Floristic and chorological study of plants in east and southeast side of Shahdezh mount, Sari and Mazandaran

The results of vegetation studies may be useful in solving ecological issues such as biological conservation and natural resource management, and by assessing vegetation information, future trends can be predicted. Mount Shahdezh with 2803 meters, the highest mount in Sari city, it is located in 80 km of southeast of Sari city and north of Semnan in the Chahardangeh section. Vegetation samples were collected from 5 stations in the region. Identification of plants was done based on available resources in the herbarium of Mazandaran University and with the help of experts available. Choreological studies of species according to their area of distribution was determined using these sources and geographical segmentation of Iranian vegetation. A total of 87 plant species were identified in 70 genera and 34 families. Comparison of the number of family, genera and species in the plant groups. The present study showed that dicot plant and then monocot plant had the highest number of family, genera and species. From the chronological point of view, the largest proportion of the flora belongs to the pluriregional elements (33.3%), Iran-Turanian species with 19.6% and followed by European - Siberian / Iran - Turanian / Mediterranean species with 18.5%, respectively, were the most abundant. Based on lifestyle segmentation, the identified plants were more humid or hygrophytic (58.6%) and water-derived (32.2%). Life forms determined by Raunkiaer method were included hemicryptophytes with 30% highest and hydrophytes with 3% lowest. The abundance of hemicryptophytes in the studied area is more than other biological forms, which indicates the existence of a cold, dry and mountainous ecosystem. Also, the decrease in the abundance of trophytes in the highlands compared to the low slopes can be due to the more destruction of the slopes compared to the heights.