There are several Norway Maples growing near 2 Northern Red Oaks in the woods behind my house. It appears that the shallow roots of the maples are growing over and around the oak flares and roots. One seems to be encircling the oak, the other just crossing the oak roots as it grows up the hill toward my house. I have attached pictures. Will those maple roots damage the oaks? Should they be removed? I've been reading about the damage caused by roots girdling a tree when the tree was improperly planted. In this case, the oaks were here long before the maples and none of them were "planted" so I was shocked to see roots from the maple looking like it was girdling the oak. Is there something I should do to keep the oaks healthy? I'm planting other trees and hope to take down some of the maples eventually, but cannot afford to do that now.