Most of tree characteristics such as radial growth and tree height are influenced by climatic change s. Climate change is having important effects on forest dynamics, which can be both positive and negative for natural and managed forests. This study is aiming to assess how the oak forests respond to the changes in environmental conditions and land management activities and focused on Quercus brantii which is the dominant species in Lorestan Oak forest. All the samples have provided in three different management regimes. To do this research, a total of 49 samples have provided in Oak forest in khorramabad, Lorestan, Iran. The first site was Dadabad which has Disturbance site. The second site, Mele-ye shabanan is under agriculture and not been under any special management and tension and is assumed as the Less grazing and Shahanshah (Kargah), the last site has been extremely influenced by height and location of each tree were recorded. The provided cross-sections intensive grazing since decades ago. In each site, the height of tree, slope, aspect, Diameter at breast from different sites were scanned and radial growth was measured by WinDENDRO software. Among that has been developed specifically to measuring and analyzing tree ring width and other tree rings characteristics related to cross-sections and cores. Cross-dating was performed among samples by PAST4 software. Chronology of the sites were prepared by ARSTAN of tree rings was examined. To assess the drought intensity over time and its different provided chronologies, standard chronology had used for further steps. Needed climatic data include mean monthly temperature, total monthly precipitation and drought index en mitigate or exacerbate the response of radial growth to responses to climate change and drought for trees under different land climatic variables and drought. Keywords: Climate change , Radial growth, Dendrochronology, Land management activities , Quercus brantii
