I have photographed this tree a zillion times, usually while in my kayak. It stands at the entrance to our cove. I am not sure how it does STAND, because a lot of the roots are exposed.
I can see how the root structure would be a study in itself. Trees seem to like to reach out across the water. I agree it is quite a striking tree this and looks great with the black and white treatment. The reflected trunk really makes this picture extra special.