trophic level

常见例句

The next best way to quantify the amount of protoplasm in each trophic level is to weigh it .
确定每一个营养阶层原生质总量的第二个好办法是称重。
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The average trophic level of what is being caught is rising -- and this in principle should indicate improving ecosystem health.
食物链等级体系中的高等级物种平均捕获率（而捕获正在并将持续进行）处于持续上升态势之中——按照所谓食物链等级理论，这应当意味着海洋生态系统的健康平衡发生了变化。
The ecosystem appears to be a young weak one caused by overfishing, with small and low-valued fishes dominated and low ecotrophic efficiency for trophic level I.
系统受过度捕捞渔业影响很大，并存在营养级I利用效率低和渔业资源小型化、低值化等不稳定的幼态特征。