一个营养级(trophic levels)是指处于食物链某一环节上的所有生物种群的总和,在对生态系统的能流进行分析时,为了方便,常把每一生物种群置于一个确定的营养...
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...及叶绿素进行光合作用,以制造营养物质,再将此物质提 供不同生物的需求,即消费者,及分解者,而导致营养阶层(trophic level)的形 成。食物链是相当重要的一环,由于食物链的变化产生生物的歧异。
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mean trophic level 平均营养级
high trophic level 高营养层次
macroscopic trophic level 宏观营养级
Trophic State Level 富营养化水平
The biofilms with high trophic level in influent accumulated rapidly,the steady biomass and activity of biofilms were 1.59 and 1.5 times higher.
进水水质不同,基质生物膜的形成时间有差异,进水中相对高的营养水平有利于基质生物膜的积累,60 d内形成的稳定生物膜量相差1.59倍;生物膜活性也较大,平均相差1.5倍。
参考来源 - 复合垂直流人工湿地中基质生物膜的特性Comparative studies on community structure of plankton and zoobenthos were carried out in four lakes with different trophic levels. The results showed that the higher the trophic level of the lake water, the lower the density and biomass of phytoplankton.
对四个不同营养水平的湖泊中的浮游生物、底栖动物群落结构进行了周年调查,浮游植物的密度和生物量与营养水平呈正相关的变化趋势,四个湖泊中浮游植物种类数差异不明显,但各门藻类密度及生物量组成差异明显。
参考来源 - 不同营养水平湖泊浮游生物和底栖动物群落多样性的研究·2,447,543篇论文数据,部分数据来源于NoteExpress
以上来源于: WordNet
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。
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