Judul: Keterkaitan Ekosistem Mangrove dengan Keanekaragaman Ikan di Pabean Ilir dan Pagirikan, Pasekan Indramayu, Jawa Barat
Abstrak: Mangrove ecosystem has high productivity because it has the ability as a nutrient trap, which supports aquatic biota, especially fish. The purpose of this study was to determine the relationship between mangrove densities with total fish catch, number of fish species, and fish diversity. The data collections were mangrove condition, fish, physical, and chemical parameters. The results showed that mangrove density in Pabean Ilir Village higher than Pagirikan village. The highest importance value index of mangrove was Rhizophora mucronata and Avicennia marina. Total number of fish catch in two locations were 1093 individuals, consisting of 80 species belonging to 38 families. The dominant fish species were Ambassis nalua, Johnius belangerii, Leiognathus equulus, and Platycephalus indicus. There was positive relationship between the mangrove density with the total number of fish catch, number of fish species, and fish diversity in Pabean Ilir Village and Pagirikan Village, Pasekan Indramayu, West Java.
Keyword: mangroves., Indramayu, fish, Bogor Agricultural University (IPB)

Judul: Hubungan antara Kondisi Mangrove dengan Keanekaragaman Jenis Ikan di Muara Angke, Jakarta Utara
Abstrak: Kegiatan pembangunan yang berdekatan dengan ekosistem mangrove menjadi faktor utama penyebab penurunan kondisi ekosistem mangrove di Jakarta, yang diduga berdampak terhadap ikan yang berasosiasi di dalamnya. Penelitian ini bertujuan menganalisis hubungan antara kondisi ekosistem mangrove dengan keanekaragaman ikan. Pengamatan lapang dilakukan pada bulan Desember 2021 hingga Januari 2022 di kawasan mangrove Muara Angke, Jakarta Utara. Pengukuran vegetasi mangrove dilakukan pada empat stasiun melalui metode transek dengan tiga ulangan, sedangkan pengambilan contoh ikan menggunakan alat tangkap jaring insang yang dilakukan pada waktu pasang dan surut selama tiga hari berturut. Hasil yang diperoleh menunjukkan kerapatan mangrove paling tinggi berada di stasiun empat. Kondisi kesehatan mangrove juga tergolong kategori sedang. Jenis mangrove dengan indeks nilai penting tertinggi adalah Rhizophora apiculata. Total hasil tangkapan ikan dari dua stasiun di lokasi sebanyak 187 individu dengan tingkat keanekaragaman ikan berada pada kategori sedang. Terdapat hubungan positif antara kerapatan mangrove dengan keanekaragaman jenis ikan di Muara Angke, Jakarta Utara., Development activities adjacent to the mangrove ecosystem were the main factors causing the decline in the condition of the mangrove ecosystem in Jakarta, which ultimately affects the associated fishes. This study aims to analyze the relationship between the condition of the mangrove ecosystem and fish diversity. Field observations were carried out from December 2021 to January 2022 in the mangrove area of Muara Angke, North Jakarta. Measurement of mangrove vegetation was carried out at four stations through the transect method with three replications, while fish sampling was carried out using gill nets which were carried out at high and low tides for three consecutive days. The results obtained showed that the highest density of mangroves was at station four. The health condition of the mangroves is also in the moderate category. The type of mangrove with the highest importance value index is Rhizophora apiculata. The total fish catches from the two stations in the location were 187 individuals with the index of fish diversity in the medium category. There is a positive relationship between mangrove density and fish species diversity in Muara Angke, North Jakarta.
Keyword: fish, mangrove, Muara Angke

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition