prioritize the degree of degradation forms in forest sites of iran

one of the indicators of management and sustainability control of forest resources is the definition deforestation and degradation types. these factors hazard quantitative and qualitative of the iranian forests. in this study with integrated approach, different forms of forest degradation identified in the forest areas with a reviews of library resources and then investigation the degree of status and priority of them in six sites of forest areas which included of caspian, arasbaran, zagros, irano-turanian, khaleej-omani and mangrove forests with expert analysis method by professors of natural resources faculty, university of tehran. data processing was performed using spss software and friedman test. according to the survey, habitat degradation, generation decrease, forest grass cover, area reduction, soil fertility reduction, forest typology changing, trees quality reduction, stand volume reduction, structure form deformation, fire, pollution, density reduction, reduction of forest canopy, forest dieback, removal of the forest species, forest species changing, forest stratification reduction and height reduction of the stand, in order of priority, are include first to eighteen of degradation forms in forest sites. the main forms of degradation in the caspian site is stand volume reduction, in arasbaran site is habitat degradation, in irano-turanian site is soil fertility reduction, and in the zagros and khaleej-omani sites are changing of structure form and in mangrove site is pollution. these results can be effective in orientation planning and protective management of forest sites for codification of control strategies and inhibiting degradation.