Abstract:
The purpose of this research is to analyze the characteristics of vegetation that
indicated through the Important Value Index and Domination Index of N.larvatus habitat in riparian forest at PT JBG operational area. Analysis of habitat vegetation using the trasect line methods. The transect line had been made by 100 m length and 20 m width. The transect were purposively placed in a location where N. larvatus often use it as a bed tree and as a place for activities. The transect
lines were divided into continuous plots measuring 20 m × 20 m. Importance Value Index (IVI) for seedlings, saplings and poles were dominated by Hibiscus tiliaceus. The IVI for tree species were dominated by Ficus rocemose. The dominance index obtained is low (C <1) or not yet reached the highest value (C = 1), so there is no dominant species in vegetation communities for all level vegetation. The species vegetation that have functions as a source of food and daily activities of N.larvatus were Ficus rocemose, Dillenia borneensis, Hibiscus tiliaceus and Shorea belangeran