这通常会使收集到的个体数量增加，并吸引其他难以捕捉的物种。
This often increases the number of individuals collected and attracts species that are otherwise elusive.
因为每个个体的生命都是短暂的，“机会主义者”这类物种的群体数量很可能受到干旱、严冬或者洪水等不利因素的影响。
Because each individual is short-lived, the population of an opportunist species is likely to be adversely affected by drought, bad winters, or floods.
稀缺性不仅仅由某个物种所包含的个体数量决定，还和物种的数量有关。
Rarity is not merely determined by the number of individuals in a species, it is also about how unusual that species is.
但若某方案目的是拯救某个物种而非该物种中所有个体，它将允许上述疾病传播数量多于一，从而减少需要接受疫苗的狼群数量。
A programme that sought to save a species rather than individuals would allow each infected Wolf to pass the disease on to more than one healthy animal and hence require fewer vaccinations.
由于个体种化石的的数量统计随着时间的推移而变化，研究生物灭绝的古生物学家们更倾向于对称为类的有相互联系的整个物种种群进行统计研究。
Rather than counting individual species of fossils,which vary over time, palaeontologists who study extinction usually countentire groups of related species, called genera.
论个体物种的数量，据推测，它们有6百万- 1千万种。
The number of their individual species is estimated to be 6-10 million.
总群落的个体数量变化受基位物种营养层的个体数量变化影响较显著。
The individual numbers of arthropod community were affected by those of basal species.
沟谷热带雨林群落结构和功能(光合生产)的稳定性是以多个物种种群以及各层次中个体数量的相对稳定来维持的。
The stability of structure and function (photosynthesis production) of the ravine tropical rain forest is maintained by a lot of tree populations, and relative constancy of individuals in each layer.
沟谷热带雨林群落结构和功能(光合生产)的稳定性是以多个物种种群以及各层次中个体数量的相对稳定来维持的。
The stability of structure and function (photosynthesis production) of the ravine tropical rain forest is maintained by a lot of tree populations, and relative constancy of individuals in each layer.
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