You need to learn about trophic cascades. Here's a quick intro: https://www.youtube.com/watch?v=ysa5OBhXz-Q https://www.youtube.com/watch?v=ysa5OBhXz-Q This p

You need to learn about trophic cascades. Here's a quick intro: https://www.youtube.com/watch?v=ysa5OBhXz-Q https://www.youtube.com/watch?v=ysa5OBhXz-Q This played out in the Pleistocene extinctions to a very significant degree, having tremendous effect on ecosystems everywhere. Here's an entire conference worth of the subject: http://www.eci.ox.ac.uk/events/2014/megafauna-conference/index.html http://www.eci.ox.ac.uk/events/2014/megafauna-conference/ind...