Forest stand dynamics were evaluated in a previously managed Quercus-Carya-dominated forest inventoried in 1980 and 2000, a period during which all active forest management was suspended and fire suppression was complete. The diameter distribution superficially resembled a stable unevenaged structure. Over the course of the study, smaller diameter classes were increasingly dominated by shade tolerant species Acer saccharum and Fagus grandifolia across all landscape positions. Diameter distribution changes varied among Quercus species with Q. alba and Q. rubra basal area increasing 63 and 45%, respectively, and Q. velutina decreasing 25% in the >43.2 cm size class. Combined Q. alba, Q. rubra and Q. velutina density decreased 56% in the <27.9 cm size classes. Transition towards a mesophyte-dominated forest is occurring across all positions in this topographically-diverse landscape, although more slowly on the drier, less productive aspects and slope positions. These changes are comparable to those ...