灌木层

在灌木层，β多样性随海拔增高而降低；

In the shrub layer , β diversity declined as altitude increasing .

在3个样地中灌木层中的物种丰富度指数均为最大。

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

灌木层H值为2.308；

Brush layer 2 . 308 ;

群落的结构层次可分为乔木（I、II）层、灌木层和草本层；

The structure of communities is complex which can be divided into tree layer ( I , II ), shrub layer and herb 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。

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

对祁连山不同类型条件下的祁连圆柏群落生物量和营养元素积累量的测定结果表明：祁连圆柏群落生物量为231.20t／hm2，其中乔木层占98.34%，灌木层占1.60%，草本层占0.06%；

Biomass and nutrient element accumulation of Sabina przewalskii forest community of different types were measured in the Qilian Mountains .

草本层最小取样面积动态主要受S的影响，而乔、灌木层的最小取样面积变化则与J紧密相关。

The minimum sample area of the herb stratum is mainly affected by S but those of the tree and shrub stratum are mainly affected by J.

草本层丰富度、Shannon-Wiener指数和Simpson指数都大于灌木层。

The Richness of herb layer , Shannon-Wiener index and Simpson index were higher than shrub layer . 6 .

2）处于亚顶极阶段的森林群落各层次多样性指数（D和H′）特征是乔木层<草本层<灌木层；

2 ) communities at the sub climax stage also showed different trends in diversity among layers & diversity indices ( D and H ′) were lowest in the tree layers followed the herb and shrub layers sequentially ;

乔木层、灌木层和草本层植物的β多样性（Cody指数）均随着海拔的升高而下降。

β diversity , indicated by the Cody index , declined with increasing altitude for all three layers .

乔木更新层与灌木层的异质性规律发生显著变化（拐点）的尺度不同，分别为40m和90～100m。

The strong changing scales ( inflection points ) of tree regeneration layer and shrub layer were 40m and 90 ~ 100m respectively .

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；

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 .

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

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 .

利用双向指示种分析法（TWINSPAN）和除趋势对应分析（DCA）对昆嵛山不同林分类型下的灌木层和草本层进行了数量生态学分析。

The TWINSPAN classification and DCA ordination were employed for the quantitative analysis of the shrub layer and herbage layer under different stands .

林冠层穿透水和灌木层穿透水中Fe，草本层滴透水中Fe、Zn为负淋溶，其余各元素浓度有所增加。

The Fe concentration in the through-fall of canopy and shrub layer as well as the Fe and Zn concentrations in the dripping of herb layer were lower , while the concentrations of other elements were higher than those in the rainfall .

演替期间，各层S稳定增加灌木层和草本层建立初期J较高，H与S呈正相关，以后J下降，H却与J呈负相关，乔木层H始终与J呈正相关。

J is higher and H is associated positively with S at the initial phase of the shrub and herb strata , and later J decreases and H relates to J positively . However , H of tree stratum is always not negatively correlated to J.

平均不含灰分热值（AFCV）从低到高依次是草本层（18.55KJ／g）、灌木层（19.72KJ／g）、乔木层（21.19KJ／g）。

The ash free calorific value ( AFCV ) was the highest in the tree layer , the second highest in the shrub layer and the lowest in herbaceous layer . They were 21.19, 19.72 and 18.55 KJ / g , respectively .

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。

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 .

从乔木层、灌木层到草本层，灰分含量依次增加，GCV和AFCV则依次降低。

The mean ash content increased in an order from tree layer , shrub layer to herb layer , while those of GCV and AFCV decreased .

灌木层平均高0.43m，包括高位芽和地上芽2种生活型层片，根系多分布至1.5m以下的土层中，根幅>2m×2m；

Asia to C. Asia elements . The average hight of bush layer is 0.43 m and it consists of the phaenerophytes and the chamaephytes synusia , its root system distributes under 1.5 m soil layer .

CSV指数分析显示乔木层在＞40m取样尺度，灌木层＞20m取样尺度群落结构出现明确变异规律；

The result of CSV index analysis shows , that the obvious variation of community structure appeared at > 40m sampling scale in canopy layer , whereas the sampling scale was > 20m in shrub layer .

灌木层分为两个亚层：灌木Ⅰ层（3-5m）和灌木Ⅱ层（1-3m），其分别占总株数8.23%和32.49%；

, and shrub layer have two sub-layers : 3-5m ( 8.23 % ) and 1-3m ( 32.49 % ) .

结果表明，林内郁闭度为0.75，平均胸径为6.67cm，平均高度为8.01mm，物种丰富度，Shannon-Wiener指数，Simpson指数由草层向灌木层、乔木层逐层递减。

The results show that plantation density is 0.75 , DBH is 6.67 cm , average height is 8.41 m , and species richness , Shannon-Wiener index , Simpson index generally reduce from herb layer to arbor layer .

通过Shannon指数尺度变化曲线的估计，该样带α多样性研究的比较适宜取样尺度分别为，乔木层60m，灌木层70m和乔木更新层＞80m。

The sampling scales of α diversity on the transect were 60m for canopy layer , 70m for shrub layer and > 80m for tree regeneration layer respectively , based on the scale changing curve of Shannon index .

灌木层种间相遇机率指数和Shannon-Wiener指数较高，表明该群落目前仍相对稳定，该地区外来飞机草目前处于种群建立时期。

Both probability of interspecific encounter index and Shannon-Wiener index of diversity in shrub layer are relatively high , suggesting that this community is relatively stable , and E. odoratum is at the stage of population establishment .

本区落叶阔叶林1m样带最佳分割尺度为：乔木层40m，更新层80m、灌木层20m。样带法在研究植物群落随环境梯度变化格局中具有重要价值。

The suitable lengths of the 1 m transect in deciduous broad leaved forest in this area are proposed to be 40 m , 80 m and 20 m for canopy layer , regeneration layer and shrub layer , respectively .

从物种多样性指数的平均值来看，灌木层的物种多样性大于乔木层，但乔木层和灌木层之间的Shannon指数和群落均匀度无明显的差异；

The results showed that there were 5 types of the communities with Taxus mairei , which species diversity of the shrub layer was higher than those of the tree layer , but there were no significant difference in the Shannon diversity index and evenness ;

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。

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 .

灌木层主要树种均呈集群分布。

All the tree species in shrub layer were contagious distribution .

灌木层一乔木层一草本层物种多样性依次递减。

The species diversity decreases from shrub , tree to herb layer .