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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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Salinity Distribution Pattern in Spermonde Waters Using Remote Sensing Data (Copernicus Marine Service) in 2022 Dwi Rosalina; Lalu Penta Febri Suryadi; Katarrina Hesty Rombe; Ani Leilani; Irwana Irwana; Rangga Bayu Kusuma Haris
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.24098

Abstract

ABSTRACTSalinity is the total concentration of ions found in water. Salinity is important for the survival of organisms. Almost all marine organisms can only live in areas that have small changes in salinity. The aim of this research is to determine the distribution pattern of salinity in Spermonde waters in 2022 and to find out a comparative picture of the salinity distribution pattern on Kapoposang Island, Samatellu Lompo Island, Kuninggareng Lompo Island and Lanyukang Island in Spermonde waters in 2022. This research was conducted from August to October 2023 in Hasanuddin University Makassar, Makassar City, South Sulawesi Province. Research was conducted at the Indraja Laboratory, Faculty of Marine and Fisheries Sciences. The data used was satellite image data, namely CMEMS satellite image. The pattern of salinity distribution in Spermonde Waters with an average value of 34.04 ppt is the highest salinity in August, and for the average value of salinity distribution of 32.52 ppt is in January. The comparison pattern of salinity distribution in 2022 on Kapoposang Island, Lanyukang Island, and Samatellu Lompo Island has the same average value, namely the lowest January and the highest August, except for Koninggarang Lompo Island the highest average value is in September and the lowest is in January.Keywords: Salinity, Kapoposang Island, Lanyukang Island, Koninggareng Lompo Island, Samatellu Lompo Island
Keanekaragaman Fitoplankton dan Kaitannya Dengan Kondisi Perairan di Senggarang Besar, Kota Tanjungpinang, Kepulauan Riau Efrina Yanti; Tri Apriadi; Andi Zulfikar
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.18184

Abstract

ABSTRACTThe existence of phytoplankton in water can provide information about the state of the waters. Changes in water quality can be seen from the abundance and composition of phytoplankton. The purpose of this study was to determine the diversity of phytoplankton, to determine the relationship between the abundance of phytoplankton and environmental conditions, to determine the quality of the waters based on the diversity of phytoplankton in Senggarang Besar. The research method used is a survey method. This study took 10 sampling points with the Systematic Random Sampling method. Data analysis used is an ecological index, multiple regression lines, correlation, and ANOVA. The diversity index value in the waters of Senggarang Besar Tanjungpinang City is in the low category, with the results of identifying phytoplankton from the whole weekly found 3 divisions with 21 genera, the three divisions include Bacillariophyta (18 genera), Dinophyta (2 genera), and Chlorophyta (1 genus). The parameter that has the highest correlation with the abundance of phytoplankton is the parameter of nitrate (NO3), while the comparison of the abundance of phytoplankton per week in Senggarang Besar waters shows that the combination between the first week and the second week is very significantly different, the combination of the first week with the third week is very significantly different and the combination is significantly different in the second and third week. Based on the saprobic index in Senggarang Besar waters, it is categorized into the class of oligosaprobic/very light organic matter pollution.Keywords: Diversity, Phytoplankton, Saprobic, Senggarang Besar Waters. ABSTRAKKeberadaan fitoplankton di suatu perairan dapat memberikan informasi mengenai keadaan perairan. Perubahan terhadap kualitas perairan dapat ditinjau dari kelimpahan dan komposisi fitoplankton. Penelitian ini dilakukan untuk mengetahui keanekaragaman fitoplankton, mengetahui kaitan antara kelimpahan fitoplankton dengan kondisi lingkungan dan kualitas perairan berdasarkan keanekaragaman fitoplankton di Senggarang Besar. Metode penelitian yang digunakan adalah metode survei. Penelitian ini mengambil 10 titik sampling dengan metode Sistematik Random Sampling. Analisis data yang digunakan yaitu indeks ekologi, regresi linier berganda, korelasi, dan ANOVA. Nilai indeks keanekaragaman di perairan Senggarang Besar Kota Tanjungpinang dalam kategori rendah, dengan hasil identifikasi fitoplankton dari keseluruhan perminggu ditemukan 3 divisi dengan 21 genera, ketiga divisi tersebut antara lain Bacillariophyta (18 genera), Dinophyta (2 genera), dan Chlorophyta (1 genus). Parameter yang berkorelasi paling tinggi terhadap kelimpahan fitoplankton adalah parameter nitrat (NO3). Perbandingan kelimpahan fitoplankton perminggu di Perairan Senggarang Besar menunjukkan bahwa kombinasi antara minggu pertama dan minggu kedua berbeda sangat nyata, kombinasi minggu pertama dengan minggu ketiga berbeda sangat nyata dan kombinasi pada minggu kedua dan minggu ketiga berbeda nyata. Berdasarkan indeks saprobik di perairan Senggarang Besar terkategori ke dalam golongan pencemaran bahan organik Oligosaprobik/sangat ringan.Kata kunci: Fitoplankton, Keanekaragaman, Perairan Senggarang Besar, Saprobik 
Chlorophyl-a Distribution and Sea Surface Temprature Using Modis Aqua Image Data in Bone Bay Waters Dwi Rosalina; Lalu Penta Febri Suryadi; Ani Leilani; Suci Puspita Sari; Mustafa Mustafa; Yakub Suleman; Khairul Jamil; Agus Surachmat; Maharani Maharani
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.24100

Abstract

ABSTRACTOne of the parameters determining productivity in the sea is chlorophyll-a. The fertility level of chlorophyll-a is closely related to the concentration of chlorophyll-a. The higher the concentration of chlorophyll-a, the higher the water fertility level, conversely, if chlorophyll-a is low, the water fertility level will also be low. One factor influencing growth rate and chlorophyll-a production is temperature. This research aimed to determine the distribution of chlorophyll-a and sea surface temperature based on season in 2022 in the waters of Bone Bay using quantitative descriptive method and geographic information analysis (GIS) procedure in the form of analysis of Aqua MODIS remote sensing image data. The research results showed that the highest distribution of chlorophyll-a occurred in the east season with a concentration of 0.06-2.04 mg/m³, while the lowest distribution of chlorophyll-a occurred in the west season with a concentration of 0.07-1.76 mg/m³. Meanwhile, the highest intensity sea surface temperature distribution occurred in the west season, which was 28.76-37.09 °C and the lowest sea surface temperature distribution fell in the east season, which was 27.13-33.62 °C. Spatial temperature variability and sea surface chlorophyll-a can be used as information about potential areas for fishing grounds.Key words: chlorophyll-a distribution, sea surface temperature, Bone Bay, Aqua MODIS
Application of Bandpass Filter Method on Single Channel 2D Seismic Data in Krakatau Waters Fredrich Simanungkalit; Henry Manik; Haqqu Ramdhani
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.20539

Abstract

ABSTRAKSeismik menjadi salah satu metode yang menggunakan akustik kelautan untuk mengetahui struktur di bawah permukaan laut. Penampang seismik hasil akuisisi data biasanya terdapat noise yang merupakan gelombang atau sinyal yang tidak dikehendaki dan harus dibuang dari data utama. Untuk mengidentifikasi noise pada data seismik tersebut, dalam penelitian ini digunakan fungsi FFT atau Fast Fourier Transform. Penelitian ini bertujuan untuk memisahkan sinyal akustik objek dan noise pada data seismik dengan menggunakan fungsi FFT dan metode Bandpass Filter pada data SeismicSingle Channel 2D di Perairan Krakatau. Akuisisi data seismik yang digunakan pada penelitian ini menggunakan peralatan single-channel high resolution Seismic berupa EGG Multi Electrode Sparker dan hidrofon 16 elemen merek EGG sebagai receiver. Pengolahan data seismik dalam bentuk .segy pada penelitian ini menggunakan perangkat lunak Seisee dan Matlab. Frekuensi tepi optimal pada penelitian ini berkisar antara 7 Hz hingga 29 Hz, dan frekuensi 2400 Hz untuk tepi atas. Frekuensi cut-off optimal bergantung pada nilai frekuensi pada tiap trace dengan nilai frekuensi cut-off bawah menggunakan frekuensi pada kisaran 200 Hz hingga 400 Hz dan nilai frekuensi cut-off atas menggunakan frekuensi 1500 Hz. Kata kunci:  Bandpass Filter, FFT, Frekuensi, Noise, Seismik.ABSTRACTSeismic is one method that uses marine acoustics principle to determine the structure below the sea surface. Seismic cross-sections resulting from data acquisition usually contain noise which is an unwanted wave or signal and must be removed from the main data. To identify noise in the seismic data, this study used the Fast Fourier Transform. This study aimed to separate the object's acoustic signal and noise in seismic data by using the FFT function and Bandpass Filter method on single channel 2D seismic data in Krakatau waters. Seismic data acquisition used in this study was a single-channel high resolution seismic form of EGG Multi Electrode Sparker and EGG 16 elements hydrophone as receiver. Seismic data processing in the form of *.segy in this study were Seisee and Matlab software. The optimal edge frequency in this study ranges from 7 Hz to 29 Hz, and the frequency was 2400 Hz for the top edge. The optimal cut-off frequency depends on the frequency value in each trace, with the lower cut-off frequency value using a frequency in the range of 200 Hz to 400 Hz and the upper cut-off frequency value using a frequency of 1500 Hz.Keywords: Bandpass Filter, FFT, Frequency, Noise, Seismic
Pemetaan Habitat Bentik Berbasis Objek Menggunakan Drone Di Perairan Pulau Gili Labak, Sumenep Adhitya Nugroho; Bisma Nababan; James Parlindungan Panjaitan; Syamsul Bahri Agus
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.24518

Abstract

ABSTRAKPemetaan habitat bentik menggunakan drone memiliki kendala terkait kodisi cuaca dan lingkungan, seperti kecepatan angin dan sun glint yang dapat mengganggu pengambilan gambar dan klasifikasi gambar. Penelitian ini bertujuan untuk mengetahui sudut sensor drone yang optimal, waktu penerbangan drone terbaik di lokasi penelitian, serta mengetahui tingkat akurasi algoritma support vector machine menggunakan metode OBIA. Penelitian ini dilaksanakan di perairan Pulau Gili Labak pada bulan Oktober 2022 menggunakan drone DJI Phantom 4. Penelitian ini menerapkan dua sudut sensor 45° dan 90° serta waktu pengambilan pukul 08:00; 09:30; 13:15; 14:45. Klasifikasi citra drone menggunakan metode OBIA menggunkan metode contextual editing pada level 1 (perairan dangkal). Level 2 menggunakan klasifikasi terbimbing menggunakan algoritma klasifikasi machine learning yaitu support vector machine (SVM) dengan input themathic layer dari data lapangan. Klasifikasi habitat bentik dilakukan pada 6 kelas dengan penerapan skala segmentasi 25, 50, 70, 100. Berdasarkan hasil  pengambilan gambar waktu terbaik menerbangkan drone pada pukul 13:15 menggunakan sudut sensor 90º dilokasi penelitian, diperoleh nilai overall accuracy sebesar 84.06% serta nilai kappa 0.78656 pada skala segmentasi 50 dengan algoritma support vector machine.Kata kunci: pemetaan, habitat bentik, OBIA, drone, Pulau Gili LabakABSTRACTBenthic habitat mapping using drones has constraints related to weather and environmental conditions, such as wind speed and sun glint that can interfere with image capture and image classification. This study aims to determine the optimal drone sensor angle, the best drone flight time at the research location, and determine the accuracy of the support vector machine algorithm using the OBIA method. This research was conducted in the waters of Gili Labak Island in October 2022 using a DJI Phantom 4 drone. This research applied two sensor angles of 45° and 90° and the capture time at 08:00; 09:30; 13:15; 14:45. Classification of drone imagery using the OBIA method utilizes contextual editing at level 1 (shallow water). Level 2 uses guided classification using a machine learning classification algorithm, namely support vector machine (SVM) with themathic layer input from field data. Benthic habitat classification was performed on 6 classes with the application of segmentation scales of 25, 50, 70, 100. Based on the results of taking pictures of the best time to fly the drone at 13:15 using a 90º sensor angle at the research location, an overall accuracy value of 84.06% was obtained and a kappa value of 0.78656 on a segmentation scale of 50 with the support vector machine algorithm. Keywords: Mapping, Benthic Habitats, OBIA, Gili Labak Island 
Identifikasi Mikroplastik Pada Kerang Simping (Amusium pleuronectes) (Linnaeus, 1758) Yunita Hatmayanti Hafid; Wayan Kantun Dananjaya; Wilma Joana Moka
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.21666

Abstract

ABSTRAKOrganisme filter feeder seperti kerang merupakan salah satu organisme yang memiliki resiko cukup besar untuk mengakumulasi mikroplastik, salah satunya yaitu kerang simping (Amusium pleuronectes). Penelitian ini bertujuan untuk mengetahui bentuk mikroplastik, frekuensi kehadiran mikroplastik, konsentrasi mikroplastik dan korelasi antara konsentrasi mikroplastik dengan indeks kondisi kerang yang terdapat pada insang kerang simping (Amusium pleuronectes) di Perairan Selat Makassar, Laut Flores dan Teluk Bone. Penelitian ini dilaksanakan pada bulan Agustus- Oktober 2022. Pengambilan sampel kerang dilakukan dengan metode purposive random sampling dengan 15 sampel untuk setiap perairan yang kemudian dikelompokkan menjadi 3 kelompok ukuran panjang cangkang kerang yaitu 50-70 mm (kelas A), 71-80 mm (kelas B), dan 81-90 mm (kelas C). Pengamatan mikroplastik dilakukan dengan menggunakan mikroskop stereo. Hasil penelitian menunjukkan bahwa mikroplastik yang ditemukan berbentuk serat, pecahan, dan butiran dengan ukuran berkisar 0,2416-2,8153 mm. Total frekuensi kehadiran mikroplastik pada kerang simping pada ketiga lokasi penelitian menunjukkan sebanyak 39 sampel (86,67 %) terpapar mikroplastik.Kata Kunci: Indeks kondisi; karakteristik dan konsentrasi mikroplastik; kerang simping.ABSTRACTFilter feeder organisms such as clams are one of the organisms that have a considerable risk for accumulating microplastics, one of which is the scallop clam (Amusium pleuronectes). This study aims to determine the form of microplastics, the frequency of presence of microplastics, the concentration of microplastics and the correlation between microplastic concentrations and the shell condition index found in the gills of scalloped clams (Amusium pleuronectes) in the waters of the Makassar Strait, Flores Sea and Bone Bay. This research was conducted in August-October 2022. The shell samples were taken using a purposive random sampling method with 15 samples for each waters which were then grouped into 3 groups for the size of the shell length, namely 50-70 mm (class A), 71-80 mm (class B), and 81-90 mm (class C). Microplastic observation was carried out using a stereo microscope. The results showed that the microplastics found were in the form of fibers, fragments and granules with sizes ranging from 0.2416 to 2.8153 mm. The total frequency of the presence of microplastics in scallop shells at the three study locations showed that 39 samples (86.67%) were exposed to microplastics. Keywords: condition index; characteristics and concentration of microplastics; scallop shells.
Struktur Komunitas dan Preferensi Substrat lamun di Pantai Negeri Siri-Sori Islam, Pulau Saparua, Maluku Nursing Kaplale; Irma Kesaulya; Frijona F. Lokollo; Abdul Kadir Yamko
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.21896

Abstract

ABSTRAKEkosistem lamun memegang peranan penting di ekosistem perairan yaitu sebagai tempat mencari makan, tempat pembesaran dan tempat berkembang biak. Faktor lingkungan perairan yang mempengaruhi kondisi ekosistem lamun adalah parameter lingkungan seperti suhu, salinitas, DO, pH dan substrat dan kecerahan air. Informasi tentang keragaman dan struktur komunitas dari lamun di Maluku masih sangat terbatas. Dengan demikian maka tujuan dari penelitian adalah untuk mengetahui struktur komunitas lamun yang meliputi komposisi spesies, kepadatan, penutupan serta preferensi substrat dari lamun di pantai negeri Siri Sori Islam di pulau Saparua, Maluku. Penelitian ini dilaksanakan pada bulan Agustus-September 2022 dan pengambilan sampel lamun dengan menggunakan metode garis transek yang ditarik tegak lurus garis pantai dengan jarak antar transek 50m. Kuadrat diletakkan pada tiap transek dengan jarak antar kuadrat yaitu 10m. Lamun pada tiap kuadrat dihitung jumlah tegakan dan penutupannya serta sampel lamun diambil untuk diidentifikasi. Selain itu juga diukur parameter fisik-kimia perairan, seperti suhu, salinitas, DO, dan pH serta pengambilan substrat pada tiap kuadrat dengan menggunakan corer. Komposisi spesies lamun yang ditemukan selama penelitian ini adalah Cymodocea rotundata, Syringodium isoetifolium, Thalassia hemprichii, Enhalus acoroides, Halophila ovalis dan H. minor. Kepadatan lamun berkisar antara 2–80 ind/m2. Kepadatan tertinggi yaitu C. rotundata (80 ind/m2) dan terendah yaitu H. minor (2 ind/m2). Penutupan relative berkisar antara 0,06- 10,92% dan spesies dengan penutupan tertinggi adalah C. rotundata (10,92%). Substrat pada ekosistem lamun didominasi oleh pasir dimana ditemukan keenam spesies lamun dapat tumbuh.Suhu perairan di ekosistem lamun berkisar antara 27,3-31,5℃, salinitas berkisar antara 32- 34‰, konsentrasi oksigen terlarut berkisar antara 6,4-9,2mg/l dan pH berkisar antara 7,85-8,6  Hasil penelitian ini dapat dipakai untuk mempelajari ada tidaknya perubahan struktur komunitas lamun diwaktu mendatang sebagai dampak dari pemanasan global di pulau-pulau kecil di Maluku.Kata Kunci: Keragamn jenis, lamun, Saparua, struktur komunitasABSTRACTSeagrass ecosystem plays an important role in marine ecosystem as a feeding, nursery, and spawning grounds. The information about its diversity and community structure in small island of Maluku are still limited. Therefore, the aim of this study is to examine a species composition, density and coverage and substrate preference of seagrass and physical characteristic of seagrass ecosystem in the coastal area of the village of Siri-Sori in Saparua and this study was carried out between August and September 2022 by using line transect that placed perpendicular to the coastal line. Seagrass sample were counted and taken at each quadrate, where the physical-chemical parameter were measured, simultaneously. Six species of seagrass were recorded, and they are Cymodocea rotundata, Syringodium isoetifolium, Thalassia hemprichii, Enhalus acoroides, Halophila ovalis and Halophila minor. The density of seagrass from 2–80 ind/m2. The highest density was Cymodocea rotundata (80 ind/m2) and the lowest was Halophila minor (2 ind/ m2). The relatif coverge of seagrass range from 0,06- 10,92% and C. rotundata was the highest (10,92%). The substrate of seagrass ecosystem is dominated by sand and all 6 species was found grow in that substrate. The temperature, salinity, dissolved oxygen concentration and pH values around seagrass ecosystem range from 27.3 - 31.5℃, 32- 34‰,  6.4-9.2mg/l and  7.85-8.60, respectively. 
Perbandingan Larutan NaCl dan K2CO3 Sebagai Media Pemisahan Densitas Mikroplastik Pada Sedimen Pantai Kondang Merak dan Pantai Goa Cina Galuh Dyah Pitaloka Hayyu; Dwi Nurjanatin Arifianti; Defri Yona; Feni Iranawati; Syarifah Hikmah Julinda Sari
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.21898

Abstract

ABSTRAKSalah satu tahapan dalam analisis mikroplastik adalah proses pemisahan partikel mikroplastik dari sampel untuk memudahkan proses identifikasi. Pada penelitian ini digunakan larutan NaCl dan K2CO3 yang memiliki densitas berbeda, yaitu masing-masing 1,18 g/cm3 dan 1,43 g/cm3. Larutan NaCl dan K2CO3 memiliki densitas yang lebih tinggi daripada rata-rata mikroplastik yang ditemukan (0.9-1.4 g/cm3), oleh karena itu kedua larutan ini dipilih dalam proses pemisahan densitas. Sampel yang digunakan adalah sampel sedimen Pantai Goa Cina dan Pantai Kondang Merak. Kedua pantai ini dipilih sebagai lokasi pengambilan sampel karena reputasinya sebagai pantai wisata dan berpotensi terhadap pencemaran mikroplastik. Tujuan penelitian ini adalah untuk membandingkan efektivitas penggunaan larutan NaCl dan K2CO3 dalam proses pemisahan densitas mikroplastik serta menganalisis hasil persentase jenis mikroplastik yang ditemukan. Secara keseluruhan terdapat 11 sampel yang terdiri dari lima sampel sedimen dari pantai Goa Cina dan enam sampel sedimen dari Pantai Kondang Merak. Sampel kemudian dikeringkan dan direndam pada masing-masing larutan NaCl dan K2CO3. Supernatant yang terbentuk dalam proses ekstraksi kemudian disaring menggunakan vacuum pump dan kertas whatman untuk diamati partikel mikroplastiknya menggunakan mikroskop. Kedua pantai menunjukkan hasil yang serupa, yaitu didominasi oleh mikroplastik berbentuk fiber. Hasil ekstraksi dengan menggunakan K2CO3 menunjukkan lebih banyak fragmen yang ditemukan dibandingkan dengan hasil ekstraksi dengan menggunakan NaCl. Mikroplastik dalam bentuk pellet hanya ditemukan pada ekstraksi menggunakan larutan K2CO3 pada sampel sedimen Pantai Kondang Merak. K2CO3 lebih mahal daripada NaCl, namun hasil ekstraksi menunjukkan bahwa mikroplastik yang terekstraksi dengan K2CO3 lebih banyak dibandingkan yang terekstraksi dengan NaCl. Kata Kunci: Densitas, Fiber, Fragmen, Pencemaran, WisataABSTRACTOne of the stages in microplastic analysis is the process of separating microplastic particles from the sample to facilitate the identification process. This study used NaCl and K2CO3 solutions used with the density of 1.18 g/cm3 and 1.43 g/cm3 respectively. NaCl and K2CO3 solutions have higher densities than the average microplastics (0.9-1.4 g/cm3) therefore these two solutions were used in the density separation process. The samples used were sediments from Goa Cina Beach and Kondang Merak Beach. Both beaches were chosen as sampling locations because of the reputation of their beauty which make it popular tourist destination. This study will serve as a reference to investigate the abundance of microplastics in the tourist beach of Malang. The purpose of this study is to compare the use of NaCl and K2CO3 solutions in the density separation process, starting from the cost required, materials needed, and the extraction results. Five samples were taken from Goa Cina beach and six samples from Kondang Merak Beach. The sediment samples taken then dried and immersed in the extraction solution, the supernatant formed in the extraction process was then filtered using a vacuum pump and wattman paper to be observed using a microscope. Both beaches showed similar results with fiber-shaped microplastics being the most common. The results of extraction using K2CO3 showed that more fragments were found than the results of extraction using NaCl. Microplastics in the form of pellets were only found in the extraction using K2CO3 solution in Kondang Merak Beach sediment samples. The price of K2CO3 is more expensive than NaCl, but the extraction results showed that microplastics extracted with K2CO3 are more abundant than those extracted with NaCl.Keywords: Density, Fiber, Fragment, Pollution, Tourism
Studi Karakteristik Oseanografi Sebagai Rekomendasi Waktu Penanaman Mangrove (Studi Kasus: Pulau Dompak) Septy Heltria; Ester Restiana Endang Geulis; Farhan Ramdhani; Amir Yarkhasy Yuliardi; Rizky Janatul Magwa; Lauura Hermala; Yoppie Wulanda
Jurnal Kelautan Vol 17, No 1: April (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i1.22182

Abstract

ABSTRAKDegradasi ekosistem mangrove menyebabkan banyak kerugian baik dalam hal pengelolaan jasa lingkungan maupun secara finansial. Penanaman mangrove sendiri merupakan bentuk restorasi guna menyelamatkan penurunan luasan areal mangrove. Dinamika oseanografi merupakan faktor penentu untuk peningkatan keberhasilan dalam kegiatan restorasi ekosistem mangrove. Pulau Dompak tercatat sebagai kawasan Provinsi Kepulauan Riau dengan areal tutupan ekosistem mangrove yang cukup luas namun tergolong tinggi tingkat pemanfaatannya. Penelitan ini bertujuan untuk merekomendasikan waktu terbaik dalam penanaman mangrove dengan melakukan studi karakteristik oseanografi. Metode yang digunakan pada penelitian ini yaitu berupa pemetaan data karakteristik oseanografi dan deskriptif analisis. Hasil yang didapat pada empat parameter oseanografi berupa suhu, salinitas, arus dan pasang surut masing-masing menunjukan perubahan yang tidak terlalu signifikan dan tergolong baik untuk dilakukan penanaman mangrove. Rekomendasi waktu penanaman mangrove terbaik yaitu pada kondisi kecepatan arus terendah yaitu pada Musim Peralihan I.Kata kunci : Musim Peralihan I, Penanaman mangrove, Pulau Dompak, OseanografiABSTRACTDegradation of mangroves causes many losses both in terms of management of environmental services and financially. Mangrove planting is a restoration to save decreasing areas of mangrove. Oceanography is a determining factor for increasing success in mangrove ecosystem restoration activities. Dompak Island is listed as an area of the Riau Archipelago Province with a relatively wide area of mangrove ecosystem cover but a relatively high level of utilization. This research aims to recommend the best time for planting mangroves by conducting a study of oceanographic characteristics. The method used in this study is in the form of mapping data on oceanographic characteristics and descriptive analysis. The results obtained for the four oceanographic parameters, namely temperature, salinity, currents, and tides each show not too significant changes and classified as good for planting mangroves. The recommendation for the best time to plant mangroves is at the lowest current velocity, namely during the Transitional Season I.Keyword : Dompak island, Planting mangrove, Oceanography, Transitional Season I
Tipe dan Pola Pasang Surut pada Perairan di Sekitar Kawasan Reklamasi Kota Tanjungpinang Rumapea, Meyliana Anastasya; Suhana, Mario Putra; Putra, Risandi Dwirama
Jurnal Kelautan Vol 17, No 2: Agustus (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i2.18218

Abstract

ABSTRAKPasang surut sebagai salah satu aspek hidrooseanografi memiliki berbagai peran, baik dalam aspek fisika, kimia, dan biologi perairan maupun untuk pembangunan wilayah pantai. Penelitian pada perairan di sekitar kawasan reklamasi Kota Tanjungpinang bertujuan untuk mengetahui tipe dan pola serta karakteristik pasang surut pada perairan tersebut. Metode yang digunakan adalah metode kuantitatif. Pengambilan data lapangan dilakukan selama 15 hari dengan interval waktu pengamatan setiap 1 jam. Digunakan juga data prediksi dari PUSHIDROSAL kemudian diolah menggunakan admiralty 15 piantan. Uji akurasi dilakukan menggunakan metode RMSE. Berdasarkan penelitian, diperoleh tipe pasang surut campuran condong harian ganda dengan nilai bilangan formzahl berkisar 0.25-1.5. Dari pengamatan di lapangan diperoleh nilai 0.95 sementara dari prediksi PUSHIDROSAL diperoleh nilai 1.33. Pola pasang surut yang diperoleh juga berbeda sesuai fase bulan karena pengamatan dilakukan dalam 2 fase bulan yaitu bulan separuh dan bulan purnama. Selain itu diperoleh juga komponen harmonik pasang surut dimana didominasi oleh komponen M2 dan nilai terendah pada komponen M4 dan MS4. Nilai elevasi muka air laut juga diperoleh yaitu MSL, LAT, HAT, MHHWS, MHHWN, MLLWS, MLLWN, dan TR. Uji akurasi menghasilkan nilai 0.3 sehingga dapat dikatakan bahwa data prediksi dari PUSHIDROSAL dapat digunakan sebagai acuan perencanaan pembangunan pantai di sekitar kawasan reklamasi Kota Tanjungpinang. Kata Kunci: Admiralty, Data Prediksi PUSHIDROSAL, Pasang SurutABSTRACTTides as an aspect of hydro-oceanography have various roles, both in the physical, chemical and biological aspects of waters as well as for the development of coastal areas. Research on the waters around the Tanjungpinang City reclamation area aims to determine the types and patterns and characteristics of the tides in these waters. The method used is a quantitative method. Field data collection was carried out for 15 days with observation intervals every 1 hour. Predictive data from PUSHIDROSAL is also used and then processed using Admiralty 15 Piantan. Accuracy test was carried out using the RMSE method. Based on the research, it was found that the mixed tidal type double daily skewed with formzahl number values ranging from 0.25-1.5. From observations in the field, a value of 0.95 was obtained, while from the PUSHIDROSAL prediction, a value of 1.33 was obtained. The tidal pattern obtained also differs according to the phase of the moon because the observations were made in 2 phases of the moon, namely the half moon and full moon. In addition, tidal harmonic components were also obtained which were dominated by the M2 component and the lowest values were in the M4 and MS4 components. Sea level elevation values were also obtained, namely MSL, LAT, HAT, MHHWS, MHHWN, MLLWS, MLLWN, and TR. The accuracy test yields a value of 0.3 so that it can be said that the predicted data from PUSHIDROSAL can be used as a reference for planning coastal development around the Tanjungpinang City reclamation area.Keywords: Admiralty, PUSHIDROSAL Prediction Data, Tidal

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