It’s not unusual for me to stare into the distance and imagine what Australia looked like two hundred years ago.
The photograph below is of a creek at Arthurs Seat. This creek is relatively natural with a Eucalypt having recently fallen across the channel. Imagine the amount of branches and trees that would fall every year in a natural system two hundred years ago.
Just imagine the three dimensional complexity of the creeks. Decades, if not a hundred years or more of trees and branches falling to the ground, into and over creeks. The diversity of habitats would have been spectacular.