Judul: Perubahan Karbon Tersimpan Atas Permukaan di Daerah Aliran Sungai (DAS) Cidanau Provinsi Banten.
Abstrak: Cidanau watershed is one area which has an important contribution to the economic development in Banten province. DAS Cidanau has great potential to absorb carbon. In the year 2013 – 2014, payment programs for environmental services in DAS Cidanau has been carried out for 5 of forest farmer groups by PT Krakatau Tirta Industri as a buyer of water. The study was conducted to estimate the carbon stock changes due to land cover changes. Land cover changes was analyzed based on timeseries Landsat Imageries using object-based image analysis (OBIA) method. Meanwhile, 5 pools of above carbon stock were measured by allometric equation (undestructive sampling). The result showed that there 12 different types of land cover, namely upland forest, swamp forests, agroforestri, forest plantations, rubber plantations, shrubs, grass marshes, fields, farmlands, open land, housing, and water bodies. In 2000, 2007 & 2014 carbon stocks in DAS Cidanau accounted for 725,455.99 ton, 733,813.02 ton and 751,818.67 ton, respectively.
Keyword: biomass, above ground carbon, land cover change, allometric equation, watershed

Judul: Analisis Debit DAS Cidanau Banten Menggunakan Model SWAT (Soil and Water Assessment Tool)
Abstrak: DAS Cidanau merupakan DAS yang terletak di Provinsi Banten dengan luas 22 049 ha. Penggunaan lahan DAS Cidanau mengalami perubahan setiap tahunnya. Perubahan penggunaan lahan tersebut mengakibatkan perubahan debit di DAS Cidanau. Penelitian ini bertujuan untuk menganalisis perubahan penggunaan lahan dan dampaknya terhadap debit langsung DAS Cidanau, Banten serta mencari alternatif penggunaan lahan yang terbaik. Dampak perubahan penggunaan lahan terhadap debit dianalisis menggunakan model SWAT (Soil and Water Assassment Tool). Alternatif penggunaan lahan bertujuan menurunkan aliran permukaan dengan mempertimbangkan kesesuaian lahan yang ditambah dengan perbaikan pengelolaan penggunaan lahan. Hasil penelitian menunjukkan bahwa perubahan penggunaan lahan DAS Cidanau pada periode 1998−2013 terjadi peningkatan lahan terbangun lebih dari 100% dari 600 ha (1998) menjadi 1 301 ha (2013). Dampak perubahan tutupan lahan selama periode tersebut adalah meningkatnya nilai CN rata-rata dari 78.36 (1998) menjadi 79.00 (2013), meningkatnya aliran permukaan dari 1922.70 mm (1998) menjadi 1959.46 mm (2013), dan meningkatnya koefisen aliran permukaan 0.18 (1998) menjadi 0.38 (2013). Model SWAT yang digunakan berhasil mendapatkan debit dugaan yang baik dengan nilai R² > 0,51 dan NS > 0,74. Hasil simulasi penggunaan lahan terbaik adalah hutan (8.21%), hutan tanaman (14.54%), lahan terbangun (5.81%), perkebunan (5.46%), pertanian lahan kering (9.34%), pertanian lahan kering campur (39.38%), sawah (17.12%), dan badan air (0.14%). Simulasi penggunaan lahan tersebut mampu menurunkan debit maksimal sebesar 0.8 m3/s dan meningkatkan debit minimal sebesar 0.003 m3/s dari debit penggunaan lahan tahun 2013.
Keyword: DAS Cidanau, limpasan permukaan, model SWAT.

Judul: Evaluation of Influenza Antibody Titers in Serum and Egg Yolk of Layers Vaccinated with Influenza Vaccines.
Abstrak: Influenza belongs to the Orthomyxoviridae family which causes upper and lower respiratory tract infection. The aim of this study was to evaluate influenza-A specific antibody titers from serum and egg yolk of hens vaccinated with quadrivalent influenza vaccines. Three Hy-line Brown layers were vaccinated with quadrivalent influenza type A and B inactivated vaccines. Vaccination was carried out three times at a dose of 0.25 ml/chicken via the intramuscular route. The first vaccination was carried out at 24 weeks of age, then boosters were performed at 28 and 32 weeks of age. Serum and egg yolk were collected every week for 20 weeks since the first vaccination. Influenza A H3N2 and H1N1 antibody titers were determined using hemagglutination-inhibition (HI) test and agar-gel-precipitation (AGP) test. Influenza-A H3N2 and H1N1 specific antibodies were detected in both serum and egg yolk from the first to twenty weeks after the initial vaccination. Highest HI geometric mean titer (GMT) of H1N1 antibody reached 26.67 HIU at nine weeks post first vaccination (p.f.v), while H3N2 antibody reached 26 HIU at six weeks p.f.v. Our result showed that influenza antibodies can be produced in layers using quadrivalent vaccines and layer chickens are able to produce equivalent antibody levels for each influenza subtype.
Keyword: antibody, egg yolk, influenza, layer chickens, serum