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All Journal Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati
Witono, Joko R.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Catatan Baru Persebaran Pinang Gajah (Nenga gajah J. Dransf.) (Short Communication) Witono, Joko R.; Sutrisno, Sutrisno; Astuti, Inggit Puji
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 9, No 3 (2004): October 2004
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.807 KB) | DOI: 10.24002/biota.v9i3.2917

Abstract

Sumatra merupakan salah satu pulau besar di kawasan Malesia Barat yang memiliki keanekaragaman palem yang tinggi. Menurut Uhl & Dransfield (1987), di Sumatra terdapat 26 marga palem, salah satu diantaranya adalah Nenga. Nenga terdiri atas 5 jenis, yaitu Nenga gajah, N. pumila, N. banaensis, N. macrocarpa, dan N. grandiflora (Fernando, 1983). Kelima jenis tersebut tumbuh pada daerah hutan hujan tropika pada ketinggian antara 0-1.400 m dpl. Daerah persebarannya di Asia Tenggara mulai Thailand, Semenanjung Malaya, Sumatra, Jawa, dan Kalimantan. Satu-satunya jenis Nenga yang dinyatakan sebagai jenis endemik, sekaligus langka adalah Nenga gajah (WCMC, 1996) karena populasinya yang sangat rendah dan terancam oleh aktivitas perladangan liar dan perluasan kebun kopi rakyat.
Analisis Vegetasi Beberapa Fragmen Hutan di Kabupaten Timor Tengah Utara Poleng, Aloisius; Witono, Joko R.
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 9, No 1 (2004): February 2004
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.247 KB) | DOI: 10.24002/biota.v9i1.2835

Abstract

The present  study aims to describe vegetation composition and structure of fragmented areas in Timor Tengah Utara. The study was carried out in three locations : the small forest of Soeb Mountain (L1), the medium forest of Ainiut-Loeram (L2), and the large  forest of Lapeom-Maubesi Mountain (L3). The data were collected using the quadrates method. Each transect is 0,52 ha and thirteen plots (20x20 m) was established. The results show that the number of trees species in the large forest is the highest followed by the medium and the small forests (L3>L2>L1); The tree density in the large forest is the highest, followed by the small and the medium forests (L3>L1>L2). However the highest tree basal area was recorded in the small forest, followed by the large and the medium forests (L1>L3>L2). The species of the highest importance value (IV) at three locations are Pterocarpus indicus Willd., Gossampinus malabarica (DC.) Merr., and Schleichera oleosa (Lour.) Oken.
Co-Authors Inggit Puji Astuti Poleng, Aloisius Selvi Marcellia