检索结果-南通市图书馆

Potential distributional shifts in North America of allelopathic invasive plant species under climate change models

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2022年第1期44卷 11-19页

作者： Anson Wang Anthony e.Melton douglas esoltis Pamela Ssoltis Department of Biology University of FloridaGainesvilleFL32611USA Florida Museum of Natural History University of FloridaGainesvilleFL32611USA Genetics Institute University of FloridaGainesvilleFL32610USA Biodiversity Institute University of FloridaGainesvilleFL32611USA

Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change *** species are recognized for their ability to modify soil microbial communities and influence ecosystem ***,we focused on six species of allelopathic flowering plants-Ailanthus altissima,Casuarina equisetifolia,Centaurea stoebe ***,Dioscorea bulbifera,Lantana camara,and Schinus terebinthifolia-Xhat are invasive in North America and examined their potential to spread further during projected climate *** used Species Distribution Models(SDMs)to predict future suitable areas for these species in North America under several proposed future climate *** and Maxent were used to develop SDMs,estimate current distributions,and predict future areas of suitable climate for each *** with the greatest predicted suitable climate in the future include the northeastern and the coastal northwestern regions of North *** size estimations demonstrate the possibility of extreme range loss for these invasives in the southeastern United States,while new areas may become suitable in the northeastern United States and southeastern *** findings show an overall northward shift of suitable climate during the next few decades,given projected changes in temperature and *** results can be utilized to analyze potential shifts in the distribution of these invasive species and may aid in the development of conservation and management plans to target and control dissemination in areas at higher risk for potential future invasion by these allelopathic species.

关键词： Allelopathy Invasive species Species distribution models ecological niche models Invasion impacts Multi-species assessment

Phylogenetic diversity of eastern Asia-eastern North America disjunct plants is mainly associated with divergence time

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2023年第1期45卷 27-35页

作者： Han-Yang Lin Miao Sun Ya-Jun Hao Daijiang Li Matthew A.Gitzendanner Cheng-Xin Fu douglas e.soltis Pamela S.soltis Yun-Peng Zhao Laboratory of Systematic and evolutionary Botany and Biodiversity College of Life SciencesZhejiang UniversityHangzhou 310058China Key Laboratory of Horticultural Plant Biology(Ministry of education) Huazhong Agricultural UniversityWuhan 430070China Florida Museum of Natural History University of FloridaGainesvilleFL 32611USA Department of Biology University of FloridaGainesvilleFL 32611USA Biodiversity Institute University of FloridaGainesvilleFL 32611USA Genetics Institute University of FloridaGainesvilleFL 32608USA School of Advanced Study Taizhou UniversityTaizhou 318000China

The underlying causes of biodiversity disparities among geographic regions have long been a fundamental theme in ecology and ***,the patterns of phylogenetic diversity(PD) and phylogenetic beta diversity(PBD) of congeners that are disjunctly distributed between eastern Asia-eastern North America(eA-eNA disjuncts) and their associated factors remain *** we investigated the standardized effect size of PD(SeS-PD),PBD,and potentially associated factors in 11natural mixed forest sites(five in eA and six in eNA) where abundant eA-eNA disjuncts *** found that the disjuncts in eNA possessed higher SeS-PD than those in eA at the continental scale(1.96vs-1.12),even though the number of disjunct species in eNA is much lower than in eA(128 vs 263).SeSPD of the eA-eNA disjuncts tended to decrease with increasing latitude in 11 *** latitudinal diversity gradient of SeS-PD was stronger in eA sites than in eNA *** on the unweighted unique fraction metric(UniFrac) distance and the phylogenetic community dissimilarity,PBD showed that the two northern sites in eA were more similar to the six-site eNA group than to the remaining southern eA *** on the standardized effect size of mean pairwise distances(SeS-MPD),nine of eleven studied sites showed a neutral community structure(-1.96 ≤SeS-MPD ≤1.96).Both Pearson’s r and structural equation modeling suggested that SeS-PD of the eA-eNA disjuncts was mostly associated with mean divergence ***,SeS-PD of the eA-eNA disjuncts was positively correlated with temperaturerelated climatic factors,although negatively correlated with mean diversification rate and community *** applying approaches from phylogenetics and community ecology,our work sheds light on historical patterns of the eA-eNA disjunction and paves the way for further research.

关键词： eA-eNA disjuncts Climatic factors Community assembly processes Diversification rate Divergence time Phylogenetic diversity

Mobilizing and integrating big data in studies of spatial and phylogenetic patterns of biodiversity

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2016年第6期38卷 264-270页

作者： douglas e.soltis Pamela S.soltis Florida Museum of Natural History University of Florida Genetics Institute University of Florida Department of Biology University of Florida

The current global challenges that threaten biodiversity are immense and rapidly *** biodiversity challenges demand approaches that meld bioinformatics,large-scale phylogeny reconstruction,use of digitized specimen data,and complex post-tree analyses(*** modeling,niche diversification,and other ecological analyses).Recent developments in phylogenetics coupled with emerging cyberinfrastructure and new data sources provide unparalleled opportunities for mobilizing and integrating massive amounts of biological data,driving the discovery of complex patterns and new hypotheses for further *** developments are not trivial in that biodiversity data on the global scale now being collected and analyzed are inherently *** ongoing integration and maturation of biodiversity tools discussed here is transforming biodiversity science,enabling what we broadly term"next-generation"investigations in systematics,ecology,and evolution(i.e.,"biodiversity science").New training that integrates domain knowledge in biodiversity and data science skills is also needed to accelerate research in these *** biodiversity science is crucial to the future of global *** cannot simply react to continued threats to biodiversity,but via the use of an integrative,multifaceted,big data approach,researchers can now make biodiversity projections to provide crucial data not only for scientists,but also for the public,land managers,policy makers,urban planners,and agriculture.

关键词： Biodiversity Big data Niche modeling Bioinformatics Phylogeny

Plant and fungal species interactions differ between aboveground and belowground habitats in mountain forests of eastern China

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2023年第5期66卷 1134-1150页

作者： Teng Yang Leho Tedersoo Pamela S.soltis douglas e.soltis Miao Sun Yuying Ma Yingying Ni Xu Liu Xiao Fu Yu Shi Han-Yang Lin Yun-Peng Zhao Chengxin Fu Chuan-Chao Dai Jack A.Gilbert Haiyan Chu State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Mycology and Microbiology Center University of TartuTartu 50409Estonia College of Science King Saud UniversityRiyadh 11451Saudi Arabia Florida Museum of Natural History University of FloridaGainesville 32611USA College of Horticulture and Forestry Sciences Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Systematic&evolutionary Botany and Biodiversity Group MOE Key Laboratory of Biosystems Homeostasis&ProtectionCollege of Life SciencesZhejiang UniversityHangzhou 310058China Jiangsu Key Laboratory for Microbes and Functional Genomics College of Life SciencesNanjing Normal UniversityNanjing 210003China Department of Pediatrics School of MedicineUniversity of CaliforniaSan DiegoLa Jolla 92093USA

Plant and fungal species interactions drive many essential ecosystem properties and processes;however,how these interactions differ between aboveground and belowground habitats remains unclear at large spatial ***,we surveyed 494 pairwise fungal communities in leaves and soils by Illumina sequencing,which were associated with 55 woody plant species across more than 2,000-km span of mountain forests in eastern *** relative contributions of plant,climate,soil and space to the variation of fungal communities were assessed,and the plant-fungus network topologies were *** phylogeny was the strongest predictor for fungal community composition in leaves,accounting for 19.1%of the *** soils,plant phylogeny,climatic factors and soil properties explained 9.2%,9.0%and 8.7%of the variation in soil fungal community,*** plant-fungus networks in leaves exhibited significantly higher specialization,modularity and robustness(resistance to node loss),but less complicated topology(e.g.,significantly lower linkage density and mean number of links)than those in *** addition,host/fungus preference combinations and key species,such as hubs and connectors,in bipartite networks differed strikingly between aboveground and belowground *** findings provide novel insights into cross-kingdom(plant-fungus)species co-occurrence at large spatial *** data further suggest that community shifts of trees due to climate change or human activities will impair aboveground and belowground forest fungal diversity in different ways.

关键词： bipartite network analyses foliar endophytic fungi modularity mountain forests plant phylogeny effect soil fungi specialization stability

Phylogenetic Analyses of Fagales Based on Multiple DNA Sequences from Three Genomes

在线全文

学校读者我要写书评

暂无评论

Phylogenetic Analyses of Fagales Based on Multiple DNA Seque...

Phylogenomics,reticulation,and biogeographical history of elaeagnaceae

第七届全国系统与进化植物学青年学术研讨会

作者： douglas e.soltis Pamela S.soltis Paul S.MANOS Department of Botany University of FloridaGainesvilleFL 32611USA Florida museum of Natural History University of FloridaGainesvilleFL 32611USA Department of Biology Duck Universitybox 90338DurhamNC 27708USA

Nucleotide sequences of six regions representing the three plant genomes were used to analyze the inter- and infra-familial relationships of Fagales. All 31 extant genera (excluding Ceuthostoma)

关键词： : Fagales Myricaceae multiple DNA sequences three genomes phylogeny combined analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Plant Diversity 2024年第6期46卷 683-697页

作者： Wei Gu Ting Zhang Shui-Yin Liu Qin Tian Chen-Xuan Yang Qing Lu Xiao-Gang Fu Heather R.Kates Gregory W.Stull Pamela S.soltis douglas e.soltis Ryan A.Folk Robert P.Guralnick De-Zhu Li Ting-Shuang Yi Germplasm Bank of Wild Species&Yunnan Key Laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Kunming College of Life Science University of Chinese Academy of SciencesKunming 650201China Key Laboratory of Plant Diversity and Specialty Crops Chinese Academy of SciencesBeijing 100093China Florida Museum of Natural History University of FloridaGainesvilleFL 32611United States Department of Biology University of FloridaGainesvilleFL 32611United States Department of Biological Sciences Mississippi State UniversityMississippiMS 39762United States School of Life Sciences Yunnan UniversityKunming 650504YunnanChina

The angiosperm family elaeagnaceae comprises three genera and ca.100 species distributed mainly in eurasia and North *** family-wide phylogenetic and biogeographic research on elaeagnaceae has been conducted,limiting the application and preservation of natural genetic ***,we reconstructed a strongly supported phylogenetic framework of elaeagnaceae to better understand interand intrageneric relationships,as well as the origin and biogeographical history of the *** this purpose,we used both nuclear and plastid sequences from Hyb-Seq and genome skimming approaches to reconstruct a well-supported phylogeny and,along with current distributional data,infer historical biogeographical *** phylogenetic analyses of both nuclear and plastid data strongly support the monophyly of elaeagnaceae and each of the three *** was resolved as sister to the well-supported clade of Hippophae and *** intrageneric relationships of elaeagnus and Hippophae were also well *** levels of nuclear gene tree conflict and cytonuclear discordance were detected within elaeagnus,and our analyses suggest putative ancient and recent *** inferred that elaeagnaceae originated at ca.90.48 Ma(95%CI?89.91e91.05 Ma),and long-distance dispersal likely played a major role in shaping its intercontinentally disjunct *** work presents the most comprehensive phylogenetic framework for elaeagnaceae to date,offers new insights into previously unresolved relationships in elaeagnus,and provides a foundation for further studies on classification,evolution,biogeography,and conservation of elaeagnaceae.

关键词： Biogeography Cytonuclear discordance Hybridization Phylogeny Long-distance dispersal

effects of overburden characteristics on dynamic failure in underground coal mining

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2017年第1期27卷 121-129页

作者： Lawson Heather e. Tesarik douglas Larson Mark K Abraham Habte NIOSH Office of Mine Safety and Health ResearchGround Control BranchSpokane WA 99207USA

Dynamic failures, or ‘‘bumps", remain an imperative safety concern in underground coal mining, despite significant advancements in engineering controls. The presence of spatially discrete, stiff roof units are one feature that has been linked to these events. However, an empirical stratigraphic review indicates that no significant difference exists in the relative commonality of discrete units between bumping and non-bumping deposits. Instead an apparent relationship exists between reportable bumping and the overall stiffness of the host rock. However, this initial study is too simplistic to be conclusive; to weight the relative impact of changes in a single variable, such as the thickness or location of sandstone members, it must be examined in isolation—i.e., in a setting where all other variables are held *** modelling provides this setting, and the effects of variability in a stiff discrete member in a hypothetical longwall mining scenario are investigated within the context of three stratigraphic ‘‘types",Compliant, Intermediate and Stiff. A modelling experiment examines changes in rupture potential in stiff roof units for each stratigraphic type as discrete unit thickness and location are manipulated through a range of values. Results suggest that the stiff-to-compliant ratio of the host rock has an impact on the relative stress-inducing effects of discrete stiff members. In other words, it is necessary to consider both the thickness and the distance to the seam, within the context of the host rock, to accurately anticipate areas of elevated rupture-induced hazard; acknowledging the presence of a discrete unit within the overburden in general terms is an insufficient indicator of risk. This finding helps to refine our understanding of the role of individual stiff, strong roof members in bumping phenomena, and suggests that a holistic view of overburden lithology and site-specific numerical modelling may be necessary to improve miner safety.

关键词： Dynamic failure Coal mining Bumps Bounces

Measurement of in-bore side loads and comparison to first maximum yaw

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2016年第2期12卷 106-112页

作者： Donald e.CARLUCCI Ryan DeCKeR Julio VeGA douglas RAY U.S.Army ARDeC RDAR-DSM Building 942nd FloorPicatinnyNJ 07806-5000USA U.S.Army ARDeC RDAR-eIQ-SB Building 62PicatinnyNJ 07806-5000USA

In-bore yaw of a projectile in a gun tube has been shown to result in range loss if the yaw is significant. An attempt was made to determine if relationships between in-bore yaw and projectile First Maximum Yaw(FMY) were observable. experiments were conducted in which pressure transducers were mounted near the muzzle of a 155 mm cannon in three sets of four. each set formed a cruciform pattern to obtain a differential pressure across the projectile. These data were then integrated to form a picture of what the overall pressure distribution was along the side of the projectile. The pressure distribution was used to determine a magnitude and direction of the overturning moment acting on the projectile. This moment and its resulting angular acceleration were then compared to the actual first maximum yaw observed in the test. The degree of correlation was examined using various statistical techniques. Overall uncertainty in the projectile dynamics was between 20% and 40% of the mean values of FMY.

关键词：偏航负载测量压力分布压力传感器发射动力学倾覆力矩角加速度统计技术

Helicobacter pylori recurrence after eradication in Latin America:Implications for gastric cancer prevention

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2017年第4期9卷 184-193页

作者： Juan e Corral Robertino Mera Corey W Dye douglas R Morgan Division of Gastroenterology and Hepatology Mayo Clinic Division of Gastroenterology Hepatologyand NutritionVanderbilt University Department of Medicine University of Miami Miller School of Medicine

To estimate Helicobacter pylori (H. pylori) recurrence rate in Latin America, a region with a significant H. pylori prevalence and gastric cancer burden. MeTHODSPubMed, LILACS, ScieLO, Cochrane databases and abstracts from relevant meetings were reviewed. Information collected included: Participants’ characteristics, recruitment strategy, diagnostic modality, treatment arms, follow-up and recurrence rates. Recurrence was calculated using 100-patients-year rates, and data were pooled using a random effects model. The I2 statistic assessed between study heterogeneity. Meta-regression analyses evaluated for effect modifying variables. ReSULTSLiterature search yielded 163 articles. Twelve studies involving 4848 patients from 9 countries met inclusion criteria. Four hundred and thirty-two reinfections were recorded in 5487 person-years of follow-up. Pooled analysis showed a recurrence rate of 7.9 cases per 100 person-years (95%CI: 5.3-10.5). Meta-regression revealed that neither the antibiotic schema, a second antibiotic course, nor the diagnostic modality had an impact on the observed risk of recurrence. The recurrence rate in the first year after treatment, predominantly recrudescence, was 11.2 (6.1-16.4) per 100 patient years. Recurrence in subsequent years, was only 6.2 (3.8-8.7). CONCLUSIONH. pylori recurrence rates in Latin America are significant, and with geographic variability, yet are acceptable based upon the current literature for consideration of large scale intervention trials. Further research in Latin America is warranted to evaluate the efficacy, cost-effectiveness, and potential adverse outcomes of proposed eradication programs.

关键词： Gastric cancer Reinfection Hispanic Helicobacter pylori Latin America