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。
Producers are often referred to as being in the first trophic level and are called autotrophs by the heterotrophs.
生产者通常被称为第一营养级,被异养称为自养。
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。
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