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All Journal Jurnal Nusa Sylva Sains Natural: Journal of Biology and Chemistry
Ruskhanidar, Ruskhanidar
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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KARAKTER DAN KERAGAMAN JENIS POHON SARANG ORANGUTAN SUMATERA (Pongo abelii) DI STASIUN RISET SUAQ BELIMBING TAMAN NASIONAL GUNUNG LEUSER Lailan, Infitar; Ruskhanidar, Ruskhanidar; Rahmi, Erdian
Jurnal Nusa Sylva Vol. 22 No. 2 (2022): JURNAL NUSA SYLVA
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jns.v22i2.489

Abstract

The Sumatran orangutan (Pongo abelii) is an arboreal primate that spends all its daily activities in the trees. Nest-making activities are carried out daily, selecting trees with certain characteristics to make nests. Much research has been done on the character of orangutan nest trees. However, there needs to be more information about the character of orangutan nest trees at the Suaq Belimbing Research Institute, Gunung Leuser National Park. It is known that Suaq Belimbing is a peat swamp forest ecosystem in Gunung Leuser National Park, precisely in Kluet, South Aceh, with quite diverse vegetation composition. Even so, not all vegetation is used as orangutan nest trees. This study aims to obtain data on the characteristics of orangutan nest trees in the Suaq Belimbing peat swamp forest habitat of Gunung Leuser National Park. Data was collected for three months using the line transect method. The results of the study obtained 65 individual trees used as orangutan nests. 45.15% of the nest tree characters had a height of 11-20 m, and 24.46% had a trunk diameter of 31-40 cm. The most widely used crown shape for making nests was cylindrical.
Buffer Zone Development for The Sustainability of Gray Langur in The STIK Jantho Aceh Besar Educational Forest Rosmalia; Aswita; Ruskhanidar, Ruskhanidar
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 4 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i4.779

Abstract

The silver langur (Trachypithecus cristatus) is a primate species protected by law. Its conservation status is listed as Vulnerable in the IUCN Red List data and Appendix II status in CITES. The very sharp decline in the gray langur population is due to declining habitat quality and poaching. The STIK educational forest is a secondary forest, which is disturbed by illegal logging and forest encroachment for community gardens and forest fires. The population data include group sixes and structures were not know well number of groups and individuals in the gray langur is not yet known. The age structure and sex ratio of the gray langur are also not yet known. The composition of the food trees of silver langur in this area is also not yet known. There is no data on those silver langur in the STIK Jantho educational forest. This study aims to obtain data on the gray langur in the STIK Jantho educational forest, including the number of groups, the number of individuals, the age structure, and the sex ratio of the gray langur. Data collection in this study used the line transect method by recording the number of groups, the number of individuals, the age structure, and the sex ratio. Data analysis using Arch GIS 10.1 to determine the distribution of gray langurs by plotting each coordinate obtained, using GPS visualized in the form of a map. Determination of gray langur density using the formula: P = D x A. Found 1 group of Gray langurs (Trachypithecus cristatus), with a total of 10 individuals. The age structure of gray langurs in HP STIK Jantho is included in the developing age category and has a complete composition (Male, adult female, infant, and juveneel).
Co-Authors Aswita Lailan, Infitar Rahmi, Erdian Rosmalia