Estimasi Kepadatan Orangutan Sumatera (Pongo Abelii) Berdasarkan Jumlah Sarang di Marike dan Sikundur Kecil Kawasan Taman Nasional Gunung Leuser Sumatera Utara

Abstract

A study of “Density Estimation of Orangutan Sumatera (Pongo abelii) Population Based on Number of Nest in Marike and Sikundur Kecil Gunung Leuser National Park Area, north sumatera” was conducted in August 2010 to January 2011. The purpose of this study is to know the density of orangutan population based on number of its nest. This study was cunducted using the line transect method. The result showed that average number of the nest were found as 100,83 in Marike and 24,33 in Sikundur Kecil with density of population as 2,32 individual/km2 in Marike and 0,56 individual/km2 in Sikundur Kecil. Nest position was dominated by position II (the nest is in the middle or side of branching without using the tree or branch of the other tree) namely 81 nests in Marike and 16 nests in Sikundur Kecil. Choosing the nest based on altitude was found most on >10-15 m namely 58 nests in Marike, while in Sikundur Kecil were found on >15-20 m and >20-25 m as 10 nest for each altitude. Choosing the nest based on tree species were found as 18 families in Marike and 13 families in Sikundur Kecil. Marike was dominated by Lauraceae as 16,76% is more than Dipterocarpaceae and Lauraceae for each family as 13,51%. Sikundur Kecil was dominated by Dipterocarpaceae, Lauraceae, and Meliaceae for each family as 16,67%.

Penelitian tentang “Estimasi Kepadatan Populasi Orangutan Sumatera (Pongo abelii) Berdasarkan Jumlah Sarang Di Marike dan Sikundur Kecil Kawasan Taman Nasional Gunung Leuser Sumatera Utara” telah dilakukan padabulan Agustus 2010 sampai Januari 2011. Penelitian ini bertujuan untuk mengetahui kepadatan populasi orang-utan berdasarkan jumlah sarang. Penelitian dilakukan dengan metode line transect. Dari hasil penelitian jumlah rata-rata sarang diperoleh sebanyak 100,83 sarang di lokasi Marike dan 24,33 sarang di lokasi Sikundur Kecil dengan kepadatan populasi orang-utan sebesar 2,32 individu/km2 di lokasi Marike dan 0,56 individu/km² di lokasi Sikundur Kecil. Posisi sarang didominasi oleh posisi II (sarang berada di pertengahan atau di pinggir percabangan tanpa menggunakan pohon atau percabangan dari pohon lainnya) yaitu 81 sarang di lokasi Marike dan 16 sarang di lokasi Sikundur Kecil. Pemilihan sarang berdasarkan ketinggian ditemukan paling banyak berada pada ketinggian >10-15 m yaitu sebanyak 58 sarang di lokasi Marike, sedangkan di lokasi Sikundur Kecil berada pada ketinggian >15-20 m dan >20-25 m yaitu sebanyak 10 sarang pada masing-masing ketinggian. Pemilihan sarang berdasarkan jenis pohon ditemukan sebanyak 18 famili di lokasi Marike dan 13 family di lokasi Sikundur Kecil. Lokasi Marike didominasi oleh famili Lauraceae sebesar 16,76% yang lebih besar dari famili Dipterocarpaceae dan Lauraceae masing-masing sebesar 13,51%. Lokasi Sikundur Kecil didominasi oleh family Dipterocarpaceae, Lauraceae, dan Meliaceae masing-masing sebesar 16,67%.