Judul: Karakteristik dan Dampak Pengelolaan Ekosistem Mangrove Rehabilitasi di Kawasan Konservasi dan Wisata: Studi Kasus Pulau Pramuka dan Pulau Pari
Abstrak: Ekosistem mangrove memiliki manfaat ekologi maupun ekonomi. Namun, rentan terhadap kerusakan dan penurunan biodiversitas. Oleh sebab itu, pemahaman mengenai pengelolaan dan strategi rehabilitasi mangrove penting. Penelitian ini bertujuan menganalisis karakteristik pengelolaan ekosistem mangrove di kawasan konservasi dan wisata di Pulau Pramuka dan Pulau Pari, Kepulauan Seribu, pada November 2023–Februari 2024. Metode yang digunakan, yaitu melakukan wawancara secara purposive sampling, pengambilan data vegetasi mangrove, dan sampel makrozoobentos. Variabel yang dianalisis meliputi karakteristik pengelolaan (tata kelola, aturan lokal, strategi rehabilitasi, dan pengelolaan pasca tanam) dan dampak pengelolaan (cakupan mangrove rehabilitasi, kerapatan mangrove, dan keanekaragaman makrozoobentos). Hasil penelitian menunjukkan dua jenis mangrove di Pulau Pramuka (Rhizophora stylosa dan Rhizophora mucronata) dan empat jenis mangrove di Pulau Pari (Rhizophora stylosa, Rhizophora apiculata, Soneratia alba, dan Bruguiera cylinndrica). Tingkat kerapatan mangrove pada kedua pulau tergolong sangat padat (31.714-128.500 ind/ha). Kepadatan makrozoobentos di Pulau Pramuka dan Pulau Pari masing-masing sebesar 121 ind/m2 dan 189 ind/m2 dengan keanekaragaman sedang. Kerapatan mangrove berkorelasi positif dengan kepadatan makrozoobentos (r>0.9). Terdapat perbedaan pengelolaan mangrove di kedua pulau dari segi tata kelola, aturan lokal, pengawasan dan pemeliharaan pasca tanam., The mangrove ecosystem has both ecological and economic benefits. However, it is vulnerable to damage and biodiversity loss. Therefore, understanding mangrove management and rehabilitation strategies is crucial. This research aims to analyze the characteristics of mangrove ecosystem management in conservation and tourism areas on Pramuka Island and Pari Island, Kepulauan Seribu, from November 2023 to February 2024. The methods used include purposive sampling interviews, mangrove vegetation data collection, and macrozoobenthos sampling. The variables analyzed include management characteristics (governance, local regulations, rehabilitation strategies, and post-planting management) and management impact (rehabilitated mangrove coverage, mangrove density, and macrozoobenthos diversity). The research results show two types of mangroves on Pramuka Island (Rhizophora stylosa and Rhizophora mucronata) and four types on Pari Island (Rhizophora stylosa, Rhizophora apiculata, Soneratia alba, and Bruguiera cylindrica). The mangrove density on both islands is classified as very dense (31,714-128,500 ind/ha). The macrozoobenthos density on Pramuka Island and Pari Island is 121 ind/m2 and 189 ind/m2, respectively, with moderate diversity. Mangrove density positively correlates with macrozoobenthos density (r>0.9). There are differences in mangrove management between the two islands in terms of governance, local regulations, post-planting monitoring, and maintenance.
Keyword: mangroves, macrozoobenthos, management, rehabilitation

Judul: Mangrove Resources Management Strategy in Pari  Island, Seribu Islands
Abstrak: SHAVA HUSNANIZAHWA. Strategi Pengelolaan Sumberdaya Mangrove di Pulau Pari, Kepulauan Seribu. Dibimbing oleh Prof. Dr. Ir. FREDINAN YULIANDA, M.Sc. dan Prof. Dr. Ir. MENNOFATRIA BOER, DEA. Ekosistem mangrove memiliki peran penting dalam komponen penyusun wilayah pesisir yaitu menjaga garis pantai dan mencegah terjadinya abrasi. Ekosistem mangrove berfungsi sebagai tempat pemijahan (spawning ground), tempat pengasuhan (nursery ground), dan tempat mencari makan (feeding ground) oleh biota laut. Masyarakat sering mengambil buah mangrove dan nelayan biasanya menangkap ikan di sekitaran mangrove. Destinasi wisata yang ditawarkan oleh masyarakat yaitu mengelilingi hutan mangrove menggunakan perahu milik masyarakat. Pengelolaan yang dilakukan oleh masyarakat Pulau Pari masih mengedepankan mass tourism sehingga dihawatirkan menimbulkan kerusakan dan pencemaran lingkungan. Tujuan penelitian adalah mengetahui kondisi sumberdaya mangrove dan menentukan strategi pengelolaan pada sumberdaya mangrove. Penelitian dilaksanakan pada bulan September hingga November 2023 di Pulau Pari, Kepulauan Seribu. Analisis yang digunakan adalah Indeks kesehatan mangrove (IKM) dan analisis SWOT. Hasil yang diperoleh adalah nilai IKM pada area penelitian tergolong kedalam kategori sedang. Terdapat tiga jenis mangrove yaitu Rhizophora stylosa, Rhizophora apiculata dan Sonneratia alba. Strategi alternatif berdasarkan prioritas untuk pengelolaan sumberdaya mangrove yaitu implementasi dan penegakan aturan yang jelas terkait pengelolaan mangrove dengan adanya keterlibatan antara pemerintah dan masyarakat serta melakukan konservasi mangrove berbasis masyarakat dengan adanya keterlibatan pemerintah., SHAVA HUSNANIZAHWA. Mangrove Resources Management Strategy in Pari Island, Seribu Islands. Supervised by Prof. Dr. Ir. FREDINAN YULIANDA, M.Sc. and Prof. Dr. Ir. MENNOFATRIA BOER, DEA. The mangrove ecosystem plays an important role in the components of coastal areas by maintaining the coastline and preventing erosion. The mangrove ecosystem functions as a spawning ground, nursery ground, and feeding ground for marine biota. The community often harvests mangrove fruits, and fishermen usually catch fish around the mangroves. The tourism destination offered by the community includes tours around the mangrove forest using local boats. The management conducted by the Pulau Pari community still prioritizes mass tourism, which is feared to cause damage and environmental pollution. The aim of the study is to determine the condition of mangrove resources and to develop a management strategy for these resources. The research was conducted from September to November 2023 on Pari Island, Seribu Islands. The analyses used are the Mangrove Health Index (IKM) and SWOT analysis. The results show that the IKM value in the research area falls into the poor category. There are three types of mangroves Rhizophora stylosa, Rhizophora apiculata, and Sonneratia alba. The alternative strategy based on priority for mangrove resource management includes the implementation and enforcement of clear regulations regarding mangrove management with the involvement of both the government and the community, and conducting community-based mangrove conservation with government participation.
Keyword: Pulau Pari, Pari Island, ekosistem mangrove, pengelolaan, strategi, management, mangrove ecosystem, strategy

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
Keyword: