دسته بندي جوامع گياهي مراتع ييلاقي حوزه آبخيز و از مازندران

Ordination of plant communities at rangelands of "Vaz" in province of Mazandaran

The rangelands of "Vaz" with 5150 hectar extension is in the Chamestan region of Mazandaran province. Twenty plant communities distincted at the rangelands by using of physiognomic-floristic method.The relationship between plant communities determined by using of ordination and calculation of Gleason similarity index, with considering of quantity amounts (frequency-cover). Location of each plant community on axes determined by Beatʹs method and relationship of them has showed in the dimension place. Results explain that plant communities (specially numbers 7and 8)are distincted by some different charactristics such as cover, frequency, stratification and diversity.