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种群密度

n.population density

种群密度

种群密度

英-汉网络释义

种群密度

n.

1.population density

1

The research resultsshowedthat the population density of rodents fluctuated obviously among different years , but there was no periodicity.

研究结果表明，不同年间啮齿类种群密度波动明显，但无周期性；

3

Three of the cases they studied found that the rise of West Nile virus in the U. S. corresponded to decreases in bird population density .

他们在研究过的三个案例中发现西尼罗河热在美国的的流行与鸟类种群密度的下降相关。

5

The first step was to use some very vigorous sampling-based methods to estimate population densities of herbivores .

第一步就是采用一些有效的取样方法估算食草动物的种群密度。

6

With no natural enemies , their densities reached 10 to 100 times that of Argentina .

因为没有天敌，火蚁的种群密度达到阿根廷的十倍甚至百倍。

8

For one thing , no population can be driven entirely by density-independent factors all the time .

一方面，没有任何种群在所有的时间里完全只受 “种群密度无关 ”因素的影响。

10

Comparative study on clonal and sexual reproductive traits of Leymus chinensis populations in different habitats .

小獐毛种群密度和生物量与有性生殖特征的相关分析。

12

If the population density is too great, the survival rate of mothers and youngs decreases .

种群密度过大时，种群内斗争激烈，母蝎和仔蝎成活率降低。

13

Forested areas sustain almost as high a population as the agricultural sites.

森林区的种群密度几乎与农业区的一样高。

15

The equilibrium population density is equivalent to the carrying capacity K .

平衡种群密度与环境容纳量 K 值相等。

17

Population parameters such as birth and death rates which vary with density are said to be density dependent .

如果种群参数如出生率和死亡率随种群密度的变化而变换，就可以说是密度制约的。

18

Differences in sampling time and population densities had no effect on the spatial distribution pattern of F. occidentalis.

该虫的空间分布型不受种群密度的影响，并且也不随取样时间的变化而变化。

19

Study of the Influence of Different Tending Measures to the Damages and Population Density of Leaf Mites in Bamboo Grove

不同抚育措施对毛竹叶螨种群密度及危害影响的研究

22

Population densities, distribution and conservation of black muntjac in Jiulong Mountain Natural Reserved Area

九龙山自然保护区黑麂的种群密度、分布与保护

23

Influences of Population Density of Plantago virginica on Its Morphological Characters of Underground and Aboveground Organs

北美车前的种群密度对地上和地下器官形态的影响

24

Reflection on the Application of the principle of Density Dependent in Ecological Restoration

种群密度制约原理在生态恢复中应用的思考

26

A investigation on species density and season eat and flow of cockroach in Haimen port

海门口岸蜚蠊种群密度及季节消长调查报告

27

"Labeling and recapturing " method for the determination of animal population density

测定动物种群密度的 “标志重捕法 ”

28

Application of information technologies in monitoring the population density of pests

现代信息技术在害虫种群密度监测中的应用

29

The Population Density of the Giant Panda and the Protection Countermeasure in Yele Natural Reserve

冶勒自然保护区大熊猫种群密度调查及保护

30

The Investigation on Population Density and Seasonal Fluctuations of Cockroach at Changshu Port

常熟口岸蜚蠊种群密度及季节消长情况调查

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