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INDONESIA
BULETIN OSEANOGRAFI MARINA
Published by Universitas Diponegoro
ISSN : 20893507     EISSN : 25500015     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Buletin Oseanografi Marina (BULOMA) adalah jurnal yang menginformasikan hasil penelitian dan telaah pustaka tentang aspek Oseanografi, Ilmu Kelautan, Biologi Laut, Geologi Laut, Dinamika Laut dan Samudera, Estuari, Kajian Enerji Alternatif, Mitigasi Bencana, Sumberdaya Alam Pesisir, Laut dan Samudera.
Arjuna Subject : -
Articles 15 Documents
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Search results for , issue "Vol 13, No 1 (2024): Buletin Oseanografi Marina" : 15 Documents clear
Keanekaragaman Bivalvia Di Perairan Kabupaten Aceh Utara Erniati, Erniati; Andika, Yudho; Imanullah, Imanullah; Imamshadiqin, Imamshadiqin; Salmarika, Salmarika; Yulistia, Elva Dwi; Lazuardi, Rafly; Maulana, Sanja
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.53099

Abstract

Kabupaten Aceh Utara memiliki potensi sumberdaya hayati laut yang melimpah salah satunya adalah bivalvia. Sebagai langkah awal dalam pengelolaan dan pemanfaatan potensi bivalvia di wilayah Kabupaten Aceh Utara maka perlu dilakukan penelitian terkait dengan keanekaragaman dan kepadatan bivalvia. Tujuan penelitian untuk melihat keanekaragaman dan pola sebaran bivalvia di Perairan Kabupaten Aceh Utara. Penelitian dilaksanakan pada bulan Juli - Agustus 2022 di perairan Kabupaten Aceh Utara. Metode yang digunakan adalah purposive sampling dengan plot 1 x 1 m dengan analisis PCA dan cluster. Hasil penelitian melaporkan ditemukan 7 jenis bivalvia di Kabupaten Aceh Utara yaitu Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, dan Anadara granosa. Keanekaragaman bivalvia di Kabupaten Aceh Utara tergolong rendah berkisar 0 – 0,67. Ada jenis yang mendominasi dengan kepadatan tertinggi yaitu jenis A. granosa yaitu sebesar 23 Ind/m2. Kepadatan tertinggi bivalvia ditemukan pada Kecamatan Syamtalira Bayu yaitu sebesar 19 Ind/m2. Karakteristik kualitas perairan masih dalam rentang baku mutu untuk kelangsungan kehidupan biota laut. A. granosa telah dimanfaatkan oleh masyarakat Aceh Utara untuk dijual atau dikonsumsi sendiri. Untuk mengatasi masalah eksploitasi secara berlebihan maka perlunya pengelolan sumberdaya kerang ini untuk pemanfaatan secara berkelanjutan.  North Aceh District has abundant marine biological resource potential, one of which is bivalves. As a first step in the management and utilization of the potential of bivalves in the North Aceh district, it is necessary to carry out research related to the diversity and density of bivalves. The aim of the study was to look at the diversity and distribution patterns of bivalves in the waters of North Aceh District. The research was carried out in July - August 2022 in the waters of North Aceh Regency. The method used was purposive sampling with a 1 x 1 m plot with PCA and cluster analysis. The results of the study reported that there were 7 types of bivalves in North Aceh District, namely Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, and Anadara granosa. Bivalve diversity in North Aceh District is low, ranging from 0 to 0.67. There is a type that dominates with the highest density, namely A. granosa, which is 23 Ind/m2. The highest density of bivalves was found in Syamtalira Bayu District, which was 19 Ind/m2. Characteristics of water quality are still within the range of quality standards for the survival of marine biota. A. granosa has been used by the people of North Aceh for sale or self-consumption. To overcome the problem of overexploitation, it is necessary to manage these shellfish resources for sustainable use.
Mikroplastik pada Karang Keras di Perairan Pantai Jepara Irwanto, Eko; Redjeki, Sri; Endrawati, Hadi; Sabdono, Agus
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.42363

Abstract

Ekosistem terumbu karang memegang peranan penting dalam biodiversitas laut serta ikut berperan mengurangi dampak pemanasan global. Namun, ancaman yang dihadapi oleh karang dan ekosistem terumbu karang saat ini adalah keberadaan mikroplastik yang dibuang ke laut. Penelitian ini bertujuan untuk mengetahui keberadaan mikroplastik pada karang keras (jumlah, warna, bentuk, ukuran serta senyawa polimer penyusun mikroplastik) yang terdapat di perairan Pulau Panjang dan Pantai Teluk Awur, Jepara. Sampel karang keras diambil sebanyak 100 gram yang didasarkan pada lifeform pada setiap lokasi (Coral Massive, Coral Submassibe, Coral Banching, dan Coral Folious). Ekstraksi mikroplastik menggunakan larutan H2O2 30%, ditambahkan saline water dan direndam selama 24 jam, disaring menggunakan kertas whatman dan selanjutnya diamati dengan mikroskop. Pengamatan yang dilakukan meliputi kelimpahan, bentuk, warna, dan ukuran dari mikroplastik serta dianalisis menggunakan FTIR (Fourier Transform Infrared). Hasil penelitian, didapatkan bahwa karang keras di perairan Pulau Panjang dan perairan Teluk Awur terdapat mikroplastik sebanyak 34,4 partikel/kg dan 56,7 partikel/kg. Bentuk yang teridentifikasi ialah fiber, pelet, fragmen, dan film dengan bentuk fiber paling mendominasi (64%). Warna mikroplastik yang ditemukan yaitu hitam, biru, merah, transparant, dan ungu dengan warna dominansi hitam mencapai 65,93% dari seluruh mikroplastik di kedua lokasi penelitian. Ukuran mikroplastik yang teridentifikasi antara 0,309 – 4,791 mm. Hasil FTIR menunjukkan bahwa jenis mikroplastik yang ditemukan ialah LDPE (Low Density Polyethylene) atau LLDPE (Low LDPE) dan PS (Polystyrene).  The coral reef ecosystems play an important role in marine biodiversity and reduce the impact of global warming. However, the threat that the coral reef ecosystem is currently threatened by the presence of microplastics that are dumped into the sea. Therefore, this study aims to determine the abundance of microplastics in hard corals (number, color, shape, size, and polymer compounds that makeup microplastics) in Panjang Island and Teluk Awur Beach, Jepara. The sampling of hard corals was 100 grams per sample based on the lifeform at each location (Coral Massive, Coral Submassibe, Coral Branching, and Coral Folious).  The microplastics were extracted using 30% H2O2 solution, saline water was added and soaked for 24 hours, filtered using Whatman paper and then observed with a microscope. This study examined the abundance, shape, colour, and size of microplastics and analysed them using FTIR (Fourier Transform Infrared). The results showed that hard corals in Panjang Island waters and Awur Bay waters contained microplastics as much as 34.4 particles/kg and 56.7 particles/kg. The identified forms are fibres, pellets, fragments, and films with fibres dominating (64%). The colours of microplastics identified were black, blue, red, transparent, and purple with black dominating 65.93% of all microplastics in both study sites. The size of microplastics identified was between 0.309 - 4.791 mm. FTIR results show that the types of microplastics found are LDPE (Low Density Polyethylene) or LLDPE (Low LDPE) and PS (Polystyrene).
Phylogenetic Relationships of Isognomon (Lightfoot, 1786) Oysters from North Sulawesi, Indonesia Wullur, Stenly; Rumampuk, Natalie Detty; Tilaar, Sandra Olivia; Tindi, Monalisa; Smolak, Radoslav
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.54740

Abstract

The Isognomon (Lightfoot, 1786) is a genus of oysters found in various coastal ecosystems throughout the world. Along with other bivalves, it performs significant ecological functions in marine ecosystems by providing food and habitat for fish and invertebrate habitats, filtering water, and protecting shorelines. Taxonomic classification of the Isognomon oyster can be challenging due to the varied or cryptic phenotypic characters, particularly shell characters.  In this study, two specimens with different shell characters of Isognomon oyster were collected from mangrove waters in Likupang, North Sulawesi, Indonesia, and subjected to molecular analysis to determine their identity.  The mitochondrial cytochrome C oxidase subunit I (COI) gene was utilized as a primer for this purpose, and the genetic distance and phylogenetic position of the two specimens were determined by comparing them with the GenBank database. The Basic Local Alignment Search Tool (BLAST) revealed that the two specimens were of belonged to Isognomon ephippium, with a similarity of 99.84%. The genetic distance between the two specimens was calculated using the Tamura Nei model and found to be 0.00, while the genetic distance between I. ephippium and other species in the Isognomon genus ranged from 0.00 to 0.14. The results of the Neighbor Joining (NJ) tree analyses showed that the two specimens clustered together with I. ephippium, which was divided into two distinct clades with a strong bootstrap value of 100 at the node
Kandungan Mikroplastik pada Rajungan (Portunus pelagicus), Air Laut, dan Sedimen Di Perairan Desa Gugunung Wetan Kabupaten Rembang, Jawa Tengah Rohmaniyah, Lailatur; Widowati, Ita; Nuraini, Ria Azizah Tri
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.46984

Abstract

Rembang merupakan salah satu wilayah yang memiliki daerah pantai, karena letaknya yang berada di Utara Pulau Jawa. Perairan laut Kabupaten Rembang merupakan salah satu penghasil perikanan yang besar di Indonesia, salah satu jenisnya yaitu rajungan (Portunus pelagicus). Rajungan sangat rentan terhadap kontaminasi mikroplastik dikarenakan hidup di daerah pasang surut (intertidal) atau didasar perairan yang langsung bersentuhan dengan substrat. Tujuan penelitian ini mengkaji dan menganalisis kandungan mikroplastik pada daging rajungan (Portunus pelagicus), air laut, dan sedimen di perairan laut Desa Gegunung Wetan, Kabupaten Rembang, Jawa Tengah. Sampel rajungan, air laut, dan sedimen kemudian dilakukan analisis kandungan mikroplastik menggunakan 2 metode, yaitu metode analisis fisikal yang di lakukan Laboratorium Tropical Marine Biotechnologi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Semarang dan metode analisis FTIR (Fourier Transform Infrared) yang dilakukan di Laboratorium Terpadu Universitas Gajah Mada, Yogyakarta. Hasil Penelitian menunjukkan ditemukan adanya partikel mikroplastik pada sampel rajungan adalah 68 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polystyrene, Polycarbonate, Latex, Nitrile, dan Poly (Methyl Methacrylate) (PMMA atau Acrylic). Kemudian total kandungan mikroplastik pada sampel air laut adalah 28 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polystyrene dan Polycarbonate. Selanjutnya total kandungan mikroplastik pada sampel sedimen adalah 33 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polypropylene, Polycarbonate, Polystyrene, Polyethylene Terephthalate (PETE), dan Nitrile.  Rembang is one of the areas that has a coastal area, because it is located in the north of the island of Java. The marine waters of Rembang Regency are one of the largest fishery producers in Indonesia, one of which is the blue swimming crab (Portunus pelagicus). Crayfish are very susceptible to microplastic contamination because they live in intertidal areas or on the bottom of waters that are in direct contact with the substrate. The purpose of this study was to examine and analyze the content of microplastics in blue swimming crab meat (Portunus pelagicus), seawater, and sediments in the sea waters of Gegunung Wetan Village, Rembang Regency, Central Java. The blue swimming crab, seawater, and sediment samples were then analyzed for microplastic content using 2 methods, namely the physical analysis method carried out by the Tropical Marine Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, Diponegoro University, Semarang and the FTIR (Fourier Transform Infrared) analysis method carried out at the Integrated Laboratory of Gadjah Mada University, Yogyakarta. The results showed that microplastic particles were found in the swimming crab, seawater, and sediment samples. The total microplastic content in the swimming crab sample was 68 microplastic particles, with the FTIR results showing the microplastics of the types Polystyrene, Polycarbonate, Latex, Nitrile, and Poly (Methyl Methacrylate) (PMMA or Acrylic). Then, the total microplastic content in the seawater sample was 28 microplastic particles, with the FTIR results showing polystyrene and polycarbonate microplastics. Furthermore, the total microplastic content in the sediment sample was 33 microplastic particles, with FTIR results showing microplastics of the types Polypropylene, Polycarbonate, Polystyrene, Polyethylene Terephthalate (PETE), and Nitrile.
Chlorophyll Content of Chlorella vulgaris (Beijerinck, 1890) on Different Light Intensity Khairunnisa, Khairunnisa; Hartati, Retno; Widowati, Ita
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.59218

Abstract

Chlorella vulgaris is a green microalga (Chlorophyta) known to produce chlorophyll pigment as its primary pigment. Chlorophyll is known for its health benefits because it helps heal wounds and prevent hemophilia and diabetes and asthma. Chlorophyll is one of the pigments targeted as a functional food source. One of the environmental parameters that can affect chlorophyll content is the presence of light. This study aims to determine the effect of differences in light intensity on the chlorophyll content of C. vulgaris. The method used in this research is experimental, conducted in the laboratory using a completely randomized design (RAL). ANOVA is the statistical analysis used to analyze the effect of light intensity on chlorophyll content in C. vulgaris. C. vulgaris was cultivated with three different light intensity treatments, namely 1500, 3000, and 4500 lux, with three repetitions each. The growth of C. vulgaris was observed for 8 x 24 hours and then harvested by centrifugation on the eighth day to obtain the wet biomass. Cultivation wet biomass was extracted using acetone PA solvent. The acetone extract of C. vulgaris was analyzed for its chlorophyll pigment content using a spectrophotometer at 645 and 663 nm absorbance. The highest content of chlorophyll-a, b, and chlorophyll produced at a light intensity of 1500 lux was 26.2, 48.5, and 74.7 µg/ml, respectively. According to the results of statistical analysis, it can be concluded that different light-intensity treatments did not show a significant effect (p>0.05) on the content of chlorophyll-a, b, and total chlorophyll in C. vulgaris.

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