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niche expansion
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  “niche expansion”译为未确定词的双语例句
     The results showed that:1) The niche breadths of most plant populations present on the control transect T_0 were relatively small, because, on the one hand the low resource availability of transect T_0 prevented niche expansion of plant populations, and on the other hand the populations growing in the relatively stable habitats of transect T_0 had accustomed to and had intensified selective utilization to a specific range of each kind of resource, which was considered niche specialization.
     结果表明,1)多数种群在T0样带上的生态位宽度较小,一方面是因为T0样带资源本身的有效性及可利用范围限制了植物种群的生态位扩展,另一方面T0样带相对稳定生境中的植物种群已经适应于某一特定范围的资源水平,即对这一指定范围的资源选择性利用增强,这是生态位趋于特化的表现;
短句来源
     There are eight main hypotheses about the selective factors on evolution of endothermy in animals,including Thermal Niche Expansion Model,Homeothermy and Metabolic Efficiency Model,Decreasing Body Size Model,Postural Change Model,Increasing Brain Size Model,Aerobic Capacity Model,Parental Care Model and Assimilation Capacity Model.
     内温性起源的选择因子包括 8个模型 :热生态位扩展模型、恒温与代谢效率模型、降低个体大小模型、姿势改变模型、增加脑大小模型、有氧呼吸能力模型、双亲行为模型和同化能力模型。
短句来源
     Niche expansion must be cause to biological evolution. It's more fit to generate offspring by "costae escarole" of niche.
     扩充必然导致生物进化,而生物扩充是由生物的生态位决定的,因此根据生态位的大小作为选择策略,产生下一代个体更符合自然进化法则。
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     The wider niche breadths of most plant populations on flooded transects compared to the control transect T_0 were the consequences of niche expansion of plant populations when subjected to disturbance, in order to increase survival opportunities in unstable habitats, known as niche generalisation.
     多数植物种群在受水淹干扰样带上生态位宽度比在对照样带上大,因为在受到干扰以后,植物种群往往要扩展其生态位空间,以增加在不稳定生境中的生存机会,这是生态位泛化的表现;
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     The tillers could be developed through forming lots of topmost buds and node buds of rhizome,and the clones achieved the spatial niche expansion and repetitive regeneration.
     赖草无性系以形成大量的根茎顶端芽和根茎节间芽发育成分蘖株 ,实现无性系空间生态位的扩展和持续更新
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  相似匹配句对
     Niche
     生态位
短句来源
     THE NICHE ECOSTATE-ECOROLE THEORY AND EXPANSION HYPOTHESIS
     生态位态势理论与扩充假说
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     It is characteristic of expansion.
     这种改造的特点是它的扩张性。
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     On the Earth expansion
     地球膨胀说提出、发展及其主要事实依据
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     (4) niche;
     ( 4 )龛影 ;
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  niche expansion
Apparently, individuals of a species, regardless of instar, simultaneously choose the same habitat, however, the preferred habitat may shift temporally due to change in resource availability, or niche expansion or compression due to competition.
      
This unique ability is probably the underlying factor in the evolutionary niche expansion of salmon sharks into boreal waters and in their ability to actively pursue and capture highly active prey such as salmon.
      
Niche expansion is seen as a consequence of diffusion in niche space, and an evolutionary version of the Volterra competition equations is proposed as a way to relate niche geometry with population dynamics.
      
We suggest that the observed niche expansion and behavioural variations are not suitable criteria for taxonomic status, a proposal in contrast to that of Sangster [Ibis 142:487-490 (2000)].
      
These behavioural changes result in a niche expansion into open habitats at lower altitudes.
      
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This paper reports on a survey (conducted during 1979, 1981-1982) of the birds and mammals on Dongtou Island and its adjacent mainland area, as well as on five islands of the Zhoushan Archipelago, Zhejiang Province.The survey shows that there are fewer species of animals on the islands than those on the mainland because of the separating effect of strait. For instance, a total of 16 species of birds and mammals were found on Dongtou Island during May-June 1979, while 51 species on the adjacent mainland area....

This paper reports on a survey (conducted during 1979, 1981-1982) of the birds and mammals on Dongtou Island and its adjacent mainland area, as well as on five islands of the Zhoushan Archipelago, Zhejiang Province.The survey shows that there are fewer species of animals on the islands than those on the mainland because of the separating effect of strait. For instance, a total of 16 species of birds and mammals were found on Dongtou Island during May-June 1979, while 51 species on the adjacent mainland area. However the population density on the former is higher than that on the latter The reason is that there are fewer competitors and fewer carnivores on the islands so that the population densities of some species of birds and mammals are quite high and the phenomena of 'niche expansion' occur. The survey also reveals that Passer montanus and Rattus rattoides are the dominant species on all the islands.Preston (1962) pointed out that the number of species on islands increases with island area, and suggested a formula for the relation as S=cAz. In our investigation of mammals on the five islands of the Zhoushan Archipelago a similar conclusion has been reached: S=2.12 A0.29. The density of mammals on these islands, however, tends to decrease with the extension of island area. In addition, the species number and population density of both birds and mammals are found to be closely related to the different types of vegetation on the islands.Over-hunting and destruction of habitats have led to the decrease or even to the extinction of some species of mammals on the islands. Therefore, some measures of protecting and developing the animal resources on the islands are suggested in the paper.

对浙江洞头岛及舟山五岛的鸟兽调查表明,海岛动物的种数较相邻大陆为低,但种群密度却高于大陆,岛上的某些种类出现生态位扩展的现象。舟山五岛兽类的种数和岛屿面积呈正相关,其关系式为S=2.12A~(0.29),但种群密度随着岛屿面积的增大而下降。文中据此提出了保护和发展岛屿动物资源的某些措施。

The niche ecostate-ecorole theory and niche expansion hypothesis were developed inthis paper. Each biological unit from individual to biosphere exits in a certain ecostate and hasits own ecorole in the environment. The "ecostate" of the biological unit is the accumiated re-sult of growth and development, learning, socio-economical development and the interactingwith surrounding environment in the past. The "ecorole" are the current effects on the envi-ronments, such as the rate of energy and matter exchange,...

The niche ecostate-ecorole theory and niche expansion hypothesis were developed inthis paper. Each biological unit from individual to biosphere exits in a certain ecostate and hasits own ecorole in the environment. The "ecostate" of the biological unit is the accumiated re-sult of growth and development, learning, socio-economical development and the interactingwith surrounding environment in the past. The "ecorole" are the current effects on the envi-ronments, such as the rate of energy and matter exchange, productivity, growth rate, eco-nomic development rate and expanding rate for new space etc.. The varying curve of ecostateof biological unit is typicaly shaped as "S", the varying curve of ecorole of biological unit shapedlike a kind of "normal curve". The niche of a biological unit is the percentages of its ecostateand ecorole to the total ecostate and ecorole of all concerned units in a certain ecosystem, whichreflected its relative importance and the function status. The increase of the ecostate and eco-role caused by the growth potential in a biological unit is called "niche expansion". Niche ex-pansion is the momentum of the development and evoluation of the biosphere and the instinctcharacteristics of a leaving system. The rneasurement methods for ecostate and ecorole weretested in seven examples. The speclal properties of human niche expansion was also discussedhere.

生态位态势理论,即从个体到生物圈,无论是自然还是社会中的生物单元都具有态和势两个方面的属性,态是指生物单元的状态,是过去生长发育、学习、社会经济发展以及与环境相互作用积累的结果;势是指生物单元对环境的现实影响力或支配力,如能量和物质变换的速率、生产力、生物增长率、经济增长率、占据新生境的能力。生物单元态的变化一般呈“S”型曲线,而势的变化则呈“钟”型曲线。特定生态系统中茶生物单元的生态位即是该生物单元的态势与该生态系统中所研究的生物单元态势总和的比值,体现了该生物单元的相对地位与作用。由于生物单元无限增长的潜力所引起的态和势的增加称为生态位的扩充,生态位的扩充是生物圈演变的动力,是生命发展的本能属性。举例分析了不同生物单元生态位测定方法和生态位扩充的不同方式,论述了人类生态位扩充的特殊性。

The paper reviews the study on evolution of endothermy in animal,including the concepts,characteristics and the selective factors.There are eight main hypotheses about the selective factors on evolution of endothermy in animals,including Thermal Niche Expansion Model,Homeothermy and Metabolic Efficiency Model,Decreasing Body Size Model,Postural Change Model,Increasing Brain Size Model,Aerobic Capacity Model,Parental Care Model and Assimilation Capacity Model.The last three are the most important hypotheses.The...

The paper reviews the study on evolution of endothermy in animal,including the concepts,characteristics and the selective factors.There are eight main hypotheses about the selective factors on evolution of endothermy in animals,including Thermal Niche Expansion Model,Homeothermy and Metabolic Efficiency Model,Decreasing Body Size Model,Postural Change Model,Increasing Brain Size Model,Aerobic Capacity Model,Parental Care Model and Assimilation Capacity Model.The last three are the most important hypotheses.The Aerobic Capacity Model suggests that selection acted mainly to increase maximal aerobic capacity that supports physical activity,and elevated resting metabolic rate evolved as a correlated response.Intraspecific studies on vertebrates support that maximal metabolic rate is correlated to resting metabolic rate,but the interspecific data only give limited support.The Parental Care Model hypothesizes that endothermy is arisen as a consequence of selection for parental care because endothermy enables a parent to control incubation temperature.The Assimilation Capacity Model suggests that the endothermy evolution in birds and mammals is driven by two factors:① a selection for intense post-hatching parent behavior,particularly feeding offspring,and ② the high cost of maintaining the increased capacity of the visceral organs necessary to support high rates of total daily energy expenditures.

对动物内温性进化的研究进行了较为系统的论述 ,包括内温性动物概念的由来、特点和起源的选择因子。内温性起源的选择因子包括 8个模型 :热生态位扩展模型、恒温与代谢效率模型、降低个体大小模型、姿势改变模型、增加脑大小模型、有氧呼吸能力模型、双亲行为模型和同化能力模型。其中后 3个模型较为重要。有氧呼吸能力模型认为 ,选择提高支持物理运动的最大呼吸能力 ,而增加的静止代谢作为其相关反应而得以进化。该假说得到种内研究数据的支持 ,而种间的数据并不完全支持。双亲行为模型是指在鸟兽类中 ,内温性是对双亲行为选择的结果 ,因为内温性为双亲控制抚育温度提供了保证。同化能力模型认为 ,在鸟类和兽类中内温性进化由以下两个因素所推动 :①子代出生后双亲行为加强 ;②为支持每日总体能量高速消耗所需 ,动物内脏器官能力增强而导致的较高维持消耗。

 
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