物种量

同时运用植被覆盖度、结构、物种量和相对物种量等级评价以及对Zn、Cd等6种污染物的质量指数进行了评价。

The impact on the ecological environment surrounding the landfill was evaluated by the following elements : vegetation coverage , structure , species scalar , relative species scalar and quality index .

结果表明：随着Fe物种负载量的增加，催化活性有所提高；

The results show that the catalytic activity increased with the amount of Fe species on ZSM-5 surface .

与催化剂表面接触时间不宜过长，5min以内较为适宜，过长则表面覆盖碳物种的量达到饱和，CH4解离活性低。

Prolonged exposure may lead to saturate surface carbonaceous species and lowered the activity of CH4 decomposition on catalysts .

结果表明，对照和UVB处理时小麦和野燕麦的密度制约死亡规律没有显著差异，相对较大的竞争压力加强了UVB对这两个物种生物量降低的效应。

The density dependent mortality of both wheat and wild oat did not exhibit a significant difference between control and UV B treatments .

为精确估计民勤典型绿洲荒漠过渡带中优势物种生物量，我们用随机选取的82个10m×10m的样方进行优势物种调查。

The biomass of the dominant plant species in a typical oasis-desert ecotone ( ODE ) of Minqin was measured in 82 plots ( 10 m × 10 m ) .

根据调查所获得的样品，分析了浮游动物物种和量及其分布，以及浮游动物分布与环境因素之间的关系。

The relationship between zooplankton distribution and environmental conditions was discussed .

荒漠优势物种生物量的定量测量是荒漠土壤管理的重要依据。

Most desert soil management decisions are based on quantitative measurements of the biomass of the dominant plant species .

这一物种资源量在长江中下游地区是非常丰富的，特别是太湖地区。

In China , the resource quantity of this species is very abundant in lower and middle reaches of the Yangtze River , especially in the Taihu Lake .

学生：嗯，如果静水的量比其生态系统能支撑很多物种的量要少的话，因为很多昆虫鱼类和蛙类都不能在流动水中生存，

Student : Well if there is less standing water than the ecosystem can support its many species , because a lot of insects and fish and frogs can 't live in running water ,

根据图形表示的特点构造出新的协方差矩阵CM，然后从矩阵中提取出2维特征向量来代表物种的信息量。

According to the characteristics of graphical , we represent a new structure of covariance matrix CM , and then extracted 2-dimensional feature vector from the matrix to represent the amount of information in species .

例如，被应用最广泛的Shannon模型至少有4个缺点：①没有考虑物种间生物量的区别；

For instance , the widely used Shannon model has at least 4 drawbacks : ( a ) it does not give a consideration of the differences of biomass among various species ;

亚洲需求增长之际，由于水产养殖业遭遇瘟疫和饲料成本高企，数个关键物种的供应量偏低。

Rising Asian demand has coincided with low supplies for several key species owing to disease and high feeding costs in the aquaculture industry .

随着沙漠化的进展，群落盖度、密度、物种丰富度、生物量和相邻两个梯度间p多样性指数均呈下降趋势，地上生物量／地下生物量比值变化不大。

With the process of the sandy desertification , the coverage , density , number of species , biomass and diversity index of community decreased . The ratio of biomass aboveground - biomass underground did not changed significantly .

序列比较分析显示：这三个序列与小麦族物种的低分子量谷蛋白亚基基因序列有较高的一致性，可以表明其为低分子量谷蛋白亚基序列。

Multiple sequences alignment suggested that three isolated sequences are homologous of wheat LMW glutenin .

并用热重分析、激光拉曼及透射电镜研究了催化剂表面的积碳物种及积碳量。

TG , Laser Raman and TEM were used to characterize the carbon species and carbon amount .

施氮对退化天然草地主要物种地上生物量和重要值的影响

Effect of Nitrogen Fertilizer on Biomass and the Important Values of the Main Species in Degraded Grassland

浮游动物物种组成、生物量和次级生产力的变化会改变生态系统的结构和功能。

The variations of zooplankton species composition , biomass and secondary production will change the structure and function of the ecosystems .

通过调查吴旗县覆沙黄土区不同时段封禁造林情况，并对此地区植被群落的重要值、物种丰富度、生物量等指标进行分析研究。

The indexes of importance value , species abundance and biomass about vegetation community in sand covered and loess region in Wuqi county in different time-interval are analyzed , through investigating the situation of the closed vegetational type .

沉水植物是湖泊生态系统的重要组成部分，湖泊沉水植物的物种组成、生物量、覆盖面积、空间分布、被利用的方式及程度都直接关系到湖泊环境的整体质量。

Submerged plant is an important makeup in Lake Ecosystem . Species , biomass , mulch area , spatial distribution , fashion and degree used of submerged plant are directly related to the environmental quality of the lake .

中国有着千余年人工贝类养殖史，野生贝类采捕史则更为久远，贝类物种多样，资源量丰富，贝类产业长期以来一直是中国水产业的一个重要组成部分。

China has thousands ' years of history of shellfish culturing , and the history of shellfish capturing is even longer . In China there is a diversity of shellfish species and rich yield . The shellfish industry has always been an important component of fishery .

用生物量计算出来的物种多样性指数与物种多度和物种生物量均匀性这两个因素是正相关的，即物种数越多，生物量平均度越高，则多样性指数越高。

That is , more species contained in a community and more evenly the biomass distributes , the higher diversity is .