Abstract
Hasselt’s litter frogs (Leptobrachium hasseltii Tschudi 1838) is a wide spread species in Java and Sumatra, but there is no specific distribution map for this species. The purpose of this study is to identify the distribution of hasselt’s litter frogs in Java and examine the suitability of it’s using maxent. We used presence data and environment variables consisting of elevation, slope, NDVI (Normalized Difference Vegetation Index), distance from the river, temperature, precipitation, and land cover to evelop the distribution model of this species. Hasselt’s litter frogs in Java depends on forested area with a wide range of elevation (lowland to mountain forests), moderate slope, temperature between 20-21oC and rainfall over 2500 mm/year. The highest number of frogs are found in secondary forest land cover, as supported by NDVI values between 0.8 to 0.9 and relatively close to the river. Habitat model constructed are robust with AUC (Area Under Curve) value of 0.951. Environmental variables that most affectted habitat for hasselt’s litter frog are land cover, temperature, and slope.
Highlights
The distribution of hasselt’s litter frogs in Java and to examine the suitability map of the species by using maximum entropy method
We used presence data and environment variables consist of elevation, slope, NDVI
The highest number of frogs are found in secondary forest land cover, NDVI values between 0.8 to 0.9 and relatively close to the river
Summary
Jenis data yang digunakan untuk data kehadiran termasuk ke dalam data sekunder, yakni data-data dari penemuan katak serasah berdasarkan penelitian sebelumnya. Data variabel lingkungan yang digunakan merupakan data pihak ketiga yang sudah melalui pengolahan awal. Data variabel lingkungan yang digunakan yaitu ketinggian, kelerengan, jarak dari sungai, suhu, curah hujan, NDVI (Normalized Difference Vegetation Index), dan tutupan lahan. Penggunaan jenis data bertipe sekunder maupun dari pihak ketiga berdasarkan. Putri A, Kusrini MD, Prasetyo LB pertimbangan dari segi waktu maupun dana. Tabel 2 memaparkan mengenai jenis data, sumber data, metode pengumpulan data, dan tipe data yang digunakan dalam penelitian ini. Tabel 2 Jenis data, sumber data, metode pengumpulan data, dan tipe data yang dikumpulkan. (2015), Sasikirono (2007), Irvan (2014), Kurniati et al (2001), Kurniati (2002), Kurniati (2005), Irvan (2014), Riyanto A (2010), Eprilurahman et al (2010), dan spesimen MZB
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