"The effect of population density on life satisfaction was therefore more than twice as large for low-IQ individuals than for high-IQ individuals," they found.
他们发现“人口密度对低智商人群在生活满意度上的影响是高智商人群的两倍。”
Plants, especially in population of two years, have bigger bodies in low and middle densities than that in high densities in field. It's the effect of density dependence.
人工种群植株不同密度间个体生长差异显著，尤其是人工二年生种群植株中、低密度区比高密度区个体生长得较大，体现了密度制约的效应。
Individual productivity would be decreased with increasing of density, while the effect of population would be reinforced with it.
在一定范围内，随着密度的增长，降低了个体的生产力，但群体作用有所加强。
Individual productivity would be decreased with increasing of density, while the effect of population would be reinforced with it.
在一定范围内，随着密度的增长，降低了个体的生产力，但群体作用有所加强。
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