discoplankton

例句：

1. 1.Discoplankton are a type of algae that live in the water column.
   浮游植物是一种生活在水柱中的藻类。
2. 2. The ocean is home to many species of discoplankton, which play important roles in nutrient cycling.
   海洋是许多种类浮游植物的家园，它们在营养循环中扮演着重要角色。
3. 3. Discoplankton can help to control the levels of nutrients in the water, which can have beneficial effects on marine ecosystems.
   浮游植物可以帮助控制水中营养物质的水平，这对海洋生态系统有益。