Assessing Succession Level Of The Rehabilitation Forest Based On Similarity Index Of Understory Vegetation Communities In The Wanagama Forest

Wanagama Forest is known as a pilot forest formed after rehabilitation program on critical land in Indonesia. Furthermore, most of the plant left grow naturally. Block 5 is an example of close to succession ecosystem. This study was aimed to determine the succession level of some blocks using the index of similiarity of understory vegetation community in Wanagama Forest. Six blocks were choosed as the samples consist of Block 5, 6, 13, 14 and 16, which planted with various trees and left grow naturally. Block 5 was the control of the forest that successfully reaches the succession level. The sample was taken in each blocks with plot used systematic sampling and protocol sampling (Noon, 1981). Vegetation variable proportion on each block showed the diversity of vegetation structure. Generally there were 73 species of plants under canopy, consist of 26 species of seedling, 47 species of shrub and herbs. Block 5 had 28 species of plants under canopy and approximately 40 persen of the species were seedlings. The seedling of Leucaena glauca (Important Value/IV= 42.10) and Streblus asper (IV= 16.99) dominated the area. Block 5 had the most various species and higher canopy cover. The highest Index of Similiarity of undersory vegetation to Block 5 was on Block 7 (CCBlock5= 32.57). Proceeding of International Conference on New Perspectives of Tropical Forest Rehabilitation for Better Forest Functions and Management. Faculty of Forestry Gadjah Mada University 17-19 October 2011. UGM. ISBN 979-9924-66-9