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All Journal HAYATI Journal of Biosciences Jurnal Teknologi Perikanan dan Kelautan Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Journal of Marine and Aquatic Sciences ILMU KELAUTAN: Indonesian Journal of Marine Sciences Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Journal of Indonesian Coral Reefs Jurnal Kelautan Tropis Aceh Journal of Animal Science JURNAL ENGGANO Jurnal Sumberdaya Akuatik Indopasifik JFMR (Journal of Fisheries and Marine Research) Omni-Akuatika Jurnal Resolusi Konflik, CSR dan Pemberdayaan (Jurnal CARE) Jurnal Perikanan Universitas Gadjah Mada Jurnal Ilmu Kelautan Kepulauan Jurnal Kebijakan Perikanan Indonesia Jurnal Laot Ilmu Kelautan International Journal of Marine Engineering Innovation and Research Jurnal Risalah Kebijakan Pertanian dan Lingkungan Hydrogen: Jurnal Kependidikan Kimia Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Policy Brief Pertanian, Kelautan, dan Biosains Tropika Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Journal of Fisheries & Marine E-Amal: Jurnal Pengabdian Kepada Masyarakat Biodiversitas Journal of Biological Diversity
Beginer Subhan
Department Of Marine Science And Technology, Faculty Of Fisheries And Marine Science, IPB University, Bogor, 16680. Indonesia
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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

Abstract

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

Abstract

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.
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

Abstract

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.
Phytoplankton in Eutrophic Waters of Hurun Bay: An Examination of Composition Patterns, Structure, and Impacts on Aquatic Ecosystems Maestro Munru; Meutia Samira Ismet; yoman Metta N Natih; Beginer Subhan; Nasrul Aziz
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4917

Abstract

Ecological conditions are shifting due to increased anthropogenic activities along coastal areas. These activities are affecting the life cycle of aquatic organisms, especially phytoplankton. This study, conducted in the unique ecosystem of Hurun Bay Lampung, aims to analyze the composition and structure of phytoplankton communities in eutrophic waters and water quality conditions. Sampling was conducted in two different months, August and October, by vertical hauling from a depth of 5 meters to the surface. The results revealed a rich diversity of phytoplankton, with 72 genera, 48 families, and 6 classes identified in August, and 55 genera, 42 families, and 6 classes identified in October. The diatom group was the most prevalent, accounting for over 90% of the total, with the highest abundance found in Skeletonema and Chaetoceros. The diversity, uniformity, and dominance indices were all in the low to medium category, indicating a balanced ecosystem.
Mapping and validation of spatial algorithm for monitoring turbidity of seagrass habitat using sentinel-2B imagery in Ternate Island Rustam Effendi Paembonan; Dietriech Geoffrey Bengen; I Wayan Nurjaya; Syamsul Bahri Agus; Nyoman Metta N Natih; Beginer Subhan; Joko Santoso
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.0.0.46989

Abstract

Turbidity is a parameter of the marine environment that greatly affects the condition of seagrass whose habitat is an intertidal zone in shallow sea waters. Seagrass is an important type of ecosystem that can be found in several coastal areas of Ternate Island. This study aims to analyze the turbidity conditions of seagrass habitat waters and apply a remote sensing algorithm using Sentinel 2B images. The turbidity research method was carried out by field measurements. The turbidity algorithm model used refers to references with mathematical equations (Rrs665-0.014)/0.013, and the development of a new algorithm as a comparison algorithm. Both algorithms were validated with field data to determine the level of accuracy using the Normalized Mean Absolute Error (NMAE) and determination coefficient (R2). The results were obtained from turbidity data with values ranging from 0.3 NTU to 1.5 NTU with an average value of 0.87 0.45 NTU. The Sentinel 2B image in this study was restored with geometric corrections, atmosphere, radiometric digital values, land masking, and sun glint. The turbidity algorithm model used obtained good accuracy in mapping and monitoring the turbidity of seagrass habitat waters on Ternate Island. The application of the turbidity algorithm used as a reference in this study has an NMAE value of 50.44 and R2 of 0.8822, while the newly discovered turbidity algorithm has an NMAE value of 29.38 and R2 of 0.8827.Keywords:remote sensingecosystemscoastalsedimentationNorth Maluku
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

Abstract

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

Abstract

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
Effective DNA extraction method for metagenomic analysis of rhizosphere bacteria from mangrove sediments Siti Maysaroh; Meutia Samira Ismet; Beginer Subhan; Rita Andini; Enny Rimita Sembiring; Nurlita Putri Anggraini
Depik Vol 12, No 2 (2023): AUGUST 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.2.32850

Abstract

Mangrove, Rhizophora mucronata, grows in the intertidal area, which contains much organic matter and varying salinity. The organic matter content is influenced by the bacterial community that inhabits the ecosystem, but information regarding the bacterial community, especially in the mangrove root system, is not widely available. There are several challenges in completing this information, one of which is that the method used is still in a conventional form. Developments in environmental DNA analysis can support and complement this information. However, this method must be optimized because the organic matter content and salt variations affect the extraction results. Thus, this study aimed to determine the optimal approach for extracting bacterial DNA from mangrove sediments. The analysis used two methodologies: manual DNA extraction techniques based on buffer modification and DNA extraction kits. There were four different treatments, namely the soil DNA isolation plus kit (M1), the fecal / soil microbial quick-DNA miniprep kit (M2), glass powder with charcoal (M3), and glass powder with skimmed milk (M4). DNA samples were obtained from each method and assessed for concentration and purity using a nanodrop. In addition, the resulting DNA's quality was analyzed using 1.5% agarose. The results obtained were in the M2 treatment, which showed optimal results compared to the others. M2 uses a bead-based beating and spin column method to achieve optimal DNA concentration through high molecular weight. The DNA obtained was also protein-free, and several samples were contaminated with humic acid, namely KL.S1, KL.S4, and T7.S4.Keywords:Bacteria 16SBead beatingDNA ExtractionSedimentSpin column
Biodiversity and DNA Barcoding of Seagrass in an Equatorial Small Island Ecosystem of Kayoa Island, Eastern Indonesia Riyadi Subur; Nebuchadnezzar Akbar; Salim Abubakar; Firdaut Ismail; Rustam E Paembonan; Beginer Subhan; Dondy Arafat; Muhammad Irfan
Jurnal Ilmiah Perikanan dan Kelautan Vol. 18 No. 2 (2026): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v18i2.83915

Abstract

Graphical Abstract Highlight Research 1. This research provides initial and current information regarding seagrass on small islands right on the equator. 2. directly depicts the diversity, density and cover of seagrass in a unique region, namely a small island crossed by the equator. 3. The environmental conditions of marine waters in seagrass areas on islands crossed by the equator have been described. 4. The latest information specifically describing seagrass and the ecology of equatorial marine environments. Essential for the development of future knowledge and technology. 5. DNA barcoding was capable of resolving field identification challenges and providing taxonomic clarification based on DNA sequence data.   Abstract Equatorial small islands host dynamic coastal ecosystems, yet seagrass biodiversity and molecular identification remain poorly documented. Complete information on coastal ecosystems has not been provided for seagrass in the equatorial latitudes. Seagrass is dynamically distributed throughout the equatorial latitudes. The area that the equatorial latitudes also traverse is known as the indotropic region. Eastern Indonesia’s Kayoa Island is situated directly on the equator. However, seagrass biodiversity and DNA-based species confirmation in this region remain insufficiently documented. There are no published research on seagrass, particularly on biodiversity. The aim of this study is to reveal the diversity of seagrass in equatorial latitudes on the small islands. The methodology in this study was purposive sampling with a quadrant line transect was used to obtain the samples. In situ identification of seagrass species was done. Seagrass samples were taken from the leaves for DNA analysis purposes. Leaf samples were analyzed using molecular methods in the laboratory. To determine the distribution of seagrass ecology and environmental were subjected to PCA analysis. The results showed that six seagrass species were identified. It has been discovered that seagrass may develop in the tropical region under typical environmental conditions. Despite the fact that six species were discovered, diversity was limited. In this region, seagrass cover is typically high and supports a healthy species density. Species diversity was low, whereas percent cover and density were locally high. Overall, the study indicated relatively low diversity and density values. DNA barcoding has revealed differences in morphological identification.This discovery represents preliminary data that can be investigated further in subsequent studies.
Morphometric Features of Noctiluca scintillans from Jakarta Bay Radixa Radhya Ramadhan Haryanto; Meutia Samira Ismet; Adriani Sunuddin; Inna Puspa Ayu; Muhammad Izzat Nugraha; Alfaiz Arselan; Kesha Mufthi Java Tanaya; Dea Fauzia Lestari; Dondy Arafat; Nadya Cakasana; Beginer Subhan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 31, No 2 (2026): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.31.2.133-144

Abstract

Noctiluca scintillans is a mixotrophic dinoflagellate commonly associated with eutrophic coastal systems and bloom dynamics. This study aims to characterize the morphometric variability of N. scintillans in Jakarta Bay, a tropical coastal environment strongly influenced by anthropogenic nutrient enrichment, and to evaluate how cellular morphology reflects functional and ecological responses under eutrophic conditions. Plankton samples were collected in February 2024 and analyzed using high-resolution microscopy to quantify key morphometric traits, including cell diameter, biovolume, aspect ratio, surface area-to-volume (SA:V) ratio, and nucleus-to-cytoplasm (N:C) ratio. Differences between red (RNS) and green (GNS) morphotypes were assessed using non-parametric statistical analyses, and preserved measurements were corrected to estimate live cell size. A total of 121 cells were analyzed, with RNS overwhelmingly dominating the population. RNS exhibited significantly larger cell diameter and volume than GNS, while SA:V ratios differed significantly between morphotypes, indicating functional differences in size-related morphology. In contrast, aspect ratio did not differ significantly, suggesting overall conservation of cell shape across morphotypes. Estimated live cell sizes indicate that N. scintillans populations in Jakarta Bay are dominated by relatively small cells compared to those reported from temperate regions. Variability in the N:C ratio further suggests heterogeneity in cellular physiological states within the population. Overall, these findings establish a morphometric baseline for N. scintillans in Jakarta Bay and highlight the value of morphometric traits as integrative indicators of physiological variability and environmental forcing in tropical eutrophic coastal systems.
Co-Authors Abdul Ajiz Siolimbona Abdul Ajiz Siolimbona Abdul Motalib Angkotasan ABDURRACHMAN BAKSIR Abdurrachman Baksir Abdurrachman Baksir Abdurrachman Baksir Abdurrachman Baksir, Abdurrachman Abjan Ibrahim, Abjan ACHIS M. SIREGAR Adewal, Murad Alvian K ADITYA BRAHMANDITO Aditya Bramandito ADITYA BRAMANDITO ADITYA BRAMANDITO ADRIANI ADRIANI Adriani Sunuddin Adriani Sunuddin AFIFAH F. JANSIT Afiff , Usamah Agus Ramli Ahmad Eko Suprianto Ahmad Taufik Ghozali AHMAD TAUFIK GHOZALI Ahmad Taufik Ghozali Aisyah, Siti Zanuba AJI WAHYU ANGGORO Aji Wahyu Anggoro Alan Frendy Koropitan ALFAIZ ARSELAN Alfaiz Arselan Ali Mashar Aliati Iswantari Alimuddin Alla Asmara Am Azbas Taurusman AM AZBAS TAURUSMAN Andhika Prima Prasetyo ANDIKA NOVRIANSYAH ANDRIANUS SEMBIRING ANDRIANUS SEMBIRING Andrianus Sembiring Anggi Mayulina Daulay Anggraini, Nurlita ANIK MARTINAH Anwar, Muhammad Fathur Aradea Bujana Kusuma Aradea Bujana Kusuma Ardan Samman Arief Pratomo Arif Miftahul Aziz, Arif Miftahul ARINI S. P. PUTRI Ario Damar Arta Silaban Asadatun Abdullah Asep Sandra Budiman Ayu Ervinia Ayu, Inna Puspa Aziz, Nasrul Azizah Lutfia Ningtyas Bashari, Muhammad Hasan Benyamin, Azhari Bertoka Fajar S.P. Negara Borbee, Erin Budi Prabowo BUDIONO SENEN Carolline Desrainy Nababan Christopher E. Lane Citra S. U. Dewi Citra Satrya CITRA SATRYA UTAMA DEWI Citra Satrya Utama Dewi Dea Fauzia Lestari, Dea Fauzia Dedi Soedharma Dedi Soedharma Denny Khaerudi DENNY KHAERUDI DENNY KHAIRUDI DERTA PRABUNING DEWA GEDE RAKA WIADNYA Dewi, Citra Satrya Utama Diah Ayuningrum, Diah Dian Pertiwi Dietrich Geoffrey Bengen Dietrich Geoffrey Bengen Dietriech G Bengen DIETRIECH G. BENGEN DIETRIECH GEOFFREY BENGEN DIETRIECH GEOFFREY BENGEN Dietriech Geoffrey Bengen Dietriech Geoffrey Bengen DONDY ARAFAT Dondy Arafat Dondy Arafat DONDY ARAFAT DONDY ARAFAT Dondy Arafat DOUGLAS FENNER DWI LISTYO RAHAYU Dwi Yuni Wulandari E Paembonan, Rustam EDWIN JEFRI Efahmi, Efahmi EFRIN ANTONIA DOLLU EKA MAYA KURNIASIH Eko S Wibowo Eko S Wibowo Elfahmi Elfahmi, Elfahmi ELOK FAIQOH Elok Faiqoh ENDANG S. SRIMARIANA Endang Sunarwati Srimariana Enny Rimita Sembiring ENY SUPARYANI Erin Borbee Ester Restiana Endang Gelis Fadel Muhammad Fadhilah Rahmwawati FADHILLAH RAHMAWATI Fadillah Rahmawati Fahlevi, Arief Reza Fajar Maulana Fauzan Dzulfannazhir Fauzan Dzulfannazhir Febriantika, Putri Fenetiruma, Syamsudin FENI IRANAWATI FIRDAUT ISMAIL Firdaut Ismail Firdaut Ismail Firdaut Ismail Firdaut Ismail Firdaut Ismail GATOT CIPTADI Gelis, Ester R. E. Genadi Algadri GESTEN HAZERI GIYANTO GIYANTO GIYANTO GIYANTO Hagus Tarno Haqqy Rerian Erlangga Hardianti, Aprilia Hari, Restu Fajar Hawis MADDUPPA HAWIS MADDUPPA HAWIS H MADDUPPA HAWIS H MADDUPPA Hawis H Madduppa HAWIS H. MADDUPPA HAWIS H. MADDUPPA HAWIS H. MADDUPPA Hawis Madduppa Hawis Madduppa HAWIS MADDUPPA Hawis Madduppa HEDI INDRA JANUAR HERDIAN WICAKSONO Herettrenggi, Rosa Hermansyah Amir, Hermansyah Husna, Alief K I WAYAN NURJAYA I Wayan Nurjaya Idham A. Nasrullah Ikbal Marus Ikbal Marus Ikbal Marus, Ikbal Ilham, Yuwanda INDRA PUTRA ALMANAR INNA PUSPA Irianda, Nadya Jeny Irmalita Tahir Irmalita Tahir Irmalita Tahir, Irmalita Irnin Agustina Dwi Astuti Islami, Nurfara Ismail, Firdaut Iswandi Wahab Iswandi Wahab Jansit, Afifah F. Jeddah Isnul Jelita Rahma Hidayati Jhoni Wahyu Adi Joko Santoso Junaedy, Ahmad Kahar, Fauzi Abdul Karizma Fahlevy Kesha Mufthi Java Tanaya Khairudi, Denny Kintani, Novia Indah KUNCORO, IWAN - KUSTIARIYAH TARMAN Kusumarani, Dheni L.M. IQBAL MUKSIN LALANG LALANG Lalu M Iqbal Sani LALU M. IQBAL SANI Lalu M. Iqbal Sani Lalu M. Iqbal Sani Lane, Christopher LUDI PARWADANI AJI LUDI PARWADANI AJI Luzmi Malia Izza M. Janib Achmad Maestro Munru Mai Efdi Majariana Krisanti Malaihollo, Jantje Jacobus Manafi, Efi Noferya MAREIKE HUHN Mas Irfanto Masyerli, Scify Bilqis Nawafi Meutia Samira Ismet Meutia Samira Ismet Minsaris, La Ode Alam Miswandi, Muhammad Mochamad Untung Kurnia Agung Mohamad Gazali Mohammad Mukhlis Kamal Muhamad Gilang Arindra Putra Muhamad Gilang Arindra Putra Muhamad Iqbal MUHAMMAD ABRAR MUHAMMAD ABRAR Muhammad Iqbal Muhammad Irfan Muhammad Izzat Nugraha Muhammad Janib Achmad Muhammad Taufik Muhammad Yusuf Muhandis Shidqi Munru, Maestro MUTIARA KRISTINA MARGARETHA Muttaqin, Ahmad Sabilul Mu’min Mu’min N Natih, Nyoman Metta N, Furqan Nadya Cakasana Nadya Jeny Irianda Najamuddin Najamuddin Najamuddin Najamuddin, Najamuddin Nasrul Aziz Nebuchad Nezzar Akbar Nebuchadnezzar Akbar Nebuchadnezzar Akbar NEVIATY P. ZAMANI Neviaty P. Zamani NEVIATY P. ZAMANI NEVIATY PUTRI ZAMANI NEVIATY PUTRI ZAMANI NEVIATY PUTRI ZAMANI Neviaty Putri Zamani Neviaty Putri Zamani NEVIATY PUTRI ZAMANI NI KADEK DITA CAHYANI Ni Kadek Dita Cahyani, Ni Kadek Dita NI WAYAN PURANAMASARI NI WAYAN PURNAMA SARI Niken TM Pratiwi Nor Jannah, Nor Novriyandi Hanif Nur Ari Bayu Nurlisa Alias Butet Nurlita Anggraini NURLITA P ANGGRAINI NURLITA PUTRI ANGGRAINI Nurlita Putri Anggraini Nurlita Putri Anggraini Nurlita Putri Anggraini NURLITA PUTRI ANGGRAINI Nurlita Putri Anggraini Nyoman M N Natih Nyoman Metta N Natih Nyoman Metta N Natih NYOMAN METTA N. NATIH P. JOANA DIAS Paembonan, Rustam E Prakas Santoso Prakas Santoso Prakas Santoso Prakas Santoso Prehadi . Prehadi Prehadi PREHADI PREHADI Prehadi, Prehadi Purwanto, Budi Rachma ati, Rita Radixa Radhya Ramadhan Haryanto RADIXA RADYA RAMADHAN HARYANTO Rahamadya, Aldiano Rahimah, Insaniah RAHMAD RAHMAD Rahman Rahman Rahmat Hidayat Rahmat, Fadhlan Basiluddin Raismin Kotta Raissha Amanda Siregar Ramadian Bachtiar Ramili, Yunita Rani Utari Ayuningtyas Rasidi Rasidi Raunsai, Jhoni Elias Raweyai, Oktofianus Obaja Restu, Yunan Gilang Ridha Fathihatunnisa RIDHO Z. WICAKSONO RIKOH MANOGAR SIRINGORINGO RIKOH MANOGAR SIRINGORINGO Risandi Dwirama Putra RISKI FADILLAH RITA RACHMAWATI RITA ANDINI Rita Andini Rita Andini Riyadi Subur Riyadi Subur, Riyadi Rommy M. Abdullah Rotinsulu, Dordia Anindita Rustam E Paembonan Rustam E Paembonan Rustam E Paembonan Rustam E Paembonan Rustam E Paembonan Rustam Effendi Paembonan Rustam Effendi Paembonan, Rustam Effendi Ryan Adhitia Muslim Safika S, Safika Salim Abubakar Samira Ismet, Meutia Samsuardi Samsuardi, Samsuardi Sani, L. Mukhsin Iqbal Sani, Lalu M Iqbal Sani, Lalu M. Iqbal Sani, Lalu Mukhsin Iqbal Santoso Budi Widiarto Satya Pratama Atmaja Sebastian C. A. Ferse Sebastian Ferse SEKAR MIRA HERANDARUDEWI Setiamarga, Davin H. E. Siolimbona, Abdul Ajiz SITI KHODIJAH Siti Maysaroh Siti Maysaroh SLAMET WAHYUDI Sombo, Hendrik SUKANDAR SUKANDAR Sukandar Sukandar Sukandar, Mr. SUKMARAHARJA A. TARIGAN Syafrizayanti, Syafrizayanti Syahid SYAMSUL BAHRI AGUS Syamsul Bahri Agus, Syamsul Bahri TRI PRARTONO TRI PRARTONO Tumpak Sidabutar Ulandari, Rafika Wahab, Iswandi Wedi Andika Wibowo, Eko S Wibowo, Eko Setyobudi Wiwid Andriyani Lestariningsih Yahya, Rodhiyah Yennafri, Yennafri Yidoatimojo, Sudibyo Yoga Budi Bhakti yoman Metta N Natih Yosie Andriani Yudha, Firsta Kusuma Yuliana Fitri Syamsuni Yusli Wardiatno Zamani, Nevyati P. Zedta, Raymon Rahmanov ZULFANDRA BACHRUL KALAM Zulham Apandy Harahap Zulhan Arifin Harahap