This results in an increasing concentration of insecticide in organisms at the higher trophiclevels.
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 trophiclevels, 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 "trophiclevels."