University of Isfahan Taxonomy and Biosystematics 3115-9001 8 27 2016 06 21 Richness and epiphytic mosses cover variation on ironwood trees (Parrotia persica Pojark) trunks بررسی تغییرات غنا و درصد پوشش خزه‌های اپی‌فیت بر تنه درختان انجیلی 57 70 20980 10.22108/tbj.2016.20980 EN Seyedeh Rahimeh Yavarynik Department of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran Moslem Akbarinia Department of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran Habib Zare Herbarium of Noshahr Botanical Garden, Research Center of Agricultural and Natural Resources of Mazandaran, Noshahr, Iran Journal Article 2016 11 26 This research was conducted to determination and assess changes in richness and cover of epiphytic mosses on ironwood trees(Parrotia persica Pojark) trunks along trunk elevation and slope aspect gradients, in lowland and protected forest of Natural Resource College of Tarbiat Modares University (Parts of western limit of Noor forest reserved). To do this, a number of 20 individual of ironwood trees with a diamerter higher than 40 cm were selected randomly in the study area. A rectangle with 40*30 cm in two geographical directions (Northern and Southern), in 4 height classes (from 0 to 160cm) on the trunks was sampled and related characteristics were recorded. Results of floristic study showed that presence of 17 epiphytic mosses species and the endemic species Palamocladium euchloron among the species with highest presence and Brachytheciaceae family with 7 species were the most important taxa and family in the forest. Richness and cover percentage of epiphytic mosses had the highest averages in northern and lower parts of the trees trunk, this could be due to higher moisture in northern direction and lower parts of the trunk. Result of the study, well clarified the changes of distribution and abundance of the most important forest elements in relationship changes of geographical situation of Parrotia persica trunks.  https://tbj.ui.ac.ir/article_20980_428d0adaeff167fce59db1d93027d908.pdf