Studi Altitudinal Vegetasi Pohon dan Pole serta Potensi Karbon Tersimpan di Jalur Pendakian Sigarang-Garang Hutan Gunung Sinabung, Kabupaten Karo

Abstract

A Study of the altitudinal study tree and pole and potential carbon storage in Sinabung mountain has been conducted from January until Juni 2013. Research conducted by using plot method place purposive random sampling at research location with increas elevation. Sampling has been made by using 10x10 meters belt transect. Every 100 m elevation level, were taken 20 sample plot so that up to 1700-2000 above sea level totalize plot were 60.The research areal study consist of three location, Location I (1700-1800 m above sea level), Location II (1800-1900 m above sea level) and location III (1900-2000 m above sea level). Measured parameter cover density, frequency, dominancy, Important Value Index (IVI),Diversity Index (H'), and Evenness (E). Analysis of profile diagram was done with software auto cad and analysis carbon storage was done with allometrik equation by brown. Based on this study, it is found that 52 species, from 41 families consisting of trees and pole were collected from the plots. Aglaia sp, Lithocarpus sp.1 and Mycromeles corimbifera were three spesies with highest important value index (IVI) on tree and on pole the highest important value index found at Aglai sp, Eugenia operculata and Mycromeles corimbifera.The species diversity index (H’) tree were 2,98 (Location I), 2,79 (Location II) and 0,79 (Location III), spesies diversity Indeks (H’) pole were 2,72 (Location I), 2,41 (Location II) and 1,64 (location III). The value of eveness indeks on tree were 0,87 (Location I), 0,92 (Location II) and 0,44 (location III). Eveness value indeks of pole were 0,87 (Location I), 0,85 (Location II) and 0,79 (Location III). Carbon Storage of trees achieved its highest values in Location I (141,98 t/ha) and contributed to total carbon storage of 65,05% and Carbon storage of pole achieved its highest value in location II (6,33 t/ha) and contributed to total carbon storage of 39,7%.

Kajian tentang studi altitudinal pohon dan pole serta potensi cadangan karbon tersimpan di Gunung Sinabung dilakukan mulai Januari sampai Juni 2013. Penentuan lokasi Penelitian dengan menggunakan metode Purposive Sampling pada setiap ketinggian tempat. Pengambilan sampel dengan menggunakan plot berukuran 10 x 10 m. Setiap 100 m kenaikan ketinggian tempat dibuat 20 plot penelitian sehingga dari ketinggian 1700-2000 mdpl diperoleh total plot sebanyak 60. Penelitian dilakukan pada tiga lokasi, lokasi I (1700-1800 mdpl), lokasi II (1800-1900 mdpl) dan lokasi III (1900-2000 mdpl). Parameter yang diukur meliputi Frekuensi, Dominansi, Indeks Nilai Penting (INP), Indeks Keaneka ragaman (H’) dan Indeks keseragaman (E). Diagram profil dianalisis dengan menggunakan software Auto cad dan Karbon tersimpan dianalisis dengan menggunakan persamaan allometrik yang dikemukakan oleh Brown. Berdasarkan penelitian ditemukan 52 spesies dari 41 famili yang termasuk dalam kategori pohon dan pole yang dikoleksi dari plot penelitian. Aglaia sp, Lithocarpus sp.1 dan Mycromeles corimbifedra adalatiga spesies yang memiliki Indeks Nilai Penting (INP) tertinggi pada tingkatan pohon dan pada pole indeks Nilai Penting tertinggi ditemukan pada jenis Aglaia sp, Eugenia operculata dan Mycromeles corimbifera. Indeks keaneka ragaman jenis pohon diperoleh 2,98 (Lokasi I), 2,79 (lokasi II) dan 0,79 (lokasi III), indeks keaneka ragaman jenis pole diperoleh 2,72 (lokasi I), 2,41 (lokasi II) dan 1,64 (lokasi III). Nilai indeks keseragaman pada pohon diperoleh 0,87 (lokasi I), 0,92 (lokasi II) dan 0,44 (lokasi III). Indeks keseragaman pada pole diperoleh 0,87 (lokasi I), 0,85 (lokasi II) dan 0,79 (lokasi III). Karbon tersimpan tertinggi pada pohon diperoleh pada lokasi I (141,98 t/ha) dan berkontribusi 65,05% dari total karbon tersimpan dan karbon tersimpan pole tertinggi ditemukan pada lokasi II (6,33 t/ha) yang berkontribusi 39,7% dari total karbon tersimpan.