Many theories have been formulated to explain the role of grazers such as zooplankton in controlling the excluded grazers from regions of high phytoplankton concentration.
人们提出了许多理论来解释食草动物，如浮游动物，在控制浮游植物高度集中地区的食草动物方面所起的作用。
2
However, protozoan grazers feed well on phytoplankton in this size range.
但是，在原食草植物吃浮游植物在这个大小范围。
3
Dorpers are none-selective grazers. 100% Yellow-corn straw can be used by Doper, 82% by Boer Goat, 85% by No-horn Doset.