ESTIMASI KEPADATAN ORANGUTAN SUMATERA (Pongo abelii) BERDASARKAN JUMLAH SARANG DI DESA SEKITAR CAGAR ALAM DOLOK SIBUAL-BUALI
Abstract: Sumatran Orangutan
(Pongo abelii) is protected mammal species which existence is now in critically
endangered species category of the International Union for Conservation of
Nature (IUCN). It’s facing a very high risk of extinction in the wild. This
research aimed to estimate Sumatran orangutan density, determined the types of
dominant vegetation used as nesting tree, assest the value and Importance Value
Index (IVI) of trees located in the village of Aek Nabara. This indirect method
was used by counting the number of nests due to the difficulties in finding
Sumatran Orangutans in wild habitat. The area of village is in the border of
Dolok Sibual-buali Natural Reserve, South Tapanuli.
The results of this study indicated orangutan population density was
0,006 individuals/km 2 or 5,994
individuals/10 ha with the total number of 18 nests. Generally the nest was
found at 6-10 meters of tree hight with a sum of 8 nests (44,44%). The highest
of Important Value Index (IVI) was Hoteng species (Quercus gamelliflora
Blume.). The trees which mostly used by orangutans as a nest was Hau Dolok tree
(35,29%).
Keywords: Sumatran Orangutan,
Orangutan Density, orang utan nest, Important Value Index, Dolok Sibualbuali
Natural Reserve
Penulis: Gabriella Junike
Maria Azalia Simanjuntak, Pindi Patana, Erni Jumilawaty
Kode Jurnal: jpkehutanandd150136
