湖水浮游生物（eulimnoplankton）是指生活在比较大而深的淡水湖中的浮游生物。植物多为蓝藻类、鞭毛藻类、绿藻类及羽纹硅藻类等；动物则多为有壳变形虫类、纤毛虫类、轮虫类和枝角类等。扎查利亚斯（O．Zacharias，1898）把它与池沼浮游生物和河川浮游生物加以区别，只称为池沼浮游生物（limnoplankton），但此词也常广义地指淡水浮游生物或是陆地水域的浮游生物。
席弗博士的实验室里堆满了装有湖水浮游生物的样品瓶子。
Dr Sceffer's laboratory is full of bottles containing samples of lake water brimming with plankton.
按照生态学角度来看，湖水当然也很纯净，不过，若按我的说法，那其实更像一锅用浮游生物煮的汤。
The water is pure from an ecological point of view, of course, but it is in fact a kind of plankton soup, as I would call it.
对东湖水库主要营养盐限制因子、水化因子、浮游生物、初级生产力进行了研究。
The main limited factors of nutritive salt, water-chemistry factors, plankton and primary productivity in Donghu reservoir were studied.
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