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生态位幅度
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  niche breadth
     According to values of niche breadth based on gap sizes, the species were classified into 4 types, i. e. the wide, middle, comparatively narrow and narrow amplitute of niche.
     根据树种在不同大小级林隙内的生态位宽度的变化 ,可分为生态位幅度宽、中等、较小和狭小 4类 ;
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  相似匹配句对
     Niche
     生态位
短句来源
     Preliminary research into niche modeling based on fuzzy sets
     模糊生态位初探
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     The niche characteristics of marsh wetland plants could better indicate their ecological adaptability and distribution range.
     湿地植物的生态位特征能较好地表征各植物的生态适应性和分布幅度.
短句来源
     Measurement of Depth of Amplitude Modulation in Broadcast Systems
     广播信号调幅度监测
短句来源
     The Measuring Methods of Pulse Amplitude
     脉冲幅度测量方法
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  niche breadth
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.
      
In addition, the temporal niche breadth and overlap indices varied greatly in relation to disturbance types and season.
      
Population and ecological parameters such as numbers of larvae, microhabitat use, niche breadth and niche overlap of three species of syntopic larval newts (Alpine newt Triturus alpestris, Italian crested newt T.
      
The largest niche breadth was estimated for larval T.
      
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On the basis of investigation on gaps in the tropical montane rain forest of Bawangling Nature Reserve, Hainan Island, regneration niche and related characteristics were analyzed. The results showed that dominances of the same species in gaps of different sizes and developmental stages were different. And dominances of different species in gaps of the same sizes and same developmental stages were also different. According to values of niche breadth based on gap sizes, the species were classified into 4 types,...

On the basis of investigation on gaps in the tropical montane rain forest of Bawangling Nature Reserve, Hainan Island, regneration niche and related characteristics were analyzed. The results showed that dominances of the same species in gaps of different sizes and developmental stages were different. And dominances of different species in gaps of the same sizes and same developmental stages were also different. According to values of niche breadth based on gap sizes, the species were classified into 4 types, i. e. the wide, middle, comparatively narrow and narrow amplitute of niche. According to values of niche breadth based on gap age classes, the species in the tropical montane rain forest were classified into 4 types, i. e. efficient utilization on gap resources comparatively efficient utilization on gap resources not efficient utilization on gap resources, and very few utilization on gap resources. The non-uniformity of species utilization on resources in gaps of different sizes and age classes indicate that niches based on gap sizes and gap age classes for different species were comparatively separated. Through the formation and development of different sized gaps, tree species satisfied their life history process requirements, so that many species can coexist consistantly in the tropical montane rain forest. Calculations on the dominances and niche breadth of tree species in gaps of different sizes and age classes showed that there are a great proportion of low density, narrow niche species in the tropical montane rain forest. These species have a high dependence on whole ecological environment in the tropical forest ecosystem. The probabilities of local extinction are high once the environment changed. The existence of vast quantity of low density, narrow niche species in the forest indicates that the tropical montane rain forest ecosystem is a vulneralbe ecosystem type in terms of species diversity. Great attention should be paid to the diversity conservation of the low density, narrow niche species when any management measures are taken to the tropical montane rain forest.

通过对海南岛霸王岭热带山地雨林林隙更新生态位的研究表明 :同一树种在不同大小和年龄级林隙内的优势度不同 ,不同树种在同一大小和年龄级林隙内的优势度不同。根据树种在不同大小级林隙内的生态位宽度的变化 ,可分为生态位幅度宽、中等、较小和狭小 4类 ;根据树种在不同年龄级林隙内的生态位宽度的变化 ,可分为对林隙时间生态资源利用充分、利用较充分、利用不充分和利用很少的 4类树种。不同的树种或树种组对不同大小和年龄阶段林隙生态资源利用的不一致性 ,表明热带山地雨林中不同树种的林隙大小级生态位和林隙时间段生态位是相对分离的。分析表明 ,海南岛热带山地雨林中有很大一部分树种是属于低密度、狭生态位的树种。从物种多样性的角度来看 ,大量低密度、狭生态位树种的存在表明热带山地雨林是一种较为脆弱的生态系统类型。

In the past 10 years, distribution area has become an important concept in macro ecology. Species geographic range is not only closely related to extinction, niche breadth, and ecological invasion, but is also connected with local abundance and the latitudinal gradient in species richness. In this paper, recent advances in species geographic range (distribution area) were reviewed. The review showed that:(i) The positive abundance geographic range relationship is a very general biogeographic pattern, but...

In the past 10 years, distribution area has become an important concept in macro ecology. Species geographic range is not only closely related to extinction, niche breadth, and ecological invasion, but is also connected with local abundance and the latitudinal gradient in species richness. In this paper, recent advances in species geographic range (distribution area) were reviewed. The review showed that:(i) The positive abundance geographic range relationship is a very general biogeographic pattern, but it is restricted by the history of species, the scale of sample, the mobility of species, etc. (ii) Though the latitudinal gradient in species geographic range size (Rapoport′s rule) sometimes is violated, especially in low latitude regions, it still has significance in biogeography and can be extended to altitudinal gradients of mountains and depth gradients of oceans. (iii) Species geographic range, local abundance, extinction rate, niche breadth, and the latitudinal gradient in species richness and in geographic range size often interact with each other, and a simple positive or negative relation cannot describe their actual relationship. (iiii) The theoretical explanation for the abundance geographic range relationship, Rapoport′s rule, and the latitudinal gradient in species richness is one of the most controversial questions in recent biogeography.

近 10年来 ,分布区已成为宏观生态学的一个重要概念 ,分布区不仅与物种绝灭、生态入侵、生态位幅度密切相关 ,而且还与地方种群密度以及物种多样性的纬度梯度有关。本文总结了近年来物种分布区研究的一些重要进展。研究表明 :1)物种的地理分布与地方种群密度呈正相关是具有普遍意义的生物地理现象 ,但这一关系受到物种的历史、物种的迁移特性和取样大小等因素的影响 ;2 )尽管物种分布区大小的纬度梯度———Rapoport规律有时并不成立 ,但依然具有重要的生物地理学意义 ,并被推广到山体海拔梯度和海洋深度梯度 ;3)分布区大小、地方种群密度、物种绝灭、生态位幅度、物种多样性的纬度梯度以及Rapoport规律是彼此相关和相互影响的 ,简单的正相关或者负相关不能描述彼此间真实的关系 ;4 )如何从理论上解释地理分布与地方种群的关系、Rapoport规律以及物种多样性的纬度梯度是目前生物地理学争论的焦点。

 
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