If unmanaged nature does run wild with one or a few species, at some point they overstay their welcome and get rebalanced. The problem being that in the exampl

If unmanaged nature does run wild with one or a few species, at some point they overstay their welcome and get rebalanced. The problem being that in the example I made, this balance is still man-made and not really natural. I.e. if you'd done the same 500 years ago, you'd get a balance with more than a few species. If you'd done the same like 5000 years ago (give or take), things would be even more different because there were still large flocks of wild grazers around. After a few years, that "weed" stops growing and the soil nitrogen levels are more normal. Except the deposition keeps on going, so depends on what 'normal' is the reference compared against.