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: Community Structure of Reef Fish in Coral Reef Ecosystem on Tidung Island, DKI Jakarta
Abstrak: Ekosistem terumbu karang merupakan ekosistem produktif untuk perikanan dan organisme akuatik lainnya. Ekosistem terumbu karang menjadi habitat vital bagi komunitas ikan khususnya ikan terumbu. Ikan terumbu adalah komponen penting di lingkungan perairan, keberadaan komunitas ikan terumbu pada ekosistem terumbu karang penting untuk diketahui, karena peran dan fungsi secara ekologi ikan dalam menjaga kestabilan komunitas terumbu karang dan keseimbangan komponen penyusun ekosistem terumbu karang lainnya. Penelitian ini bertujuan mengetahui struktur komunitas ikan terumbu di Pulau Tidung. Penelitian ini dilakukan di Pulau Tidung pada tanggal 9 - 12 Juni 2022. Metode pengambilan data ikan terumbu menggunakan Underwater Visual Census (UVC) dengan transek 50 meter, dan diletakkan tiga transek di setiap stasiunnya. Data ikan terumbu dianalisis dengan tiga indeks komunitas, yaitu indeks keanekaragaman, indeks keseragaman, dan indeks dominansi. Hasil penelitian ditemukan 3982 individu ikan terumbu, 24 famili dan 91 spesies. Komposisi ikan indikator sebesar 2,44%, target 17,20%, dan ikan mayor sebesar 80,36% dari total individu yang ditemukan. Nilai rata-rata indeks keanekaragaman 2,77, keseragaman sebesar 0,88, dan dominansi 0,08. Nilai ini menunjukkan bahwa kondisi komunitas ikan terumbu di Pulau Tidung tergolong baik, stabil, dan tidak ada dominansi antar spesies., Coral reef ecosystems are productive ecosystems for fisheries and other aquatic organisms. Coral reef ecosystems are vital habitats for fish communities, especially reef fish. Reef fish are important components in the aquatic environment, the existence of coral fish communities in coral reef ecosystems is important to know, because of the ecological role and function of fish in maintaining the stability of coral reef communities and the balance of other components of coral reef ecosystems. This study aims to determine the structure of the reef fish community on Tidung Island. This research was conducted on Tidung Island from 9 June to 12 June 2022. The reef fish data collection method uses Underwater Visual Census (UVC) with a 50 meter transect, and placed three transects at each station. Reef fish data were analyzed with three community indices, namely diversity index, uniformity index, and dominance index. The results of the study found 3982 individuals of reef fish, 24 families and 91 species. The composition of indicator fish is 2,44%, target is 17,20%, and major fish is 80,36% of the total individuals found. The average value of diversity index is 2,77, uniformity is 0,88, and dominance is 0,08. This value indicates that the condition of the reef fish community on Tidung Island is good, stable, and there is no dominance between species.
Keyword: Community structure, reef fish, Tidung Island, Underwater Visual Census

Judul: Katalis Eterifikasi Gliserol Berbasis Poli–(asam stirena sulfonat) dari Limbah Styrofoam.
Abstrak: Styrofoam waste can be converted to poly–(sulfonate styrene acid) (PSSA) that can be used as catalyst. The objective of this research is to get PSSA that can catalyze the etherification of glycerol and benzyl alcohol. The styrofoam waste was converted to PSSA by reacting with H2SO4 98% (as sulfonation agent) and P2O5 (as sulfonation catalyst) at 40 °C for 6 hours. Characterizations of PSSA included functional groups, sulfonation levels, water swelling, and thermal stability. The yield of PSSA was 40-55%. The success of sulfonated polystyrene was shown by –SO3H group absorption at 1157.29 cm-1. Etherification of glycerol and benzyl alcohol using PSSA catalyst was conducted at 110 °C for 12 hours. The conversion in producing mono–benzyl ether glycerol was 8.10%, 1,3–dibenzyletherglycerol 2.60%, and dibenzyl ether 9.80%. Therefore, the PSSA can be used as etherification catalyst.
Keyword: benzyl alcohol, etherification, glycerol, polystyrene, PSSA