shrub layer

In Prunus mongolica Maxim seed bank, the vertical distribution of Prunus mongolica Maxim seeds mainly concentrated in the litter layer. The horizontal distribution of seeds mainly distribute in the range of 2 meter that distance to the shrub center.

在蒙古扁桃种子库中，蒙古扁桃种子的垂直分布，主要集中在枯枝落叶层里；种子的水平分布主要是在距灌丛中心2m的范围内，灌丛外种子数量明显减少。

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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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Correlation analysis showed that: In the herb layer, the middle slope and the check have the greatest similar coefficient, in the shrub layer, the similar coefficient between the upper slope and the down slope was biggest. 3.

通过相关性分析表明：在草本层，坡中部和对照有最大的相似性系数，在灌木层，坡上部和坡下部的相似性系数最大。

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Diversified nature of shrub layer does not suffer too many influences of arbor layer. And diversified nature of herbaceous layer shows to the clearer negative correlation relation with the arbor layer.

灌木层的多样性并没有受到乔木层的太多影响；而草本层的多样性与乔木层表现为较明显的负相关关系。

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that the species structure is complicated. the communities have four layers-tree stratum, shrub layer, lianas and herb layer.

总体上物种多样性高，种类组成复杂，群落乔木层、灌木层、草本层和层间植物层次明显。

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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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Among virgin forest, over-cut forest, and secondary forest, it was proved that plant diversity in different layer ( stand crown, shrub and grass) in varieties of communities depended on degree of disturbance.

通过对原始林、过伐林、次生林等受到不同程度人为干扰的森林类型的植物多样性的调查研究认为，干扰程度不同，不同群落各个层次植物多样性指数大小及次序变化不同。

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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 average content of soil available N of layer 0~ 60 cm gradually increases at the stages of herbage and arbour with vegetation restoration, and the change at the stage of shrub is just the contrary.

0～60cm土层土壤速效N的平均含量在植被恢复的草本和乔木阶段，随植被的恢复演替而不断增加，在植被恢复的灌木阶段其含量变化则相反。

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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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All the tree species in shrub layer were contagious distribution.

灌木层主要树种均呈集群分布。

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species richness for the shrub layer was the largest in the three communities.

在3个样地中灌木层中的物种丰富度指数均为最大。

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the results indicate that there are obvious two parts of population structure, one is robinia pseudoacacia seedlings from age stage 2 to age stage 10 in shrub layer, the other is robinia pseudoacacia arbor from age stage 17 to age stage 26 in arbor layer.

研究结果显示，刺槐的种群结构明显的分为两个部分，即构成林下灌木层的刺槐幼苗（龄级：2-10）和构成乔木层的刺槐（龄级：17-26）；

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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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The community can be structurally divided into arborous layer, shrub layer and herbaceous layer.

群落可分为乔木层、灌木层、草本层和层间层。

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The diversity indexes of tree, shrub and herb layer in various plots had a little difference.

乔木层、木层、本层的多样性各项指标在群落各样地间均有一定的差异,相对而言, 灌木层、木层的差异较小,草本层的差异较大.

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D and H ′ of species diversity indexes of identical layer are different, but it has basically the same tendency in different growth stages of Sophora davidii community. Species diversity indexes of shrub layer increase with increasing time.

同一层次的物种多样性指数D和H′虽然数值不同，但在不同阶段狼牙刺群落有基本一致的趋势，灌木层物种多样性指数基本上随恢复时间的增加而增加；

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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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Both Shannon-Wiener index and Pielou evenness index in the tree and shrub layers showed downward change with increasing altitude, with no clear trend for herb layer.

乔木层和灌木层的Shannon-Wiener指数和Pielou指数均是随海拔的上升而下降，且草本层的变化趋势不明显。

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Whereas, for H', D, PIE and Jsw, it is herb layer> tree layer> shrub layer.

但在H′、D、PIE、J（sw）和J（si）方面，表现为：草本层＞乔木层＞灌木层。

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