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niche overlap
相关语句
  生态位重叠
     The niche breadth and niche overlap of main populations on the gradients of soil water, soil pH value, and soil total nitrogen content were measured with the formulas described by Shannon-Wiener and Pianka.
     运用以Shannon-Wieren指数为基础的生态位宽度计测公式和Pianka的生态位重叠计测公式,在土壤水分、土壤pH值、土壤全氮含量3个资源维上研究白羊草灌丛草地主要植物种群生态位宽度和生态位重叠关系。
短句来源
     In this paper,the niche breadth and niche overlay of 12 dominant species were studied,using the methods of Levins and ShannonWiener indexes of niche breadth and Pianka index of niche overlap.
     应用Levins和Shannon-Wiener生态位宽度指数及Pianka生态位重叠指数,研究了太白红杉群落12个优势种的生态位宽度和生态位重叠.
短句来源
     The results reveal that the niche breadth and the niche overlap reflects the species distribution,the quantity characters and the species ability to utilize the environmental resource.
     研究表明,物种生态宽度、物种之间的生态位重叠值与物种的分布与数量密切相关,反映了大型底栖动物群落中各物种对生境资源的利用能力的强弱。
短句来源
     The 16 constructive populations of the south slope form 240 species counterparts,among which 100,that's 41.9% of the total,have niche overlaps,indicating that there exits niche overlap among the 16 species of the south slope.
     南坡16个建群种群构成的240个种对中有100个种对表现出生态位重叠,占整个种对的41.9%,表明恒山南坡16个种群间具有比较显著的生态位重叠
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;
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  生态位重叠度
     Food niche breadth was 7.26 for adults and 6.69 for juveniles. Food niche overlap between adults and juveniles was 0.59. Males were the larger sex in E.
     成体和幼体的食物生态位宽度分别为 7.2 6和 6.69,成体和幼体的食物生态位重叠度为 0 .59。
短句来源
     Based on the analysis of niche overlap and niche intensity, the new definition of competitor is given.
     本文在详细阐述企业生态位重叠度和企业生态位强度的基础上,重新界定了企业竞争者的内涵。
短句来源
     Time niche breadth and niche overlap of spiders were large, synchronized with insect pests of vegetable, which indicated that the spiders had a great control effect on insect pest in vegetable fields .
     菜田蜘蛛的时间生态位宽度和生态位重叠度较大 ,与菜田害虫在时间上具有同步性 ,表明菜田蜘蛛对菜田害虫具有较强的控制作用。
短句来源
     The ecological characteristics of natural forest are affected by niche breadth,niche proportional similarity and niche overlap.
     植物种群的生态位宽度与种群之间的生态位相似性比例及生态位重叠度反映了森林的更新生态特征。
短句来源
     chaochiaoensis with stage Ⅰ and Ⅱ of R. catesbeiana,food niche overlap indexes were 0.6952 and 0.6887; biomass of unit body weight (food biomass/average weight) were 10.96 times and 15.48 times of two stages of R.
     昭觉林蛙蝌蚪Ⅱ期与牛蛙蝌蚪Ⅰ、Ⅱ期的食物生态位重叠度分别为 0 6 95 2和 0 6 887,单位体重摄食的生物量分别是后两者的 10 96倍和 15 4 8倍 ,但百分率相似性指数并不高 (分别为 5 4 95 %和 5 8 11% )。
短句来源
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  生态位重迭
     ON THE MEASUREMENT OF NICHE OVERLAP IN PLANT COMMUNITIES
     植物群落中生态位重迭的计测
短句来源
  “niche overlap”译为未确定词的双语例句
     The results show that the temporal niche breadth value of Pardosa astrigera(0.9218) is maximum, that of Dictyna arundinacea (0. 9176) is the second, and the temporal niche overlap values of Misumenops tri-cuspidatus and Chiracanthium japonicum (0. 8083) are maximum.
     研究结果表明时间生态位宽度值为星豹蛛(Pardosa astrigera,PAR)最大(0.9218),其次为芦苇卷叶蛛(Dictyna arundinacea,DIC)(0.9176),重叠值为三突花蛛(Misumenops tri-cuspidatus,MIS)和彭妮红螯蛛(Chiracanthium japonicum,CHI)最大(0.8083)。
短句来源
     The species niche breadth and niche overlap were then calculated. The result shows that Oplismenus compositus (0. 68), Cyrtococcum patens, (0. 41),Cymbopogon caesius(0. 42) ,Panicum longifolium(0. 40) have bigger niche breadth as compared with other species.
     结果表明生态位较宽的为竹叶草Oplismenus compositus(0.68)、弓果黍Cvrtococcum patens(0.41)、白茅Cymbopogon caesius(0.42)、双穗雀稗Panicum longifolium(0.40);
短句来源
     The horizontal spatial niche breadth value of Neoscona doenitzi (0.4307) is minimum, and others are focused between 0.8814 - 0.9912, and their horizontal spatial niche overlap values are focused between 0. 7200 - 0. 9500. The vertical spatial niche breadth value of Erigondium gramincola (0.7998) is maximum and the vertical spatial niche overlap values of Erigondium gramincola and Achaearanea tepidario-rum (0.7600) are maximum.
     水平生态位宽度值除黄褐新圆蛛(Neoscona doenitzi,NEO)最小(0.4307)外,其余集中在0.8814~0.9912间,重叠值多数集中在0.7200~0.9500间。 垂直生态位宽度值为草间小黑蛛(Erigondium gramincola,ERI)最大(0.7998),重叠值为草间小黑蛛和温室球腹蛛(Achaearanea tepidariorum,ACH)最大(0.7600)。
短句来源
     The patch indexes and niche breadths of the main species have been analysed on such axes as light,soil water and soil organic matter. The value of niche overlap between every two species is high on soil resource axis.
     在光照强度、土壤水分和土壤有机质三维资源轴上对物种资源选择性和生态位重叠的计测表明,多数种对在土壤有机质和土壤水分资源轴上重叠较大,同一资源轴上灌木种对间的重叠值较草本种对间的重叠值大。
短句来源
     The three-dimensional niche breadth value of Erigondium gramincola (0.7189) is maximum and the three-dimensional niche overlap values of Erigondium gramincola and Achaearanea tepidariorum (0.3716) , Chiracanthium japonicum and Dictyna arundinacea (0.3715), Erigondium gramincola and Chiracanthium japonicum (0.3695) are biggist.
     三维生态位宽度值为草间小黑蛛(0.7189)最大,重叠值较大为草间小黑蛛和温室球腹蛛(0.3716)、彭妮红螯蛛和芦苇卷叶蛛(0.3715)、草间小黑蛛和彭妮红螯蛛(0.3695)。
短句来源
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  niche overlap
The niche width, proportional similarity of niche and the niche overlap of dominant species of dying trees were computed.
      
Species within host trees vary from winter to summer and all the species have their own niche width, proportional similarity of niche and the niche overlap.
      
Dominance of Dremomys pernyi and Callosciurus erythraeus in small mammal communities, time niche breadth, and time niche overlap between the two small mammals were calculated, respectively.
      
Their spatial and temporal niches among the four disturbance types were assessed using the Shannon-Wiener niche breadth index and the Pianka niche overlap index.
      
The Pianka niche overlap indices of six-paired species were the highest and varied from 0.900 to 1.000, suggesting their spatial niche overlapped almost completely.
      
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Recently there have been quite a few discussions on the measure of niche overlap, and a number of different measure methods have been mads known. This note presents a measure method which integrates, comprises and extends all the above methods. This method may also be used for the measure of several similarties.

关于生态位重叠的度量最近有许多讨论,并且已有许多不同的度量方法。本文给出一种比较一般的度量方法,它统一、包括而且开拓了以往的各种度量方法。这一方法也可用于各种相似程度的度量。

The Coniferous forest community was surveyed and measured by Pointquar-ter and quadrat methods. Opening degree is defined as the sum of ratio of the distance from the point to the nearest coniferous forest irdividuals in each quadrat to their height. The relationship between opening degree and the undergrowths of the quadrat was analysed quantitatively.The community spatial pattern corresponds with its function in regulation ard compensation on use of sun light energy. It is found in our studies that the coniferous...

The Coniferous forest community was surveyed and measured by Pointquar-ter and quadrat methods. Opening degree is defined as the sum of ratio of the distance from the point to the nearest coniferous forest irdividuals in each quadrat to their height. The relationship between opening degree and the undergrowths of the quadrat was analysed quantitatively.The community spatial pattern corresponds with its function in regulation ard compensation on use of sun light energy. It is found in our studies that the coniferous seedlings appear only in high opening degree; Shannon-Wiener diversity index increases with the increase in opening degree and there is niche overlap of the different distributions of populations on the axis of light source. All this shows that the distribution of populations depends on the light levels.

采用点-四分法和样方法观测了青杄Picae wilsonii林群落。以样点到四象限最近青杄植株距离与各自个体高度的比值之和,定义为开敞度。以此作为林下光水平的参量,从而定量地分析了它与下层植物的关系。群落空间格局与在利用光能时的调节性和互补性的功能作用相对应。青杄幼苗仅在高开敞度下生长;Shannon-Wiener种多样性指数随开敞度而增加。各个种群在光资源轴上不同分布的生态位重叠指数等多方面研究,证明种群分布对光照水平差异的选择性。

In this paper, various definitions of niche are reviewed by using the theory of set and mapping, and a new niche definition containing both relationships between species and environmental factors and population dynamics models has been suggested. The mathematical expression of this definition is Ac En|→B E1, where A is set which expresses the attribute of environment and set B expresses the attribute of species.Niche overlap is defined as an ecological similarity between two species, and thereby the improved...

In this paper, various definitions of niche are reviewed by using the theory of set and mapping, and a new niche definition containing both relationships between species and environmental factors and population dynamics models has been suggested. The mathematical expression of this definition is Ac En|→B E1, where A is set which expresses the attribute of environment and set B expresses the attribute of species.Niche overlap is defined as an ecological similarity between two species, and thereby the improved formula for measuring niche overlap has been deduced. The Improved formula is compared with the formulas of similarity percentage, Levins' formula and Pianka's formula. Two advantages of the improved formula have been pointed out in the paper.

本文分析了有关生态位的种种定义,总结了它们之间本质上的共同点,并应用集合映射的理论,提出了一个既包括种与环境因子之间的关系,又包括种群动态模型的生态位定义。将生态位重叠定义为两个种在生态学上的相似性,继而推导出计测生态位重叠的改进公式。利用实例将改进公式与目前通用的相似百分数公式、Levins公式、Pianka公式等进行了比较,指出改进公式优于通用公式的两个特点,

 
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