Lions and Zebras are two of the most competitive predator prey relationships that exist in the grasslands biome.
Cheetahs and Gazelles are also a very important part of the ecosystem.
Both the cheetah and lion help to control herbivore populations by preying on them. Without the predators in the ecosystem, there would be overpopulation of animals including zebras, gazelles, wildebeest, and many others, which would likely cause competition for resources and instability of the ecosystem.