If rabbits can erode australia, immagine what hords of giant grass eaters would do.
Not a completely fair comparison.
The problem is not just that rabbits eat grass and other vegetation. The problem for Australia is the lack of natural enemies to control the rabbit population.
If your gonna say all the animals coexisted at one point you are going to have to expline how HUGE groups of bison and HUGE groups of triceretops didn't eat the landscape dry.
I do agree that you have made a strong case for the absurdity of the YEC position.
said by a creationist: I am saying we always only witness "poofs." Poofs are basic to what consitutes physical reality.