tree layer

The vertical structure of plant communities was clear and tree layer generally can be divided into the layer.

群落垂直结构层次分明，乔木层一般都能划分亚层。

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The canopy, mean height and mean breast diameter of tree layer raised step by step, but the species richness and diversity of communities lowed progressively along with community succession;

森林采伐后随着顺行演替的进行，乔木层郁闭度、平均树高和胸径逐渐增长，群落的物种丰富度和多样性指数逐渐降低。

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In this dissertation, a method of multicast key management in UWB MAC layer based on one-way function tree architecture is firstly presented.

本文首次提出一种基于树形结构的UWB MAC层组播密钥管理方法。

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Arthropods communities were extremely significant difference among the tree layer, shrub layer, herbaceous layer and leaf litter layer, the individual number, species number, species diversity and evenness index of Arthropods were the maximum in herbaceous layer.

节肢动物群落在林冠层、灌木层、草间层和枯落物层4个垂直层次之间有极显著差异，草间层具有最高的物种数、个体数、多样性指数和均匀度指数。

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The Carbon storage of Chinese fir plantation ecosystem increased with the increasement of age, which of MP was 1.63 times that of YP, and 1.19 times that of MAP, respectively, and most of the differences among forest ecosystems were in the tree layer;

随林龄增大，杉木人工林生态系统碳贮量逐渐增大，成熟林分别是幼龄林和中龄林的1.63倍和1.19倍，而这种差异主要是由乔木层碳贮量差异引起的。

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By the contrast analysis, we find that rainfall and tree layer crown density are the main factors which had impaction on the canopy interception, throughfall and stemflow. ( 4) The maximum interception capability of the forests.

通过对比分析，得出：降雨量和乔木层郁闭度是影响森林林冠截留、穿透雨和树干流大小的主要因子。（4）森林的最大截留量分析。

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With increasing altitude, α diversity, represented by the Shannon-Wiener index, decreased for both tree and shrub layers, with no clear trend for herb layer.

乔木层和灌木层的α多样性（Shannon Wiener指数）呈下降趋势，草本层则变化不明显；

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Simulation Model of Carbon Storage Dynamics in Temperate Broadleaved-Coniferous Mixed Forest Ecosystem: ⅰ. Dynamics of Carbon Storage in Tree Layer

温带针阔混交林林分碳贮量动态的模拟模型Ⅰ.乔木层的碳贮量动态

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There was no significant difference of diversity index between the tree layer and the shrub layer.

乔木层与灌木层之间多样性各项指标总体无显著差别.

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the vertical structure of each forest community were obvious and could be divided into tree layer , shrub layer , herbage layer and lianas.

各群落垂直结构十分明显，可分为乔木层、灌木层、草本层和层间植物。

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Within the same type , the species diversity inedx was shrub layer > tree layer > herb layer.

在同一类型不同层次中,灌木层>乔木层>草本层.

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study on the scale effect of interspecific association of species in tree layer of the rare plant tsuga longibracteata community

长苞铁杉林乔木层优势种群种间关联及尺度效应研究

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Distribution pattern of tree layer species diversity based on RS and GIS: A case study of water conservation forests in montane regions of eastern Liaoning Province of China

基于RS与GIS的乔木层物种多样性分布格局&以辽东山区水源涵养林为例

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in shrub-tree stage , the species diversity in tree layer was lower than that of shrub layer .

灌乔林过渡阶段群落乔木层物种多样性指数低，而灌木层多样性指数高。

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The major odor chemical constituents of pinaceae plants in tree layer are α-Pinene, Limonene, terpinolene, myrcene,β-pinene, camphor, borneol, ect.

乔木层中松科植物的主要气味化学成分为α-蒎烯、柠檬烯、异松油烯、月桂烯、β-蒎烯、樟脑和龙脑等。

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The entomogenous fungi were mainly distributed in the dead soil covering layer, tree layer and soil layer.

虫生真菌主要分布在枯枝落叶层、乔木层和土壤层。

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The species diversity index of the tree layer and the shrub layer reach its peak in the range of 1000-1200m elevation, the species diversity index decrease below or above this altitude range.

植物群落乔木层和其灌木层的物种多样性，在海拔1000-1200m范围达到峰值，低于或高于这一海拔范围时，物种多样性指数均逐渐降低。

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Study of Tree Layer Dominant Species Photosynthetic Characteristics at North Slope of Funiu Mountain Nature Reserve

伏牛山自然保护区北坡主要乔木优势种光合作用特性研究

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