This delicate ecosystem is home to many flowers, wild horses and bees. Even the smallest thing can put this ecosystem off of balance.
All of a sudden, an invasive specie comes along. This elephant eats all of the plants. There is nothing they ecosystem can do about it. They can adapt to it or live with it for eternity.
Now this ecosystem is just a plain. When the new species comes, and calls it homr, this plain will become a new ecosystem.