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All Journal HAYATI Journal of Biosciences MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Buletin PSP Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Ilmu-Ilmu Perairan dan Perikanan Indonesia Forum Pasca Sarjana Maspari Journal AGRISAINS JURNAL PERIKANAN DAN KELAUTAN TROPIS ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Akuatika Berkala Perikanan Terubuk POSITRON BIOTROPIA - The Southeast Asian Journal of Tropical Biology Maspari Journal Jurnal Penelitian Hutan Tanaman Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Bisnis Perikanan Journal of Indonesian Coral Reefs Jurnal Kelautan Tropis Omni-Akuatika Acta Aquatica: Aquatic Sciences Journal MAJALAH ILMIAH GLOBE BULLETIN OF THE MARINE GEOLOGY Marine Research in Indonesia Biosaintifika: Journal of Biology & Biology Education Indonesian Aquaculture Journal Jurnal Kebijakan Perikanan Indonesia Jurnal Segara Jurnal Sosial Ekonomi Kelautan dan Perikanan Jurnal Kebijakan Sosial Ekonomi Kelautan dan Perikanan Buletin Ilmiah Marina : Sosial Ekonomi Kelautan dan Perikanan JURNAL PERIKANAN TROPIS Asian Journal of Aquatic Sciences Makara Journal of Science Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Journal of Fisheries & Marine Biodiversitas Journal of Biological Diversity

Dietriech Geoffrey Bengen

Department Of Marine Science And Technology, Faculty Of Fisheries And Marine Science, Bogor Agricultural University, Jl. Agatis No.1 Dramaga, Bogor, 16680 Indonesia

Author-ID : 241924

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Physics Social Sciences Veterinary Other

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Jejaring Sistem Sosial-Ekologi di Kawasan PAAP Kepulauan Wawonii Kabupaten Konawe Kepulauan Provinsi Sulawesi Tenggara: Pemahaman Holistik untuk Transformasi Berkelanjutan Ariston, Muhamad; Adrianto, Luky; Bengen, Dietriech G; Susanto, Handoko Adi
Jurnal Kebijakan Sosial Ekonomi Kelautan dan Perikanan Vol 14, No 2 (2024): Desmeber 2024
Publisher : Balai Besar Riset Sosial Ekonomi Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jksekp.v14i2.13895

Penelitian ini menggunakan metode analisis jaringan sosial-ekologi (SENA) untuk memetakan dan menganalisis sistem sosial-ekologi skala kecil (SES) dalam pengelolaan area akses untuk perikanan skala kecil (PAAP) di Wilayah Kepulauan Wawonii, Kabupaten Kepulauan Konawe. Penelitian ini mengidentifikasi dan menganalisis hubungan antara berbagai aspek sosial, ekologi, ekonomi, tata kelola, dan pemanfaatan sumber daya. Tujuan penelitian adalah menguji dinamika sistem sosial-ekologi di area PAAP Kabupaten Kepulauan Konawe. Penelitian dilakukan dari Februari hingga November 2022 dengan menggunakan metode pengumpulan data primer dan sekunder. Data primer diperoleh melalui observasi, wawancara, dan FGD kepada 227 responden yang terdiri dari nelayan PAAP dan Non PAAP. Sementara itu, data sekunder dikumpulkan melalui studi literatur, dokumen, dan laporan terkait. Model jaringan dasar dari SES dibangun menggunakan pendekatan jaringan untuk memahami pola interaksi antara entitas dalam sistem ini. Komunikasi, deteksi komunitas, dan analisis komputasi menggunakan R paket dilakukan untuk menghasilkan pemetaan terbaik dan mendapatkan wawasan tentang pola interaksi yang ada. Hasil pemetaan mengungkapkan kluster signifikan dan hubungan antara entitas dalam sistem perikanan skala kecil. Penelitian ini juga memberikan pemahaman yang lebih baik tentang hubungan kompleks antara berbagai aspek sistem perikanan skala kecil di Wilayah Kepulauan Wawonii, Kabupaten Kepulauan Konawe, yang dapat menjadi dasar untuk pengambilan keputusan dan pengelolaan yang lebih efektif. Title: Social-Ecological System Networks in the PAAP Wawonii Islands Region, Konawe Islands District: Holistic Understanding for Sustainable Transformation This research utilizes the Social-Ecology Network Analysis (SENA) method to map and analyze small-scale social-ecological systems (SES) in the management of access areas for small-scale fisheries (PAAP) in the Wawonii Islands Region, Konawe Islands District. The study identifies and analyzes the relationships among various social, ecological, economic, governance, and resource utilization aspects. The research objective was to examine the dynamics of social-ecological systems in the PAAP area of Konawe Islands Regency. The research was conducted from February to November 2022 using a combination of primary and secondary data collection methods. Primary data were obtained through observations, interviews, and FGDs involving 227 respondents comprising PAAP and Non-PAAP fishermen. Meanwhile, secondary data were collected through literature reviews, document analysis, and relevant reports A basic network model of the SES is constructed using a network approach to understand the patterns of interactions among entities within this system. Communication, community detection, and computational analysis using the R package are performed to generate the best mapping and gain insights into the existing patterns of interactions. The mapping results reveal significant clusters and relationships among entities within the small-scale fisheries system. This study also provides a better understanding of the complex relationships among various aspects of the small-scale fisheries system in the Wawonii Islands Region, Konawe Islands District, serving as a foundation for decision-making and more effective management.

Mengungkap Aspek Biologi dan Emergence Point Hiu Berjalan Halmahera (Hemiscyllium halmahera) di Laut Pulau Maitara Maluku Utara Indonesia Akbar, Nebuchadnezzar; Ismail, Firdaut; Siolimbona, Abdul Ajiz; Tahir, Irmalita; Paembonan, Rustam E; Subhan, Beginer; Arafat, Dondy; Baksir, Abdurrachman; Subur, Riyadi; N, Furqan; Yidoatimojo, Sudibyo; Nurjaya, I Wayan; Restu, Yunan Gilang; N Natih, Nyoman Metta; Hari, Restu Fajar; Bengen, Dietriech G.
Jurnal Kelautan Tropis Vol 28, No 3 (2025): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v28i3.28334

The Halmahera Walking Shark (Hemiscyllium halmahera) is an endemic marine biota in the Halmahera Sea. This species has a local migration pattern and is territorial. The distribution of this species is in the intertidal area to a depth of 10-15 meters. Previous studies have shown that this species is spread across several islands in the North Maluku Islands. Maitara Island is a small island located between the North Maluku archipelago. The Halmahera Walking Shark species is also found on this island. Information on the Halmahera Walking Shark species is not fully documented. The purpose of the study is related to biological information and emergence points (emergence points) in the Maitara Island Sea. Data collection was carried out on coral reefs, seagrass and mangroves. Samples were captured and morphometric measurements, weight and sex observations were taken. The sea area where the species was found was used to obtain coordinates for the emergence point. An analysis of length-weight relationship data was carried out to see growth patterns. The study found that morphometric measurements varied among individuals, although there were general similarities. Sexes were found in pairs (Male and Female), indicating that proportions and mating were still normal in nature. The habitat of this species is found in the mangrove area, coral reefs, and seagrass, thus describing that there is an association in nature. The emergence point shows that the Halmahera Walking Shark is found along the coast of Maitara Island although the frequency of the number is different. The length-weight relationship found a negative allometric growth pattern. Information on biological aspects and emergence points is important, to be used as a reference for migration areas and habitats for the interests of species, waters, and ecosystem conservation. Hiu Berjalan Halmahera (Hemiscyllium halmahera) merupakan biota laut endemik di laut Halmahera. Spesies ini memiliki pola migrasi lokal dan bersifat teritorial. Penyebaran spesies ini di wilayah intertidal hingga kedalaman 10-15 meter. Penelitian terdahulu menunjukan bahwa spesies ini tersebar di beberapa pulau di Kepulauan Maluku Utara. Pulau Maitara merupakan pulau kecil yang terletak diantara gugusan kepulauan Maluku Utara. Pulau ini juga ditemukan speises Hiu Berjalan Halmahera. Informasi belum terekam lengkap terkait spesies Hiu Berjalan Halmahera. Tujuan penelitian terkait informasi biologi dan emegence point (titik kemunculan) di Laut Pulau Maitara. Pengambilan data dilakukan di terumbu karang, lamun dan mangrove. Sampel ditangkap dan diambil ukuran morfometrik, berat dan pengamatan kelamin. Area laut ditemukannya spesies diambil koordinat untuk di jadikan sebagai titik kemunculan. Analisis data hubungan panjang-berat dilakukan untuk melihat pola pertumbuhan. Hasil penelitian ditemukan ukuran morfometrik bervariasi pada setiap individu, meskipun terdapat kemiripan secara umum. Kelamin ditemukan sepasang (Jantan dan Betina), dengan demikian menunjukan proporsi dan perkawinan masih normal di alam. Habitat tertangkap spesies ini di area mangrove, terumbu karang dan lamun, sehingga mendeskripsikan terdapat asosiasi di alam. Titik kemunculan menunjukan bahwa, Hiu Berjalan Halmahera ditemukan di sepanjang pesisir laut Pulau Maitara meskipun frekuensi jumlah berbeda. Hubungan panjang berat menemukan pola pertumbuhan allometrik negatif. Informasi aspek biologi dan emergence point penting, untuk dapat dijadikan rujukan wilayah migrasi dan habitat untuk kepentingan konservasi spesies, perairan dan ekosistem.

Pendekatan Metabarcoding eDNA untuk Mendeteksi Keanekaragaman Spons Laut: Sistematik Literatur Review dan Bibliometrik Analisis Anggi Mayulina Daulay; Beginer Subhan; Andhika Prima Prasetyo; Dietriech Geoffrey Bengen
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32404

ABSTRAKPenelitian ini bertujuan menganalisis perkembangan, fokus tematik, dan arah riset terkait penggunaan environmental DNA (eDNA) metabarcoding untuk mendeteksi dan mengidentifikasi spons laut (Porifera). Pendekatan yang digunakan adalah systematic literature review (SLR) berbasis PRISMA dan analisis bibliometrik terhadap artikel terindeks Scopus tahun 2009–2025. Dari 116 publikasi awal, 42 artikel memenuhi kriteria inklusi dan dianalisis lebih lanjut menggunakan VOSviewer untuk mengidentifikasi tren publikasi, pola kolaborasi penulis-negara, serta struktur klaster kata kunci. Hasil menunjukkan peningkatan signifikan publikasi sejak 2017, dengan kontribusi terbesar berasal dari Britania Raya, Spanyol, dan Amerika Serikat. Analisis kata kunci menghasilkan lima klaster utama yang mencerminkan arah riset global, yaitu (1) genetika dan biodiversitas, (2) mikrobioma dan metagenomik, (3) ekologi terumbu karang, (4) invertebrata laut, serta (5) lingkungan ekstrem. Meskipun eDNA metabarcoding terbukti sensitif untuk mendeteksi komunitas spons, tantangan utama yang ditemukan mencakup keterbatasan marker gen yang belum universal serta kelengkapan basis data taksonomi yang masih rendah. Novelty penelitian ini terletak pada penggabungan SLR dan bibliometrik secara khusus pada spons laut, sehingga mampu mengungkap kesenjangan geografis, keterbatasan metodologis, serta menawarkan rekomendasi strategis berupa standardisasi protokol, penguatan basis data referensi lokal, dan perluasan kolaborasi internasional, terutama di wilayah megabiodiversitas seperti Indonesia.Kata Kunci: eDNA, metabarcoding, Porifera, bibliometric, keanekaragaman hayati.ABSTRACTThis study analyzes the development, thematic focus, and research direction of environmental DNA (eDNA) metabarcoding applied to the detection and identification of marine sponges (Porifera). A systematic literature review (SLR) following PRISMA and a bibliometric analysis of Scopus-indexed publications from 2009–2025 were conducted. From an initial 116 records, 42 articles met the inclusion criteria and were analyzed using VOSviewer to identify publication trends, author–country collaborations, and keyword cluster structures. Results show a substantial increase in publications since 2017, with major contributions from the United Kingdom, Spain, and the United States. Keyword analysis revealed five major thematic clusters: (1) genetics and biodiversity, (2) microbiome and metagenomics, (3) coral reef ecology, (4) marine invertebrates, and (5) extreme environments. Although eDNA metabarcoding demonstrates high sensitivity for sponge detection, key challenges include non-universal genetic markers and incomplete taxonomic reference databases. The novelty of this study lies in integrating SLR and bibliometric approaches specifically for marine sponges, allowing the identification of geographic gaps, methodological limitations, and providing strategic recommendations for protocol standardization, the development of local reference databases, and enhanced international collaboration, particularly in megabiodiverse regions such as Indonesia.Keywords: eDNA, metabarcoding, Porifera, bibliometric analysis, biodiversity.

PEMANFAATAN RUANG LAUT UNTUK EKOWISATA BERDASARKAN RULES IN-USE OSTROM DI KAWASAN KONSERVASI PULAU GILI MATRA Sidqi, Muhandis; Bengen, Dietriech Geoffrey; Priyanta, Maret; Anggraini, Eva
Buletin Ilmiah Marina Sosial Ekonomi Kelautan dan Perikanan Vol 11, No 2 (2025): DESEMBER 2025
Publisher : Research Center for Marine and Fisheries Socio-Economic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/marina.v11i2.16650

Penelitian ini bertujuan untuk menganalisis kekurangan dan kelemahan substansi peraturan terkait pemanfaatan ruang laut dan pengelolaan Kawasan Konservasi Pulau (KKP) Gili Matra Provinsi Nusa Tenggara Barat dalam konteks kelembagaan pengelola KKP untuk mendukung pengembangan ekowisata berkelanjutan. Penelitian dilakukan di KKP Gili Matra pada bulan Agustus 2024 dengan menggunakan pendekatan kualitatif melalui pemanfaatan data primer dan sekunder. Data primer diperoleh melalui wawancara semi-terstruktur dan mendalam dengan aktor-aktor utama yang terlibat dalam pengelolaan dan pemanfaatan ruang laut, sedangkan data sekunder diperoleh melalui analisis substansi tiga peraturan utama: Peraturan Menteri Kelautan dan Perikanan No. 28 Tahun 2021 tentang Penyelenggaraan Penataan Ruang Laut, Keputusan menteri Kelautan dan Perikanan No. 34 Tahun 2022 tentang Penetapan KKP Gili Air, Gili Meno, dan Gili Trawangan, serta Keputusan Dirjen Pengelolaan Kelautan dan Ruang Laut No. 62 Tahun 2023 tentang Rencana Pengelolaan KKP Gili Matra Tahun 2023–2042. Analisis dilakukan menggunakan konsep rules-in-use dari Elinor Ostrom untuk menilai keselarasan antarperaturan dan efektivitas pengaturan kelembagaan. Hasil penelitian menunjukkan masih terdapat ketidaksinkronan antara substansi peraturan pemanfaatan ruang laut dan pengelolaan KKP Gili Matra, yang berdampak pada hambatan implementasi kegiatan ekowisata. Ketidaksinkronan tersebut disebabkan oleh lemahnya koordinasi dan penguatan kelembagaan antar-pemangku kepentingan, serta belum optimalnya integrasi antara regulasi dan kondisi sosial-ekologis masyarakat setempat.TITLE: MARINE SPATIAL UTILIZATION FOR ECOTOURISM BASED ON OSTROM’S RULES-IN USE IN GILI MATRA CONSERVATION AREAThis study aims to analyze the weaknesses and deficiencies in the substance of regulations governing marine spatial utilization and the management of the Gili Matra Island Conservation Area (KKP Gili Matra) in West Nusa Tenggara Province, within the context of institutional arrangements supporting sustainable ecotourism development. The research was conducted in the Gili Matra Conservation Area in August 2024, using a qualitative approach that combined primary and secondary data. Primary data were collected through semi-structured and in-depth interviews with key stakeholders involved in marine spatial utilization and conservation management, while secondary data were obtained through document analysis of three main regulations: the Minister of Marine Affairs and Fisheries Regulation No. 28 of 2021 on Marine Spatial Planning Implementation, the Ministerial Decree No. 34 of 2022 on the Establishment of the Gili Air, Gili Meno, and Gili Trawangan Conservation Area, and the Directorate General of Marine Spatial and Ocean Management Decree No. 62 of 2023 on the Management Plan of the Gili Matra Conservation Area 2023–2042. The analysis applied Elinor Ostrom’s rules-in-use framework to assess the coherence and institutional effectiveness of these regulations. The findings reveal inconsistencies between the regulatory frameworks of marine spatial utilization and conservation management, resulting in implementation challenges for ecotourism activities. These inconsistencies stem from weak institutional coordination among decision-makers and insufficient integration of regulatory instruments with local socio-ecological dynamics.

PENDEKATAN SPASIOTEMPORAL DALAM MENILAI DINAMIKA IKAN KARANG UNTUK MENDUKUNG KEBIJAKAN KONSERVASI LAUT DI KAWASAN PULAU PIEH (2021–2024) Muslim, Ryan Adhitia; Subhan, Beginer; Bengen, Dietriech G; Adriani, Adriani; Manafi, Efi Noferya; Rahmat, Fadhlan Basiluddin; Ilham, Yuwanda; Kahar, Fauzi Abdul; Samsuardi, Samsuardi; Yennafri, Yennafri; Miswandi, Muhammad
Jurnal Kebijakan Perikanan Indonesia Vol 17, No 2 (2025): (November) 2025
Publisher : Badan Penyuluhan dan Pengembangan Sumberdaya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkpi.17.2.2025.151-161

Terumbu karang merupakan ekosistem penting yang mendukung keanekaragaman hayati laut, dengan ikan karang memainkan peran kunci dalam menjaga keseimbangan ekosistem tersebut. Penelitian ini bertujuan untuk menganalisis hubungan antara kelimpahan ikan karang dan struktur komunitas terumbu karang secara spasial dan temporal di Kawasan Konservasi Pulau Pieh, Sumatera Barat. Penelitian menggunakan data primer yang didapatkan dari 16 stasiun pengamatan yang tersebar di berbagai zonasi konservasi (zona inti, pemanfaatan, dan rehabilitasi) pada kedalaman 5–10 meter, menggunakan metode Underwater Visual Census (UVC) untuk ikan karang dan Underwater Photo Transect (UPT) untuk terumbu karang. Data sekunder didapatkan dari hasil monitoring pengelola kawasan konservasi selama tahun 2021-2024 pada periode yang sama setiap tahun. Hasil menunjukkan bahwa keanekaragaman ikan karang berada pada kategori sedang (1 ≤ H’ ≤ 3), keseragaman komunitas sedang hingga tinggi (E > 0,5), dan dominansi rendah (C < 0,5), yang mengindikasikan kondisi ekosistem yang sehat. Hasil Component Analysis (CA) kelimpahan ikan karang dan tutupan karang menunjukan adanya keterkaitan antara stasiun pengamatan, tutupan karang dan kelimpahan ikan. Penurunan tutupan karang dan kelimpahan ikan pada tahun 2024 menandakan adanya pengaruh dari tekanan ekologis maupun aktivitas antropogenik sehingga pengelolaan yang optimal dan pengetahuan masyarakat perlu ditingkatkan. Hasil penelitian ini dapat menjadi dasar ilmiah dalam pengelolaan kawasan konservasi secara efektif dan berkelanjutan.Coral reefs are vital ecosystems that support marine biodiversity, with reef fishes playing a key role in maintaining the balance of these ecosystems. This study aims to analyze the spatial and temporal relationship between reef fish abundance and coral reef community structure in the Pieh Island Marine Conservation Area, West Sumatra. The research used primary data conducted at 16 observation stations across different conservation zones (core, utilization, and rehabilitation zones) at depths of 5–10 meters, using the Underwater Visual Census (UVC) method for reef fish and the Underwater Photo Transect (UPT) method for coral reefs. Secondary data was obtained from monitoring conducted by conservation area managers during the same period each year from 2021 to 2024. The results showed that reef fish diversity was in the moderate category (1 ≤ H’ ≤ 3), community evenness was stable in moderate to high (E > 0.5), and dominance was low (C < 0.5), indicating a healthy ecosystem condition. The Component Analysis (CA) of reef fish abundance and coral cover revealed a correlation between observation stations, coral cover, and fish abundance. A decline in coral cover and fish abundance in 2024 indicates the influence of ecological stress and anthropogenic activities, highlighting the need for improved management and increased community awareness. The results of this study can serve as a scientific basis for effective and sustainable marine conservation area management.

Preliminary study oceanography and environmental parameters of habitat endemic species Halmahera walking shark (Hemiscyllium halmahera) on Indopacific Ocean Area in North Maluku Indonesia Nyoman Metta N Natih; Nebuchadnezzar Akbar; Dietriech G Bengen; I Wayan Nurjaya; Riyadi Subur; Abdurrachman Baksir; Firdaut Ismail; Iswandi Wahab; Dondy Arafat; Rustam E Paembonan; Abdul Ajiz Siolimbona; Rasidi Rasidi; Asep Sandra Budiman; Beginer Subhan
Depik 2025: Special Issue ICMF
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.46913

The Halmahera Walking Shark (Hemiscyllium halmahera) is an endemic species in the Halmahera Sea. Information related to the environment in general has not been described in a complex manner. The environment is the main factor to support the life of biota. Environmental characteristics are a determining factor in the sustainability of biota. The study aims to provide information related to the physical environment of the habitat of the H. halmahera species. Primary data collection was carried out directly (in situ). Current data was taken using the Lagrange method using a currents drogue. Tides using tidal palms and observed for 24 hours. Secondary data was taken from Marine Copernicus and the Geospatial Information Agency (BIG). All data were tabulated and analyzed by Ocean Data View (ODV) software. The results of the study found that the surface current velocity was found to be in the fast current category. Current speed descriptively provides information on the life of H. halmahera. Primary data shows that the direction of the surface current moves to the east and north. Secondary data in vertical distribution shows weak zonal and meridional current shifts. The tidal pattern was found to be two high and low tides (semidiurnal). The distribution of surface temperature was found to be around 30-32oC. The vertical temperature profile found three layers, namely 1-13m (30oC), 65m (25oC) and 71m (20oC). The chemical environment showed all normal variables. The physical and chemical environmental conditions support H. halmahera to inhabit the sea area of Morotai Island. The environmental description has provided a brief understanding of how the ecological role of the H. halmahera species. Management and sustainability of the environment in the future due to climate change can be done with information on habitat characteristics.Keywords:coral triangleHalmaheranicheNorth Malukutropical

Condition and zonation of mangrove ecosystems in the small islands around the area crossed by the equatorial line of North Maluku Province Najamuddin Najamuddin; Abdurrachman Baksir; Nebuchadnezzar Akbar; Firdaut Ismail; Abdul Ajiz Siolimbona; Dondy Arafat; Rustam E Paembonan; Raismin Kotta; Beginer Subhan; Irmalita Tahir; Nyoman MN Natih; Eko S Wibowo; Ikbal Marus; I Wayan Nurjaya; Dietriech Geoffrey Bengen
Depik Vol 13, No 2 (2024): AUGUST 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.2.32075

The South Halmahera Islands feature a comprehensive marine coastal ecology. The ecosystems found were seagrass, mangrove and coral reef ecosystems. The components that sustain the existence of this ecosystem are employed equitably because of its geographical location on the equator. Mangrove ecosystems that provide benefits directly and indirectly to the community. The purpose of this study was to determine the condition of the mangrove ecosystem based on the hemispherical photography method and the type of zonation. Tawabi Island, Kayoa, South Halmahera Regency served as the site of the equator research. The research station is determined as many as 3 stations. Mangrove percent cover canopy using the hemispherical photography and transect quadrant for density. Field data gathering procedures with transects drawn perpendicular from the sea to the land. Zonation characteristics and thickness using zone tracking. Density mangrove using ecology analysis and zonation using canvas 9.0. The results of the research founded were Rhizophora apiculata, Rhizophora mucronata and Sonneratia alba. Mangrove percent cover canopy were good category (75-81%), where station I (75%), station II (81%) and station III (77%). Station I having 600 trees per ha, station II having 500 trees per ha, and station III having 400 trees per ha (low density category). Mangroves were found in 3 zones Sonneratia alba, Rhizophora apiculata and Rhizophora mucronata. The mangrove thickness from sea to land at station I (65 meters), station II (69 meters) and station III (42 meters).Keywords:biodiversitycoastalequator lineHalmaheratropical

Decadal shifts in sediment dynamics and organic matter accumulation in a highly anthropogenic tropical bay: Banten Bay, Indonesia Nur Aziza; Dietriech Geoffrey Bengen; Tri Prartono; Rastina Rastina
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 13: No. 1 (April, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v13i1.26460

Banten Bay is a semi-enclosed coastal system subjected to intensifying environmental pressures from anthropogenic activities and fluvial inputs, rendering it highly susceptible to alterations in sediment characteristics and organic matter accumulation. This study aims to analyze the distribution of sediment and organic matter content at five strategic observation stations in the waters of Banten Bay. Sediment fraction analysis was conducted using the standard sieving method (ASTM D422-63), while organic matter content was quantified via the Loss on Ignition (LOI) technique. The results reveal that the sediment is predominated by fine-grained particles, specifically silt (64.39 – 76.41%) and clay (21.96 – 27.47%), whereas the sand fraction represents the lowest proportion (1.26 – 9.87%). Based on the USDA textural classification, the sediment is categorized as silty clay. Organic matter content varied between 6.267% and 12.067%, with the highest concentrations observed at central bay stations and those adjacent to mangrove ecosystems. The spatial distribution of fine sediments and organic matter is intrinsically linked to local hydrodynamics, where low-energy current environments facilitate the deposition and retention of fine particles. These findings indicate that Banten Bay’s current environmental regime promotes high fine-sediment deposition and organic matter accumulation, reflecting a significant shift in environmental dynamics compared to historical conditions. This study provides essential baseline data for environmental quality management and long-term ecosystem monitoring in Banten Bay. Keywords: Anthropogenic Pressure; Banten Bay; Organic Matter; Hydrodynamics; Sediment Grain

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.46913

Presenting identification keys and future study on seagrass Halophila major in Indonesia Robba Fahrisy Darus; Dietriech Geoffrey Bengen; Neviaty Putri Zamani; Meutia Samira Ismet
Depik Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.2.44166

Halophila major is a new species with a wide distribution across various regions in Indonesia. The species was identified in 2020 through a combination of morphology and molecular approaches. Several studies have shown that it has a similar morphology to H. ovalis, which causes significant confusion during identification. Therefore, this study aims to describe the key identification and habitat of H. major and summarize seagrasses study opportunities based on the trend of published articles. A bibliometric analysis was used to summarize the habitat, morphometrics, molecular confirmation, and trend of seagrass topics in Indonesia. Based on the scientific articles, H. major has bigger morphometrics than H. ovalis. In addition, the number of paired and branching cross veins was reported to be an identification key of H. major. The species was also considered a deep ovalis found in 2-4 m depth. Genetically, the Internal Transcribed Spacer (ITS) gene marker was appropriate to showits phylogenetic tree. H. major was also classified into different clades with H. ovalis due to various factors. The results showed that genetics, tourism, and restoration were topics with the potential to be explored in the future. This study recommended collaborating in multi-institution to transfer knowledge, technologies, and project arrangements for seagrass exploration.Keywords:BibliometricHalophilaMarine angiospermaeMarin plantRediscoverySpecies

Co-Authors . Ahyar . Chaidir . Suharsono Abdul Ajiz Siolimbona Abdul Ajiz Siolimbona Abdul Harim Abdullah Hisam bin Omar Abdurrachman Baksir Abdurrachman Baksir Abdurrachman Baksir, Abdurrachman Abimanyu Takdir Alamsyah Abrahamsz, Jodie G. Achmad Fahrudin Achmad Fahrudin Achmad Fahrudin Achyani, Ratno Aditya Hikmat Nugraha ADRIANI ADRIANI Afdal Afdal, Afdal Agung Putra Utama Agus Atmadipoera Agus Sholeh Atmadipoera Agustin Rustam Ahmad Najid Al Azhar Al Azhar Alan Frendy Koropitan Alimudin Laapo An Nisa Nurul Suci Andhika Prima Prasetyo Andi Irwan Nur, Andi Irwan Angela Mariana Lusiastuti Anggi Mayulina Daulay Anna Ida Sunaryo Purwiyanto Arief Pratomo Arif Satria Ario Damar Arisandi, Defrian Marza Ariston, Muhamad Asep Sandra Budiman Audina Putri Awal . Subandar, Awal . Awal Subandar Ayu, Inna Puspa Beale, Calvin S. Beginer Subhan Bintal Amin Bintang Prayoga Budi Hascaryo Iskandar Budi Prabowo Budy Wiryawan Burhanis Burhanis Chaidir Chaidir Dafit Ariyanto David Smith Dedi Soedharma DIANA RIFKA SIMANULLANG Dondy Arafat EFRIN ANTONIA DOLLU Efriyeldi, Efriyeldi Ekawati Sri Wahyuni Eko S Wibowo Erlania Erlania Etty Riani Eva Anggraini Faisal Hamzah Fauzan Dzulfannazhir Ferawati Runtuboi Ferdinan Yulianda FERY KURNIAWAN Firdaut Ismail Firdaut Ismail Franto Novico Fredinan Yulianda Gede Iwan Setiabudi GIYANTO GIYANTO Hanif Budi Prayitno Hari, Restu Fajar Harpasis Slamet Sanusi Hawis Madduppa Hawis H Madduppa Hawis Madduppa Hefni Effendi Heron Surbakti Hilda Zulkifli Hilda Zulkifli Hilda Zulkifli I Wayan Nurjaya I Wayan Nurjaya I Wayan Nurjaya Idris Idris Ikbal Marus Ilham, Yuwanda INDRA PUTRA ALMANAR Indri Manembu Ira Dillenia Irma Akhrianti Irmalita Tahir Irmalita Tahir, Irmalita Isdradjad Setyobudiandi Isdradjad Setyobudiandi Ismail, Firdaut Isni Nurruhwati Iswandi Wahab John Haluan John I Pariwono Jonson Lumban Gaol Joshian N.W. Schaduw Juraij Juraij Kadarwan Soewardi Kahar, Fauzi Abdul Kurdi Gunawan Lalu M Iqbal Sani Lalu M. Iqbal Sani Leni Maryani Lieng, Lieng LILIK BUDIPRASETYO LUDI PARWADANI AJI Luhulima, Yunita Luky Adrianto Luzmi Malia Izza Mai Suriani Majariana Krisanti Manafi, Efi Noferya Maret Priyanta Martini Djamhur Maya F Tamimi Mennofatria Boer Meutia Samira Ismet Michael John Sweet Michael Sweet Miswandi, Muhammad Mudjirahayu Mudjirahayu Muh. Adhim Adrian Muh. Ishak Jumarang Muh. Rasman Manafi MUHAMMAD ABRAR Muhammad Agus Muljanto Muhammad Kasnir Muhammad Masrur Islami, Muhammad Masrur Muhandis Sidqi, Muhandis Mujizat Kawaroe Mujizat Kawaroe Mujizat Kawaroe Mujizat Kawaroe Mujizat Kawaroe Mujizat Kawaroe Mulyono S. Baskoro N Natih, Nyoman Metta N, Furqan Najamuddin Najamuddin Najamuddin Najamuddin, Najamuddin Najid, Ahmad Nanda Tiara Diningsih Nebuchadnezzar Akbar Nella Tri Agustini, Nella Tri Neviaty P Zamani Neviaty P. Zamani NEVIATY PUTRI ZAMANI Neviaty Putri Zamani NEVIATY PUTRI ZAMANI NEVIATY PUTRI ZAMANI Neviaty Putri Zamani Neviaty Putri Zamani Neviaty Putri Zamani NEVIATY PUTRI ZAMANI NI WAYAN PURANAMASARI Noferya, Efi Noverita Dian Takarina Novi Susetyo Adi, Novi Susetyo Novian Prahandhy Kusuma Nur Aziza Nuraini Nuraini Nurlisa Alias Butet Nurlita Putri Anggraini Nyoman M N Natih NYOMAN M. N. NATIH Nyoman M.N Natih Nyoman Metta N Natih Nyoman Metta N. Natih Ocky Karna Radjasa Ofri Johan Ofri Johan Ofri Johan Ofri Johan Paembonan, Rustam E Prakas Santoso R Widodo Rahma Aprilian Rahmat, Fadhlan Basiluddin Rainer A Troa Raismin Kotta Ramili, Yunita Rasidi Rasidi Rastina Rastina Rastina, Rastina Restu, Yunan Gilang Retraubun, Alex S.W. Riana Faiza Riani Widiarti Riani Widiarti Richard J. Stanford Richardus F Kaswadji Richardus F Kaswadji Richardus Kaswadji Richardus Kaswadji RIDWAN AFFANDI Rika Anggraini RIKOH MANOGAR SIRINGORINGO Riris Aryawati Riris Aryawati Risandi Dwirama Putra Rita Rachmawati Riyadi Subur, Riyadi Robba Fahrisy Darus Robba Fahrisy Darus Rokhmin Dahuri Roni Bawole Rozirwan . Rudi Febriamansyah Rustam E Paembonan Rustam E Paembonan Ryan Adhitia Muslim Sadikin Amir Saenudin Safar Dody Salsabila, Afviya Samsuardi Samsuardi, Samsuardi Sebastian C. A. Ferse Setyaningsih, Wahyu Adi Setyo Handayani Setyo Pertiwi Simatupang, Candida Putri Nauli Siolimbona, Abdul Ajiz Sonja Kleinertz Subhat Nurhakim Suhaemi Suharsono Suharsono Suharsono _, Suharsono Susanto, Handoko Adi Syahrial Syahrial Taqiyuddin, Muhammad Wijdan Tengku Zia Ulqodry Tirtama, Wahyu Tri Hartanto Tri Prartono Tridoyo Kusumastanto Try Al Tanto Ummu Salma Unstain NWJ Rembet Vijaya Isnaniawardhani Wahab, Iswandi Wahyudi, A’an Johan Welly, Marthen Welmar Olfan Barat, Welmar Olfan Wike Ayu Eka Putri Yanelis Prasenja Yennafri, Yennafri Yidoatimojo, Sudibyo Yuli Naulita Yulianto Suteja Yundari, Yundari Yunianto Setiawan, Yunianto Yusli Wardiatno Zamani, Nevianty P Zulfikar, Andi

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