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INDONESIA
Jurnal Kelautan : Indonesian Journal of Marine Science and Technology
Published by Universitas Trunojoyo Madura
ISSN : 19079931     EISSN : 24769991     DOI : -
Core Subject :
This journal encompasses original research articles, review articles, and short communications, including: Marine and fisheries ecology and biology, Marine fisheries, Marine technology, biotechnology, Mariculture, Marine processes and dynamics, Marine conservation, Marine pollution, Marine and coastal resource management, Marine and fisheries processing technology, Salt technology, Marine geology, physical and chemical oceanography.
Arjuna Subject : -
Articles 394 Documents
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Rancang Bangun Alat Ukur Potensi Gelombang Laut Dengan Metode Superposisi Gelombang Kahfi, Ahmad Khairul; Arini, Nu Rhahida; Sesulihatien, Wahjoe Tjatur
Jurnal Kelautan Vol 18, No 2: Agustus (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.v18i2.30124

Abstract

ABSTRACTBanyak perangkat maritim, seperti sistem navigasi kapal dan Pembangkit Listrik Tenaga Gelombang Laut (PLTGL), sangat bergantung pada data karakteristik gelombang laut. Beberapa alat ukur karakteristik gelombang laut telah dijual di pasaran, namun tidak terjangkau dan sulit dioperasikan. Penelitian ini bertujuan untuk merancang dan membangun alat ukur ketinggian gelombang laut berbasis pengolahan sinyal menggunakan metode Fast Fourier Transform (FFT) dan prinsip superposisi. Sistem pengukuran menggunakan sensor Inertial Measurement Unit (IMU) yang merekam data percepatan secara real-time. Data tersebut kemudian dianalisis untuk mengekstrak parameter utama gelombang, termasuk tinggi gelombang, frekuensi, dan kecepatan rambat gelombang. Eksperimen dilakukan di fasilitas wave generator selama 5 menit dengan frekuensi pengambilan data sebesar 25 Hz. Hasil eksperimen menunjukkan kondisi gelombang uji pada frekuensi motor 25 Hz mempunyai tinggi gelombang air sebesar 1 cm. Hasil pengukuran dibandingkan dengan pengukuruan/pengamatan visual di kolom wave generator menunjukkan perbedaan pengukuran sebesar 2% dengan frekuensi dominan yang didapatkan berada di 3,2 Hz yang didapatkan dari amplitudo dominan di sinyal domain waktu. Studi ini diharapkan dapat berkontribusi dalam perkembangan teknologi maritim dalam mendukung sektor pelayaran dan energi terbarukan berbasis kelautan di Indonesia.Kata Kunci: Ketinggian Gelombang, FFT, Gelombang Superposisi, Karakteristik Gelombang, Sensor IMU.ABSTRAKMany maritime devices, such as ship navigation systems and Wave Ocean Power Plants, rely heavily on data on ocean wave characteristics. Several water wave characteristic measuring instruments have been sold on the market, but not affordable and difficult to operate. The aim of this study is to design and build a wave height measuring instrument based on signal processing using the Fast Fourier Transform (FFT) method and the superposition wave. The measurement system uses an Inertial Measurement Unit (IMU) sensor that records acceleration data in real time. The data is analyzed to extract the main parameters of the wave, including wave height, frequency, and wave propagation speed. The experiment is conducted at the wave generator facility for 5 minutes with a data collection frequency of 25 Hz. The results of the experiment show that the test wave conditions at a motor frequency of 25 Hz had a water wave height of 1 cm. The measurement results compared with the visual measurement/observation in the wave generator column show a measurement difference of 2%, with the dominant frequency obtained being 3.2 Hz, derived from the dominant amplitude in the time domain signal. This study is expected to contribute to the development of maritime technology in supporting the shipping and marine-based renewable energy sectors in Indonesia.Keywords: FFT, IMU Sensor, Superposition Wave, Wave Characteristic, Wave Height
Identifikasi Holothuria atra pada Ekosistem Lamun di Pulau Cemara Kecil Taman Nasional Karimunjawa Istiqomah, Ayu; Suryanti, Suryanti; Muskananfola, Max Rudolf; Nisak, Yuyun Khoirun
Jurnal Kelautan Vol 18, No 2: Agustus (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.v18i2.22492

Abstract

ABSTRAKEchinodermata termasuk komponen keanekaragaman hayati yang berperan penting dalam ekosistem. Penelitian ini bertujuan untuk mengetahui morfologi, anatomi, habitat, serta hubungan antara faktor fisika kimia perairan terhadap jumlah Holothuria atra di perairan Pulau Cemara Kecil Taman Nasional Karimunjawa. Metode dalam penelitian ini yaitu metode observasi dengan analisis statistik kuantitatif. Metode observasi merupakan metode yang digunakan untuk menganalisis sampel di lapangan serta di laboratorium. Penentuan stasiun secara systematic random sampling dengan mempertimbangkan keberadaan ekosistem padang lamun sebagai habitat utama teripang. Sampel teripang diidentifikasi dan sampel sedimen dilakukan analisis butir sedimen. Analisis kuantitatif dilakukan guna mengetahui pengaruh tutupan lamun terhadap kelimpahan teripang. Hasil penelitian menunjukkan bahwa ditemukan spesies Holothuria atra dengan tubuh berbentuk bulat dengan warna hitam terdiri atas mulut, tentakel, faring, esofagus, stomach, usus, gonad, cloaca, dan anus. Berat tubuh teripang yang ditemukan yaitu 192 - 411 gram, panjang tubuh 17 - 23 cm, lebar badan 4 - 7,6 cm, dan panjang ususnya 68,58 - 78,8 cm. Habitat dari teripang Holothuria atra berupa sedimen berpasir kasar (0,5 mm) yaitu sebesar 54 % dan pasir halus (0,125 mm) 44,9%. Hubungan antara kelimpahan teripang dengan nilai tutupan lamun didapatkan nilai koefisien determinasi sebesar 0,024 termasuk kategori lemah dan koefisien korelasi sebesar 0,15 termasuk kategori sangat lemah. Sedangkan parameter kualitas air optimal untuk pertumbuhan teripang dan lamun.Kata kunci: Echinodermata,  Holothuria atra,  Kelimpahan, Lamun, Teripang.ABSTRACTEchinoderms are one of components of marine biodiversity that play an important role in ecosystem function.This study aims to determine the morphology, anatomy, habitat, and relationship between physical, chemical factors in the waters and the number of Holothuria atra Cemara Kecil Island, Karimunjawa National Park. The method in this study is the observation method with quantitative statistical analysis. The observation method is a method used to analyze samples in the field and in the laboratory. Determination of stations by systematic random sampling by considering the the existence of seagrass ecosystems as the main habitat of sea cucumbers. Sea cucumber samples were identified and sediment samples were analyzed for sediment grains. Quantitative analysis was conducted to determine of seagrass cover influence on sea cucumber abundance.The results showed that the species Holothuria atra was found with a round body with a black color consisting of a mouth, tentacles, pharynx, esophagus, stomach, intestines, gonads, cloaca and anus. The body weight 192-411 grams, body length of 17-23 cm, body width 4-7.6 cm, and intestine length in the range of 68.58-78.8 cm. The habitat of the sea cucumber Holothuria atra is coarse sand (0.5 mm) sediment which is equal to 54% and fine sand (0.125 mm) 44.9%. The relationship between revealing sea cucumbers and the seagrass cover value obtained a determination coefficient value of 0.024 including the weak category and a correlation coefficient of 0.15 including the very weak category. Meanwhile, air quality parameters are optimal for the growth of sea cucumbers and seagrass.Keywords: Abundance; Echinodermata, Holothuria atra, Seagrass, Sea Cucumber.
Potensi Antifouling Ekstrak Teripang (Phyllophorus sp.) Terhadap Bakteri Biofilm Di Beton Perairan Jembatan Suramadu Arnanda, Nisya; Maisaroh, Dian Sari; Perdanawati, Rizqi Abdi
Jurnal Kelautan Vol 18, No 2: Agustus (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.v18i2.27332

Abstract

ABSTRAKPenempelan biota pada permukaan beton diawali dengan tahapan penempelan koloni bakteri dan mikroalga (biofilm). Fenomena ini terjadi pula pada beton di jembatan Suramadu. Biofilm yang nantinya berkembang menjadi makrofouling rentan menimbulkan kerusakan sehingga diperlukan upaya untuk menghambat penempelan biofilm. Penelitian ini bertujuan untuk menganalisa kemampuan antifouling ekstrak teripang (Phyllophorus sp.) terhadap biofilm yang muncul di perairan jembatan Suramadu. Pengambilan sampel biofilm didapatkan dari permukaan rendaman beton di perairan jembatan Suramadu. Tahapan penelitian dimulai dari identifikasi bakteri biofilm secara morfologi, pembuatan ekstrak teripang dan pengujian antifouling dengan uji fitokimia dan uji zona hambat. Uji zona hambat ekstrak teripang (Phyllophorus sp.) dilakukan dengan hasil rendemen sebesar 5,64% dengan 2 variasi ekstrak uji yaitu 100% ekstrak dan 50% ekstrak. Bakteri biofilm diketahui terdiri dari bakteri gram positif kokus, gram positif basil, gram negatif kokus dan tidak ditemukan gram negatif basil. Hasil uji fitokimia sebagai agen antifouling yang dapat menghambat pertumbuhan biofilm antara lain fitokimia alkaloid, flavonoid dan terpernoid. Tingkat hambat ekstrak dengan kategori kuat ditemukan pada variasi ekstrak 100% yaitu 2,34–10,92 mm pada 5 isolat, pada ekstrak 50% zona hambat pada kategori lemah. Hasil ini menunjukkan adanya potensi penggunaan ektrak teripang (Phyllophorus sp.) terhadap biofilm yang muncul di perairan jembatan Suramadu.Kata kunci: Antifouling, Biofilm, Biofouling, Ekstrak Teripang, Jembatan SuramaduABSTRACTBiofouling on the concrete surface begins with the adhesion of bacterial and microalgae colonies (biofilm). This phenomenon also occurs on the concrete of the Suramadu Bridge. Biofilms, which eventually develop into macrofouling, are prone to causing damage, necessitating efforts to inhibit biofilm attachment. This study aims to analyze the antifouling potential of sea cucumber extract (Phyllophorus sp.) against biofilms found in the waters of the Suramadu Bridge. Biofilm samples were obtained from the surface of concrete submerged in the waters around the Suramadu Bridge. The research stages included the morphological identification of biofilm bacteria, preparation of sea cucumber extract, and antifouling testing through phytochemical analysis and inhibition zone tests. The inhibition zone test of the sea cucumber extract (Phyllophorus sp.) yielded a 5.64% extract with two variations tested: 100% extract and 50% extract. The biofilm bacteria were identified as gram-positive coccus, gram-positive bacilli, gram-negative coccus, but none of gram-negative bacilli found. The phytochemical analysis indicated that alkaloids, flavonoids, and terpenoids in the extract served as antifouling agents capable of inhibiting biofilm growth. A strong inhibition was observed in the 100% extract variation by the diameter 2,34 – 10,92 mm for 5 isolats, while the 50% extract showed weak inhibition. These results demonstrate the potential use of sea cucumber extract (Phyllophorus sp.) in controlling biofilm formation in the waters surrounding the Suramadu Bridge..Keyword: Antifouling, Biofilm, Biofouling, Sea Cucumber Extract, Suramadu Bridge
Analisis Pengaruh Tekanan Udara, Kelembaban, dan Suhu Udara terhadap Curah Hujan di Kota Bengkulu selama El Niño 2023 Wahyuni, Ani Sri; Edkayasa, Mardho Tillah; Johan, Septi; Norfahmi, Siti Hairunnisa; Lizalidiawati, Lizalidiawati
Jurnal Kelautan Vol 18, No 2: Agustus (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.v18i2.29965

Abstract

ABSTRAKFenomena El Niño sangat memengaruhi dinamika atmosfer, meliputi variabel seperti tekanan udara, kelembaban, dan suhu, sehingga memengaruhi pola presipitasi di Kota Bengkulu. Penelitian ini bertujuan untuk mengetahui hubungan antara tekanan udara, kelembaban udara, dan suhu udara terhadap pola curah hujan dari tahun 2019 hingga 2023, dengan fokus pada fenomena El Niño yang terjadi pada tahun 2023. Data diperoleh dari Stasiun Klimatologi Bengkulu dan Stasiun Meteorologi Fatmawati Soekarno, serta data Oceanic Niño Index (ONI) dari NOAA. Penelitian ini menggunakan metodologi deskriptif dan analisis regresi linier berganda, yang dilakukan dengan menggunakan Microsoft Excel. Hasil penelitian menunjukkan bahwa terdapat korelasi yang signifikan antara suhu udara, tekanan udara, dan kelembaban udara di Stasiun Klimatologi, dengan koefisien korelasi sebesar 0,54. Sebaliknya, parameter cuaca di Stasiun Meteorologi memiliki koefisien korelasi yang lebih rendah, yaitu 0,42. Hasil ini menyatakan bahwa adanya varians dalam hubungan antara variabel meteorologi tersebut di berbagai lokasi pengamatan. Hal ini mengonfirmasi bahwa El Niño menyebabkan penurunan curah hujan akibat meningkatnya suhu dan tekanan udara, serta berkurangnya kelembaban. Penelitian ini berpotensi menyediakan kerangka dasar untuk mengurangi dampak buruk kekeringan akibat perubahan iklim di wilayah Kota Bengkulu.Kata Kunci : Suhu Udara, Kelembaban, Tekanan, Curah Hujan, El Nino.ABSTRACTThe El Niño phenomenon significantly influences atmospheric dynamics, including factors like as air pressure, humidity, and temperature, hence impacting precipitation patterns in Bengkulu City. This study seeks to ascertain the correlation between air pressure, humidity, and temperature concerning rainfall patterns from 2019 to 2023, emphasising the El Niño phenomena of 2023. Data were acquired from the Bengkulu Climatology Station, the Fatmawati Soekarno Meteorology Station, and the Oceanic Niño Index (ONI) data provided by NOAA. This research employed a descriptive methodology and multiple linear regression analysis conducted via Microsoft Excel. The findings indicated a substantial association among air temperature, air pressure, and air humidity at the Climatology Station, with a correlation coefficient of 0.54. The Meteorology Station exhibited a lower correlation coefficient of 0.42 for the identical parameters. The results demonstrate variability in the correlation among these meteorological variables across different observation sites. The results indicate that El Niño leads to less precipitation owing to elevated temperature and air pressure, together with diminished humidity. This research may establish a foundational paradigm for alleviating the detrimental effects of climate change-induced droughts in coastal regions.Keywords: Air Temperature, Humidity, Pressure, Rainfall, El Nino.
Respon Suhu Permukaan Laut Dan Klorofil-A Saat Triple-Dip La Niña (2020–2023) Di Sulawesi Tenggara-Laut Banda Adrian, Muh Adhim; Asmadin, Asmadin; Takwir, Amadhan
Jurnal Kelautan Vol 18, No 2: Agustus (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAKFenomena triple-dip La Niña yang terjadi selama tiga tahun berturut-turut (2020–2023) merupakan peristiwa iklim global yang jarang terjadi dan berdampak signifikan terhadap dinamika oseanografi regional. Penelitian ini bertujuan untuk menganalisis variabilitas suhu permukaan laut (SPL) dan konsentrasi klorofil-a di perairan Sulawesi Tenggara hingga Laut Banda selama periode tersebut. Data SPL harian dan klorofil-a bulanan diperoleh dari Marine Copernicus dan dianalisis secara spasial-temporal menggunakan pendekatan statistik dan visualisasi musiman. Hasil menunjukkan bahwa selama La Niña berkepanjangan, SPL mengalami penurunan konsisten dan diikuti oleh fluktuasi klorofil-a yang menunjukkan peningkatan pada musim dan lokasi tertentu, terutama di wilayah pesisir dan perairan dangkal. Sementara itu, indeks ONI secara konsisten menunjukkan nilai negatif selama tiga tahun, mengonfirmasi keberadaan La Niña multiyear yang memperkuat sirkulasi atmosfer timur dan mendorong proses upwelling di wilayah studi. Temuan ini menegaskan pentingnya pemantauan berkelanjutan terhadap parameter oseanografis dan indikator iklim global dalam memahami dampak jangka panjang ENSO terhadap ekosistem laut tropis Indonesia.Kata Kunci: ENSO, klorofil-a, La Niña, ONI, suhu permukaan laut.ABSTRACTThe triple-dip La Niña phenomenon that persisted for three consecutive years (2020–2023) is a rare global climate event with significant impacts on regional oceanographic dynamics. This study aims to analyze the variability of sea surface temperature (SST) and chlorophyll-a concentration in the waters of Southeast Sulawesi to the Banda Sea during this period. Daily SST data and monthly chlorophyll-a data from Marine Copernicus were analyzed spatio-temporally using statistical approaches and seasonal visualization. The results reveal a consistent decrease in SST, accompanied by an increase in chlorophyll-a during specific seasons and locations, particularly in coastal and shallow waters. The Oceanic Niño Index (ONI) remained negative over the three years, confirming a multiyear La Niña that strengthened easterly atmospheric circulation and enhanced upwelling in the study area. These findings highlight the importance of long-term monitoring of oceanographic parameters and global climate indicators to better understand and anticipate the impacts of ENSO on tropical marine ecosystems in Indonesia.Keywords: ENSO, chlorophyll-a, La Niña, ONI, sea surface temperature.
Distrubution and Morphological Identification of Eel (Anguilla sp.) In Kayoa Sea, South Halmahera, North Maluku Achmad, M Janib; Akbar, Nebuchadnezzar; Samman, Ardan; Supyan, Supyan; Ismail, Firdaut; Samad, Julkar
Jurnal Kelautan Vol 18, No 2: Agustus (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.v18i2.27507

Abstract

North Maluku Province is an archipelagic province that has a sea area of 113,796.53 km2 or 70% of the land area. As an archipelagic area, North Maluku waters have high biodiversity. One of the important biota in North Maluku waters is the eel. Eel is one of the water resources that have high economic value, because of its nutritional contentEel (Anguilla sp) is a catadromous fish that begins its life in the larval or juvenile phase in marine waters and grows up in brackish and fresh waters. This study aims to determine the distribution of eel species (Anguilla sp) in the seas and the morphometric eel (Anguilla sp) in kayoa waters. The results showed that the number of eels found at both stations was 13 tails. The results of the morphological analysis showed that the type of eel found at both stations was A. marmorata, the morphometric identification results showed that at station 1, the total length range was 50 - 106 cm, with a weight of 460-4100 grams, while at station 2 obtained a length range of 65 cm - 83 cm, with a weight of 79 -1300 grams. Key Word: Area, Morphometri, Anguilla, Small Island, Tropis
Analisis Sebaran Kandungan Klorofil-a Dan Pendugaan Produktivitas Primer Di Perairan Situ Cisanti, Jawa Barat Alvetta, Della Rena; Hasan, Zahidah; Meyllianawaty, Fittrie; Herawati, Heti
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.v18i3.32526

Abstract

ABSTRAKSitu Cisanti merupakan salah satu ekosistem perairan di Provinsi Jawa Barat yang digunakan oleh masyarakat sekitar untuk berbagai aktivitas seperti perkebunan, pertanian, pariwisata, dan perikanan sehingga terjadi penurunan kualitas air di Situ Cisanti. Penelitian ini bertujuan untuk mengetahui sebaran kandungan klorofil-a sebagai penduga produktivitas primer di perairan Situ Cisanti. Penelitian ini dilaksanakan pada bulan Oktober – Desember 2024 menggunakan metode survei dengan teknik pengambilan sampel air dilakukan secara purposive sampling. Untuk analisis sampel menggunakan metode deskriptif komparatif. Parameter kualitas air yang diukur meliputi fisik kimiawi (suhu, kecerahan, pH, DO, CO₂, nitrat, dan fosfat) serta kandungan klorofil-a. Hasil penelitian menunjukkan bahwa konsentrasi klorofil-a di Situ Cisanti berkisar antara 0,019 – 2,603 mg/m³. Rata-rata kandungan klorofil-a paling tinggi terdapat pada stasiun 3 dikarenakan masukan nutrien yang diduga dari limbah domestik dan pertanian. Rata-rata nilai produktivitas primer yang didapat berkisar antara 120,45 hingga 280,32 mgC/m³/hari. Berdasarkan nilai produktivitas primer yang didapat selama riset menunjukan produktivitas primer di Situ Cisanti termasuk rendah, dengan status kesuburan oligotrofik. Kualitas air di Situ Cisanti secara umum memenuhi syarat baku mutu kelas II dan III menurut Peraturan Pemerintah No 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup.Kata Kunci: Kualitas air, Klorofil-A, Produktivitas primer, Situ CisantiABSTRACTSitu Cisanti is one of the aquatic ecosystems in West Java Province that is used by the surrounding community for various activities such as plantations, agriculture, tourism, and fisheries, resulting in a decline in water quality in Situ Cisanti. This study aims to determine the distribution of chlorophyll-a content as an indicator of primary productivity in the waters of Situ Cisanti. This study was conducted from October to December 2024 using a survey method with water sampling techniques carried out using purposive sampling. Descriptive comparative methods were used to analyze the samples. The water quality parameters measured included physical and chemical properties (temperature, brightness, pH, DO, CO₂, nitrate, and phosphate) and chlorophyll-a content. The results showed that the chlorophyll-a concentration in Situ Cisanti ranged from 0,019 to 2,603 mg/m³. The highest average chlorophyll-a content was found at station 3 due to nutrient inputs suspected to be from domestic and agricultural waste. The average primary productivity values obtained ranged from 120,45 to 280,32 mgC/m³/day. Based on the primary productivity values obtained during the research, primary productivity in Situ Cisanti is low, with oligotrophic fertility status. The water quality in Situ Cisanti generally meets the class II and III quality standards according to Government Regulation No. 22 of 2021 concerning the Implementation of Environmental Protection and Management.Keywords: Water quality, Chlorophyll-a, Primary Productivity, Situ Cisanti
Estimasi Cadangan Karbon Lamun Di Pantai Rumaat, Pulau Kei Maluku Tenggara Silaban, Rosita; Dobo, Johny; Armin, Armin; Wakole, Marisa Rovina
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.v18i3.32295

Abstract

ABSTRAKKenaikan karbon menyebabkan terjadinya pemanasan global yang berakibat perubahan iklim berupa fluktuasi curah hujan yang tinggi dan kenaikan muka laut. Lamun menjadi salah satu tumbuhan laut berkemampuan menyerap dan memindahkan jumlah besar karbon dari atmosfir setiap harinya, dan mengendapkannya dalam jaringan atau sedimen untuk waktu yang lama, sehingga keberadaan lamun di bumi sangat diperlukan sebagai jasa dalam penyerapan karbon. Penelitian ini bertujuan mengetahui kerapatan lamun, frekuensi kehadiran, biomasa lamun, cadangan karbon dan parameter lingkungan. Pengambilan sampel menggunakan metode line transek kuadrat. Lamun sebanyak 8 spesies ditemukan pada perairan Rumaat. Kerapatan lamun tertinggi berasal dari spesies Thalassia hemprichii sebanyak 5974 ind/m2. Frekuensi kehadiran Enhalus acoroides sebanyak 93,53% lebih tinggi dibandingkan spesies lainnya. Enhalus acoroides memiliki biomassa tertinggi sebesar 75.871,2 (g/m2) dan didominasi pada bagian bawah substrat. Lamun Enhalus acoroides memiliki total kadar abu 92,38% dan total kandungan organik 220,96% lebih dibanding spesies lainnya serta cenderung tinggi pada bagian bawah substrat. Cadangan karbon lamun di lokasi penelitian cukup tinggi terutama dari spesies Enhalus acoroides sebesar 1,04 ton. Paramater lingkungan di lokasi penelitian diperoleh suhu 32°C, salinitas 30 ‰, pH 8 dan DO 8 mg/l dan dapat dikategorikan cocok bagi pertumbuhan lamun.Kata kunci:  karbon, lamun, rumaatABSTRACTThe increase in carbon causes global warming which results in climate change in the form of high rainfall fluctuations and sea level rise. Seagrass is one of the marine plants that can absorb and transfer large amounts of carbon from the atmosphere every day, and deposit it in tissues or sediments for a long time, so that the existence of seagrass on earth is very necessary as a service in carbon absorption. This research aims to determine seagrass density, frequency of presence, seagrass biomass, carbon reserves and environmental parameters. Sampling used the quadratic line transect method. As many as 8 species of seagrass are found in Rumaat waters. The highest seagrass density came from the Thalassia hemprichii species at 5974 ind/m2. The frequency of presence of Enhalus acoroides was 93.53% higher than other species. Enhalus acoroides had the highest biomass of 75,871.2 (g/m2) and was dominated at the bottom of the substrate. The seagrass Enhalus acoroides has a total ash content of 92.38% and a total organic content of 220.96% more than other species and tends to be high at the bottom of the substrate. Seagrass carbon reserves at the research location are quite high, especially from the Enhalus acoroides species, amounting to 1.04 tonnes. The environmental parameters at the research location were temperature 32°C, salinity 30‰, pH 8 and DO 8 mg/l and could be categorized as suitable for seagrass growth.Keywords: carbon, seagrass, rumaat
Pemetaan Batimetri dan Morfologi Dasar Perairan Sendangbiru, Kabupaten Malang Setyoningrum, Desy; Setyawan, Fahreza Okta; Sianturi, Riswan Septriayadi; Syananta, Citra; Nurshokh, Siti Al Khumairoh Annadziroh; Faqih, Decha Satria Ibnu; Prasetyo, Agung Wahyudi; Aryasatya, Naufal Fidel Satria
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.v18i3.28860

Abstract

ABSTRAKPerairan Sendang Biru, Kabupaten Malang, merupakan salah satu jalur pelayaran tersibuk di pesisir selatan Jawa, terutama saat puncak musim penangkapan ikan pada bulan Agustus hingga Oktober. Aktivitas pelayaran dan perikanan intensif di wilayah ini memerlukan data batimetri yang akurat untuk mendukung keselamatan navigasi dan pengelolaan perairan. Penelitian ini bertujuan untuk memetakan kontur batimetri dan mengidentifikasi morfologi dasar laut di Perairan Sendang Biru menggunakan metode pemeruman dengan Single Beam Echosounder (SBES). Pengambilan data dilakukan pada bulan Oktober 2024 dengan interval jalur pemeruman sejauh 50 meter, menghasilkan data kedalaman yang dikoreksi terhadap pasang surut menggunakan Metode Admiralty. Pengolahan data pasang surut dilakukan berdasarkan konstanta harmonik untuk menentukan nilai elevasi penting, seperti HHWL, MHWL, MSL, MLWL, dan LLWL. Hasil analisis menunjukkan tipe pasang surut di Perairan Sendang Biru adalah tipe campuran dominan ganda dengan bilangan Formzahl sebesar 0,31744. Hasil penelitian menunjukkan bahwa kedalaman perairan berkisar antara 1 meter hingga 36 meter. Morfologi dasar laut didominasi oleh lereng landai dengan beberapa area lereng curam yang tersebar di bagian selatan dan barat daya perairan. Selain itu, terdapat beberapa wilayah yang teridentifikasi sebagai potensi pengendapan sedimen di area dangkal. Berdasarkan hasil penelitian ini, memberikan informasi penting bagi penataan alur pelayaran dan area tambat do Pelabuhan Pondokdadap, terutama karena kontur kedalaman yang bervariasi dan keberadaan zona potensi sedimentasi di area dekat pantaiKata kunci: Pemetaan Batimetri; Perairan Sendangbiru; Single Beam Echosounder (SBES); Survey Hidrografi.ABSTRACTThe waters of Sendang Biru, Malang Regency, are among the busiest shipping routes along the southern coast of Java, especially during the peak fishing season from August to October. The intensive shipping and fishing activities in this area require accurate bathymetric data to support navigation safety and water management. This study aims to map bathymetric contours and identify the seabed morphology in the waters of Sendang Biru using a hydrographic survey method with a Single Beam Echosounder (SBES). Data collection was conducted on October  2024, with survey line intervals of 50 meters, producing depth data corrected for tidal variations using the Admiralty Method.Tidal data processing was carried out based on harmonic constants to determine critical elevation values such as HHWL, MHWL, MSL, MLWL, and LLWL. The analysis results indicate that the tidal type in the waters of Sendangbiru is a mixed predominantly semidiurnal type, with a Formzahl number of 0.31744. The study results show that water depths range from 1 meter to 36 meters. The seabed morphology is dominated by gentle slopes with some steep slope areas scattered in the southern and southwestern parts of the waters. Additionally, several areas were identified as potential sediment deposition zones in shallow areas. This findings provide essential information for planning navigation routes and mooring areas at Pondokdadap Port, particularly considering the variable depth contours and presence of sedimen-accumulation zone near the coastline. Keywords: Bathymetric Mapping; Single Beam Echosounder (SBES); Sendang Biru Waters; Hydrographic Survey
Sebaran Suhu Permukaan Laut Di Perairan Selat Ombai Menggunakan Data Citra Satelit Aqua MODIS Maulana, Gilang; Situmorang, Raymundus Putra; Afrizal, Muhammad; Ismail, Masrurah; Sitanggang, Wanri; Alamsah, Safingi; Pramudya, Herning; Daud, Moh Ramadan
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.v18i3.31623

Abstract

ABSTRAKSuhu permukaan laut (SPL) adalah salah satu data oseanografi yang dapat berguna dalam memantau perubahan lingkungan yang terjadi di laut. Upaya dalam pemantauan suhu permukaan laut dapat memanfaatkan teknologi pengindraan jauh salah satunya dengan memanfaatkan citra satelit aqua-MODIS. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana sebaran suhu permukaan laut (SPL) di perairan selat ombai provinsi Nusa Tenggara Timur pada tahun 2024. Metode Penelitian yang digunakan adalah dengan memanfaatkan data bulanan suhu permukaan laut (SPL) pada tahun 2024 hasil citra satelit aqua-Modis. Hasil penelitian ini, sebaran suhu permukaan laut tertinggi di selat ombai terjadi pada bulan Juni dengan suhu 33,77°C dan sebaran suhu permukaan laut terendah terjadi pada bulan Juli dengan suhu 26,55 °C dan rata rata suhu bulanan pada tahun 2024 sebesar 29,52°C. Kesimpulan penelitian ini adalah Sebaran Suhu Permukaan Laut di Perairan Selat Ombai Sangat bervariasi karena dipengaruhi faktor iklim dan cuaca serta faktor faktor pendukung lainnya.Kata kunci: Suhu Permukaaan Laut, Selat Ombai, Aqua-MODISABSTRACTSea surface temperature (SST) is one of the oceanographic data that is useful for monitoring environmental changes that occur in the ocean. Efforts to monitor sea surface temperature can utilize remote sensing technology, one of which is by utilizing aqua-MODIS satellite images. The purpose of this study is to find out how the distribution of sea surface temperature (SST) in the waters of the Ombai Strait, East Nusa Tenggara province in 2024. The research method used is to utilize monthly sea surface temperature (SST) data in 2024 from aqua-Modis satellite imagery. As a result of this study, the highest sea surface temperature distribution in the Ombai Strait occurred in June with a temperature of 33.77°C and the lowest sea surface temperature distribution occurred in July with a temperature of 26.55 °C and an average monthly temperature in 2024 of 29.52°C. The conclusion of this study is that the distribution of sea surface temperature in the waters of the Ombai Strait varies greatly because it is influenced by climatic and weather factors and other supporting factors.Keywords: Sea Surface temperature, Ombai Strait, Aqua-MODIS

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