Open Access Research Paper Views (675) Natural Changes in Stand Structure in the Permanent plot of Hyrcanian forests (North of Iran) M. Amini, K.H. Saghebtalebi, R. Amini, S.H. Amini J. Biodiv. & Environ. Sci. 8(5), 62-74, May 2016. Keywords: Beech, Dead wood, Permanent sample plot, Stand, Structure Details