Judul: Distribusi spasial ikan karang dan hubungannya dengan terumbu karang (Kasus perairan pesisir Bahodopi, Teluk Tolo Kabupaten Morowali Provinsi Sulawesi Tengah)
Abstrak: Reef fish spatial distribution and their assemblages in coral reefs were studied in Bahodopi coastal waters in Tolo Gulf. A total of 2849 individuals from 66 species and 17 families were recorded in 10 stations in the study area covering reef flat and reef slope. Totally 1367 individuals were recorded in the reef flat and 1482 individuals in reef slope stations. Among the three fish groups living in the coral reefs, there found that the most abundant fish were Major and Target fish groups consisting family of Pomacentridae, Acanthuridae, Labridae and Serranidae. Community structure analyses showed that diversity (H’) and Evennes (E) indexes were significantly high according to the categories. The ranges of the two index were 3,61 – 3,69 and 0,82 – 0,93 respectively. Spatial distribution of reef fish in the species level was not significant, but in the level of species groups, the spatial distributions were better. Mayor and target reef fish play an important role in the study area.
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Judul: Linkage Between Reef Fish with Benthic Cover Community at Tunda Island Waters, Banten Bay
Abstrak: Ekosistem terumbu karang merupakan ekosistem yang kompleks yang berperan penting sebagai habitat untuk ikan-ikan kecil, serta sumber mata pencaharian bagi masyarakat pesisir dan pulau-pulau kecil. Ikan terumbu adalah salah satu biota yang hidup di ekosistem terumbu karang dan sangat bergantung pada kondisi terumbu karang. Berdasarkan Perda Kabupaten Serang No. 2 Tahun 2013 tentang Rencana Zonasi Wilayah Pesisir dan Pulau-Pulau Kecil (RZWP3K) Pulau Tunda termasuk dalam pulau yang menjadi bagian dari program pengembangan wisata. Penelitian ini bertujuan untuk mengkaji struktur komunitas ikan terumbu dan kelimpahannya serta keterkaitan ikan terumbu dengan pertumbuhan karang keras di perairan Pulau Tunda, Teluk Banten. Pengambilan data ikan dilakukan dengan metode Underwater Visual Cencus dan pengambilan data terumbu karang menggunakan metode Underwater Photo Transect. Ditemukan sebanyak 13 bentuk pertumbuhan karang keras. Ditemukan total 20 famili, 41 genus, dan 91 spesies dengan total kelimpahan ikan sebesar 124,583±98,25 ind/250m2 individu ikan. Ditemukan total lima trofik ikan yaitu planktivora, omnivora, koralivora, karnivora, dan herbivora. Analisis koresponden (CA) menunjukkan informasi sebesar 61,4 % pada dim 1 dan 24,52% pada dim 2. Ditemukan keterkaitan antara famili ikan karang dengan bentuk pertumbuhan karang keras antara lain famili ikan kecil seperti Pomacentridae, Apogonidae, Holocentridae, Bleenidae, Pinguipedidae, Chaetodontidae, Zanclidae, Pomacanthidae, dan Labridae memiliki keterkaitan dengan karang dengan bentuk pertumbuhan bercabang, Muraenidae memiliki keterkaitan dengan bentuk komunitas bentik yang memiliki celah pada terumbu, serta ikan herbivora dan perenang cepat seperti Acanthuridae dan Scaridae berkaitan dengan bentuk pertumbuhan karang bongkahan besar., Coral reef ecosystem is a complex ecosystem that play an important role as habitat for juvenile fish, also as source of livelihood for coastal and archipelago people. Reef fish is one of biota that live in coral reef ecosystem and also really depend on coral reef condition. Based on Regional Law of Serang Regency No. 2 Year 2013 of Zoning Plan for Coastal Areas and Small Islands (RZWP3K), Tunda island include as island that be a part of tourism development program. The purpose of this study is to study the community structure of reef fish and its abundance also the linkage between reef fish and hardcoral lifeform at Tunda Islands water, Banten strait. Reef fish data retrievel used Underwater Visual Cencus method and coral reef data retrieval used Underwater Photo Transect. 13 hard coral were found. Found total 20 family, 41 genus, and 91 species with average total abundance 124,583±98,25 ind/250m2 individual fish. Found total five trophic level of fish such as planktivore, omnivore, coralivore, carnivore, and herbivore. Correspondent Analysis (CA) result provide information about 61,4% at dim 1 and 24,52% at dim 2. Found linkage between reef fish family with coral reef lifeform such as small fish family such as Pomacentridae, Apogonidae, Holocentridae, Bleenidae, Pinguipedidae, Chaetodontidae, Zancliidae, Pomacanthidae, and Labridae have linkage with branching coral lifeform, Muraenidae have linkage with benthic community that have gap in the reef area, and herbivore and fast swimmer fish such as Acanthuridae and Scaridae have have ingkage with boulder lifeform
Keyword: Ekosistem, Kelimpahan, Tutupan

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