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forest canopy structure
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  林冠结构
     Review on Forest Canopy Structure,Radiation Transfer and Canopy Photosynthesis
     林冠结构、辐射传输与冠层光合作用研究综述
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  “forest canopy structure”译为未确定词的双语例句
     Some main conclusions in this study are as follows:(1) With the studying of Robinia pseudoacacie and Populus simonii plantations, it is showed that the rainfall intercreption of forest canopy were both influenced by the charater of rainfall and forest canopy structure.
     (1)对刺槐和小叶杨林的研究说明,降水特征和林分结构特征共同影响其林冠截留;
短句来源
  相似匹配句对
     forest .
     林。
短句来源
     PREDICTIVE MODELS OF FOREST CANOPY INTERCEPTION
     林冠截留模型
短句来源
     Progress on sampling of forest canopy arthropods
     森林冠层节肢动物取样研究进展
短句来源
     Forest of Ababaik
     阿巴白克的森林
短句来源
     THE TRANSMISSIVE AND REFLECTIVE THEORETICS OF LIGHTFOR VARIOUS STRUCTURES OF THE FOREST CANOPY
     林冠的结构和光的分布——光的透射和反射理论
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  forest canopy structure
Methods to assess tropical rain forest canopy structure: an overview
      
Spatial pattern analysis of pre- and post-hurricane forest canopy structure in North Carolina, USA
      
All patches were located in areas with similar forest canopy structure and slope in three Central Hardwood forest stands prior to seed fall.
      
The method was found to be effective in analyzing the forest canopy structure of large areas, but it is not suitable for the detection of small gaps.
      
A method was developed using aerial photographs to analyze forest canopy structure.
      
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The relation between water drop kinetic energy and surface soil erosion has been studied here. Two types of land surface have been taken into consideration, they are bare land without any vegetation on it and eucalyptus forest land without any undercover. The results showed that there was a close relation between water drop kinetic energy and soil erosion intensity of unit rainfall, and the water drop kinetic energy was the direct factor which caused the soil erosion of land surface. For bare land, its erosion...

The relation between water drop kinetic energy and surface soil erosion has been studied here. Two types of land surface have been taken into consideration, they are bare land without any vegetation on it and eucalyptus forest land without any undercover. The results showed that there was a close relation between water drop kinetic energy and soil erosion intensity of unit rainfall, and the water drop kinetic energy was the direct factor which caused the soil erosion of land surface. For bare land, its erosion intensity was determined by atmospheric raindrop kinetic energy. However, for eucalyptus forest land, it was relative to throughfall water drop kinetic energy and had no relation with that of atmospheric rainfall. Throughfall kinetic energy can not be affected by atmospheric precipitation intensity, but it is determined by the structure of forest canopy (including tree species, canopy density, leaf area index, height of canopy etc). And thus, when atmospheric precipitation intensity in open place is smaller, the parameter λ (in %) will be larger, which means that the forest canopy will enlarge the soil erosion of forest land. Correspondingly, when atmospheric precipitation intensity in open place is larger, the parameter λ (in %) will be smaller, which means that the forest canopy will reduce the lashing of waterdrops to forest land, and thus, have the positive effects on soil conservation. The value of λ changes with atmospheric precipitation intensity, rainfall, height of canopy and canopy density. The characteristics of soil erosion for these two studied areas were different. Soil erosion from the eucalyptus forest land was mainly caused by the rainfall with middle and small precipitation intensity, but that from bare land was mainly caused by the rainfall with heavy precipitation intensity. As a whole, the canopy of eucalyptus forest increased the impact of water drop to land surface, especially in the situation of middle and small intensity of atmospheric precipitation. This study explained that we should consider the influence of forest canopy structure on forest land erosion when making plantation.

本文研究了水滴动能与地表侵蚀的相互关系问题,通过对相邻的两个地类:没有任何植被的光裸地和地表同样光裸但有人工桉树林的2个试验小集水区的对比研究,说明了单位雨量下的侵蚀强度与水滴动能存在最为紧密的关系。裸地地表的侵蚀强度决定于大气降水动能,而桉树林地的侵蚀强度却主要与林冠的穿透水水滴动能成正相关。总的说来,桉树林林冠的存在加大了林地所接受的降水动能,特别是在中小降雨强度的情况下更是如此,这就说明了营造人工林时,必须考虑到林冠结构与林地地表冲蚀的问题

Virtually all ecological investigations are conducted and constrained within a range of time and space. This suggests that interpretations of the results must be specific and that extrapolations must be made with caution. We present a hypothetical example illustrating temporal and spatial interactions as confounding factors in ecological research. Through a series of case studies, we illustrate the importance of placing our hypotheses, results from testing those hypotheses, and our conclusions in relevant...

Virtually all ecological investigations are conducted and constrained within a range of time and space. This suggests that interpretations of the results must be specific and that extrapolations must be made with caution. We present a hypothetical example illustrating temporal and spatial interactions as confounding factors in ecological research. Through a series of case studies, we illustrate the importance of placing our hypotheses, results from testing those hypotheses, and our conclusions in relevant scales of time and space. Our case studies focus on the ecological effects of scale for determining pattern_process relationships in a montane spruce_fir forest in China, modeling forest canopy structure, predicting carbon flux in forests the Pacific Northwest, USA; detecting temporal scales of variation in carbon flux and meteorological data from deciduous forests in Oak Ridge, Tennessee, USA; and formulating conclusions from a long_term soil_warming experiment of peatlands in Minnesota, USA. We recommend additional efforts for examining ecological phenomena across multiple temporal and spatial scales.

众所周知 ,几乎所有的生态学特征和现象都受限于一定的时间和空间。因此 ,相应的科学假设和相关的生态学结论也只能基于这些特定的时空尺度范围。我们利用颇为熟知的事例 ,引用生态学文献中的具体实例 ,提纲挈领地论述了时空在生态学研究中的重要性。这些实例包括我们在长白山对云、冷杉 (Piceajezoensis,Abiesnephrolepis)林林冠结构的模拟、在北美应用遥感和气象方法对碳通量的估算 ,以及测定湿地生态系统对加温的反应等。文中所涉及的所有生态学现象 ,对时间和空间都有强烈的依赖性。因而 ,从生态学问题的提出 ,到科学假设的演绎 ,以至试验设计和综合数据分析 ,都必须以时、空为前提 ,才不至于导致荒谬结论。

Forest canopy is regarded as a most direct and active interface between the forest and its outer environment. At the meantime, it also contains the main part of the forest biodiversity. The methods and techniques for studying forest canopy have progressed greatly in the recent years, which promoted the researches on the forest canopy structure and function. These researches deepened the recognition on the relationships between the forest canopy, light capture and dry matter accumulation within...

Forest canopy is regarded as a most direct and active interface between the forest and its outer environment. At the meantime, it also contains the main part of the forest biodiversity. The methods and techniques for studying forest canopy have progressed greatly in the recent years, which promoted the researches on the forest canopy structure and function. These researches deepened the recognition on the relationships between the forest canopy, light capture and dry matter accumulation within the community, and also, deepened the understanding of the material cycle, energy flow and the dynamics of interrelations among the trophic levels within the canopy. The studies on the forest canopy structure and function as well as their temporal spatial changes are the bases for deep understanding the pattern, process and mechanism of whole forest ecosystem.

林冠是森林与外界环境相互作用最直接和最活跃的界面层 ,同时 ,它本身又承载了森林生物多样性的主体部分。森林冠层研究的方法和技术在近些年取得了长足发展 ,从而促进了有关林冠结构与功能的研究。这些研究深化了人们对于林冠结构与光能截获以及群落干物质积累之间关系的认识 ,同时 ,对于森林冠层的物质循环和能量传输以及冠层内各营养级之间相互关系动态也有了更为深入的理解。考察森林冠层的结构与功能及其时空变化是深入理解整个森林生态系统的格局、过程及其运作机制的重要基础。

 
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