Many ecosystems have been already reduced to:

grass, goat, pig, sheep, cow, person, dog, cat

Currently we catch wild fish to eat. That will cease some day (we'll run out) & we will grow most of our fish in farms.

So.... these are probably the last 100 years of wildlife. Unless people make drastic changes.

Do yourself a disservice browse using Google Earth with satellite view turned on to any location and zoom out. See if you can spot what is left between the mono-culture farmlands.

We have already sterilised much of the earths surface.