The annual plants dominated the species and soil seed density during sand dune succession process .

土壤种子库 物种 组成和种子密度均以一年生植物为主。

With the increase of N addition both the species richness and the diversity decreased .

随着氮素水平的增加，群落中 物种丰富度减小， 物种多样性降低；

This forgetting seems to serve that survival of the individual and the species .

因此，遗忘看起来有助于个体和 物种的生存。

Study and protection of the species resources in this region are related to the environment safety and the stability of sustain development of economy in it .

其 科学价值、环境意义都十分重要，尤其是对该区域 物种资源的研究与保护，关系到区域环境安全与经济可持续发展的稳定。

The species differ in their behavior and coloration .

不同 鱼种 的行为和颜色各不相同。

The complex and varied conditions of blasting and explosives with the species has its specific purpose .

工程爆破的条件复杂多样，不同 品种炸药都有它特定的用途。

The procedure of exporting germplasm should therefore be specific to the species .

出口种质的程序因此也应当详细精确地 分门别类。

The species whereto this name might be better applied .

对 那个 物种，这个名字也许用得更恰当。

Methods The species of mosquito collected from different areas of the region were identified .

方法借鉴 有关 蚊类调查资料，结合本地区地理概况进行综合分析。

Objective To understand the species diversity of ectoparasites on Niviventer confucianus in the surrounding areas of Erhai Lake .

目的调查云南省洱海周边地带社鼠体表寄生虫 的 多样性。

Methods To investigate the species and density of rodents in different habitats in Guangzhou city .

方法对各种环境现场调查 的鼠 情进行分析及数量统计。

Among the species whose names have been'sold'in this way are orchids frogs and insects from Bolivia Madagascar and the Philippines .

其中以这种方式“售卖”名字 的 物种有玻利维亚、马达加斯加和菲律宾的兰花、青蛙和昆虫。

Objective : in order to provide scientific basis for the species systematics and quality evaluation of Chinese drug tougucao the comparative studies on antiinflammatory and analgesic effects were carried out .

目的：对5 种透骨草进行抗炎、镇痛作用的比较研究，为 其 品种整理和品质评价提供科学的方法和依据。

Meanwhile the species areal-types of Guangdong Gymnospermae were divided into 20 subtypes in this paper .

同时 论文还将广东 裸子植物 种的分布区类型划分为20个亚型。

The species composition and characteristics of mangrove flora in the world were reviewed and discussed .

探讨了世界红树林植物区系 的 种类组成及其特点。

The real threat to the species is loss of habitat as towns spread into the countryside .

对 物种 的主要威胁在于随着城镇向乡村扩展而使栖息地日益减少。

A key to the species and Chinese and Latin descriptions of the new species are provided .

文中列有 上述 种类的分种 检索 表 和 新种的中文和拉丁文描述。

Article 9 The state shall give special protection to the species of wildlife which are rare or near extinction .

第九条国家对珍贵、濒危的野生 动物实行重点保护。

We identify the species at risk diagnose what 's wrong but then we don 't treat them .

我们确定了处于危机状态 的 物种，分析了问题之所在，但是没有去处理。

The floristic composition and the species diversity of Cyclobalanopsis glauca forest in Gutian Mountain Nature Reserve of Zhejiang province were analyzed .

分析了浙江古田山自然保护区青冈林的植物区系组成和 群落 物种多样性。

The species diversity decreases from shrub tree to herb layer .

灌木层一乔木层一草本层 物种多样性依次递减。

The variety of the species is necessary for the balance of ecological system .

物种的多样性是生态系统平衡所必需的。

Winter brings 2 Steller 's sea-eagles to the coast of Hokkaido-almost a third of the species ' population .

冬天，2000只虎头海雕来到北海道海岸，这个数字占了 该 物种总数量的三分之一。

Objective To understand the species distribution of ectoparasitic chigger communities on small mammals in Yunnan province .

目的了解云南省小型哺乳动物寄生恙螨种类和 数量分布情况。

The species diversity of weeds community of vegetable ecosystem is high in Xiangtan suburb fallow during winter season .

对湘潭市郊菜地生态系统冬季期间杂草植物群落 的 物种多样性进行了初步研究。

Objective To analyze the species diversity and faunal composition of Calyptratae in Emeishan area of Sichuan province .

目的从种数和区系成分等角度分析四川省峨眉山地区有瓣蝇类 的 物种多样性。

The species distribution and occurrence of common diseases of improved variety Australian bovine were investigated and analyzed .

对良种澳牛发生的常见病 种类、分布及发生率进行了调查与分析。

The species is fast becoming a rarity .

这种 物种变得越来越稀有了。

Local and regional processes control species richness of plant communities : the species pool hypothesis

局域和区域过程共同控制着群落的物种多样性： 种库假说

The zoo provides classes of service by tailoring habitats to the species of animal they are to contain .

动物园通过按将要包含 的动物 种类来定制栖息场所，从而提供分类服务。