If the turtles in the world all became extinct?

If a mountain lion became extinct. How would that affect the environment/world?

• If a mountain lion became extinct. How would that affect the environment/world? Thanks for your answers!

• Answer:

  For one, all of its prey species would like increase in numbers. If deer numbers increased without predation holding it in check they would overgraze and prevent young trees from growing. This would be very detrimental to the environment and the prey populations.