Judul: Komunitas Herpetofauna pada Ekosistem Sawah di Kabupaten Magelang, Jawa Tengah
Abstrak: Ekosistem sawah sebagai ekosistem lahan basah buatan manusia menyediakan habitat yang sesuai bagi satwaliar liar khususnya amfibi dan reptil (herpetofauna). Keberadaan komunitas herpetofauna di sawah terancam akibat penggunaan bahan kimia secara intensif yang menyebabkan perubahan komposisi jenis dan menyebabkan kecacatan. Tujuan penelitian ini yakni membandingkan keanekaragaman dan kecacatan tubuh herpetofauna di sawah organik dan non organik. Penelitian dilakukan pada bulan Mei hingga Juni 2016 di sawah organik Sawangan serta sawah non organik di Salam dengan metode perjumpaan langsung (Visual Encounter Survey) dan metode pasif jebakan lem (glue trap). Total jenis yang ditemukan yakni 21 jenis herpetofauna dari 9 famili (17 jenis di sawah organik dan 16 di sawah non organik). Nilai kelimpahan tertinggi pada habitat sawah organik (11.28 individu/jam-pengamat). Fejervarya limnocharis dan Eutropis multifasciata merupakan jenis herpetofauna dominan pada kedua lokasi. Indeks keanekaragaman tertinggi terdapat pada sawah organik (H’ = 1.27). Tingkat kecacatan herpetofauna tertinggi dijumpai di sawah non organik.
Keyword: ekosistem, herpetofauna, komunitas, sawah

Judul: Herpetofauna pada Empat Tipe Habitat di Taman Nasional Rawa Aopa Watumohai, Provinsi Sulawesi Tenggara
Abstrak: Taman Nasional Rawa Aopa Watumohai Provinsi Sulawesi Tenggara merupakan salah satu kawasan konservasi penting di wilayah Wallacea. Penelitian ini bertujuan untuk mengidentifikasi keanekaragam jenis herpetofauna, kelimpahan jenis relatif dan kesamaan komunitas herpetofauna di empat habitat berbeda. Pengamatan dilakukan pada Januari-April 2018 menggunakan metode Visual Encounter Survey (VES) berdasarkan waktu dan transek di savana, riparian, hutan dataran rendah, dan mangrove. Didapatkan sebanyak 42 jenis dari 17 famili yang terdiri dari 10 jenis amfibi dan 32 jenis reptil, 9 jenis diantaranya merupakan jenis endemik, contohnya yaitu Hylarana celebensis dan Draco beccarii. Indeks keanekaragaman (H’) dan kemerataan jenis (E) tertinggi terdapat di Hutan Dataran Rendah (H’=2.497, E=0.555). Kelimpahan jenis amfibi tertinggi yaitu Limnonectes modestus sejumlah 85 individu (23.8%), sedangkan kelimpahan jenis reptil tertinggi yaitu Crocodylus porosus sejumlah 24 individu (6.7%). Kesamaan komunitas di keempat habitat tergolong rendah yaitu <0.5, hal tersebut menunjukan jenis yang ditemukan memiliki keunikan pada masingmasing habitat.
Keyword: hutan dataran rendah, keanekaragaman herpetofauna, mangrove, riparian, savana

Judul: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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