Studying the Acclimation of Quercus brantii Lindl (Case study: Chaharmahal and Bakhtiari)

Iranian west oak is the most important and most abundant tree species in the climate zone of Zagros region. This study is done with aim to determine the climatic characteristics of the habitat of this species in Chaharmahal and Bakhtiari. So, 56 climatic variables that were important in distribution of this species have been selected in the terms of ecological situation. The variables were extracted from synoptic and climatology stations which the stations managed by Weather Organization of Iran. To reduce the number of variables and determining effective factor was used factor analysis using by principal components analysis with varimax rotation, then the average factor scores in the habitat of this species and the areas without it were calculated and the spatial distribution of the factor scores were plotted in Surfer ver12. The results of the factor analysis identified three factors of precipitation, heat temperature and wind that these factors are included 28.79%, 20.13% and 4.71%, respectively and 95.80% of the total variance of the data. Generally, the results showed that precipitation factor with threshold of 435 mm in downstream areas and 9.8 degree centigrade temperature in high lands are determined the upper boundary of this specie, therefore, regard to acclimation of Quercus brantii, these valuable species may be developed in a significant area of province