但是海洋中浮游动物每天的垂直运动——夜里上浮以寻找食物，白天下潜以躲避捕食者——也可以被视作迁徒。
But daily vertical movements by zooplankton in the ocean—upward by night to seek food, downward by day to escape predators—can also be considered migration.
与城市相比大不相同：随着岩石的升高而形成的垂直生态系统内，不同水平生活着不同的动物。
The city comparison isn't far off: different animals live at different levels within the vertical habitat provided by the stone high-rises.
综合分析表明，转双抗虫基因741杨对节肢动物群落垂直结构具有一定的正面效应。
So, transgenic insect-resistance hybrid poplar 741 showed positive effect on vertical structure of arthropod community.
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