My family has property about 20 minutes outside of the witchita mountains of Oklahoma, zone 6b-7a. I am curious about native trees bushes, etc... that I can incorporate in my existing couple acres of woodland and also my future planting of trees in an open section of the woodland, a lot of the trees are standing dead I not here place and the forest needs young life! I need suggestions please! I am interested in any plant that serves a purpose in helping the forest whether it it be for critters or for humans as well, nitrogen fixing etc.