EFEKTIVITAS PENGGUNAAN TIGA INDEKS KEANEKARAGAMAN POHON DALAM ANALISIS KOMUNITAS HUTAN: STUDI KASUS DI TAMAN NASIONAL GUNUNG GEDE PANGRANGO, INDONESIA

Abstract

The analysis of diversity is a fundamental measurement in a forest community. The results of the analysis can be the basis for conservation actions in the management of a forest area. Several species diversity indices such as the Shannon-Wiener and Simpson's index are very commonly used in the analysis by the ecologist. However, comparative studies on tree diversity indices with continued analysis of the effectiveness of using these indices are still rarely conducted. Using data from 26 plots located at an altitude range of 1.013-3.010 m, a comparison of the effectiveness of the use of the Shannon-Wiener, Simpson's, and rarefied richness index was carried out on woody plants (dbh ≥5 cm). It was grouped into three zones, namely the submontane zone, montane and subalpine. The results showed that rarefied richness index has a good performance and more sensitive than that of Shannon- Wiener and Simpson’s indices. Therefore, we recommend using a rarefied richness index for further research on tree diversity analysis. Converting previous Shannon-Wiener, Simpson’s, or combination of both indices into rarefied richness is widely open. However, linear models show that the equations only capture 61-87% of the total variation of the indices, depend on the independent variable used in the model.