Judul: Pengaruh Luasan dan Jarak dari Daerah Inti pada Area Terfragmentasi Terhadap Keanekaragaman Herpetofauna
Abstrak: Herpetofauna are vulnerable to habitat changes and deforestation because most of the herpetofauna need specific habitat type. The purpose of this research is to assess the relationship between size and distance from core areas to fragmented area to diversity of herpetofauna. Survey was carried out for 14 days (September - October 2012) using VES method (Visual Encounter Surveys) combined with patch sampling for specific microhabitat. A total of 36 species of herpetofauna (22 species of amphibian and 14 reptiles) was found, in which index Shannon-Wiener for amphibians (H’) in all types of habitats ranged from 1.39 to 2.57, which is mean low diversity. Diversity index of reptiles in all types of habitats ranged from 0.56 to 2.04, it means low to moderate diversity. Fragmented area, especially those with water source are mainly used as microhabitat and able to support herpetofauna life. There is a relation between size of fragments, distance fragments to core area and habitat characteristics to number of individuals and species of herpetofauna. Higher size of fragmented area has richer diversity of species and higher number of individuals. In summary, distance of fragmented areas to core areas affects the diversity of herpetofauna
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Judul: Pengaruh Daerah Peralihan terhadap Distribusi Herpetofauna di Kawasan Tambling Wildlife Nature Conservation, Taman Nasional Bukit Barisan Selatan, Provinsi Lampung
Abstrak: Edge effect is tendency of differences in species composition or abundance of the transition area and core area. Tambling Wildlife Nature Conservation Area (TWNC) is part Bukit Barisan Selatan National park. TWNC area consists of various types of habitats which are expected to affect composition, diversity and distribution of herpetofauna in the area. Research was carried out to determine differences in species composition, species diversity and distribution between the transition area and core area. Research was carried out in Tambling Wildlife Nature Conservation and Laboratory of Environmental Analysis and Modelling of Spatial Faculty of Forestry IPB, in August 2009-January 2010. Amphibian and reptile were collected using Visual Encounter Survey (VES) with transect design method in coastal forests, lowland forests, gardens, transition area between the coastal forest and lowland forest as well as the transition area between the garden and lowland forest. Total amphibians found are 19 species. All species of amphibians are found along transects. There were 33 species of reptiles, consisting of 18 species found in transects and 15 species outside transects. Herpetofauna species composition differs among habitat types, as well as between transition area and core area. In core area, lowland forests have the highest number of amphibian species (14 species), followed by garden (8 species) and coastal forest (3 species). Lowland forests and coastal forest have the same number of species (10 species) of reptiles and garden (8 species). Number of species in transition area is 5 species of amphibians and 2 species of reptiles between coastal forest and lowland forest and 2 species of amphibians and 2 species of reptiles between garden and lowland forests. Differences in habitat type did not influence the value of species diversity index except for number of individual. More amphibians are found in low land forest area whereas reptile is found more on coastal forest. Spatial distribution of amphibian tends to congregate in lowland forest area consisting more micro habitats, close to fresh water source and protected from dessication. Reptile tends to distributed randomly due to its higher mobility that amphibian. Lower number of herpetofauna found at the transition area compared to core area, show that edge effects is negatively impacted the distribution of herpetofauna especially in fragmented area.
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Judul: Pembuatan Film Tipis Lithium Niobat (LiNbO3) Menggunakan Metode Chemical Solution Deposition (CSD) dengan Variasi Kecepatan Putar (Rpm).
Abstrak: Film tipis merupakan salah satu aspek yang mendapat perhatian sangat besar dalam bidang material, karena film tipis merupakan material menarik yang memiliki sifat optik yang sangat tergantung pada konstanta dielektrik, indeks bias, dan energi gap. Lithium Niobat (LiNbO3 ) dapat digunakan sebagai pelapis pada film tipis karena memiliki sifat piezoelektrik, electrooptical, pyroelectrical dan photorefractive yang sangat baik. Film tipis Lithium Niobat (LiNbO3 ) ditumbuhkan menggunakan metode Chemical Solution Deposition (CSD) dengan variasi kecepatan 3500 rpm, 5000 rpm, 6500 rpm, dan 8000 rpm. Metode ini memiliki keunggulan dapat mengontrol stokiometri film tipis dengan kualitas yang baik, prosedur yang mudah dan membutukan biaya yang relatif murah. Energi band gap yang dihasilkan dari film tipis Lithium Niobat (LiNbO3) berkisar antara rentang 2.1 eV – 2.8 eV dengan indeks bias berada pada rentang 2.18-3.2. Film tipis LiNbO3 memiliki parameter kisi a=b=5.54Ǻ dan c = 16.35 Ǻ. Struktur morfologi film tipis adalah permukaan yang homogen dan ukuran kristal berada pada rentang 0.417 μm – 0.680 μm.
Keyword: sifat optik, litium niobat, chemical solution deposition, kecepatan putar