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Andriwibowo Andriwibowo
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Other

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Journal : ZOO INDONESIA

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LANDSCAPE ECOLOGY OF ENDEMIC BLACK-WINGED STARLING Acridotheres melanopterus tricolor (HORSFIELD, 1821) RELATED TO ENVIRONMENTAL FACTORS IN A TROPICAL SAVANNA OF INDONESIA Andriwibowo Andriwibowo; Katherine Hedger; Adi Basukriadi; Erwin Nurdin
ZOO INDONESIA Vol 31, No 1 (2022): Juli 2022
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52508/zi.v31i1.4229

Abstract

The black-winged starling (Acridotheres melanopterus tricolor) is a bird species in Southeast Asia, and this species still exists within Indonesia's tropical savanna landscape. This study aims to estimate the population density of the A. m. tricolor and to model the relationship between this species density and its environmental factors in several land cover types in the Baluran National Park savanna landscape in Java. The environmental factors were Normalized Difference Vegetation Index (NDVI), land cover size, and distance to river obtained from Landsat 8 Operational Land Imager (OLI) and analyzed using Geographical Information System (GIS). General Additive Models (GAM) combined with Principal Component Analysis (PCA) was used to analyze the correlation of bird density with environmental factors. Based on the results, the average density of the A. m. tricolor was eight (8) inds./km2. The correlation model showed a significant positive relationship between bird density and NDVI and a significant negative relationship for distance to river factors, while land cover size did not significantly correlate with the bird density. These findings suggest that vegetation and access to water sources remain a relatively important environmental factors for supporting A. m. tricolor populations and this species conservation in the tropical landscape. The novelty of this research is satellite imagery and GIS usage to elaborate the landscape and habitat of A. m. tricolor. In addition, this study also contributes to modelling the most overarching environmental factors of A. m. tricolor in Indonesia's tropical savanna landscape.
APPLICATIONS OF CONVEX POLYGON AND KERNEL DENSITY ANALYSES TO MODEL THE HOME RANGES OF EQUATORIAL SPITTING COBRA Naja sputatrix (BOIE, 1827) IN GREEN AREAS OF UNIVERSITAS INDONESIA CAMPUS, WEST JAVA Andriwibowo Andriwibowo; Adi Basukriadi; Erwin Nurdin
ZOO INDONESIA Vol 31, No 2 (2022): Desember 2022
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52508/zi.v31i2.4464

Abstract

Naja sputatrix (Boie, 1827) or known as equatorial spitting cobra is one of venomous snake inhabiting wide green areas include Universitas Indonesia Campus. Currently the existence and conservation of cobra is threatened, then it is important to study cobra possible home ranges. This research is aiming to model the home range of equatorial spitting cobra in green areas of Universitas Indonesia Campus. The model was developed using the applications of Convex Polygon and Kernel Density. The Convex Polygon analysis shows that approximately 114.53 Ha or equals to 35.79% of green areas of Universitas Indonesia Campus was the home ranges of the cobra. While, based on the Kernel Density analysis, it confirms that up to 307.65 Ha or equals to 96.14% of green areas of Universitas Indonesia Campus were potentials as the home ranges of the cobra. Then it can be concluded that at least 30-90% of green areas of Universitas Indonesia Campus should be conserved to support the presences of N. sputatrix.
Co-Authors Adi Basukriadi Aldri Frinaldi Erwin Nurdin Katherine Hedger