期刊文献+
共找到950篇文章
< 1 2 48 >
每页显示 20 50 100
白垩纪缅甸琥珀中小型花蚤一新种(鞘翅目:花蚤科)及对花蚤科的分类学修订 认领 被引量:1
1
作者 包童 《古生物学报》 CSCD 北大核心 2020年第1期112-118,共7页
根据产自缅甸北部白垩纪中期克钦琥珀中的一块小型花蚤化石标本,建立1新种--小多刺花蚤(Multispinus parvus sp.nov.),归于花蚤科(Mordellidae)。同时,对缅甸琥珀中已发现的花蚤和泛花蚤进行了重新观察和研究,重点分析了其形态学特征并... 根据产自缅甸北部白垩纪中期克钦琥珀中的一块小型花蚤化石标本,建立1新种--小多刺花蚤(Multispinus parvus sp.nov.),归于花蚤科(Mordellidae)。同时,对缅甸琥珀中已发现的花蚤和泛花蚤进行了重新观察和研究,重点分析了其形态学特征并认真考虑了相关分类学依据,将短尾花蚤科(Apotomouridae)修订为花蚤科之下的短尾花蚤亚科(Mordellidae:Apotomourinae)。短尾花蚤中普遍存在的臀锥完全不发育,不可作为区分于花蚤科的衍征。白垩纪中期琥珀中发现的花蚤化石类群体型均小,这也许与白垩纪中期生态环境和栖息地被子植物花朵形态有关。 展开更多
关键词 甲虫 花蚤科 缅甸琥珀 白垩纪 分类学 古生态
RNA interference in Colorado potato beetle(Leptinotarsa decemlineata):A potential strategy for pest control 认领
2
作者 MA Mei-qi HE Wan-wan +2 位作者 XU Shi-jing XU Le-tian ZHANG Jiang 《农业科学学报:英文版》 SCIE CAS CSCD 2020年第2期428-437,共10页
Colorado potato beetle(CPB),Leptinotarsa decemlineata,is a notorious destructive pest that mainly feeds on the leaves of potato and several other solanaceous plants.CPB is widely recognized for its adaptation to a rem... Colorado potato beetle(CPB),Leptinotarsa decemlineata,is a notorious destructive pest that mainly feeds on the leaves of potato and several other solanaceous plants.CPB is widely recognized for its adaptation to a remarkable variety of host plants and diverse climates,and its high resistance to insecticides and Bacillus thuringiensis toxins.RNA interference(RNAi)is a sequence-specific,endogenous gene silencing mechanism evoked by small RNA molecules that is used as a robust tool for virus and pest control.RNAi has been extensively tested for CPB management by employing various target genes and delivery methods.This article reviews the screening of RNAi target genes,efficient RNAi delivery systems,and factors affecting RNAi efficiency in CPB,which may help understand the mechanisms of RNAi and its application in CPB control strategy. 展开更多
关键词 Colorado POTATO BEETLE DOUBLE-STRANDED RNA PEST control RNA interference RNAi delivery system
在线阅读 下载PDF
The flexural property and its synergistic mechanism of multibody molded beetle elytron plates 认领
3
作者 YU XinDi ZHANG XiaoMing +3 位作者 CHEN JinXiang ZHAO CaiQi ZHAO TiDong FU YaQin 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2020年第5期768-776,共9页
To improve the applications of beetle elytron plates(BEPs,which are biomimetic sandwich plates inspired by beetle elytra),the flexural performance and its synergistic mechanism of multibody molded BEPs were investigat... To improve the applications of beetle elytron plates(BEPs,which are biomimetic sandwich plates inspired by beetle elytra),the flexural performance and its synergistic mechanism of multibody molded BEPs were investigated via cantilever testing and finite element method(FEM).The results are summarized as follows.(1)Although debonding damage causes failure of the multibody molded BEPs and honeycomb plate and the reasonable range of trabecular size for BEPs is narrow,both the optimal loading capacity per mass and failure deformation of the BEPs are over two times those of the honeycomb plate.(2)A flexural synergistic mechanism is revealed in the trabecular-honeycomb core structure of BEPs;this mechanism causes the maximum deformation of core structure to gradually transfer from the honeycomb wall to the trabeculae with the increase inη(the ratio of the trabecular radius to the distance between the center points of two trabeculae),which means the different stretching behaviors in these core structures.(3)Unlike the compressive mechanism of BEPs,by controlling and balancing the deformation degrees of the trabeculae and honeycomb walls,the flexural mechanism achieves a minimum core deformation and an optimal flexural performance.These results suggest a qualitative relationship between the deformation behavior of trabecular-honeycomb core structure and bending performance of the whole BEP,and provide a solid foundation for subsequent research and the considerable application potential of this biomimetic sandwich structure in many fields. 展开更多
关键词 beetle elytra BEP biomimetic structure sandwich structure honeycomb plate flexural property
The morphology of the antennal lobe of Ambrostoma quadriimpressum(Coleoptera:Chrysomelidae) 认领
4
作者 Jihua Hu Fan Sun 《林业研究:英文版》 SCIE CAS CSCD 2020年第5期2005-2012,共8页
The structure of the primary olfactory brain center was studied in male and female adult Ambrostoma quadriimpressum by means of a series of histological sections labeled using the reduced-silver-stain technique.The an... The structure of the primary olfactory brain center was studied in male and female adult Ambrostoma quadriimpressum by means of a series of histological sections labeled using the reduced-silver-stain technique.The antennal lobe was elliptical,and the total number of glomeruli was approximately 50 in the antennal lobe in both sexes.There was no sexual dimorphism with respect to the size of the antennal lobe or the number and shape of glomeruli. 展开更多
关键词 OLFACTION GLOMERULI Antennal lobe Leaf beetle
在线阅读 下载PDF
《全唐诗》中的文化甲虫及其意象浅析 认领
5
作者 王与琳 任国栋 《教育教学论坛》 2020年第33期106-111,共6页
文化昆虫学(Cultural Entomology)是研究昆虫在人类实践中给予其精神和灵魂滋养的科学,它由包括文化甲虫在内的多个昆虫学分支组成。昆虫文化是中华文化的特色组成部分,具有强大的生命力,它伴随汉文化而成长,伴随中华文明而兴旺。甲虫... 文化昆虫学(Cultural Entomology)是研究昆虫在人类实践中给予其精神和灵魂滋养的科学,它由包括文化甲虫在内的多个昆虫学分支组成。昆虫文化是中华文化的特色组成部分,具有强大的生命力,它伴随汉文化而成长,伴随中华文明而兴旺。甲虫文化是文化昆虫学的一个重要分支,是人类在与甲虫社会的密切交往中产生的精神文化。唐代是我国历史上诗歌极为昌盛的朝代,产生了大量昆虫文化,其中甲虫文化是其文苑中标价浓浓的一笔。该文对《全唐诗》中昆虫诗进行了较为全面的整理,并针对其中的甲虫诗作了系统的梳理,追溯了唐代社会的变迁中甲虫诗作的发展情况和唐代甲虫诗作所蕴藏的丰富的文化内涵。 展开更多
关键词 全唐诗 昆虫 甲虫 文化内涵
在线阅读 下载PDF
Taxonomy of the genus Omonadus Mulsant & Rey(Coleoptera:Anthicidae) from China, with a newly recorded species 认领
6
作者 Yuchen Zhao Xinpu Wang 《动物分类学报:英文版》 CSCD 2020年第1期40-49,共10页
The genus Omonadus Mulsant & Rey from China is reviewed, including a newly recorded species, O. cintomus(Marseul) and another four species and subspecies: O. confucii confucii(Marseul), O. confucii addendus(Krekic... The genus Omonadus Mulsant & Rey from China is reviewed, including a newly recorded species, O. cintomus(Marseul) and another four species and subspecies: O. confucii confucii(Marseul), O. confucii addendus(Krekich-Strassoldo), O. floralis(Linnaeus) and O. formicarius formicarius(Goeze). All species checked are redescribed and illustrated. An identification key for this species from China is presented. The study was based on specimens from the Insect Collection, School of Agriculture, Ningxia University(SANXU) and Institute of Zoology, Chinese Academy of Sciences(IZCAS). 展开更多
关键词 Omonadus Anthicinae NEWLY RECORDED SPECIES narrow-necked grain BEETLE
Genetic structure of the invasive Colorado potato beetle Leptinotarsa decemlineata populations in China 认领
7
作者 YANG Fang-yuan GUO Jian-jun +1 位作者 LIU Ning ZHANG Run-zhi 《农业科学学报:英文版》 SCIE CAS CSCD 2020年第2期350-359,共10页
The Colorado potato beetle(CPB),Leptinotarsa decemlineata Say,is an infamous invasive species worldwide.It was first found in Xinjiang Uygur Autonomous Region of China in 1993 and spread to Northeast China in 2013.To ... The Colorado potato beetle(CPB),Leptinotarsa decemlineata Say,is an infamous invasive species worldwide.It was first found in Xinjiang Uygur Autonomous Region of China in 1993 and spread to Northeast China in 2013.To better understand the genetic structure and the diffusion path of their populations in China,we used nine polymorphic microsatellite loci to elucidate the genetic diversity,genetic structure and gene flow among nine CPB populations across Xinjiang and Northeast China.The results show that:(1)Two genetically separated clusters were identified by phylogenetic tree,principal coordinate analysis(PCoA)and Bayesian cluster method.Cluster one contained populations from Xinjiang,China.Cluster two contained populations from Northeast China.A genetic differentiation existed between the two clusters.(2)Three populations in Northeast China hold an obvious genetic differentiation according to the phylogenetic tree and PCoA,indicating that multiple introductions may occur in Northeast China.(3)The Altay population in Xinjiang showed a closer genetic relationship with the populations in Northeast China which may be due to the fact that they collectively originated in neighboring Russia.(4)Among all populations,Mulei and Wusu had obvious gene migrations from Tacheng,indicating that the inland populations are most likely to originate from Tacheng,Xinjiang. 展开更多
关键词 Colorado POTATO BEETLE genetic variation ALIEN INVASIVE species MICROSATELLITE marker
在线阅读 下载PDF
Heat sensitivity of eggs attributes to the reduction in Agasicles hygrophila population 认领
8
作者 Dong Jia Xiao-Fang Yuan +4 位作者 Yan-Hong Liu Chao-Qian Xu Yuan-Xin Wang Ling-Ling Gao Rui-Yan Ma 《昆虫科学:英文版》 SCIE CAS CSCD 2020年第1期159-169,共11页
Agasicles hygrophila has been introduced worldwide as a control agent for the invasive weed Alternanthera philoxeroides.However,global warming has potential impact on its controlling efficacy.The aim of this research ... Agasicles hygrophila has been introduced worldwide as a control agent for the invasive weed Alternanthera philoxeroides.However,global warming has potential impact on its controlling efficacy.The aim of this research was to explore the primary factors responsible for the greatly reduced A.hygrophila population in hot summers.To imitate the temperature conditions in summers,different developmental stages of hygrophila were treated with high temperatures from 32.5℃ to 45℃ for 1-5 h.Based on the survival rate,the heat tolerance of each developmental stage was ranked from lowest to highest as follows:egg,1st,2nd,3rd instar larva,adult and pupa.Eggs showed the lowest heat tolerance with 37.5℃ as the critical temperature affecting larval hatching.Heat treatment of the A.hygrophila eggs at 37.5℃ for 1 h decreased the hatch rate to 24%.Our results indicated that when compared with the control at 25℃,1 h treatment at 37.5℃ prolonged the duration of the egg stage,shortened the duration of oviposition and total longevity,and changed the reproductive pattern of A.hygrophila.The net reproductive rate,intrinsic rate and finite rate were all significantly reduced.The results suggest that low heat tolerance of the eggs was the major factor responsible for the reduction of A.hygrophila populations,and the key temperature was 37.5°C.Therefore,appropriate measures should be taken to protect eggs in order to maintain the efficacy of A.hygrophila in the biological control of A.philoxeroides in hot summers. 展开更多
关键词 age-stage two-sex life table alligator weed flea beetle heat tolerance population dynamics
BAS-ADAM:An ADAM Based Approach to Improve the Performance of Beetle Antennae Search Optimizer 认领
9
作者 Ameer Hamza Khan Xinwei Cao +2 位作者 Shuai Li Vasilios N.Katsikis Liefa Liao 《自动化学报:英文版》 EI CSCD 2020年第2期461-471,共11页
In this paper,we propose enhancements to Beetle Antennae search(BAS)algorithm,called BAS-ADAIVL to smoothen the convergence behavior and avoid trapping in localminima for a highly noin-convex objective function.We ach... In this paper,we propose enhancements to Beetle Antennae search(BAS)algorithm,called BAS-ADAIVL to smoothen the convergence behavior and avoid trapping in localminima for a highly noin-convex objective function.We achieve this by adaptively adjusting the step-size in each iteration using the adaptive moment estimation(ADAM)update rule.The proposed algorithm also increases the convergence rate in a narrow valley.A key feature of the ADAM update rule is the ability to adjust the step-size for each dimension separately instead of using the same step-size.Since ADAM is traditionally used with gradient-based optimization algorithms,therefore we first propose a gradient estimation model without the need to differentiate the objective function.Resultantly,it demonstrates excellent performance and fast convergence rate in searching for the optimum of noin-convex functions.The efficiency of the proposed algorithm was tested on three different benchmark problems,including the training of a high-dimensional neural network.The performance is compared with particle swarm optimizer(PSO)and the original BAS algorithm. 展开更多
关键词 Adaptive moment estimation(ADAM) BEETLE ANTENNAE search(BAM) gradient ESTIMATION METAHEURISTIC optimization nature-inspired algorithms neural network
在线阅读 下载PDF
Effect of scots pine forest management on soil properties and carabid beetle occurrence under post-fire environmental conditions——a case study from Central Europe 认领
10
作者 Ewa Błońska Bartłomiej Bednarz +2 位作者 Magdalena Kacprzyk Wojciech Piaszczyk Jarosław Lasota 《森林生态系统:英文版》 SCIE CSCD 2020年第3期366-377,共12页
Background: Fires have a fundamental impact on phytocoenoses and, depending on the size of the fire, can have a positive or negative effect. The role of fires in the formation of the species composition of plants, res... Background: Fires have a fundamental impact on phytocoenoses and, depending on the size of the fire, can have a positive or negative effect. The role of fires in the formation of the species composition of plants, restoration of stands and changes in soil properties is well studied. However, the long-term relationship between forest management methods, soil properties and epigeic entomofauna assemblages in post-fire areas is still not clear. The effects of Scots pine stand management methods on biochemical soil properties and ground beetle assemblages in the largest post-fire area in Central Europe after the second World were investigated. The study was conducted in the Rudy Raciborskie Forest district in southern Poland. The soil properties and epigeic beetle community structure were analysed. The research covered areas with natural and artificial pine regeneration, which were subjected to various care treatments.Results: The tendency for higher accumulations of organic matter in the soil of stands that underwent natural regeneration was proven. The stimulating role of soil organic carbon on the activity of dehydrogenases in the soil of naturally renewed areas with silvicultural treatment(NRAT) was noted. Regardless of the manner of stand regeneration, the activity of β-glucosidase was higher in the areas in which breeding treatments were practised.Furthermore, managed forest stands presented a higher abundance of carabid beetles than stands without treatment practices. Thirteen epigeic beetle species from the families Geotrupidae, Carabidae, Curculionidae,Cerambycidae and Silphidae were captured, with beetles from the first two families being the most numerous. Rare epigeal carabid species in the fauna of Poland and Europe, such as Carabus glabratus(Paykull) and Carabus auronitens Fabr., found appropriate habitat conditions for survival in the post-fire areas. Compared with the other areas, in the NRAT area, there were better stand and soil properties and more features conducive to epigeic entomofaunal occurre 展开更多
关键词 Stand treatment strategy Forest regeneration Enzyme activity Soil organic carbon Epigeic beetle assemblage structure
在线阅读 下载PDF
Effects of Predators on the Belowground Life Stages (Prepupae and Pupae) of the Western Flower Thrips, <i>Frankliniella occidentalis</i>(Thripidae: Thysanoptera): A Review 认领
11
作者 Raymond A. Cloyd 《昆虫学(英文)》 2019年第4期71-80,共10页
Western flower thrips, Frankliniella occidentalis, is a major cosmopolitan insect pest causing direct and indirect damage to greenhouse-grown horticultural crops. The primary way of managing western flower thrips popu... Western flower thrips, Frankliniella occidentalis, is a major cosmopolitan insect pest causing direct and indirect damage to greenhouse-grown horticultural crops. The primary way of managing western flower thrips populations is by routinely applying insecticides, which target the aboveground life stages: larvae and adult. However, insecticides are minimally effective against the pupal stages (prepupae and pupae) that reside in the growing medium or soil. Therefore, soil-dwelling biological control agents including: predatory mites [Stratiolaelaps scimitus and Hypoaspis = (Geolaelaps) aculeifer], and a rove beetle, Dalotia coriaria may be a viable option to induce mortality on the pupal stages. These predators will feed on the pupal stages of the western flower thrips and can provide mortality on a life stage that is tolerant of insecticide applications. However, these biological control agents need to be used in conjunction with other plant protection strategies, such as insecticides and/or biological control agents that target the aboveground life stages (larvae and adult) to effectively manage western flower thrips populations in greenhouse production systems. 展开更多
关键词 Predatory Mites Rove Beetle Growing Medium Biological Control Predation
在线阅读 免费下载
Beetle elytron plate and the synergistic mechanism of a trabecular-honeycomb core structure 认领
12
作者 CHEN JinXiang ZHANG XiaoMing +2 位作者 OKABE Yoji XIE Juan XU MengYe 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2019年第1期87-93,共7页
For the development of lightweight biomimetic materials, the compressive properties of the beetle elytron plate(BEP, a type of biomimetic sandwich plate inspired from beetle elytra) and the underlying mechanism thereo... For the development of lightweight biomimetic materials, the compressive properties of the beetle elytron plate(BEP, a type of biomimetic sandwich plate inspired from beetle elytra) and the underlying mechanism thereof were investigated. With the following results:(1) The shared mechanism of trabeculae was revealed by using structural analysis. It is further predicted that a BEP with hollow trabeculae should possess enhanced compressive properties.(2) When the trabecular number(N) in a hexagonal unit of the honeycomb is less than three, the compressive strength of the BEP is rapidly increased with the increment of N. When N is over four, the deformation capacity is significantly improved because of the arising of S-type buckling deformation in the core structure of the BEP. Furthermore, the definition of the BEP is proposed combined with the biological structure of the beetle elytra.(3) When N=6 and the external diameter of trabeculae is equal to the length of honeycomb walls, the synergistic mechanism between the trabeculae and the honeycomb walls in BEPs is fully exerted. Namely, the trabecula restricts the deformation of the honeycomb walls;in turn, the honeycomb walls provide lateral support for the trabecula. This mechanism leads the core in the BEP to generate an S-type global buckling deformation producing the best compressive properties. The results will greatly impact the biomimetic field of beetle elytra and many industries in which honeycomb structure also serves as a key component. 展开更多
关键词 BEETLE ELYTRA BEETLE elytron PLATE SANDWICH structure biomimetic material compressive property
Photosynthetic traits and antioxidative defense responses of Pinus yunnanensis after joint attack by bark beetles Tomicus yunnanensis and T.minor 认领
13
作者 Juan Liu Hang Chen +3 位作者 Jianmin Wang Xiaoming Chen Zixiang Yang Junsheng Liang 《林业研究:英文版》 SCIE CAS CSCD 2019年第6期2031-2038,共8页
Bark beetles Tomicus yunnanensis and T.minor are two important pests of Pinus yunnanensis and can cause massive death of pine trees.In this study,we examined several traits related to photosynthesis in P.yunnanensis a... Bark beetles Tomicus yunnanensis and T.minor are two important pests of Pinus yunnanensis and can cause massive death of pine trees.In this study,we examined several traits related to photosynthesis in P.yunnanensis and their relationship with antibiotic defense responses after joint attack by the two bark beetles at the shoot and the trunk stages.When shoots were attacked by the beetles,the abundance of chlorophylls,carotenoids,and the rates of net photosynthesis(Pn)and transpiration(E)decreased in needles,while the levels of superoxide dismutase and malondialdehyde remained unchanged in both needles and phloem.The activity of peroxidases also remained unchanged in needles,but increased in phloem.The activity of catalases increased in both needles and phloem.When trunks were attacked by the bark beetles,chlorophyll abundance,Pn,E,and antioxidative enzyme activities all declined,and the declines were more pronounced than in the attacked shoots.A decrease in protein concentrations was also observed in needles and phloem from the attacked pines.Attack on shoots by the bark beetles suppressed host defense and provided a favorable environment for larval growth and development,resulting in long-term decline of pine growth potential.The results suggest that attacks on trunks by beetles caused more severe damage to host trees than attacks on shoots. 展开更多
关键词 Antioxidant enzymes BARK BEETLE Defense responses Photosynthesis PINUS yunnanensis Tomicus MINOR Tomicus yunnanensis
在线阅读 下载PDF
贺兰山甲虫物种丰富度分布格局及其环境解释 认领
14
作者 杨贵军 王敏 +2 位作者 杨益春 李欣芸 王新谱 《生物多样性》 CAS CSCD 北大核心 2019年第12期1309-1319,共11页
理解山地物种丰富度分布格局及其成因对于山地生物多样性保护具有重要意义。本文基于贺兰山地区甲虫31科252属469种的分布信息,结合相关气候与生境异质性数据,系统地探讨了贺兰山地区甲虫及6个优势科物种丰富度地理格局及其影响因素。... 理解山地物种丰富度分布格局及其成因对于山地生物多样性保护具有重要意义。本文基于贺兰山地区甲虫31科252属469种的分布信息,结合相关气候与生境异质性数据,系统地探讨了贺兰山地区甲虫及6个优势科物种丰富度地理格局及其影响因素。结果表明,甲虫物种丰富度及科属区系分化强度以贺兰山中段最高,南段比北段高,西坡比东坡高。基于183个栅格内物种分布的二元数据聚类分析,贺兰山甲虫分布可分为北段强旱生景观甲虫地理群、中西段半湿生景观甲虫地理群、中东段及南段半旱生景观甲虫地理群3个地理群。冗余分析(RDA)表明年均温和年均降水量是影响最显著的因子。方差分解结果显示,水分与能量因子共同解释了全部甲虫物种丰富度57.1%的空间变异,单独解释率分别为5.9%和7.1%。生境异质性解释了全部甲虫物种丰富度35.2%的变异,单独解释率仅为1.8%。气候因素与生境异质性对不同优势科物种丰富度的相对影响并不一致。在贺兰山的南段和北段,生境异质性和水分因子对甲虫物种丰富度影响作用明显。水分和能量因子是贺兰山地区甲虫物种丰富度空间分布格局的主导因子,生境异质性有助于提高甲虫物种丰富度。从未解释的比例来分析,地形和土壤因素可能对贺兰山甲虫物种丰富度存在重要影响。 展开更多
关键词 甲虫 物种丰富度 分布格局 水分 能量 生境异质性 贺兰山
Vitellogenin expression in the oilseed rape pest Meligethes aeneus 认领
15
作者 Caroline Kaiser Christina Lazaridou +2 位作者 Karl-Martin Vagn Jen sen Rodrigo Labouriau Michael Kristenseni 《昆虫科学:英文版》 SCIE CAS CSCD 2019年第2期274-282,共9页
When investigating insecticide resistance of pest insects, for example, the pollen beetle Meligethes aeneus, it is relevant to differentiate toxicological and molecular genetic data between male and female specimens. ... When investigating insecticide resistance of pest insects, for example, the pollen beetle Meligethes aeneus, it is relevant to differentiate toxicological and molecular genetic data between male and female specimens. A molecular sex determination method would allow resistance testing to be run without prior sorting of the samples. A one-step quantitative RT-PCR method for quantification of the yolk protein vitellogenin expression in the pollen beetle was established. The expression level of vitellogenin relative to tubulin was determined. Pollen beetles were tested at different time points during their development to determine if vitellogenin is a reliable molecular marker for detection of sexually mature females. The differentiation between females and males by relative expression of vitellogenin to tubulin is conditional regarding the life cycle. Sexually mature females and males could easily be distinguished, whereas immature specimens could not be seperated. Vitellogenin expression is a successful marker for identification of sexually mature pollen beetles. Females from the spring populations showed vitellogenin expression when the temperature was above 10.2°C. Further, detailed observations of vitellogenin throughout the spring indicated a strong relationship between daily temperatures and vitellogenin expression, which is an indicator of oviposition ability. 展开更多
关键词 Brassicogethes aeneus egg YOLK protein gene EXPRESSION OILSEED rape OVIPOSITION pollen BEETLE qRT-PCR
Occurrence of European Rhinoceros Beetle, <i>Oryctes nasicornis</i>(L.) (Coleoptera: Scarabaeidae), in the Southern Highlands of Tanzania 认领
16
作者 Nicodemus D. Matojo 《昆虫学(英文)》 2018年第1期9-13,共5页
The European rhinoceros beetle, Oryctes nasicornis (L.), is a large flying beetle in the subfamily Dynastinae of family Scarabaeidae and order Coleoptera. It is well-known to be a Palaearctic species, inhabiting Europ... The European rhinoceros beetle, Oryctes nasicornis (L.), is a large flying beetle in the subfamily Dynastinae of family Scarabaeidae and order Coleoptera. It is well-known to be a Palaearctic species, inhabiting Europe and Asia up to North Africa, with no reported material from the Sub-Saharan African region including Tanzania. The present work reports an occurrence of O. nasicornis in Tanzania specifically in Iringa region in the Southern Highlands zone of the country. The report is accompanied by description of the key morphological characters of the insect validating its diagnosis. The findings facilitate a basis for intervention of the existing records about O. nasicornis, including its biogeographical affiliation and the related undertakings. It is most likely that the species also ranges in other localities in Tanzania and the Sub-Saharan Africa region in general because of the existing proximity and interactions. 展开更多
关键词 COLEOPTERA Dynastinae Oryctes nasicornis PALAEARCTIC Species RHINOCEROS BEETLE SCARABAEIDAE
在线阅读 免费下载
Occurrence of Carabid Beetles in the Phenological Stages of Weedy Plants 认领
17
作者 Francisco J. Cividanes Terezinha M. dos Santos-Cividanes Alex A. Ribeiro 《昆虫学(英文)》 2018年第2期176-188,共13页
In the current study, we investigated the relationship between the abundance of carabid species (Coleoptera: Carabidae) and the phenological stages of weedy plants growing in edge habitats. A survey of carabid beetles... In the current study, we investigated the relationship between the abundance of carabid species (Coleoptera: Carabidae) and the phenological stages of weedy plants growing in edge habitats. A survey of carabid beetles was conducted in edge habitats between forest fragments and soybean/corn crops or orange orchards in five sites located in northeastern S?o Paulo state, Brazil, from November 2005 to May 2008. Beetles were captured with pitfall traps, and multiple regression analysis was used to determine the carabid species that prevailed on each of the phenological stages of weeds. In total, 1115 individuals, representing 26 genera and 52 species, were captured. Selenophorus species, mainly Selenophorus seriatoporus Putzeys, Selenophorus sp.4, Helluomorphoides squiresi (Chaudoir), Tetragonoderus laevigatus Chaudoir, Athrostictus sp.1 were abundant during the reproductive phenological stages of weedy plants, which suggests that these carabid species might prefer to feed on the seeds of weedy plants. 展开更多
关键词 ABUNDANCE Ground BEETLE PHENOLOGY SEED Consumption WEED
在线阅读 免费下载
河北省五岳寨国家森林公园甲虫物种多样性 认领
18
作者 张嘉 任国栋 +1 位作者 牛亚燕 杜永刚 《河北林业科技》 2018年第3期39-43,共5页
2016 年 5-8 月对五岳寨国家森林公园甲虫物种多样性进行了调查, 共获得 1828 头标本, 经鉴定隶属于 40 科 194属 271 种.在物种数量方面, 叶甲科种数最多, 共 35 种 (12.92%), 其次为步甲科共 31 种 (11.44%) 和天牛科共 23 种 (8... 2016 年 5-8 月对五岳寨国家森林公园甲虫物种多样性进行了调查, 共获得 1828 头标本, 经鉴定隶属于 40 科 194属 271 种.在物种数量方面, 叶甲科种数最多, 共 35 种 (12.92%), 其次为步甲科共 31 种 (11.44%) 和天牛科共 23 种 (8.49%);在物种个体数量上, 瓢虫科个数最多, 共 376 个 (20.57%), 其次为叶甲科共 365 个 (19.97%) 和步甲科共 150 个 (8.21%).全年优势种为异色瓢虫 (Harmonia axyridis) .采用 倩-多样性测度方法对不同月份和海拔进行分析得出: 不同月份的多样性指数由高到低依次为 7 月跃8 月跃6 月跃5 月, 且多样性指数与均匀度指数保持-致, 表明该地区甲虫生态群落较稳定; 1000-1500m 的物种多样性指数最高.由于种类较少, 不同海拔的多样性指数与均匀度指数走势表现为不相关. 展开更多
关键词 甲虫 物种多样性 五岳寨 河北省
在线阅读 免费下载
保时捷创始人费迪南德·波尔舍的汽车人生 认领
19
作者 张腾 吴卫 《艺术与设计:理论版》 2018年第11期94-96,共3页
文章通过回顾20世纪上半叶欧洲汽车工业的发展脉络,简要介绍了费迪南德·波尔舍的学习、工作和汽车设计的经历,目的是探讨波尔舍光辉的汽车人生;波尔舍父子创立了属于自己的汽车企业品牌保时捷公司,为了实现让平民百姓都能享受汽车... 文章通过回顾20世纪上半叶欧洲汽车工业的发展脉络,简要介绍了费迪南德·波尔舍的学习、工作和汽车设计的经历,目的是探讨波尔舍光辉的汽车人生;波尔舍父子创立了属于自己的汽车企业品牌保时捷公司,为了实现让平民百姓都能享受汽车的福利,他设计并研发了平民车型甲壳虫汽车,在波尔舍生命的最后4年里,波尔舍父子又成功地完成了保时捷356汽车的设计和研发工作;波尔舍最大的成就是建立保时捷汽车公司和大众汽车公司,他的后代波尔舍家族以及皮耶希家族至今仍然是保时捷和大众两大公司的执掌大权的人。 展开更多
关键词 保时捷公司 波尔舍 甲壳虫汽车 保时捷356
Patterns of biomass,carbon,and nitrogen storage distribution dynamics after the invasion of pine forests by Bursaphelenchus xylophilus(Nematoda:Aphelenchoididae)in the three Gorges Reservoir Region 认领
20
作者 Ruihe Gao Youqing Luo +2 位作者 Zhuang Wang Hanjun Yu Juan Shi 《林业研究:英文版》 SCIE CAS CSCD 2018年第2期453-464,共12页
Masson pine stands infected by Pine wilt disease(PWD)in the Three Gorges Reservoir Region of central China were surveyed to quantify the immediate responses and subsequent trajectories of biomass,carbon(C),and nitroge... Masson pine stands infected by Pine wilt disease(PWD)in the Three Gorges Reservoir Region of central China were surveyed to quantify the immediate responses and subsequent trajectories of biomass,carbon(C),and nitrogen(N)in stand-level major ecosystem compartments.The biomasses of above-and belowground tree components,as well as of the understory,forest floor,and mineral soil(0–40 cm),were determined within each stand.C and N storage were also estimated for each ecosystem compartment.Overstory biomass decreased steadily with the extent of PWD infection.Understory biomass ranged from 1.97 to 4.16 Mg ha-1,and the observed value for forest floor biomass was 12.89–22.59 Mg ha-1.The highest mean C and N concentrations were found in the stem bark and needles of Masson pine,respectively,while the lowest were found in the semi-to fully decomposed layer of the forest floor and stem wood of Masson pine,respectively.The C and N storage of aboveground trees,tree roots,and the aboveground ecosystem decreased with the extent of PWD infection.However,the C and N contents of the understory,forest floor,and total mineral soil initially declined after PWD infection before recovering over the following several years.Those result concluded that the biomass,C,and N storage of different forest ecosystem compartments have experienced certain variations following the PWD epidemic.This is vital to understand the shifts in stand-level C and N allocation in PWD-damaged forest stands,as well as for predicting the responses of regional and global C and N cycling. 展开更多
关键词 CARBON Insect outbreak MASSON PINE Nitrogen PINE sawyer beetle PINE WILT disease
在线阅读 下载PDF
上一页 1 2 48 下一页 到第
使用帮助 返回顶部 意见反馈