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。
According to the comprehensive trophic level index (TLI), the values of Tangxi reservoir were between 30 and 50. It showed that the reservoir was mesotrophic.
结果表明，汤溪水库综合营养状态指数(TLI)在30 ~50之间，属中营养水平。
The fractions and distribution of bioavailable phosphorus in river sediments were studied in order to identify the trophic level of inflow rivers to the west of Taihu Lake.
为了解太湖入湖河道的营养状况，研究了太湖西部河流沉积物生物利用磷的组成与分布。
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。
Many reports have showed that the transgenic plants have some disadvantages and potential influences on the non-target species, even the higher trophic level organisms, e. g. predators and parasites.
现有一些资料表明：转基因植物对有益生物如天敌尤其是寄生性天敌将产生一些潜在的不利影响。
Many reports have showed that the transgenic plants have some disadvantages and potential influences on the non-target species, even the higher trophic level organisms, e. g. predators and parasites.
现有一些资料表明：转基因植物对有益生物如天敌尤其是寄生性天敌将产生一些潜在的不利影响。
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