Herbal Species Diversity around of Logs and Snags in Sardabrood Forests, Chalous

In order to investigate of diversity of herbal species with respect to dead and downed trees, Sardabrood forests were studied that are located in Mazandaran province. In order to do this research, circles plots with radius of 5 meter in around of snags and rectangular plots with 4 meter widths (2 meter both parties of logs) and equal to theirs lengths in around of downed trees were designed. Herbal species and covering percent were identified and recorded, respectively. Also, in a 20 - 30 m distances from dead trees were selected number 2 to 3 mother trees of same species, D. B. H. and height. The composition of herbal species in different sites showed that dead trees site had more presence of Rubus caesius, Phylitis scolopendrium, Carex acutiformis, Oplismenus undulatifolius and Pteridium aquilinum but the site of mother trees were including Euphorbia amygdaloides, Oplismenus undulatifolius and Asperula odorata. Also, results of this research showed that the most value of Simpson and Peet indices devoted in snag and the least were found in around of mother tree and downed trees, respectively. Around of mother tree and snags had the maximum and minimum of richness, respectively. Analysis of variance showed no significant differences between plant diversity in different sites.