查询词典 populations

Based on the investigation of the growth status of gardens plants with the same site conditions, the important values of populations were calculated with the software of ArcMap, the niche breadth of populations were studied using the Shannon-weinne diversity index, Levins niche breadth index and niche overlap.

通过对立地条件类型相同城市的园林绿地植物生长状况进行调查，运用ArcMap软件计算各种群的重要值；采用Shannon-weinne多样性指标、Levins生态位宽度指数和1994年黄英姿提出的生态位重叠计算公式进行种群生态位宽度的研究，将种群生态位理论运用于生态园林建设中。

All populations from east China were grouped into a single Clade, sister to the one comprising all populations from Southwest China.

以粉花绣线菊及其相关类群为例，从种群遗传学角度论述了东亚物理环境异质区的客观实在性及其生物学效应。

The Sichuan, Baojing and Shimen populations composed core clade, and then gathered with the southern and northern populations, respectively, based on the UPGMA analysis.

基于遗传距离的UPGMA聚类中，位于华西的四川居群和中南的保靖和石门居群组成核心分支，再分别与向南和向北的居群聚合。

From the view of population,a major goal of restoration is to rest ore the ability of growth reproduction migration and adaptive evolutionary chang e of populations especially those populations that are dominants or edificators of communities.

摘 要：生态恢复是生态科学的最终实验，从种群角度看，恢复的目标是使种群恢复到具有生长、繁殖和适应进化变化的能力。

Infection by baculoviruses not always results in insect death, and persistent baculoviruses are popular haboured in insect populations. Moreover, the persistent infection can be transformed to a replicative and infective state caused by stress factors, which can cause epizootics in outbreak populations.

杆状病毒感染昆虫宿主并不一定导致昆虫死亡，其持续感染在昆虫种群中普遍存在，且在某些刺激条件下，持续感染可被激活为增殖性感染并引发病毒流行病爆发。

In meiosis of pollen mother cells of the tetraploids and the hexaploids, only bivalents were observed in most of the populations, although in several populations or individuals a few univalents or tetravalents appeared. In the hexaploids, hexavalents were not observed.

四倍体和六倍体的花粉母细胞减数分裂染色体构型在大多数居群都为二价体(四倍体中30个二价体，六倍体中45个二价体)，少数居群或是个体除二价体为主外还出现单价体和四价体，六倍体类型没有出现六价体构型。

We amplified and sequenced TSER in different primates, including hominoids; two subfamilies of Old World monkeys : colobines and cercopithecines; and two species of New World monkeys . Besides in humans, TSER length difference polymorphisms were also found in some primate populations, although in other primate populations, this region has been fixed.

灵长类TSER的进化为了弄清TSER重复结构进化，我们研究了包括人猿超科、猴科的两个亚科疣猴亚科和猴亚科及卷尾猴科的共32个物种的TSER序列变异情况。

Sphaerocephala had more genetic differentiation owing to small populations and universal isolation among populations. 2. It was an effective method to research kinships among species by RAPD.

说明白沙蒿的种群间由于隔离的普遍存在以及种群较小，使种群间产生更多的遗传分化。

During the transformation period of Chinese economy,there are some unfair problems existed between the moving populations' children and the unmoving populations' children at the aspects of the chance of enroll,education process and leaming achievements.

在我国社会经济的转型时期，流动人口的子女教育和流入地常住人口的子女教育相比，在入学机会、教育过程和学业成就等方面都存在着一些不公平的问题。

Comparative study on two levels of population and modules of mutualspecies in the two stations demonstrates that feature index tend to diminish suchas height,tussock amplitude,size,number,density and dry weight;and thegrowth analysis index incline to increase such as RGR、ULA、chlorophyllcontent and effectiveness of plant multi-leaves of the populations and DULA、DUMR、DAGA and DRGRa of the modules;and the dynamic curves of thepopulations and the modules also tend to steadily increase along with thetemperature ascending,heat accumulation and combination between water andheat in moderate-temperature steppe from fierce fluctuation alongside naturalprecipitation in warm-temperature steppe,illustrating that the transformabletendency from increasing the numbers of tussocks and tillers in order to expandthe resource range to seize in warm-temperature steppe to steadily improve drymatter production function of the populations and the modules in moderate-temperature steppe.

两个不同热量型研究站点共有种种群与构件两个水平的比较研究表明：随纬度增加和气温降低，种群与构件高度、丛幅、大小、数量、密度和干重等特征指标趋于降低和减少，而种群RGR、ULA、叶绿素含量和植物多叶性与构件DULA、DUMR、DRGR和DRGRa等生长指标则趋于增加，种群与构件的生长动态曲线也从随天然降水而剧烈波动趋向于随气温升高、热量积累和水热配置状况而稳定增长，说明各共有种从暖温型草原区增加植物种群与构件的大小和数量以扩充资源利用范围向中温型草原稳定地提高种群与构件的干物质生产性能的方面转变的趋势；同时，物质与能量的分配也从较多地投资于繁殖器官产生大量后代以适应未来降水的不可预期变化趋向于同化系统的构建和干物质生产效能的提高以抵御低温和干旱对物种生存的威胁，充分显示出不同温度条件及其水热组合对植物种群形态结构和生长繁育模式的显著影响及其响应特征。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。