How could the jackrabbit population suddenly increase?How might this affect the ecosystem?

If there was a lot of breeding, then the population would increase and this would affect the ecosystem in two ways, there would be less vegetation since the jackrabbits would be consuming more, and the other way it would have an affect is that the predators of jackrabbits would suddenly have more food, meaning there could be an increase in predators, and an increase in predators would affect the jackrabbit population negatively if they’re all being eaten