Firstly, we would not be alive if there was an eco-system member missing because every one is imporant. For example, trees. If they were missing we can't live because it provides us oxygen.
If species disappeared from an ecosystem the balance in the ecosystem will be altered.
gtyh
You would die.
If ecosystem is decomposed, ecological imbalance will be caused. The ecosystem will be depleted.
ant eaters would die and every thing else will die
I don't believe anything would happen to the ecosystem, as what can scavengers do, but wait for their prey to die? I think the only thing that would happen is for the scavengers to quickly die off, as there would not be enough food for more than the ecosystem can support.
they would die
Wastes would accumulate in ecosystem .
Nothing. You would have to take out a significant number of antelopes to see any changes to the ecosystem.
if the valves failed then the blood would go in the wrong direction.
they would die
you can be speaking to people you dont know