Judul: Estimasi Serapan Karbon Mangrove di Desa Pasar Banggi, Rembang, Jawa Tengah
Abstrak: Desa Pasar Banggi merupakan salah satu desa yang berada di Kabupaten Rembang yang memiliki potensi mangrove di wilayah pesisirnya yang memiliki peran penting dalam penyerapan karbon. Penelitian ini bertujuan menentukan kemampuan mangrove dalam menyerap besarnya karbon. Penelitian ini dilakukan di Desa Pasar Banggi, Rembang, Jawa tengah pada bulan Februari 2021. Biomassa karbon dihitung menggunakan persamaan alometrik dan dikalikan dengan stok C agar diperoleh serapan karbon mangrove. Hasil penelitian menunjukkan bahwa kerapatan mangrove tertinggi sebesar 9767 ind/Ha. Jumlah tegakan pada lokasi penelitian berbeda di setiap stasiun. Biomassa memiliki hubungan positif dengan serapan karbon mangrove. Nilai biomassa tertinggi yaitu 514,33 ton/ha dan terendah sebesar 150,25 ton/ha. Besar kecilnya serapan karbon pada sedimen dipengaruhi oleh substrat mangrove. Substrat berlumpur memiliki kemampuan lebih tinggi dalam menyimpan karbon karena memiliki pori-pori yang lebih kecil jika dibandingkan substrat berpasir. Mangrove di Desa Pasar Banggi memiliki serapan karbon sebesar 882,96 ton/ha dan simpanan karbon sedimen sebesar 11039,30 ton/ha.
Keyword: Serapan Karbon Mangrove, Biomassa, Sedimen

Judul: Cadangan Karbon Tegakan Mangrove di Desa Pasar Banggi Kabupaten Rembang, Jawa Tengah
Abstrak: Mangroves are usually used as a prevention of coastal erosion and the fish farming (ponds). Ecologically mangrove has potential as carbon stocks. Mangroves that located in Pasar Banggi Village Rembang Regencyhave a function as conservation area. There are four types of mangroves such as Rhizophora mucronata, Rhizophora apiculata, Sonneratia alba, and Avicennia marina. The purposes of this study are to calculate the biomass,the carbon stocks and CO2 sequestration estimation using per tree method and midpoint diameter calculation method. The result showed that the value of the biomass, carbon stocks, and CO2 sequestration consecutively are 81.274 ton/ha, 38.199 ton/ha, dan 140.190 ton/ha. The use of midpoint diameter calculation method can not be applied to find out the value of the biomass, carbon stocks, and CO2 sequestration in mangrove of Pasar Banggi Village Rembang Regency because it has a significant difference.
Keyword: Bogor Agricultural University (IPB), estimation, CO2 sequestration, carbon stocks, biomass, mangrove

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