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生态位分化     
相关语句
  niche differentiation
     The distribution ratio of net primary productivity in various organs is the synthetical reflection of the community structure and function in interspecific relationship, niche differentiation and population dynamics.
     净第一性生产力在各器官中的分配比例是植物群落结构与功能在种间关系、生态位分化和种群动态特征上的综合反映。
短句来源
     The second part discusses about "principle of competition exclusion" of the enterprises and enterprises' ecological niche differentiation.
     第二部分对企业竞争排斥法则和企业的生态位分化进行讨论;
短句来源
     The niche differentiation of 7 main species in oasis-desert ecotone in Fukang of Xinjiang was analyzed quantitatively with respect to community gradients and single ecological factor gradients, i.e. soil moisture, soil salinity and soil acidity, by Levins formula and the method by Wang gang.
     采用 Levins公式和王刚生态位重叠计测方法 ,对新疆阜康绿洲荒漠过渡带中的 7个植物种 ,分别从群落梯度和 3个单一生态因子 (土壤水分维 ,土壤盐分维 ,土壤酸碱度维 )上对其生态位分化进行了定量分析。
短句来源
     In the light of "principle of competition exclusion" of the enterprises, the author points out that in order to survive and develop in the new situation, our enterprises must perform enterprises' ecological niche differentiation and raise the core competition.
     根据企业竞争排斥法则,作者指出我国企业在新形势下求得生存和发展的根本途径是打造企业核心竞争力,实行企业生态位分化
短句来源
     Niche differentiation is evident from the non-random spatial distributions along micro-environmental gradients and plays an important role in sustaining high biodiversity.
     热带森林植物沿微环境梯度的非随机空间分布表明其生态位分化很明显,并对其多样性起重要作用。
短句来源
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  ecological niche differentiation
     Spider Species and Their Ecological Niche Differentiation in Watery and Water-logging Paddy Fields
     涝渍地稻田蜘蛛种类及其生态位分化
短句来源
     In the light of "principle of competition exclusion" of the enterprises, the author points out that in order to survive and develop in the new situation, our enterprises must perform enterprises' ecological niche differentiation and raise the core competition.
     根据企业竞争排斥法则,作者指出我国企业在新形势下求得生存和发展的根本途径是打造企业核心竞争力,实行企业生态位分化
短句来源
     The second part discusses about "principle of competition exclusion" of the enterprises and enterprises' ecological niche differentiation.
     第二部分对企业竞争排斥法则和企业的生态位分化进行讨论;
短句来源
  niche separation
     Analysis of the Small-and Medium-sized Enterprises Development Strategy Based on the Niche Separation Theory
     基于生态位分化理论的中小企业发展战略分析
短句来源
  “生态位分化”译为未确定词的双语例句
     In the wetland habitat, however, L individuals showed a relatively higher potential of clonal growth than M (16.20 ramets vs. 10.17 ramets, t=4.788, p<0.001).
     但在岸边泥地上固着生长时,2004年L个体平均克隆分株为16.20,M为10.17个分株。 L表现出了更强的克隆生长能力(t=4.788,p<0.001),与漂浮生长状况下的情形恰恰相反,暗示M与L个体可能存在一定的生态位分化
短句来源
     The level of temporal niche overlap in spring and autumn was low while in summer it was high.
     同样,生态位重叠和生态位分化随着不同生态季节的变化也会发生明显的改变,春、秋季的生态位重叠程度低,分化程度高,秋季较春季略强;
短句来源
     Among the 19,there are only 7 pairs that has niche overlapping indices over 0.2,15 over 0.1,which indicatd a higher niche polarization of dominant populations and a weaker competition in forest community in Taiyue Mountains,Shanxi.
     19个优势种群之间的生态位重叠指数大于 0 .2的只有 7个种对 ,大于 0 .1的共有 15个种对 ,可见太岳山森林群落优势种群的生态位分化程度较高 ,种间的竞争关系较弱
短句来源
     The niches of ten main species in outer space of Karamay Agricultural Comprehensive Developmental Region are analyzed quantitatively with respect to community gradients and three single environmental factors, i.e. soil moisture, soil salinity and soil acidity, by Shannon-Wiener index and Pianka method.
     采用Shannon-Wiener指数和Pianka测度方法,分别从群落梯度和3个单一环境因子(土壤水分、盐分、酸碱度)对构成克拉玛依农业综合开发区外围荒漠植被的10个主要植物种的生态位分化进行了定量分析。
短句来源
     The results show the niche breadths of Leymus chinensis,which were greater than other species,were 0.910,0.869 and 0.930 on the gradients of soil water,soil salt and soil organic respectively.
     结果表明,植物种群长期适应由放牧引起的群落和土壤环境因子梯度变化是种群生态位分化的主要原因。 优势种羊草种群生态位宽度最大,三维上生态位宽度分别为0.910、0.869和0.930。
短句来源
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  niche differentiation
Therefore, their distinct defensive behaviors contribute to their niche differentiation.
      
While a range of morphological differences that lead to differentiation in animals' mechanical access to food have been identified, the role of sensory differences in within-guild niche differentiation has received less attention.
      
The diets of the two species differed significantly, reflecting their different prey perception techniques and thereby supporting the hypothesis that differences in sensory ecology contribute to niche differentiation.
      
Niche differentiation with respect to light utilization among coexisting dwarf shrubs in a subarctic woodland
      
On testing temporal niche differentiation in carabid beetles
      
更多          
  ecological niche differentiation
Maternal or paternal inheritance of wax characters in Rosa, section Caninae may allow for ecological niche differentiation according to the parental evolutionary constraints.
      
  niche separation
Niche separation of closely related taxa has been examined in detail and it has been shown that there is often a gradient of hydrological preference within each taxon.
      
Temperature as a Factor of Niche Separation in Free-Living Mesostigmatid Mites (Mesostigmata: Arachida, Parasitiformes) of Storm
      
The role of temperature as a factor of ecological niche separation in saprophytic Mesostigmata and formation of polydominant mite communities in the algal belts were demonstrated.
      
A niche separation by partial depth segregation of the species has been observed.
      
It is concluded that, even within a tropically similar group of animals (raspers in this case) relevant dimensions of niche separation depend upon the structure of the environment as well as upon the structure of the animals themselves.
      
更多          
  segregation of ecological niches
The role of behavioral polymorphism in the process of intrapopulation segregation of ecological niches in bream, Abramis brama (
      


The forest dominated by Cyclobalanopsis glauca is one of the main types of the subtropical evergreen broad-leaved forests in China, The studies on the primary productivity of the community have been completed with harvesting method. In this paper, a group of optimized regression biomass models for the tree and subtree layer were reported. The models were also analysed, examined and evaluated. The results showed that there is an allometric growth relationship among the organ variables. It is essential to establish...

The forest dominated by Cyclobalanopsis glauca is one of the main types of the subtropical evergreen broad-leaved forests in China, The studies on the primary productivity of the community have been completed with harvesting method. In this paper, a group of optimized regression biomass models for the tree and subtree layer were reported. The models were also analysed, examined and evaluated. The results showed that there is an allometric growth relationship among the organ variables. It is essential to establish various optimized biomass models using the regression analysis method on the basis of various layers, species and variables. The models are relatively of high accuracy and can effectively predict the biomass of the community. The effective combination of the interspecific models are suitable for subtrees and companion trees. The model differences among species are closely related to their states and function in the community. The distribution ratio of net primary productivity in various organs is the synthetical reflection of the community structure and function in interspecific relationship, niche differentiation and population dynamics.

笔者用收获法对浙江建德山区的天然次生青冈常绿阔叶林群落的第一性生产力进行了研究。本文报道了林木层样木的生物量优化回归模型,并对模型进行了分析、检验和估算。结果表明,立木各器官变量之间存在着很好的相对生长关系;进行分层次、种类(组分)和自变量的模型选优是十分必要的;各种模型都有较高的精度,可以对该群落的生物量作出有效的估计;种间模型的有效组合适用于亚乔木层的种类和乔木层的伴生种类;种类(组分)间的模型差异与它们在群落中所处的地位或所起作用密切相关;净第一性生产力在各器官中的分配比例是植物群落结构与功能在种间关系、生态位分化和种群动态特征上的综合反映。

The interrelationship between community structure of nekton and its spatiotemporal patterns of heterogeneity was examined by exploiting the data collected from a series of comprehensive ecological investigations along Liaodong Bay (Liaoning) to the estuary of Changjiang(Yangtze River)within 20 isobath from 1980 to 1985. It was inscribed that there were 185 nekton in the community, including 177 fishes and & cephalopoda, taking up 52. 23% of the total species impregnated in the whole Yellow Sea and Bobai Sea,...

The interrelationship between community structure of nekton and its spatiotemporal patterns of heterogeneity was examined by exploiting the data collected from a series of comprehensive ecological investigations along Liaodong Bay (Liaoning) to the estuary of Changjiang(Yangtze River)within 20 isobath from 1980 to 1985. It was inscribed that there were 185 nekton in the community, including 177 fishes and & cephalopoda, taking up 52. 23% of the total species impregnated in the whole Yellow Sea and Bobai Sea, which could be associated concurrently in three faunistic components: warm water (WW), warm temperate (WT) and cold temperate (CT),diversified into different ecological components, such as occasionals,seasonals and regulars. The rates dominated by 31 regulars of the WT in the NED(Ecological Density in Number) and BED (Ecological Density in Biomass) were 68. 86% and 65. 59%, respectively. Meanwhile, 34 occasionals of the WW were only accounted for 0. 10% and 0. 19% of the community composition. Systematic clustering for time-series around the year was adopted to depict the temporal variability of the dominant assemblage. It revealed two distinctive groups: one is warm- seasoned group, mainly resulted from the data of the BED in the period from May to September,the other based on the NED between October and April. And,each of them was characterized by a significant relationship of alternate utilization of coastal waters as breeding or nursery grounds by different faunistic components,and spatially heterogeneous changes in the oceanographic factors such as circulation and warm or cold mass. In accordance with the integrated analysis of the spatiotemporal structure of the nekton community in the coastal regimes, it appeared remarkable that there was a tendency of miniaturization to structuralizing the community, dominated by low-quality and small-sized clupeid, such as anchovies, Setipinna taty (C. et V.), japanese anchovy, Engraulis japonicus Schlegel, and gizzard-shad,Clupanodon punctatus (Schlegel), scaled sardine,Sardinslla zunasi Bleeker, and red-nosed anchovy,Thrissa kammalensis (Bleeker). The total took up 50. 45 % and 34. 41 of the NED and BED, respectively. Contrary to the increase of ecological components of these smaller fishes in the community,the traditional commercial fisheries resources,such as little yellow croaker, Pseudosciaena polyactis Bleeker, large yellow croaker, Pseudosciaena crocea (Richardson),chinese herring, Ilisha elongata (Bennett)and hairtail, Trichiurus japonicus T. et S.,made up 24. 43% of the catch quota in the whole Yellow Sea and Bobal Sea in 50's. At present, the catch of these species was dramatically declined to 6. 20% in 80's,which is concordant with the analysis of the community structure at the ratio of 2. 65 % and 3.18% of the hairtail and little yellow croaker in the NED and BED,respectively. The reason that led to shifting of ecological niche is substantially attributed to the speedy expansion in fishing effort over the target species in breeding and nursery grounds,which resulted in the decrease of both parent stocks and juveniles of nekton. Judged by the requirement of conservation of marine biodiversity,it is an urgent task to implement a systematic program on conduction of long term monitoring of ecosystem in the coastal waters.

依1980年至1985年搜集的系统生态学资料分析,黄渤海沿岸水域游泳动物群落由185种动物(177种鱼类和8种头足类)组成。兼有暖水性、暖温性和冷温性的复合区系,以及偶见种、季节种和习见种的多重生态学成分。以暖温性习见种占群落优势地位,其NED和BED分别占68.86%和65.59%,暖水性偶见种仅占0.10%和0.19%。群落结构的季节变化可归结为依BED聚合成暖季组(5-9月)和依NED聚合为冷季组(10-4月)两种型式,对应于物种间交替利用沿岸水域进行繁殖和索饵活动等生态学过程。群落空间分布格局聚类分析结果表明,渤海区和黄海南部地理隔离,然生物成分的区系组成相似性较高。黄海北部则受季节性生态环境异质性影响,形成纬向梯度栖息地生态位分化与重叠,表现出群落时空尺度上的可塑性特征。

icroscopic examination of crop contents was used to determine the food preference of grasshoppers on typical steppe in Inner Mongolia. Results from the dietary analysis of 11 grasshopper species (Table 1) showed that 31 species of vascularplants, a species of fungus and mites were served as food sources (Table 3). Theoverlaps and breadths of trophic niches among these grasshopper species were studiedby methods of popular indices (Table 2 & 4). On the basis of partition in utilization of food resources, the...

icroscopic examination of crop contents was used to determine the food preference of grasshoppers on typical steppe in Inner Mongolia. Results from the dietary analysis of 11 grasshopper species (Table 1) showed that 31 species of vascularplants, a species of fungus and mites were served as food sources (Table 3). Theoverlaps and breadths of trophic niches among these grasshopper species were studiedby methods of popular indices (Table 2 & 4). On the basis of partition in utilization of food resources, the 11 grasshopper species were divided into 5 groups by thePrincipal Component Analysis: graminivorous, mixed graminivorous, mixed forbivorous, forbivorous and phytocarnivorous species (Fig. 1 ). The authors proposed anew concept and methods for measurement of potential and realized serious valuesof grasshopper species by combining average biomass of individual and realized biomass of population of grasshopper with their plant value indices. The concept andmethods are very useful for the evaluation of economic importance of the grasshopper species in this region. The coexisted relationships among these grasshopperspecies within the ecosystem of typical steppe are discussed.

本文采用嗉囊内含物显微分析技术系统地研究了内蒙古典型草原蝗虫的选食特性和食物利用谱.根据11种蝗虫嗉囊内含物分析的结果,定量地研究了蝗虫的营养生态们以及生态位的重叠和宽度。11种蝗虫依据生态位分化的特点,被划分为5个不同的营养需求类群:禾革取食者、禾草-杂草取食者、杂草-禾草取食者、杂草取食者和杂食者。作者通过对蝗虫食性及生物量的研究,提出了蝗虫潜在严重值和实际严重值的概念和计算方法,也就蝗虫在草原生态系统中的相互作用关系及共存关系进行了讨论。

 
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