查询词典 decrease in population

According to the above study result, the diversity of microorganisms population in the SUFR system is complex and the bio-community formed in the SUFR system is stable. The close relations between abundance of bacteria and nutrients were found. The correlation between heterotrophic bacteria and COD was 0.949. The correlation between organic phosphate bacteria and TP was 0.815. The correlation between nitrosobacteria and NH3-N was 0.909. The correlation between disnitrifier bacteria and TN was 0.653. These inneglectable great factors effecting on phosphorus-uptake and phosphorus-release of phosphorus accumulating organisms are the influent COD、the concentration of DO、the sludge retention time、the temperature. The diversity of organic phosphate bacteria population in the SUFR reactor was complex and there is no phosphate bacteria taking the absolute superiority in quantity. The near-native pure culture method powerfully complement the traditional pure culture technique and enrich culture technique. The sludgy bioactivity is very good in whole SUFR reactor. By the quality of being biochemistry, the anaerobic phase is higher than anoxic phase and the anoxic phase is higher than aerobic phase of SUFR.

通过以上试验内容研究发现，SUFR 系统中的微型动物种群较多，微生物生态系统稳定；系统中微生物的数量与营养盐的含量密切相关，其中总异养菌与COD的相关系数r 为0.949，有机磷细菌与TP 的相关系数r 为0.815，亚硝化菌与NH4+-N的相关系数r 为0.909，反硝化菌的数量和TN 的相关系数r 为0.653；污水生物除磷工艺中进水COD 的浓度、DO 浓度、泥龄的长短、温度都是影响聚磷菌释磷及吸磷效果的不可忽视的因素；SUFR 系统中的磷细菌呈现种群多样化的趋势，没有占绝对优势数量的磷细菌；微孔滤膜近自然培养法是对传统纯培养技术和富集培养技术的有力补充；整个SUFR 反应器系统中污泥的生物活性很好，就可生化性来讲，厌氧反应器大于缺氧反应器大于好氧反应器；按照动力学方程式求出的细胞生长动力学特征值和SUFR 脱氮除磷系统工艺的实测值结果基本吻合。

The incidence of primary glaucoma in nonselected population of China is 0.52%. In the population with an age over 40years, the incidence in highly to 1-2%.

在我国非选择性人群中，原发性青光眼的发病率是0.52%，年龄超过40岁的人群中，原发性青光眼的发病率高达1.2%。

CO〓 and soil water affected aphid population indirectly through the direct effects on the wheat characteristics. The population increase was due to both high adult fecundity and shortened nymphal period.

3在700ppm范围内CO〓对禾谷缢管蚜的直接影响很小，CO〓和土壤水分对禾谷缢管蚜种群的影响主要来源于间接影响，即通过影响小麦的理化性质进而影响蚜虫的个体行为和种群大小。

There was a stable and relatively low expression level for Lbα1 and a progressive expression pattern for Lbα8 among the 1st,2nd,3rd,and 4th nymphal stages.5 Development and reproduction of L.decolor as a function of temperatureThe developmental rate,survival,intrinsic rate of increase,net reproductive rate(R_0),mean generation time,and population doubling time of L.decolor population were evaluated at eight constant temperatures.

Lb a1在1龄、2龄、3龄、4龄若虫及成虫中的表达水平分别是Lb a8的2.03、2.55、4.77、6.54、和5.28倍，且它们之间的差异均达到显著水平(P＜0.05)。5温度对无色书虱发育和繁殖的影响通过比较无色书虱在不同温度条件下的发育速率、存活率、内禀增长率等生命参数以明确无色书虱在不同温度条件下的发生发展规律。

However in Hachijo population, nymphal development was the fastest under LD 12:12h, followed by LD 14:10h and the slowest under LD 16:8h. Nymphal growth is restrained when the nymphs are transferred from LD 16:8h to LD 12:12h at 60 and 120 days after hatching, rapid development is observed when nymphs were transferred in the opposite direction in Hachijo population.

八丈岛种群的若虫在短日条件下发育最快，其次是中间日长，长日条件下若虫发育最慢，孵化后60d或120d将若虫自LD 16：8h向LD 12：12h转移抑制若虫发育，反方向转移的若虫快速发育。

The effect of temperature on the population growth of Brachionus calyciflorus from the Nanhu Lake was studied at 15, 25 and 35℃ by population accumulative culture. The rotifer was fed with Scenedesmus obliquus at a concentration of 5.0×10^5 cells/mL.

应用群体累积培养法，以浓度为5.0×l0^5 cells/mL的斜生栅藻为食物，研究了温度（15、25和35℃）对南湖水体萼花臂尾轮虫种群增长的影响。

This essay offers an analysis on both the problems caused by usin g permanent residents as the total population quota in the assessment of GDP per c apita and its reasons as well. Amendments are put forward that present populati on be used as the total population quota. Meanwhile, a comparison between the f ormer GDP per capita and amended GDP per capita is provided.

文章对我国人均 GDP核算中用常住人口作为人口总数指标出现的问题及其原因进行了分析，然后提出了用现有人口作为人口总数指标的修正方法，并对修正前后的人均GDP进行了比较分析。

Levels of genetic variation at 11 genic loci in Ostrea edulis have been determined by starch gel electrophoresis and compared between natural population from Ireland and hatched population from Wales.

沈琪用淀粉凝胶电泳检测和比较了采自爱尔兰自然群体和威尔士养殖群体的欧洲牡蛎 Ostreaedulis 11个基因位点的遗传变异。

Considering the bud of Platycarya longipesas basic unit of modular population,the bud population structure of sample trees, which were 8-12 years old and located at different places on slope in karst area in the middle of Guizhou province, was studied.

以圆果化香植株的芽为基本构件单元，对贵州中部喀斯特山地不同坡位上8-12年生植株的芽种群结构进行研究，结果表明：圆果化香芽种群芽总量分配随枝级发生变化，芽数量最多的枝级为树冠中间部位的二级或三级枝，树冠表层的末生枝和紧靠树干的一级枝芽数量较少。

Plutella xylostella Granulosis Virus; life table ; index of population trend ; index of population control

小菜蛾；小菜蛾颗粒体病毒；生命表；种群趋势指数；控制指数

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。