查询词典 decrease in population

From the laboratory population, it seems that when the krill shrink, the crystalline cone number does not decrease.

从活体培养的结果来看，当南极磷虾身体出现负生长时，磷虾复眼中的晶椎数目保持不变，即晶椎数目不受负生长的影响。

We also conclude that the equilibrium of the prey population will be enlarged due to the Allee effect of the predator, but the Allee effects of the prey may decrease the equilibrium value of the predator, or that of both the predator and prey.

如果捕食者受Allee效应的影响，则猎物种群在平衡点的密度将增大；但是猎物的Allee效应将同时减小捕食者和猎物在平衡点的密度，或者减少捕食者在平衡点的密度。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

为了能总观集合种群进展的全局并开展进一步的工作，首先对集合种群的已有概念、理论和模型做了全面的分析和总结；其次对集合种群的发展和概念进行了探讨，以集合种群模型的中心框架：Levins的斑块占据模型为基础，展开对其它原理、效应和机制的探讨；主要包括了Levins原理，即当生境进到破坏时，空斑块比例在集合种群灭绝前保持不变，然后还分析了Allee效应（集合种群的Allee效应主要是由于建群困难和扩散损失造成的）；第三，分析了援救效应：迁人个体可以降低斑块中现有局域种群的灭绝风险，援救效应会增强集合种群的生存力，使空斑块比例下降第四，探讨了两竞争集合种群的共存机制，即竞争－侵占妥协，其共存机制为空间生境中物种共存提供了有力的理论解释。

Furthermore the high mortality of mid-aged individuals resulted in the decrease of seeds and seedlings, which caused the decline of population viability.

中龄级个体的高死亡率，直接影响到种子的产生和幼苗的形成，是导致种群生存力下降的主要原因。

The presence of the phantasms will decrease unrest and increase income and population in all provinces of the Nation .

这些幻像的存在将能降低省份的不满，同时增加各地的收入并帮助人口成长。

Results: We observed that the total outpatient frequencies of all diseases in this population increased from 20,411 times in the half-year pre-earthquake to 23,103 times in the one-year post-earthquake and slightly decrease to 21,401 times in the 1.5-year post-earthquake.

压力已确定是引发糖尿病的诱因，而造成压力的因素很多，地震只是其中之一，如果我们将地震引发的糖尿病称为&地震糖尿病&，其带来的结果将令人啼笑皆非。

From the laboratory population,it seems that when the krill shrink,the diameter of the compound eye does not decrease.

雌性磷虾的眼径与体长之间的关系为：ED＝0.5898e0.0282BL（r＝0.9613，n＝2419）；雄虾的眼径与体长之间的关系为：ED＝0.544e0.0309BL（r＝0.9622，n＝1920）。

So as to sustain the fast-increasing population, agriculture must be intergrated to decrease the use of agrochemical.

为了养活迅速增长的人口，农业必须集约化，这就会不断增加农用化学品的用量。

"We are making concerted efforts to decrease the population at Guantanamo," said Navy Cmdr.

&我们正在采取协调一致的努力，以减少人口在关塔那摩的，说：&海军惩罚。

In this research, the writer learns from the angle of the population, the sociology, the ethnology, pay attention to many academicses to cross a comprehensive research, full in consideration of Guizhou is a big minority national province, emphasize the influence of the nation traditional culture upon the birth population character.

在本研究中，笔者结合自已的研究方向，注重多学科交叉综合研究，充分考虑到贵州为少数民族大省的省情，强调民族传统文化对出生人口素质的影响。

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。