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New patterns of the tree beta diversity and its determinants in the largest savanna and wetland biomes of South America

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Plant Diversity 2023年第4期45卷 369-384页

作者： Karla J.P.Silva-souza maíra G.Pivato Vinícius C.Silva Ricardo f.Haidar Alexandre f.souza Departamento de Ecologia Universidade Federal do Rio Grande do NorteRNBrazil Curso de Engenharia Ambiental Universidade Federal do TocantinsTOBrazil

Clear and data-driven bioregionalizations can provide a framework to test hypotheses and base biodiversity *** we used occurrence and abundance data in combination with objective analytical methods to propose two bioregionalization schemes for tree species of the Cerrado and the Pantanal in South *** also evaluated the contribution of three sets of determinants of the occurrence-and abundance-based *** compiled data on tree species composition from 894 local assemblages based on species occurrences,and from 658 local assemblages based on species *** used an unconstrained community-level modelling approach and clustering techniques to identify and map tree subregions for the occurrence and the abundance data sets,*** clustering analyses were conducted to investigate floristic affinities between the subregions and to map broader floristic *** used multinomial logistic regression models,deviance partitioning,and rank-sum tests to assess the main subregion *** identified 18 occurrence-and four abundance-based subregions in the *** hierarchical classifications grouped the occurrence-based subregions into nine floristic zones and abundance-based subregions into two broad floristic *** in subregions were explained mainly by environmental factors and spatial structure in both occurrence and abundance data *** occurrence-and abundance-based subregions are complementary approaches to disentangle macroecological patterns and to plan conservation efforts in the Cerrado and the *** findings based on occurrence data revealed more complex and interdigitated boundaries between subregions of tree species than previously *** environment,historical stability,and human effects act in a synergetic way on the distribution of the ***,the relevance of contemporary environmental factors to the subregion patterns we found alert us to the profound im

关键词： Cerrado Pantanal Savanna Biogeographical regionalization Biodiversity hotspot South America

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Long-lasting effects of unplanned logging on the seed rain of mixed conifer-hardwood forests in southern South America

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Journal of forestry Research 2021年第4期32卷 1409-1418页

作者： Alexandre f.souza Angela Luciana deÁvila maristela M.Araújo Solon Jonas Longhi Departament of Ecology CBRio Grande Do Norte Federal UniversityCentral CampusLagoa NovaNatal 59072-970RNBrazil forest Growth Department Freiburg Im BreisgauBaden-Vurtemberga Forest Research InstituteWonnhaldestraße 4Freiburg im Breisgau 79104Germany forest Engineering Postgraduate Program Forestry DepartmentSanta Maria Federal UniversityRoraima Av.s/nCamobiSanta Maria 97105-900RSBrazil

Understanding the effects of disturbance on seed rain is critical to predict changes in forest species composition and *** effects on seed rain in a mixed conifer-hardwood forest complex in southern Brazil were *** year of seed rain data were collected from a large-scale observational experiment in logged and protected forests and quantity and average seed size weighted by species abundance(CWM)were compared between old-growth and logged stands 55 years after logging *** these data,variations in frequency of functional groups of species in the seed rain were examined to see if they could be attributed to *** show that the number of seeds per trap was highly right-skewed,ranging from 13 to 12,788 seeds per trap in one *** rain was affected by logging history,with seed traps in old-growth plots receiving significantly less seeds than traps in logged *** species included mean seed size weighted by species abundance were significantly smaller in logged than in old-growth *** difference persisted after the exclusion of Arawcaria a large-seeded pioneer which was intensively logged,although the difference of seed size between the two forest classes was greatly *** abundance in the seed rain differed significantly from the established tree community,between logged and oldgrowth *** composition of the seed rain was much more variable than the composition of the established tree community and its points more scattered over the ordination space than the points corresponding to the protected *** number of collected seeds across different functional groups of species significantly differed between logged and old-growth *** seed rain of logged forests reflects their arrested succes sion as indicated by reduced abundance of functional groups such as pioneers,large seeded pioneers and A raucaria,as well as reduced functional diversity.S eed rain differences between logged and old-

关键词： Arrested succession Brazil Logging Long-lived pioneers Seed rain

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In the lack of extreme pioneers:trait relationships and ecological strategies of 66 subtropical tree species

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Journal of Plant Ecology 2015年第4期8卷 359-367页

作者： Cristiane forgiarini Alexandre f.souza Solon J.Longhi Juliano M.Oliveira Programa de Pós-Graduação em Biologia Diversidade e Manejo da Vida SilvestreUniversidade do Vale do Rio dos SinosAv.UNISINOS 950C.P.275São Leopoldo 93022-000RSBrazil Departamento de Ecologia CBUniversidade Federal do Rio Grande do NorteCampus UniversitárioLagoa NovaNatal 59072-970RNBrazil PPG-Engenharia florestal Dep.de Ciências FlorestaisUniversidade Federal de Santa MariaAv.Roraimas/nBairro CamobiSanta Maria 97105-900RSBrazil Present address:Departamento de Botânica Instituto BiociênciasUniversidade Federal do Rio Grande do SulAv.Bento Gonçalves9500Prédio 43433Campus AgronomiaPorto Alegre 91501-970RSBrazil.

Aims Despite the growing interest in the topic of functional ecology,there are still forest regions that have not been examined,as most work has been done in the *** issues include the strength of a growth-mortality trade-off in trees(originally identified for seedlings)and the nature of the association between plant traits and vital rates,if *** objectives were to examine whether(i)ecological strategies in south american mixed forests are organ-ized along the fast competitor×slow stress-tolerator and height gradients as the main strategy axes depicted in the overall trait and vital rate correlation structure,and(ii)a tentative path model we proposed can explain the patterns of covariation among traits and vital *** We studied a different habitat(subtropical mixed conifer-hardwood forests)and region(brazilian atlantic forest)from the majority of related studies in forests,carried out in the Neotropical *** on total height,stem slenderness,crown depth,wood density,specific leaf area,leaf and seed length,seed dispersal mode,annual mortality,diameter relative growth rate and relative growth rate under favorable conditions were measured in southern brazil for 66 tree *** were subjected to principal components analysis and path *** data on saplings and treelets were analyzed through *** findingsstudied traits were reduced to four principal *** components analysis produced axes that fit the resource acquisition versus resource-conservation and the height-mortality trade-offs,although the former was split into two distinct *** size and seed dispersal mode appeared independently of these axes.a path model showed that leaf length and specific leaf area caused direct changes in trunk slenderness and,indirectly through growth,affected *** trade-offs between growth and survivorship and between wood density and stem slenderness trade-offs were not *** may

关键词： Araucaria angustifolia atlantic forest ecological strategies life-history trade-offs mixed forests

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Morphology engineering of ZnO micro/nanostructures under mild conditions for optoelectronic application

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International Journal of Minerals,Metallurgy and materials 2025年第2期32卷 498-503页

作者： Liang Chu Haoyu Shen Hudie Wei Hongyu Chen Guoqiang ma Wensheng Yan Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China School of Applied Physics and materials Wuyi UniversityJiangmen 529020China

Zinc oxide(ZnO)serves as a crucial functional semiconductor with a wide direct bandgap of approximately 3.37 *** reaction is commonly used in the synthesis of ZnO micro/nanostructures,given its low cost,simplicity,and easy ***,ZnO morphology engineering has become desirable through the alteration of minor conditions in the reaction process,particularly at room *** this work,ZnO micro/nanostructures were synthesized in a solution by varying the amounts of the ammonia added at low temperatures(including room temperature).The formation of Zn^(2+)complexes by ammonia in the precursor regulated the reaction rate of the morphology engineering of ZnO,which resulted in various structures,such as nanoparticles,nanosheets,microflowers,and single ***,the obtained ZnO was used in the optoelectronic application of ultraviolet detectors.

关键词： morphology engineering low temperature ZnO nanosheets microflowers ultraviolet detector

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Constructing Donor–Acceptor‑Linked COfs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COfs)based on intramolecular charge transfer *** other reported COfbased solid-state electrolyte,the developed concept with D–A-linked COfs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity f-based ligand in COf electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LifePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor f atoms,which effectively expedites electron transferring from porphyrin to f-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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Unraveling the impacts of intermolecular interaction on morphology evolution for highly efficient organic solar cells and modules

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Science China Chemistry 2025年第1期68卷 264-272页

作者： Xueqing ma Yingying Cheng Yuqiang Liu Xinming Zheng Guangliu Ran Hongxiang Li Xinyue Cui Andong Zhang Wenkai Zhang Pei Cheng Wenchao Huang Zhishan Bo Beijing Key Laboratory of Energy Conversion and Storage materials College of Chemistry Beijing Normal University College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textiles Qingdao University Key State Laboratory of Advanced Technology for materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of Technology Department of Physics and Applied Optics Beijing Area major Laboratory Center for Advanced Quantum Studies Beijing Normal University State Key Laboratory of Polymer materials Engineering College of Polymer Science and Engineering Sichuan University

Understanding the effect of intermolecular interaction on the growth dynamic of active layers is critical for advancing organic solar cells(OSCs). However, the diverse structure of donors and acceptors makes the research challenging. Additives with customizable structures and properties could simplify this complexity. Herein, we meticulously tailor two additives of 3,4-ethylenedioxythiophene(EDOT) and 2,5-dibromo-3,4-ethylenedioxythiophene(DBEDOT), possessing distinct intermolecular interaction features to elaborate the inherent relationship. It is found that varied interaction strengths can alter film formation processes. The enhanced intermolecular interaction between the DBEDOT and non-fullerene acceptor BTP-e C9-4f results in pre-aggregation and longer crystallization duration of BTP-e C9-4f, facilitating the formation of films with compact molecular packing and decent phase separation. Thus, exciton dissociation and charge transport become more efficient. finally, devices processed with DBEDOT exhibit a remarkable power conversion efficiency of 19.35% in small-area OSCs and 14.11% in bladecoated 5 cm × 5 cm organic solar mini-modules. Especially, OSCs can maintain 80% of their initial efficiency after continuous annealing at 85 °C for over 2,100 h.

关键词： organic solar cell non-fullerene acceptor film growth molecular packing intermolecular interaction

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Steel surface defect detection based on lightweight YOLOv7

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Optoelectronics Letters 2025年

作者： Shi Tao Wu Rongxin Zhu Wenxu ma Qingliang School of Electrical Engineering and Automation， Tianjin University of Technology North China University of Science and Technology， College of Electrical Engineering Guangzhou Institute of Measurement and Testing Technology

Aiming at the problems of low detection efficiency and difficult positioning of traditional steel surface defect detection methods， a lightweight steel surface defect detection model based on YOLOv7 is proposed. first， a CSS Block module is proposed， which uses more lightweight operations to obtain redundant information in the feature map， reduces the amount of computation， and effectively improves the detection speed. Secondly， the improved SPPCSPC structure is adopted to ensure that the model can also pay attention to the defect location information while predicting the defect category information， obtain richer defect features. In addition， the convolution operation in the original model is simplified， which significantly reduces the size of the model and helps to improve the detection speed. finally， using EIOU Loss to focus on high-quality Anchors， speed up convergence and improve positioning accuracy. Experiments were carried out on the NEU-DET steel surface defect dataset. Compared with the original YOLOv7 model， the number of parameters of this model was reduced by 40%， the fPS reached 112， and the average accuracy reached 79.1%.， the detection accuracy and speed have been improved， which can meet the needs of steel surface defect detection.

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数字普惠金融的农户增收效应与作用机制——基于陕西省9市18县的调查数据

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西北农林科技大学学报（社会科学版） 2025年第1期25卷 101-110页

作者：马红刚西安交通大学经济与金融学院西安710049

拓展农民增收致富渠道是完善城乡融合发展体制机制的关键环节,也是中国实现共同富裕的核心目标。基于陕西省9市18县(区)3658份农户微观调研数据,运用逻辑回归模型与中介效应模型,分析了数字普惠金融对农户家庭收入的影响及其作用机制。... 详细信息

拓展农民增收致富渠道是完善城乡融合发展体制机制的关键环节,也是中国实现共同富裕的核心目标。基于陕西省9市18县(区)3658份农户微观调研数据,运用逻辑回归模型与中介效应模型,分析了数字普惠金融对农户家庭收入的影响及其作用机制。研究表明,数字普惠金融对农户家庭收入具有显著的正向影响,数字普惠金融发展水平越高的县域,农户的家庭收入水平越高,特别是在数字普惠金融的使用深度、覆盖广度与数字化程度方面,影响尤为显著。进一步探讨作用机制后发现,缓解家庭金融约束、促进信息对称与扩大农业经营规模是数字普惠金融促进农户增收的主要途径。此外,数字普惠金融的增收效应存在异质性,农村居民的金融素养与金融市场参与度越高,数字普惠金融对农户家庭收入的正向影响越显著。

关键词：数字普惠金融农户增收信息获取农业经营规模信贷约束

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Dietary supplementation with curcumin-loaded nanocapsules in lambs:Nanotechnology as a new tool for nutrition

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Animal Nutrition 2021年第2期7卷 521-529页

作者： Hiam marcon Luiz G.Griss Vitor L.Molosse Bruno G.O.Cecere Davi f.Alba Karoline W.Leal Gabriela M.Galli Carine f.souza matheus D.Baldissera Samanta Gundel Vitória de A.Bassotto Aline f.Ourique marcelo Vedovatto Aleksandro S.Da Silva Department of Animal Science Universidade Do Estado de Santa Catarina(UDESC)ChapecóSCBrazil Graduate Program in Animal Science UDESCChapecóSCBrazil Department of Physiology and Pharmacology Universidade Federal de Santa Maria(UFSM)RSBrazil Universidade franscicana Santa MariaRSBrazil Graduate Program in Animal Science Universidade Estadual de Mato Grosso Do SulAquidauanaMSBrazil

Curcumin-containing nanocapsule powder formulations have not been used in ruminant feed to date,despite the fact that curcumin is known to be a functional food *** objective of this study was to determine whether ethyl polymethacrylate(Eudragit L-100)nanocapsules loaded with curcumin(N-CU)would improve health and growth of ***-two male Lacaune lambs(body weight[BW]=16±0.99 kg;45 d of age)were randomly assigned to 1 of 4 treatments:T0,T1,T2 and T4,representing supplementation of curcumin at 0,1,2,and 4 mg/kg concentrate,*** animals in each treatment were allocated in 4 pens of 2 lambs each(8 lambs per treatment).The experiment lasted 17 d,with samples and measurements collected on d 0,7,12,and *** T2 lambs had greater average daily gain than T0 *** analysis showed that the ideal dose of N-CU to enhance weight gain was 1.89 mg/kg *** were significant interactions(Pfor hematological variables,particularly for increases in erythrocytes(T2)and re-ductions in counts of leukocytes,neutrophils,and lymphocytes in T1 and *** were significant interactions between treatment×time for total protein,globulin,urea,and triglyceride ***-lation of the antioxidant system was also *** were increased levels of non-protein thiols(NPSH),as well as increased activities of superoxide dismutase(SOD)and glutathione S-transferase(GST)in the supplemented *** of reactive oxygen species(ROS)were lower in the serum of sup-plemented *** general,the 4 mg/kg dose had no positive effects on growth or *** was an unexpected result,given the known properties of *** together,these findings suggest that addition of low concentrations of nanoencapsulated curcumin(T1 and T2)in lamb feed improves health,minimizing oxidative stress and generates anti-inflammatory effects that may have contributed indi-rectly to greater weight *** potentiate the effe

关键词： Antioxidant Anti-inflammatory Curcuma longa Performance Sheep

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Morphology and phylogeny of root-endophytic fungus Periconia igniaria

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Studies in fungi 2019年第1期4卷 274-281页

作者： D’souza ma Rana S Singh SK Department of Botany St.Xavier’s CollegeMapusaGoa-403507India National fungal Culture Collection of India Biodiversity and Palaeobiology GroupMACS'Agharkar Research InstituteGG Agarkar Road411004 PuneIndia

Periconia igniaria,isolated as an endophytic fungus from roots of Cheilocostus speciosus from Calangute,Bardez,Goa,India was described in this *** identity of the endophytic isolate was based on asexual-morphs,cultural characteristics and phylogenetic analyses of internal transcribed spacer rDNA sequence *** our knowledge,this is the first report of this taxon as root endophyte of Cheilocostus speciosus from Western Ghats forests,Goa,India.

关键词： Cheilocostus speciosus Goa Taxonomy Western Ghats

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