助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   eco niches 的翻译结果: 查询用时:0.006秒
图标索引 在分类学科中查询
所有学科
植物保护
更多类别查询

图标索引 历史查询
 

eco niches
相关语句
  相似匹配句对
     Legend of ECO
     ECO传奇
短句来源
     Eco Miyun
     生态密云
短句来源
     Eco-niches of major weeds in rice fields in Shenyang,China
     沈阳地区水田主要杂草种群的消长动态及生态位分析
短句来源
     The reason was analysed by the theory of niches.
     应用生态位概念分析了造成区别的原因
短句来源
     (2) Shallow and irregular niches.
     (2)表浅不规则龛影。
短句来源
查询“eco niches”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  eco niches
All these regimes interlink to form a prism of nested rights applying to nested eco-niches across the landscape, and overtime.
      


The residential mobility can be also analysed in the domain of urban ecology. In the current situation of Beijing, because the refidents tend to live in the old city whose life eco niche is higher than that of other areas, in the housing area renewal it is difficult to make the local residents move out. Under these circumstances, the current renewal method which causes a large number of local residents to move out will exert a negative influence to the fine circle and ecological benefit of urban...

The residential mobility can be also analysed in the domain of urban ecology. In the current situation of Beijing, because the refidents tend to live in the old city whose life eco niche is higher than that of other areas, in the housing area renewal it is difficult to make the local residents move out. Under these circumstances, the current renewal method which causes a large number of local residents to move out will exert a negative influence to the fine circle and ecological benefit of urban ecosystem. According to the researches on cultural adaptability, it is possible to make the population density remain at a relative high level in the old city of Beijing.

从生态学的角度分析 ,由于人口会向生活生态位高的旧城区集聚 ,因而形成了现阶段北京旧城居住区改造中外迁人口的困难。在这种情况下 ,如果按照目前的大量外迁人口的改造方式 ,则会对整个城市生态系统的良性循环和生态效益产生消极影响。根据调控对策分析 ,应将人口外迁量控制到合理的位置 ;同时 ,依据对文化适应的研究 ,在北京旧城居住区保持较高的人口密度也是有可能的

Ecological restoration is a process of selective regeneration and redevelopment of degraded ecosystems at multiple scales (degraded natural ecosystems and/or human ecosystems), which has two essential types: human-dominated vs natural-dominated ecosystems restoration.Based on the principles of ecological economics,the authors in this paper discuss the following issues on the principles of integration for ecological restoration engineering:Firstly, the authors present an inverse-S type relations between degree...

Ecological restoration is a process of selective regeneration and redevelopment of degraded ecosystems at multiple scales (degraded natural ecosystems and/or human ecosystems), which has two essential types: human-dominated vs natural-dominated ecosystems restoration.Based on the principles of ecological economics,the authors in this paper discuss the following issues on the principles of integration for ecological restoration engineering:Firstly, the authors present an inverse-S type relations between degree of ecosystems degradation and degree of ecosystems restoration, which shows that to the more extent the ecosystems degrade, and the less the degraded ecosystems can restore.To effectively describe quantitatively an overall process of ecological restoration, a scale of vector value to gauge the progress of degraded ecosystems restoration is presented and a mathematical expression of an ecological restoration progress with such an identical scale of vector value is established. From this mathematical formula, the restoration progress of degraded ecosystems depends upon its initial position or state to start its restoration, the speed or period of restoration, the constraints of costs,benefits,efficiencies and scales from physical, biological, chemical and human dimensions. The overall vector value of ecosystems restoration consists of three components: the value of restored ecosystems composition, that of restored ecosystems' structures and that of restored ecosystems' functions. The final endpoints where the process of restoration can arrive at may be identified as 4 types: (1) the level of homogeneity: degraded ecosystems may get to the position where it has the same/similar compositions, structure and functions as before its degradation; (2) the level of homotype: degraded ecosystems may get to the position where it has the same/similar structure and functions but the different compositions from before its degradation; (3) the level of iso-functionality: degraded ecosystems may get to the position where it has the same/similar ecological functions but the different compositions and structures from before its degradation; (4) the level of heterogeneity: degraded ecosystems may get to the position where it has different compositions, structures and functions from before its degradation. Based on the quantitative formula of the progress of ecosystems' restoration, a set of determinant criterions for the success of ecosystems' restoration are also discussed, which include a 4 components as restored ecosystems' capacities of self-maintenance, ecological integrity, self-regulation and self-organization. The former 3 components may be integrated as the capacity of restored ecosystems' health, and the last one as the capacity of self-developments.Ecological restoration is a kind of ecological integrated engineering, its procedure includes: investigations and diagnosis of degraded ecosystems, multiple ecological feasibility analyses of degraded ecosystems restoration, integrated planning and design of restoration engineering, integrated implementation of restoration engineering, post-restoration evaluation and ecological integration management system; one emphasized point is that the ecological integration management system should be essential to the overall process of restoration engineering. Ecological restoration should be rooted in some essential principles, for definite objectives of ecological restoration, these principles should be grouped, and be further integrated or combined. From this point of view, a grouping system of these principles are presented as follows:(1) Temporal related group: eco-niche principle, mesial effect principle, hierarchy principle, successional series principle, social equity principle etc.;(2) Spatial related group: edge effect principle, eco-niche principle, mesial effect principle, hierarchy principle, successional series principle, etc.;(3) Structural related group: key ecological factors ( there are some ecological factors that dominate the ecological restoration process), eco-nich

生态恢复是不同层次上退化生态系统的选择性再生与再发展过程 ,它包括人类主导作用下的生态系统恢复和自然主导下的生态恢复 ,它具有自然性、经济性、人文性和选择性。以生态经济原理为基础 ,首先提出了生态系统退化度与恢复度理论上存在的反 -S型关系 ,讨论了在统一矢量价值标尺下恢复演进过程的数学描述与恢复的判定准则。作者进一步讨论了生态恢复工程的一些系统集成原理 ,包括系统集成的技术流程、基本原则的关联组合体系、恢复技术的组装与集成体系、生态恢复模式的分类系统及其在生态集成管理体系下以成本约束、效益约束、尺度约束为核心的模式集成系统、生态恢复系统目标 -模式 (速度与路径 ) -成本 /效益 /效率的价值耦合链的建立

The composition,growth and withering,dominant species and eco niches of the weeds in rice fields in Shenyang were investigated.The results showed that Echinochloa crusgalli,Bidens frondosa,Ammannia arenaria,Ludwigia prostrata,Eleocharis acicularis,Myosoton aquaticum,Rorippa islandica and Centipeda minima.Echinochloa crusgalli and Bidens frondosa are the main eco damaging populations in paddy fields of the area.Based on the calculation of time,horizontal and vertical breadth eco...

The composition,growth and withering,dominant species and eco niches of the weeds in rice fields in Shenyang were investigated.The results showed that Echinochloa crusgalli,Bidens frondosa,Ammannia arenaria,Ludwigia prostrata,Eleocharis acicularis,Myosoton aquaticum,Rorippa islandica and Centipeda minima.Echinochloa crusgalli and Bidens frondosa are the main eco damaging populations in paddy fields of the area.Based on the calculation of time,horizontal and vertical breadth eco niches of the weed community, Echinochloa crusgalli and Bidens frondosa are the dominant species.Their niches overlap extensively.Mono application of barnyardgrass killing herbicide can induce spreading of broadleaf weeds such as Bidens frondosa .

对沈阳地区水田主要杂草群落的种类组成、消长动态规律及其生态位的研究结果表明 :沈阳地区水田杂草群落主要由稗 (Echinochloacrusgalli)、大狼把草 (Bidensfrondosa)、耳基水苋 (Ammanniaarenaria)、丁香蓼 (Lud wigiaprostrata)、牛毛毡 (Eleocharisacicularis)、鹅肠菜 (Myosotonaquaticum)、风花菜 (Rorippaislandica)和石胡荽(Centipedaminima)组成 ,其中 ,稗、大狼把草、丁香蓼和耳基水苋为主要危害种群 ;从时间、水平和垂直生态位宽度值来看 ,稗和大狼把草为本地区水田杂草群落中的优势种群 ,且 2者的生态位重叠值较高 ,若单独使用杀稗类除草剂 ,必然会导致大狼把草等阔叶杂草的猖獗和蔓延

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关eco niches的内容
在知识搜索中查有关eco niches的内容
在数字搜索中查有关eco niches的内容
在概念知识元中查有关eco niches的内容
在学术趋势中查有关eco niches的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社