Salmo,
I as I was trying to say early, man has altered the natural order of things, but tries to pretend we have not. The best example is probably Hersel and the other sea lions. They used a non-natural barrier to decimate a run. Because we hesitated to intervene, and the natural order of things took place, with the run basically bringing the run down to nothing. If the numbers were increased, the sea lions would be back. If we want the run to exist, we need to reduce the predators at the site. If we want the new natural order to take place, then we have ignore the fact that we have altered the site to produce a situation where the run will no exist.