Judul: Carbon Stock Estimation of Mangrove in Pramuka Island, Kepulauan Seribu
Abstrak: Ekosistem mangrove merupakan salah satu ekosistem yang dapat menyerap emisi gas sehingga dapat menjadi upaya dalam mitigasi pemanasan global. Pulau Pramuka merupakan salah satu pulau di Kepulauan Seribu yang memiliki ekosistem mangrove yang sangat luas sehingga memiliki potensi untuk menyimpan karbon. Penelitian ini bertujuan untuk mengetahui banyaknya stok karbon serta banyaknya karbon yang terserap pada area mangrove di Pulau Pramuka, Kepulauan Seribu, DKI Jakarta pada tegakan dan sedimen. Pengambilan sampel menggunakan metode non destuktif dengan melakukan pengukuran diameter pohon mangrove setinggi dada (DBH) pada 4 stasiun dan menggunakan pipa akrilik untuk mengambil sedimen. Perhitungan biomassa mangrove pada atas dan bawah permukaan menggunakan persamaan alometrik. Analisis karbon tanah menggunakan metode Walkey & Black. Hasil penelitian menunjukkan estimasi potensi stok karbon mangrove di Pulau Pramuka adalah sebesar 345,06 tonC/ha. Kawasan mangrove di Pulau Pramuka mampu menyimpan karbon pada sedimen sebesar 63,86 tonC/ha. Kata kunci: emisi, karbon, mangrove, Pulau Pramuka, Mangrove ecosystem is one of the ecosystems that can absorb gas emissions so that it can be an effort in mitigating global warming. Pramuka Island is one of the islands in Kepulauan Seribu that has a very extensive mangrove ecosystem that has the potential to store carbon. This study aims to determine the amount of carbon stock and the amount of carbon sequestered in mangrove areas on Pramuka Island, Kepulauan Seribu, DKI Jakarta in stands and sediments. Sampling using non destructive method by measuring the diameter of mangrove trees at breast height (DBH) at 4 locations and using acrylic pipes to take sediments. Calculation of mangrove biomass above and below the surface using the allometric equation. Soil carbon analysis using the Walkey & Black method. The results showed that the estimated potential of mangrove carbon stock in Pramuka Island was 345,06 tonsC/ha. The mangrove area on Pramuka Island is able to store carbon in sediments amounting to 63,86 tonsC/ha. Keywords: carbon, emissions, mangrove, Pramuka Island
Keyword: stok karbon

Judul: Biomass and Carbon Stock Mangrove and Pandan Laut Ecosystems (Pandanus tectorius) on North Pari Island, Seribu Islands, DKI Jakarta
Abstrak: Kenaikan suhu atmosfer saat ini telah menjadi isu hangat bagi seluruh dunia yang di sebabkan karena peningkatan konsentrasi karbon dioksida (CO2) dan berdampak pada perubahan iklim. Analisis nilai biomassa stok karbon yang tersimpan dilaksanakan pada 20 November – 26 November 2023 di Utara Pulau Pari, Kepulauan Seribu DKI Jakarta dari 5 titik pengamatan yang berbeda, yaitu 3 pengamatan di ekosistem mangrove dan 2 pengamtan di ekositem pandan laut. Pengambilan sampel dilakukan dengan menggunakan metode plot lingkaran. Pengukuran stok karbon dan biomassanya hanya didasarkan atas diameter batang. Nilai biomassa yang di dapat dibandingkan untuk menentukan lebih banyak manakah CO2 yang diserap untuk mengurangi emisi CO2 di kedua ekosistem pesisir. Ekosistem mangrove memiliki serapan karbon CO2 lebih besar daripada ekosistem pandan laut yaitu sebesar 1407 ton CO2/ha dan 10 ton CO2/ha, dikarenakan jumlah diameter dan jenis spesies yang ditemukan saat dilokasi lebih banyak dan mendominasi ekosistem mangrove daripada pandan laut yaitu sebesar 163 ind dan 26 ind., The rise in atmospheric temperature has now become a hot issue for the whole world caused by an increase in carbon dioxide (CO2) concentrations and an impact on climate change. Analysis of the value of stored carbon stock biomass will be carried out on November 20 – November 26, 2023 in the North of Pari Island, Seribu Islands DKI Jakarta from 5 different observation points, namely 3 observations in mangrove ecosystems and 2 observations in pandan laut ecosystems. Sampling is carried out using the circular square transect method. The measurement of carbon stocks and biomass is based only on the diameter of the rod. Biomass values can be compared to determine where more CO2 is absorbed to reduce CO2 emissions in both coastal ecosystems. Mangrove ecosystems have greater carbon CO2 absorption than pandan laut ecosystems, which are 1407 tons CO2/ha and 10 tons CO2/ha, because the number of diameters and types of species found when located is more and dominates mangrove ecosystems than sea pandanus, which is 163 ind and 26 ind.
Keyword: biomassa, mangrove, stok karbon, pandan laut, Pulau Pari

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