物种多样性

For long-term restoration,in LS and PS,species richness and diversity will notincrease significantly until the self-thinning stage or the occurrence of naturaldisturbance,because excessive stand density greatly impedes the regeneration ofnative species.

由于LS和PS林分密度过大，在自疏阶段或出现较大程度自然干扰之前，物种多样性将不会有明显的增加。

It was pointed out that to hunt regional humanistic history landscape elements and build modern characteristic landscape. With examples it was discussed how to raise grade and tasting of public space, to improve green-space landscape design of urban key joints, to build specie diversity and mechanism of tree community self-maintenance. And a project called Shang Capital Square was analyzed in layout features, clever used landscape elements, relative between structure and function.

以偃师市为例指出了县级市在景观绿化方面的合理定位和历史教训，提出挖掘地域的人文历史景观元素，塑造现代特色景观的理念，举例说明如何提高公共绿地的档次与品位，加强城市重要节点的绿地系统景观设计，建立物种多样性与群落自我维持机制，并对商都广场的布局特色、景观元素的巧用、结构与功能的关系作了分析。

Three types of community of 5000m^2, where herbaceous scrub, shrub forest and evergreen broad-leaved forest were damaged by M. micrantha, were established in the Country Park of Hong Kong. The herbicide sulfometuron-methy concentration 0.05~0.1 gm^(-2 was tested to Kill M. micrantha. The effect of herbicide sulfometuron-metny killing M. micrantha and its influence on other plants and species diversity in communities were analyzed.

在香港郊野公园内选择薇甘菊危害较严重的草灌丛、灌木林和常绿阔叶林3种群落类型，设置样地5000平方公尺，用0.05~0.1gm^(-2)嘧磺隆对样地中的薇甘菊进行化学防除试验，并在施用除草剂后3、5和14个月跟踪调查施药对薇甘菊的杀灭效果以及对样地中其他植物和群落物种多样性的影响。

The productive capacity and species diversity,etc.are controlled by upper canopy and in a dynamic change.

生产能力、物种多样性等指标受上层体冠控制，并常处于一种动态变化之中。

Our results showed that sampling scale and region should be taken into account when studying species diversity in this 20ha monsoon evergreen broadleaved forest.

本研究结果表明在分析鼎湖山季风常绿阔叶林20ha样地物种多样性时应考虑尺度效应和取样区域。

Evergreen broadleaved forest in Tianmu Mountain National Nature Reserve of Zhejiang Province as an example, a digital elevation model was used to analyze the difference of community biodiversity and basal area under different terrain.

以浙江天目山国家级自然保护区的常绿阔叶林为例，基于DEM在群落尺度上分析不同地形条件下群落物种多样性和胸高断面积的差异。

The patches mosaic pattern and its role in maintenance of species diversity and productivity for the Monsoon evergreen broadleaved forest in Dinghushan Biosphere Reserve have been discussed.

最后，还以鼎湖山季风常绿阔叶林为例，对群落斑块镶嵌结构的形成及其对物种多样性维持和群落生产力构成与维持等方面的意义予以说明。

Community species diversity of secondary forest in Jiuzhaigou Valley Nature Reserve was studied through field investigation.

以九寨沟次生林样地资料为基础，研究了九寨沟自然保护区次生林的物种多样性特征。

Bunin, Ph.D., Organic Policy Coordinator at Center for Food Safety.

Bunin，博士说，继续放宽对基因工程作物的监管会对我们的食品供应，有机物种多样性以及不断增长的世界人口赖以生存的传统农业体系产生巨大的威胁。

Tropic zone shows a higher diversity than frigid zone.

热带比寒带拥有更高的物种多样性。

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。