Study of conservation effects on some vegetative factors Case study: Gelokan watershed of Varjin protected area

Distinguishing of protected areas is one of the range management methods for improvement, sustainable development and richness of plant composition. This research was carried out to study the effects of conservation on some vegetative factors in some parts of Varjin located in Tehran province and protected since 1982. For this purpose, two vegetation types were selected in protected area as well as unprotected area. Four transects of 300 m length were then established in key areas of each vegetation type and 10 plots of 1m2 were sampled along each transect with 30-m intervals. In each plot, list of species was recorded and vegetative factors including density, composition and yield (cut and weighting method) were measured. All samples were weighted in wet and dry condition. Normality of data was tested and then measured parameters were compared by t test. Results showed that mean difference for all measured parameters in vegetation type of (Me Pe – As br) except vegetation composition of class III species and density of class II and III species were significant. Also in vegetation type of (Fe ov – As br), all parameters were significant except density of class I and class III species.