The trend of dieback and decline of oak forests(Case study: Totshami and Barzeh forests of Kermanshah province)

This study is to monitor the drying and decline of oak trees in four levels of drought in two forest areas (with deterioration and control) of the forest masses of Kermanshah province for three consecutive years. The results of this trend showed that the number of healthy trees decreased from 31 % at the beginning of the study to 10% at the end of the period in the Tootshami sample. This trend is reduced from 45% to 28% in the Barzeh sample (less dryness) and has been transferred to other drying classes. Also, the analysis of the results of dryness with seedling and coppice regeneration trees showed that in the Tootshami sample, 77 % and Barzeh, 65% Copic trees had different levels of dryness. The highest dryness ratio in Tootshami, with 43% related to class (drying up to 50%) and in Baereh, with 52% related to class (Dieback) was observed.