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1·This results in an increasing concentration of insecticide in organisms at the higher trophic levels.

这就导致在更高营养级上的有机体中，农药的浓度增加。

2·Hunting food behavior of natural enemy depends on information from various trophic levels, especially chemical information.

天敌搜寻食物的行为依赖于来自不同营养阶层上的信息，化学信息起重要作用。

3·Since the late 1990s, scientists and regional management organisations have used catch data to measure changes in the balance of species across so-called trophic levels.

自1990年代起，科学家和区域性管理机构就已经开始了数据收集工作，通过对“食物链等级”上不同种群间的生态平衡变化进行定量研究。

4·The phenomena shows that the interaction between different trophic levels of natural enemy-insect and pest-plant is undoubtedly of important ecological and behavioral significance.

这种同步迁移现象无疑具有重要的生态学和行为学意 义，表现出“天敌—寄主—植物”不同营养层之间的相互作用。