if the Ark was real then the post flood world would be populated by the creatures off the ark.
The bible says there were seven pairs of the clean and two of the unclean. It doesn't say what clean/unclean were.
it follows the clean would dominate over the unclean.
I believe this is why the post flood world was different in fauna over the pre flood one.
the pre flood seems by the fossil record to have been a unclean dominance.
The post flood world would be quickly populated by all the creatures.
yet today or in historical memory not all the creatures were everywhere.
so one must look into the fossil record. post flood, to see if all creatures were everywhere.
this is what is found.
So we must conclude post flood disasters destroyed creatures in many lands leaving only what they left.
We live today in a poverty world regarding fauna.
only the fossil record shows the great diversity after the flood.