KARAKTERISTIK DAN PEMILIHAN POHON TIDUR BURUNG NURI TALAUD (Eos histrio Muller, 1776) DI PULAU KARAKELANG - KEPULUAN TALAUD SULAWESI UTARA

Diah Irawati Dwi A, Dr. Satyawan Pudyatmoko, S.Hut, M.Sc

2014 | Tesis | S2 Ilmu Kehutanan

Penelitian bertujuan mengidentifikasi lokasi, karakteristik pohon tidur, dan faktor dominan pemilihan pohon tidur serta populasi spesies burung Nuri Talaud. Penelitian dilaksanakan selama 4 bulan di Pulau Karakelang Kepulauan Talaud. Distribusi pohon tidur diperoleh dari pengamatan lapangan dan data sekunder yang kemudian digambarkan dalam peta menggunakan aplikasi SIG. Empat belas variabel digunakan untuk menggambarkan karakteristik pohon tidur dan pohon random, analisis data menggunakan statistik deskriptif, uji Mann-Whitney, uji-T, uji Chi-square dan regresi logisik. Populasi dihitung dengan metode roost suvey. Hasilnya teridentifikasi sebanyak 11 pohon tidur, 6 pohon yang masih digunakan dan 5 sudah ditinggalkan. Distribusi lokasi pohon tidur pada penelitian ini menunjukkan lokasi Desa Ammat dan Binalang memiliki jumlah pohon tidur paling banyak yaitu tiga pohon. Pohon tidur berdasarkan jenis teridentifikasi sebanyak empat jenis yaitu Gehe (Pometia corriaceae Radkl), Binsar (Ficus variegata Blume), War’ro (Duabanga moluccana Blume) dan Lawean (Sterculia sp.). Karakteristik variabel kuantitatif menunjukkan pohon tidur yang digunakan memiliki tinggi pohon 31–46 m; TBC 16,8 – 36,0 m; DBH 57,3 – 114,7 cm; diameter tajuk 5,1–8,4 m; % tutupan tajuk 8 – 43%; kerapatan pohon sekitar pohon tidur diameter 20–40 sebesar 25–175 ind/ha; kerapatan pohon sekitar pohon tidur diameter > 41 cm sebesar 0–50 ind/ha; suhu 24,8 – 29,8 oC; kelembaban udara 70–97%; ketinggian tempat 113 – 398 m dpl; kemiringan lahan yaitu 2 – 11%; jarak terdekat dari sumber air 0,2–1,2 km; sumber gangguan 0,8 – 4,7 km; tepi hutan adalah 0 – 2,2 km. Variabel yang paling dominan berpengaruh adalah tingggi bebas cabang. Populasi Nuri talaud sebanyak 2.227 individu.

This study aimed to identify factors that strongly influenced the selection of roosting tree by the Red and Blue Lories birds and to estimate their recent population using roost survey method. The study lasted for four months at Karakelang Island. The location distribution was obtained from direct observation and from the previous reports described on map using GIS. The data were analyzed using descriptive statistic method, T-test, Mann-Whitney test, Chisquare test and Logistic Regression. The results showed that eleven roosting trees were found. Among them, six trees were still being used by the birds but the others had been abandoned. From the results of the location distribution, Ammat and Binalang villages had the highest number of roosting trees (3). Four kinds of roosting trees were identified; those were Pomtia corriaceae Radkl, Ficus variegata Blume, Duabanga moluccana Blume, and Sterculia sp. The characteristics of quantitative variables of roosting trees being used had the tree height ranging from 31-46 m, clear bole height 16.8-36.0 m, diameter at breast height 57.3-114.7 cm, canopy diameter 5.1-6.4 m, percentage of canopy coverage 8-43%, tree densities with stem diameter 20-40 and >41 cm were 25-175 and 0-50 trees per ha, respectively, air temperature 24.8-29.8oC, RH 70-97%, altitude 113- 398 m asl, slope 2-11%, distances to the nearest water source, disturbance source 0.8-4.7 km, and forest edge were 0.2-1.2 km, 0.8-4.7 km, and 0-2.2 km, respectively. Among those variables, the most influencing variable was clear bole height. The population of the birds in 2014 was 2.227.

Kata Kunci : Nuri Talaud, Pulau Karakelang, pohon tidur, populasi, distribusi