Well, they adapt of course, and so do we. But with the way we used our intelligence we stepped over all boundaries for how Earth takes care of itself, and us. Manipulating Earth to fit our needs. We never needed one as long as we were inside those boundaries. And most of you still think we are.
We don't have a precautionary principle. and the reason why is simple. This Earth was big enough, and diverse enough, to let us act this way. Animals doesn't have precautionary principles more than those imprinted in them.