The question of whether the decrease in plant fecundity caused by the spraying of pesticides actually causes a decline in the overall population of flowering plant species still remains unanswered.
喷洒杀虫剂导致的植物繁殖力下降是否真的会导致开花植物物种总数的下降，这个问题仍然没有答案。
He used aphid fecundity data to elucidate the theoretical effects of antibiosis on insect population dynamics.
他利用蚜虫繁殖力资料说明了抗生作用对虫口动态的理论效应。
The level of infection by gregarines was also a strong predictor of mean fecundity of females at the inter-population level.
在不同种群间，寄生感染程度也是一个有力的指示量，可以预示雌性个体的生育力变化；
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