Vegetation Analysis of Stand Trees Composition of Natural Forest of Merapi Volcano National Park

Abstract

Forest is an ecosystem that is yielded from the interaction of biotic and abiotic factors which all the included abundant capital natural resources is the grant from the God both to be preserved and utilized at the longlasting basis. Tropical rain forest compiled of highly kind varieties of plants and plays a very important rule in hydrology and land protection. The purposes of this research to find out the native stand trees composition, to know the native stand trees kind abundance, and to know the spesies association types. This research was conducted at the natural forest of the Merapi Volcano National Park that is administratively located in Hargobinangun Village of Pakem Subdistrict of Sleman Regency of Yogyakarta Special Region Province from May until June 2014. Plot method was applied for the vegetation measurement which was in the various plot size based on the stand tree level with 2.5 percents sampling intensity towarded all the stand trees in the natural forest of Merapi VolcanoNational Park. The Importance Value Index, species variety, and species association calculation was included. The results of this study showed that there were 20 tree types and 20 tree families in the Merapi VolcanoNational Park. The Damar (Agathis damara) species has the highest importance value index at the tree level while the lowest went to Sandalwood (Santalum album) species. The vegetation community as the composer of the natural forest of Merapi VolcanoNational Park had a low level of species variety caused by a small numberNational Park of Mountain of and only had a few dominant species at the tree level.