物种多样性

The Shannon-Weaver and Simpson indexes is 4.195 and 0.021 respectively,the evenness is 0.880 and 2.962.The species-abundance relationship fits logarithmic series distribution.

结果表明海南岛吊罗山山地雨林物种多样性指数Shannon-Weaver和Simpson指数分别为4.195和0.021，均匀度为0.880和2.962。

The results showed that:(1) soil densi-ties of urban roadside and park forests were higher than mean density of natural forest soil.

本研究是广州城市植被的土壤、物种多样性、行道树和生态功能的综合调查。

Content: Pure cultivation of microbes and microtechnique, cell structure and function of microorganism, nutrition of microbes, metabolism of microbes, reproduction of microbes and its control, microorganic genetics and gene engineering, microbial ecology, evolution, phylogenesis, classification, microbial industry and products.

课程内容：微生物的纯培养与显微技术；微生物的细胞结构与功能；微生物营养；微生物代谢；微生物生长繁殖及控制；微生物遗传及基因工程；微生物的生态；微生物进化系统发育和分类鉴定；微生物物种多样性；微生物传染与免疫；微生物工业及产品。

This study was carried out in collective-owned summer grassland in Ganchaitan, which is located at the south foot of eastern Lenglongling Mountain (a branch of north Qilian Mountain), with yak and Tibetan sheep miscellaneously grazed on it. The grassland type could be classified as alpine meadow, dominated by Potentilla froticosa shrub. This study, under grads grazing stress, focused on the community structure, composition, species diversity, above-ground biomass of PFS, by using pane net sampling based on spatial distribution in stead of temporal succession. Results showed that: Grazing stress negatively related to the distance between grazing area and resident area.

以祁连山北支冷龙岭东段南麓的甘柴滩夏季牧场集体长期混合放牧的高寒金露梅Potentilla froticosa灌丛草场为对象，利用空间分布代替时间演替的方法，采用方格网法取样分析调查，对不同放牧压力梯度下金露梅灌丛群落的结构、组成、物种多样性、地上生物量进行研究，结果表明：①放牧居住点由远到近，放牧压力梯度不断增加，金露梅株高、密度、覆盖度、地上生物量和丛间草地的地上生物量均有不同程度的降低，地上的总生物量降低幅度达84.77%。

The species diversity of different gangue piles at northern slope in Sunjiawan was studied with field investigation and statistical analysis.

采用野外调查和统计分析相结合的方法，对孙家湾矸石山阴坡不同排砰年限地段物种多样性进行研究。

The paper studies mostly: the community structure of Orthoptera, fauna analysis, species diversity, similarity of insect community in different habitats, the analysis of ecological species group, and the origin and evolution of insect and plant community in Daqinggou Nature Reserve.

主要内容包括：直翅目昆虫群落的结构、区系组成、以及物种多样性，不同生境中昆虫群落的相似性分析，昆虫生态种组的聚类分析，最后讨论了大青沟直翅目昆虫的区系起源演化和大青沟植物群落的起源问题。

The objectives of this study are to explore Polycarpa species diversity in Taiwan and to infer their molecular phylogeny.

本研究目标是了解台湾产多囊海鞘的物种多样性及其分子亲缘关系。

On the basis of quadrate investigation of Prunus divaricata Form.,structure and species diversity of the Form.were analyzed in Western Tianshan Mountain of Xinjiang Province.

在采用样方法调查的基础上，分析了位于新疆西天山樱桃李植物群落的组成结构和物种多样性特征。

But the species diversity has no significant correlation with the minimum distance to source area. This suggests that immigration and recolonization for Raniformes species have hardly occurred on Zhoushan archipelago after the islands were formed, and the species number on the islands is under the "non equilibrium" status.

但物种多样性与离物种源的最小距离没有显著相关性，这说明岛屿形成后蛙类在岛屿间很少发生迁移和再定居，物种数处于"非平衡"状态。

The ecological significance of the different responses of seedling regeneration to light environmental heterogeneity for biodiversity maintenance in forest, forest succession and revegetation were discussed.

接着从森林物种多样性维持、森林演替和植被恢复的角度探讨了幼苗更新对光环境异质性不同响应的生态学意义。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。