I saw a PBS nature episode on keystone species (maybe you did too?), and how they keep ecosystems in balance. Was one of the most interesting documentaries I ev

I saw a PBS nature episode on keystone species (maybe you did too?), and how they keep ecosystems in balance. Was one of the most interesting documentaries I ever saw. Am glad to see that in wolf species actually did help rebalance the ecosystem, really amazing to see the theory in practice!