epiplankton

例句：

1. 1.Epiplankton are the base of the food chain in aquatic ecosystems.
   浮游生物是水生生态系统食物链的基础。
2. 2. The epiplankton play a crucial role in nutrient cycling.
   浮游生物在营养物质循环中起着至关重要的作用。
3. 3. During the spring bloom, the epiplankton population increases dramatically.
   春天开花时，浮游生物数量急剧增加。