A forest dynamics model derived from“gap model” was developed to simulate the dynamics of stand composition and structure of Korean pine forest in southern Lesser,Xingan Mountain.The model was run with twelve species growing in the Korean pine forest.species parameters were estimated from silvicultural data at this region.Results simulated to the conifer broad Korean pine secondry forest show that succession coud be divided into tree periods.The first period was less than 70 years,intolerant species domina...