HABITAT SUITABILITY MAPPING OF JAVAN GIBBON (Hylobates moloch AUDEBERT, 1798) IN MOUNT SIMPANG NATURE RESERVE AND MOUNT TILU NATURE RESERVE, WEST JAVA

• Main Author: Surya, Selly
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42353
• Institution: Institut Teknologi Bandung

The Minister of Environment and Forestry’s Regulation on Conservation Strategy and Action Plan for the Javan Gibbon (Hylobates moloch) 2016-2026 is a framework for certain conservation programs of the javan gibbon. One of the action plans is designing javan gibbon habitat corridor between Mt. Simpang and Mt. Tilu Nature Reserve. According to the document, information about spatial distribution of habitat suitability is required on designing the corridor. This study therefore aimed at mapping the javan gibbon habitat suitability and providing vegetation information in each habitat suitability class. Habitat suitability index (HSI) was obtained by using Principal Component Analysis (PCA) method in SPSS software which was then used to create the map in Arcmap 10.4.1 software. Coordinates of javan gibbon encounter were required on modelling the habitat suitability. Normalized Difference Vegetation Index/NDVI (X1), elevation (X2), distance from rivers (X3), roads (X4) and cultivated land (X5) were used as determinant variables of habitat suitability. Vegetation analysis using quadrat method, with 10 x 10 m plots for poles and 20 x 20 m plots for tress, was established to get the composition of vegetation in each habitat suitability class. Vegetation data was used to calculate diversity (H’) and importance value index of each species in each habitat suitability class. Modeling results indicated that with formula HSI = [(2,193 x X2) + (2,193 x X4) + (2,193 x X5) + (1,227 x X1) + (1,227 x X3)], HSI values in Mt. Simpang and Mt. Tilu Nature Reserve ranged from 11.49 to 27.09. The index (HSI) classified into low, moderate and high habitat suitability. Tree species in areas with high habitat suitability were more diverse (H’=2.63) than areas with moderate (H’=2.53) and low (H’=1.66) habitat suitability. Areas with low and moderate habitat suitability were dominated by Schima-Castanopsis while the high ones were dominated by Trema-Castanopsis. Mt. Simpang Nature Reserve had a higher propotion of areas with high habitat suitability than Mt. Tilu Nature Reserve, which was 65.11% of its total area.