Judul: Community Structure of Fishes Associated with Mangrove Ecosystem in Pasir Perawan Beach, Pari Island, Seribu Islands
Abstrak: Ekosistem mangrove merupakan ekosistem yang unik karena menjadi penghubung antara ekosistem darat dan laut serta memiliki manfaat secara ekologis dan ekonomis. Ekosistem mangrove memiliki fungsi ekologis sebagai daerah asuhan (nursery ground), daerah pemijahan (spawning ground), serta daerah mencari makan (feeding ground) bagi beragam biota akuatik. Minimnya informasi mengenai struktur komunitas dan kelimpahan ikan di Pantai Pasir Perawan, Pulau Pari membuat perlu dilakukannya penelitian mengenai pengaruh revegetasi mangrove terhadap struktur komunitas dan kelimpahan ikan. Penelitian ini bertujuan untuk menganalisis kekayaan jenis, kelimpahan ikan, dan struktur komunitas ikan di perairan ekosistem mangrove Pantai Pasir Perawan, Pulau Pari, Kepulauan Seribu. Pengumpulan data dilakukan selama enam bulan dari November 2023 sampai April 2024. Pengambilan sampel menggunakan pukat pantai (seine net) yang ditarik sepanjang 50 meter. Sampel diidentifikasi dan diukur panjang serta bobotnya di laboratorium. Data yang terkumpul kemudian dianalisis secara deskriptif. Ikan yang didapatkan sebanyak 4.594 ekor terdiri atas 38 spesies dari 18 famili dan 10 ordo. Komposisi ikan didominasi oleh stadia yuwana yaitu sebesar 71% dari total ikan yang tertangkap. Struktur komunitas ikan dalam keadaan stabil dengan indeks kekayaan spesies yang rendah, indeks keanekaragaman yang sedang, indeks keseragaman yang mendekati satu dan tergolong sedang, serta tidak ada spesies yang mendominasi. Ada hubungan positif antara kelimpahan ikan dengan kerapatan mangrove., The mangrove ecosystem is unique because it is a link between land and sea, and it has ecological and economic benefits. Mangrove ecosystems have ecological functions as nursery, spawning, and feeding grounds for many aquatic biotas. The lack of information on community structure and fish abundance at Pasir Perawan Beach, Pari Island makes it necessary to conduct research on the effect of mangrove revegetation on community structure and fish abundance. This study aims to analyze species richness, fish abundance, and fish community structure in the mangrove ecosystem waters of Pasir Perawan Beach, Pari Island, and Seribu Islands. Data collection was conducted for six months, from November 2023 to April 2024. We collected samples using a 50-meter-long seine net. The samples were then identified, and the length and weight of the fish were measured in the laboratory. The data collected were analyzed descriptively. We obtained 4,594 fish, comprising 38 species from 18 families and 10 orders. The fish composition consisted mostly of juvenile fish, making up 71%. The overall fish community structure was stable, with a low species richness index, moderate diversity index, and a uniformity index close to one. This indicates a moderate level of diversity with no dominant species. We also observed a positive correlation between the abundance of fish and the density of mangroves.
Keyword: ikan, mangrove, struktur komunitas, daerah asuhan

Judul: Socio-Ecological System of Mangrove Ecotourism in Pari Island, Seribu Island, DKI Jakarta
Abstrak: Ekosistem mangrove adalah ekosistem pesisir yang dimanfaatkan sebagai olahan pangan, perikanan, dan ekowisata. Tujuan penelitian ini adalah mengidentifikasi komponen sistem sosial ekologi, mendeskripsikan pemanfaatan serta faktor-faktor pendukung pengelolaan mangrove Pulau Pari, Kepulauan Seribu. Pengumpulan data diperoleh dengan pengukuran kerapatan mangrove dan kualitas air pada 3 stasiun. Wawancara dilakukan kepada masyarakat, wisatawan, dan pengelola wisata. Analisis data terdiri dari analisis kerapatan mangrove, konektivitas sistem sosial ekologi, analisis pemangku kepentingan, dan analisis strategi pengelolaan mangrove. Hasil menunjukkan bahwa komposisi mangrove di Pulau Pari tergolong dalam kategori sedang dengan spesies yang mendominasi adalah Rhizophora stylosa. Konektivitas yang terjadi pada sistem sosial-ekologi ekowisata mangrove menunjukkan bahwa peran resources governance masih minim. Rekomendasi pengelolaan yang penting untuk dilakukan yaitu kerjasama pemerintah dengan masyarakat pulau sebagai aktor yang turut serta mengelola ekosistem., Mangrove ecosystems are coastal ecosystems that are utilized as processed food, fisheries, and ecotourism. The purpose of this study was to identify the components of the social ecological system, describe the utilization and supporting factors of mangrove management on Pari Island, Kepulauan Seribu. Data collection was obtained by measuring mangrove density and water quality at 3 stations. Interviews were conducted with the community, tourists, and tour managers. Data analysis consists of mangrove density analysis, social ecological system connectivity, stakeholder analysis, and mangrove management strategy analysis. The results showed that the composition of mangroves on Pari Island was classified as moderate with the dominating species being Rhizophora stylosa. The connectivity that occurs in the social-ecological system of mangrove ecotourism shows that the role of resource governance is still minimal. Management recommendations that are important to do are government cooperation with the island community as actors who participate in managing the ecosystem.
Keyword: connectivity, ecotourism, mangrove, Pari Island

Judul: Sintesis Flavonol melalui 2’-Hidroksikalkon
Abstrak: Flavonol is a class of flavonoids commonly found in fruits and vegetables. Flavonol is very useful, especially in food sector and health. In this study, flavonol unsubstituted was successfully synthesized from an intermediate material 2’-hydroxychalcone. The 2’-hydroxychalcone was synthesized by Claisen-Schmidt condensation method between o-hydroxyacetophenone and benzaldehyde using 4 different catalysts, namely KOH 60%, solid pellet of KOH-grinding technique, BF3-Et2O, and NaH in DMF. The KOH 60% was the best catalyst, giving the highest yield (57%). Afterward, the flavonol was synthesized in 1-stage oxidation cyclization of o-hydroxyacetophenone using Algar-Flynn-Oyamada (AFO) reaction, giving 76%. The flavonol total yield from 2’-hydroxychalcone was 43%. All synthesized products were characterized by their melting points and their spectra. The success of the synthesis flavonol opens the way to synthesis of useful flavonol derivatives such as quercetin and kaempferol.
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