TY - JOUR ID - 3804 TI - The effects of roadside on composition of tree communities in forests of West Guilan Province, Iran JO - Caspian Journal of Environmental Sciences JA - CJES LA - en SN - 1735-3033 AU - Zamani, Marziyeh AU - Nikooy, Mehrdad AU - Pourbabaei, Hassan AU - Naghdi, Ramin AD - Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran Y1 - 2019 PY - 2019 VL - 17 IS - 4 SP - 305 EP - 317 KW - Road age KW - Diversity KW - Forest road KW - SIV DO - 10.22124/cjes.2019.3804 N2 - Forest roads are one of the main affecting factors on diversity and composition of plant species. This study aimed to investigate the effects of forest road on composition of tree communities of forests in west of Guilan Province, Iran. Therefore, in two age classes (0-10 and 10-20 years old) of forest roads with five different distances from the road edge, totally, 240 sample plots (150 square meters) were taken by line transect method. The results showed that the relative importance of Fagus orientalis, Quercus castaneifolia and Acer velutinum trees on roads with lower age (0-10 years old) was higher than those with higher age (10-20 years old). The results also indicated that on the newly-constructed roads, the presence of pioneer species (Alnus subcordata and A. cappadocicum) became lower than the other species by moving from the roadside into the forest. In this study, the species importance values of A. subcordata, A. cappadocicum, and A. velutinum decreased from roadside to the forest interior. The results also showed that the Simpson’s diversity and evenness indexin old roads were higher than the young ones. The results of ANOVA analysis showed that by increasing distance from the road, the species diversity and richness declined, while species evenness elevated. The results indicated that there are higher dead trees on the roadside (0-30 and 31-60 m) compared to the inside of forest. UR - https://cjes.guilan.ac.ir/article_3804.html L1 - https://cjes.guilan.ac.ir/article_3804_08669f65888155a346c9100a1757228e.pdf ER -