diversity at different evolutionary *** this study,we explore and map geographic patterns ofβ-diversity for angiosperm genera in regional floras across the *** examine both taxonomic and phylogeneticβ-diversity and their constituent components,and both tip-weighted and basal-weighted phylogeneticβ-diversity,and relate them to *** the one hand,our study found that the global distribution ofβ-diversity is highly *** is the case for both taxonomic and phylogeneticβ-diversity,and for both tip-weighted and basal-weighted phylogeneticβ-*** the other hand,our study found that there are highly consistent geographic patterns among different metrics ofβ-*** most cases,metrics ofβ-diversity are negatively associated with latitude,particularly in the Northern *** metrics of taxonomicβ-diversity are strongly and positively correlated with their counterparts of phylogeneticβ-diversity.

关键词： Angiosperm Beta diversity Flowering plant Latitudinal gradient phylogenetic relatedness

Are phylogenies resolved at the genus level appropriate for studies on phylogenetic structure of species assemblages?

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Plant Diversity 2021年第4期43卷 255-263页

作者： Hong Qian Yi Jin Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL62703USA Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China Guizhou Normal UniversityGuiyang550025China

Phylogenies are essential to studies investigating the effect of evolutionary history on assembly of species in ecological communities and geographical and ecological patterns of phylogenetic structure of species *** phylogenies well resolved at the species level are lacking for many major groups of organisms such as vascular plants,researchers often generate a species-level phylogenies using a phylogeny well resolved at the genus level as a backbone and attaching species to their respective genera in the phylogeny as polytomies or by using a megaphylogeny well resolved at the genus level as a backbone and adding additional species to the megaphylogeny as polytomies of their respective ***,whether the result of a study using species-level phylogenies generated in these ways is robust,compared to that based on phylogenies fully resolved at the species level,has not been ***,we use 1093 angiosperm tree assemblages(each in a 110110 km quadrat)in North America as a model system to address this question,by examining six commonly used metrics of phylogenetic structure(phylogenetic diversity and phylogenetic relatedness)and six climate variables commonly used in *** results showed that(1)the scores of phylogenetic metrics derived from species-level phylogenies resolved at the genus level with species being attached to their respective genera as polytomies are very strongly or perfectly correlated to those derived from a phylogeny fully resolved at the species level(the mean of correlation coefficients is 0.973),and(2)the relationships between the scores of phylogenetic metrics and climate variables are consistent between the two sets of analyses based on the two types of *** study suggests that using species-level phylogenies resolved at the genus level with species being attached to their genera as polytomies is appropriate in studies exploring patterns of phylogenetic structure of species in ecological communities

关键词： Genus-level phylogeny Species-level phylogeny phylogenetic diversity phylogenetic relatedness Community phylogenetics Environmental gradient

An unprotected vulnerable relict subtropical conifer-Keteleeria evelyniana: Its forests, populations, growth and endangerment by invasive alien plant species in China

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Plant Diversity 2024年第5期46卷 648-660页

作者： Cindy Q.Tang Min-Rui Du Huan-Chong Wang You-Cai Shi Jia-Le Zeng Shu-Li Xiao Peng-Bin Han Jian-Ran Wen Shi-Qian Yao Ming-Chun Peng Chong-Yun Wang Yong-Ping Li Jordi López-Pujol Institute of Ecology and Geobotany College of Ecology and Environmental ScienceYunnan UniversityBuilding#3Guozhong DalouDongwaihuan South RoadUniversity TownChenggong New DistrictKunming 650504YunnanChina College of Life Sciences Yunnan UniversityShengming Kexueyuan Building#2Chenggong CampusDongwaihuan South RoadUniversity TownChenggong New DistrictKunming 650504YunnanChina College of Natural Resources Yunnan UniversityChenggong CampusDongwaihuan South RoadUniversity TownChenggong New DistrictKunming 650504YunnanChina Botanic Institute of Barcelona(IBB CSIC-CMCNC)Passeig del Migdia s/nBarcelona 08038CataloniaSpain Escuela de Ciencias Ambientales Universidad Espíritu Santo(UEES)Samborondon 091650Ecuador

Relict subtropical coniferous forests in China face severe fragmentation,resulting in declining populations,and some are under significant threat from invasive alien *** the crucial importance of understanding forest dynamics,knowledge gaps persist,particularly regarding the impact of invasive plants on vulnerable natives like Keteleeria *** this study,we investigated the impact of invasive plants on the regeneration of forests dominated by ***,a subtropical relict species in southwestern *** this purpose,we characterized forest dynamics of 160 forest plots featuring *** as the primary dominant species and determined whether the presence of invasive plants was correlated with regeneration of *** identified four distinct forest types in which *** was *** found that radial growth of *** trees is faster in younger ageclasses today than it was for older trees at the same *** population structure of *** in each forest type exhibited a multimodal age-class ***,three forest types lacked established saplings younger than 10 years old,a situation attributed to the dense coverage of the invasive alien Ageratina *** invasive species resulted in a reduction of understory species ***,our analysis uncovered a significant negative correlation in phylogenetic relatedness(net relatedness index)between native and invasive alien plant species in eastern *** suggests closely related invasive species face heightened competition,hindering successful *** together,our findings indicate that successful establishment and habitat restoration of *** seedling/saplings require effective measures to control invasive plants.

关键词： Keteleeria evelyniana Age structure Regeneration Species diversity Invasive alien species phylogenetic relatedness

Ecological and evolutionary constraints on regional avifauna of passerines in China

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Current Zoology 2021年第4期67卷 431-440页

作者： Tianlong Cai Qing Quan Gang Song Yongjie Wu Zhixin Wen Chunlan Zhang Yanhua Qu Gexia Qiao Fumin Lei Key Laboratory of the Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510260China Key Laboratory of Bio-resources and Eco-environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China Centerfor Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223China

Strong correlations between species diversity and climate have been widely observed,but the mechanism underlying this relationship is ***,we explored the causes of the richness-climate relationships among passerine birds in China by integrating tropical conservatism and diversification rate hypotheses using path *** found that assemblages with higher species richness southwest of the Salween-Mekong-Pearl River Divide are phylogenetically overdispersed and have shorter mean root distances(MRDs),while species-rich regions northeast of this divide(e.g.,north Hengduan Mountains-south Qinling Mountains)are phylogenetically clustered and have longer *** results of the path analyses showed that the direct effect of climatic factors on species richness was stronger than their indirect effects on species richness via phylogenetic relatedness,indicating that neither tropical conservatism nor diversification rate hypotheses can well explain the richness-climate relationship among passerines in ***,when path analyses were conducted within subregions separately,we found that the tropical conservatism hypothesis was well supported in the southwestern Salween-Mekong-Pearl River Divide,while the diversification rate hypothesis could explain the richness-climate relationship well in the northeastern *** conclude that the diversity patterns of passerines in different subregions of the Eastern Himalayas-Mountains of Southwest China may be shaped by different evolutionary processes related to geological and climatic histories,which explains why the tropical conservatism or diversification rate hypothesis alone cannot fully explain the richness-climate relationships.

关键词： avifauna diversification rate hypothesis diversity hotspots.Eastern Himalayas-Mountains of Southwest China phylogenetic relatedness tropical conservatism hypothesis

Species traits and shoot-root biomass allocation in 20 dry-grassland species

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Journal of Plant Ecology 2018年第2期11卷 273-285页

作者： Iveta Husáková Jacob Weiner Zuzana Münzbergová Department of Botany Faculty of ScienceCharles UniversityBenátská2CZ-12801 PragueCzech Republic Institute of Botany Academy of Sciences of the Czech RepublicZámek 1CZ-25243 PrůhoniceCzech Republic Department of Plant and Environmental Sciences University of CopenhagenThorvaldsensvej 40DK-1871 FrederiksbergDenmark

Aims A plant has a limited amount of resources at any time and it allo-cates them to different *** spite of the large number of previous studies on allocation patterns within single species,knowledge of general patterns in species allocation is still very *** is because each study was done in different condi-tions using different methodology,making generalization *** investigate intraspecific above-versus below-ground biomass allocation among individuals across a spectrum of dry-grassland plant species at two different developmental stages and ask whether allocation is age-and species specific,and whether differences among species can be explained by their life-history traits and *** We collected data on above-and below-ground biomass of seedlings and adult plants of 20 species from a common garden *** analysed data on shoot-root biomass allocation allometrically and studied the relationship between the allometric exponents(slopes on log-log scale),species life-history traits and phylogenetic *** Findings We found isometric as well as allometric patterns of biomass alloca-tion in the studied *** and adult individuals of more than half of the species differed in their above-versus below-ground biomass allometric *** and adult individuals of the remaining species differed in their allometric coefficients(inter-cepts).Annual species generally allocated proportionally more to above-than below-ground biomass as seedlings than as adults,whereas perennial species showed the opposite *** life-history traits,such as plant life span,age of first flowering,month in which the species begin flowering and specific leaf area were much more important in explaining differences in shoot-root allometry among species than were phylogenetic *** suggests that allocation patterns vary greatly among closely related species but can be predicted based on species life-hi

关键词： above-ground biomass below-ground biomass allometry isometry seedling adult plant life-history traits phylogenetic relatedness root-shoot ratio