群丛

In the Braun-Blaoquet school the description of synusial associations was not confined to cryptogam communities.

在Braun-Blaoquet学派中，层片群丛的描述不限于隐花植物群落。

The results of the classification and ordination better reflected the relationship of plant associations with environmental gradi...

分类结果很好地反映了植物群丛类型与环境梯度之间的关系，并在DCA二维排序图上得到较好的验证。

Each small quadrat must be more homogenerous than the sociation as a whole.

每个小样方必须比整个基群丛更为统一。

Association A climax plant community named according to the dominant type of species.

群丛：根据主要优势种来命名的植物种群。

Formerly cautious to the point of being uncommunicative, my companions had changed out of recognition.

恒有伴生种加特征种构成群丛或更高级分类单位的"特征种组合"。

Guangxi at elevation of 700～1 300 m , and stretching right to the yellow brown soil mountain of

从这些群丛的外貌、结构和种类成分的变化，可确

Under natural conditions and with human activity, the dominance of Oxytropis coerulea become weaker than ever among associations, which reflects a tendency of inverse succession, while those which are less disturbed by human activity show xerosere character because of poor habitat.

在自然条件和人为干扰双重作用下，蓝花棘豆Oxytropis coerulea在群丛中的优势度明显弱化，群丛反映出逆演替趋势，受人为干扰较少的群丛则由于生境条件较差显现旱生演替特征。

The plant species diversity of 9 associations in the Oxytropis coerulea community of mount Wutai was studied by using richness index, Simpson index, Shannon-Weiner index and evenness index, respectively. The results indicated that: The quantity of populations and species in the community have obvious unevenness character, which leads to variation of λ. index and H' index among different associations. R1 and H' increase firstly, and then decline slowly with the increase of elevation, which reach peak value at 2100 while E1 index waves steadily with elevation change.

应用丰富度指数(R1)、Simpson指数、Shannon-Weiner指数和均匀度指数(E1)研究了9个群丛的植物种多样性，结果表明：种群数量及其种群内个体数量具有明显不均匀性，进而导致λ指数和H'指数在不同群丛间的变化，R1、H'指数随海拔高度增加表现为先上升而后缓慢下降，在海拔2100m处达峰值，E1指数则随海拔变化呈现不稳定波动。

Phragmites australis, by TWINSPAN, and the community characteristics of each association were described. The result of the ordination for 41 samples by DCA revealed the relationships between the pattern of these communities and certain environmental factors, especially the moisture in soil.

样方的DCA排序结果较好地反映了植物群丛类型与环境因子，尤其是土壤含水量之间的关系。28种DCA排序结果较好地反映了群丛的生境特征，优势种的分布格局在很大程度上决定着植物群落的分布格局。

According to the phytosociological theories and methods of Braun-Blanquet's school, the regional savanna vegetation of the dry-hot valleys of Yuanjiang river had been investigated. Based on the principle of fidelity degree, the typical 110 releves taken from every sampling stands of the dry-hot valleys were sorted up from below to upper into 15 Associations, then into 5 Alliances, 2 Orders and 1 Class. A synoptic classification system of Class-Order-Alliance-Association was established for the purpose to reflect deeply the characteristics of all syntaxa there in the aspect of plant component and their abundance-dominancy, presence, cover coefficient, life form, growth form, and ecological environment, community structure, species types and so on.

采用Braun-Blanquet植物群落学研究的理论与方法，对云南元江中上游干热河谷分布的植被进行考察研究，把各处取得较典型的110个样地记录按确限度的原则由下而上归类成15个群丛、5个群属、2个群目和1个群纲，建立了元江干热河谷萨王纳植被群纲—群目—群属—群丛分类系统综合表和15个群丛表，以全面深入反映全干热河谷植物群落各级分类单位中各植物种类组成的多优度、存在度、盖度系数、生活型和生长型等特征及其群落结构、生态环境和种型类别。

Next time I see you,I shall give you a black eye.

下次我看见你，我会打你一顿。

In this paper,design scheme of classification system of wood surface color is established.

提出了木质板材颜色分类的系统设计方案。