In the presented article it is given information about succession changes appearing in the forest ecosystems during natural and anthropogenic events occurring in forest ecosystems of Azerbaijan Republic. On the basis of statistical data the factors forming the fires on the woodland were researched, the fire areas and its expansion stages were ascertained, the reasons causing fire were revealed, the fire territories were systematically presented on the woodland. At the same time negative cases as a result of human activity caused changes in the vegetation, and it resulted in increase of invasive species. It was determined that during 5-10 years such plants had created 35-40% of succession processes. In the vegetation invasive-detrimental species prevail in the place of useful plants. In some coniferous forests the broad-leaved threes and bushed were formed.