Judul: Studi Autekologi dan pengaruh invasi akasia (Acacia nilotica) (L.) Willd. ex Del. terhadap eksistensi savanadan strategi penanganannya di Tamana Nasional Baluar Banyuwangi Jawa Timur
Abstrak: Tujuan yang ingin dicapai dari penelitian ini adalah untuk: (a). Mengetahui autekologi meliputi; siklus hidup, fenologi, produksi biji, pemancaran biji, dan struktur tagakan A. nilotica di Taman Nasional Baluran, (b). Mengetahui derajat invasi A. nilotica di Taman Nasional Baluran dan upaya yang telah dilakukan), (c). Mengetahui pengaruh invasi A. nilotica terhadap komposisi spesies, Indeks Keanekaragaman Spesies (H'), Indeks Similaritas (IS), asosiasi spesies, biomasa tumbuhan bawah dibandingkan dengan daerah yang belum terinvasi A. nilotica.
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Judul: Understory Vegetation Diversity and Forage  Plants Availability in Bekol and Balanan Savanna, Baluran National Park
Abstrak: Akasia berduri (Vachellia nilotica) adalah salah satu tumbuhan yang berada di Taman Nasional Baluran yang bersifat invasif dan memengaruhi komposisi savana di kawasan tersebut. Penelitian bertujuan mengetahui keanekaragaman spesies tumbuhan bawah, sifat invasif dan mengkaji spesies pakan satwa yang mampu berkompetisi pada lingkungan penelitian. Pengambilan data analisis vegetasi didapatkan dengan metode kuadrat. Plot utama dengan ukuran 50 m × 50 m dibuat pada tiga kawasan, yaitu kawasan savana terinvasi rendah, tinggi, dan bebas invasi. Setiap plot utama dibuat 15 petak contoh yang berukuran 1 m × 1 m. Parameter tumbuhan bawah yang diamati adalah jumlah individu dan spesies. Pada savana terinvasi rendah ditemukan sembilan spesies dari tujuh famili dan pada savana terinvasi tinggi ditemukan sembilan spesies dari enam famili. Nilai indeks keragaman jenis (H’) pada savana Balanan invasi rendah bernilai 1,62 dan pada invasi tinggi sebesar 1,74, sedangkan pada savana Bekol yang terbebas invasi sebesar 1,24. Vegetasi yang menyusun ketiga kawasan cenderung berbeda dengan nilai indeks kesamaan Sorenson (IS) sebesar 4.05 hingga 14.65. Jumlah spesies pakan pada kawasan invasi tinggi lebih rendah dibandingkan dengan kawasan lainnya., Thorny acacia (Vachella nilotica) is one of the invasive plants species in Baluran National Park (BNP) which affects the vegetation composition in its savanna. This study aims to determine the diversity of understory species and its invasiveness, as well as to examine the availability of forage plant species that are able to compete with the other understory species in the research plot. This study was conducted in three areas that is high invaded, low invaded, and uninvaded areas from V. nilotica. The vegetation composition was described by vegetation analysis. Main plot with a size of 50 m × 50 m has been made in three areas with five replicate plots were selected for each location resulting in total of 15 plots were studied. The uninvaded area has the highest number of understory species compare against the high invaded and low invaded areas. The value of the species diversity index (H') in high invaded, low invaded, and uninvaded areas are 1,74; 1,62; and 1,24 respectively. The understory composition within the three areas were tends to be different based on Sorenson Similarity Index (IS) with a range of values 4.05 to 14.65. The high invasion area has the lowest number of forage plants species compared to other areas.
Keyword: animal feed, invasion, quadrat method, Vachellia nilotica, vegetation analysis

Judul: Membran Komposit Kitosan-Zeolit untuk Aplikasi Direct Methanol Fuel Cell
Abstrak: Direct methanol fuel cell (DMFC) is a fuel cell that utilize methanol as the fuel source. The electrolyte membrane used in the DMFC system in this research was chitosan-zeolite composite membrane. The composite membrane was synthesized with chitosan-zeolite composition variation of 1:1, 1:2, 1:3, and 2:1. The membranes were analyzed by Fourier transform infrared spectrophotometer (FTIR) and scanning electron microscope, and for the specific gravity. Membrane performances were tested with methanol uptake, methanol permeability, conductivity, and potential difference in the DMFC system. The FTIR spectrum showed no formation of new functional groups inducating that the composite membrane was a result of physical mixing. Morphological analysis showed that the membrane was nonporous. Chitosan-zeolite 1:3 composite membrane had the highest specific gravity and methanol uptake, 1.4226 g/mL and 41.44%, respectively. The highest proton conductivity was showed by the 1:2 chitosanzeolite composite membrane, namely 7.2946× 10-7 S/cm. Based on this research results, chitosan-zeolite composite membrane can be applied in DMFC system.
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