7 海洋浮游生物

这是斯匹克-沃克尔拍摄的浮游生物显微照片。拍摄时采用了莱因伯格照明法，凭借有色盘提供的鲜艳色彩，使快速移动的浮游生物在明亮蓝色调下清晰可见。

海洋浮游生物是非常小的有机生物，漂浮在海面上，很少或不具备移动能力。海洋浮游生物分为两大类型：浮游植物和浮游动物。浮游植物是植物性浮游生物，在海面以下较浅的水深漂浮，依靠光合作用获得能量；浮游动物是包括小型原生动物和多细胞动物在内的动物，它们主要以浮游生物为食。

Another image by Spike Walker shows plankton. In this image he uses Rheinberg illumination, whereby coloured discs are used to provide vibrant colours, making fast-moving plankton visible against a brilliant blue background.

Plankton are small organisms, plant or animal, that drift in the sea with little or no locomotive ability. They are split into two main categories: phytoplankton, which are plant plankton that drift close to the surface and rely on photosynthesis for energy; and zooplankton, which are animals and include small protozoans or metazoans that normally feed on other plankton. (Image: M. I. Walker) [NewScientist]