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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 2 (2024): Buletin Oseanografi Marina" : 15 Documents clear
Stok Karbon Organik Sedimen Mangrove di Laguna Segara Anakan Putri, Khoirunnisa Azzahra; Ulumuddin, Yaya Ihya; Maslukah, Lilik; Wulandari, Sri Yulina
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.62719

Abstract

Konsentrasi CO2 yang meningkat menyebabkan perubahan iklim dunia. Mangrove memiliki kontribusi besar sebagai penyerap karbon dari atmosfer di lingkungan pesisir dan menyimpannya dalam sedimen maupun biomassa. Penyimpanan karbon dalam sedimen dipengaruhi oleh sumber (termasuk jenis spesiesnya) dan perubahan faktor lingkungan sehingga menyebabkan adanya fluktuasi. Dengan ditemukannya 26 spesies mangrove pohon dan 5 spesies understorey (Aegiceras corniculatum, Avicennia alba dan Nypa fruticans) di Laguna Segara Anakan, maka  perlu dilakukan penelitian terkait pola variasi stok karbon secara spasial dan temporal (vertikal). Penentuan lokasi stasiun berdasarkan peta stratifikasi tutupan mangrove, yaitu kelas mangrove pohon, mangrove nypa, vegetasi mangrove mix dan mangrove understorey. Parameter yang diukur yaitu karbon organik sedimen, ukuran butir sedimen, dan pasang surut. Karbon organik dianalisis menggunakan metode Lost on Ignition (LOI), ukuran butir sedimen dengan particle size analyzer, dan pasang surut diperoleh dari Badan Informasi Geospasial. Hasil penelitian menunjukkan stok rerata karbon organik pada kelas vegetasi mix yaitu 366,783 ton/ha, kelas mangrove understorey sebesar 343,747 ton/ha, kelas mangrove nipah sebesar 298,002 ton/ha dan kelas mangrove pohon sebesar 264,108 ton/ha. Variasi nilai tersebut dipengaruhi oleh ukuran butir dan jenis mangrove. Hasil penelitian ini akan bermanfaat dalam pertimbangan jenis mangrove yang ditanam sebagai bahan kajian dalam mitigasi perubahan iklim global.   The increasing concentration of CO2 is causing global climate change. Mangroves have a major contribution as carbon sequestration from the atmosphere in coastal environments and stored it in sediments and biomass. The storage of carbon in sediments is influenced by environmental factors and their sources (including the type of species), causing carbon fluctuations. With the discovery of 26 tree mangrove species and 5 understorey species (Aegiceras corniculatum, Avicennia alba, and Nypa fruticans) in Segara Anakan Lagoon, it is necessary to conduct research related to the pattern of spatial-vertical variation of carbon stocks. The selection of stations was based on a stratification map of mangrove cover, namely tree mangrove, nypa mangrove, mixed mangrove vegetation, and understorey mangrove. Parameters measured included organic carbon and sediment grain size using the Lost on Ignition (LOI) method and a particle size analyzer. Tidal data was obtained from the Geospatial Information Agency. The results showed the average stock of organic carbon vertically in the mixed vegetation class was 366.783 tonnes/ha, the understorey mangrove class was 343.747 tonnes/ha, nipah mangrove class was 298.002 tonnes/ha and the tree mangrove class was 264.108 tonnes/ha. The variations in values are influenced by grain size and mangrove type. The variation in value is influenced by grain size and mangrove type. The results of this study will be useful in considering the type of mangrove planted as a study material in mitigation for mitigating global climate change.
Variabilitas Thermal Front dan Keterkaitan dengan Klorofil-a di Wilayah Pengelolaan Perikanan Negara Republik Indonesia 711 Zandika, Rendy; Ismunarti, Dwi Haryo; Kunarso, Kunarso; Hatmaja, Rahaden Bagas; Ayubi, M. Albab Al
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.60304

Abstract

memiliki potensi sumber daya kelautan yang besar yang berada pada kawasan Selat Karimata, Laut Natuna, dan Laut Natuna Utara. Penelitian mengenai variabilitas thermal front dan keterkaitan dengan klorofil-a di WPPNRI 711 menjadi informasi yang sangat penting untuk memberikan wawasan yang lebih dalam tentang bagaimana perubahan suhu dan produktivitas biologis saling mempengaruhi. Tujuan penelitian ini adalah untuk mengetahui variabilitas  thermal front dan kaitannya dengan klorofil-a di WPPNRI 711. Penelitian ini menggunakan data SPL, klorofil-a, angin, curah hujan dari website marine.copernicus.eu. Data diolah mengggunakan MATLAB sehingga menghasilkan data, peta, dan grafik dari SPL, thermal front, klorofil-a, curah hujan dan angin dan dianalisis dengan mengkaitkan dengan penelitian sebelumnya menggunakan metode kuantiatif sehingga mendapatkan hasil yang obyektif. Hasil penelitian menunjukkan area thermal front di WPPNRI 711 mencapai nilai tertinggi pada musim barat dengan luas sebesar 386.263 km2 dan area thermal front mencapai nilai terendah pada musim timur dengan luas sebesar 264.058 km2. Keterkaitan klorofil-a dengan thermal front menunjukkan konsentrasi klorofil-a pada daerah thermal front di Pesisir Pulau Sumatera dan Laut Natuna lebih tinggi dengan rata-rata berturut-turut sebesar 3,49 mg/m3 dan 0,16 mg/m3 dibandingkan dengan rata-rata klorofil-a di keseluruhan area Pesisir Pulau Sumatera dan Laut Natuna dengan rata-rata berturut-turut sebesar 2,68 mg/m3 dan 0,14 mg/m3.  Wilayah Pengelolaan Perikanan Negara Republik Indonesia 711 (WPPNRI 711) is a region with significant potential for marine resources located in the Karimata Strait, Natuna Sea, and North Natuna Sea. Research on the variability of thermal fronts and their connection with chlorophyll-a in WPPNRI 711 can provide additional information and deeper insights into how temperature changes and biological productivity mutually influence each other. The aim of this research is to understand the variability of thermal fronts and their correlation with chlorophyll-a in WPPNRI 711. The study utilizes secondary data on Sea Surface Temperature (SPL), chlorophyll-a, wind, and rainfall. The data is processed using MATLAB to generate SPL, thermal front, chlorophyll-a, rainfall, and wind data, as well as maps and graphs. The analysis is conducted by associating the results with previous research using quantitative methods to obtain objective findings.The research findings indicate that the thermal front area in WPPNRI 711 reaches its highest value during the west monsoon season, covering an area of 386,263 km², while the thermal front area reaches its lowest value during the east monsoon season, covering an area of 264,058 km². The correlation between chlorophyll-a and thermal fronts shows that chlorophyll-a concentration in the thermal front areas in the Coastal areas of Sumatra Island and Natuna Sea is higher, with average values of 3.49 mg/m3 and 0.16 mg/m3 respectively, compared to the overall average chlorophyll-a in the Coastal areas of Sumatra Island and Natuna Sea, with average values of 2.68 mg/m3 and 0.14 mg/m3 respectively.
Analisa Mikroalga di Perairan Pelabuhan Provinsi Aceh untuk Deteksi Awal Adanya Invasif Spesies Syahrial, Syahrial; Hatta, Muhammad; Ruzanna, Arina; Jamil, Fajrul; Munira, Nanda; Laksono, Arief Budi; Al Azmy, Muhammad Ridho Al; Fauzi, Sabri; Sartika, Ayu; Handayani, Meutia; Nasution, Riski Dahrian
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.60855

Abstract

Informasi ilmiah berkaitan dengan spesies invasif di Indonesia masih sangat minim terutama mengenai mikroalga. Kajian ini dilakukan pada bulan September – November 2023 di tiga pelabuhan Provinsi Aceh dengan tujuan untuk menganalisa faktor kualitas air, mengidentifikasi jenis mikroalga dan menduga ada tidaknya mikroalga invasif. Data mikroalga dikumpulkan dengan menyaring sampel air permukaan. Parameter suhu, pH, salinitas, kecepatan arus, kecerahan dan oksigen terlarut diukur secara in situ, sedangkan fosfat, nitrat dan ammonia diukur secara ex situ; serta karakteristik kualitas perairannya dianalisis dengan PCA. Sementara untuk menduga ada atau tidak adanya mikroalga invasif dilakukan dengan membandingkan hasil penelitian mikroalga para ahli lain di sekitar lokasi penelitian. Nilai fosfat, nitrat dan ammonia sudah melebihi baku mutu (1.07 ± 1.00 mg/L, 1.63 ± 0.95 mg/L, 0.47 ± 0.74 mg/L) yang mengindikasikan adanya peningkatan produksi mikroalga, kemudian komposisi mikroalganya ditemukan sebanyak 407 ind/ml, 21 spesies dan 5 kelas. Selanjutnya karakteristik kualitas perairannya menunjukkan adanya tiga pengelompokkan hasil dari analisis PCA dengan hasil identifikasi tidak menemukan spesies mikroalga invasif.  Scientific information relating to invasive species in Indonesia is still very minimal, especially regarding microalgae. This study was carried out in September – November 2023 at three ports in Aceh Province with the aim of analyzing water quality factors, identifying types of microalgae, and suspecting the presence or absence of invasive microalgae. Microalgae data was collected by filtering surface water samples. The parameters temperature, pH, salinity, current speed, transparency, and dissolved oxygen were measured in situ, while phosphate, nitrate, and ammonia were measured ex situ, and the water quality characteristics were analyzed using PCA. Meanwhile, to suspect the presence or absence of invasive microalgae, this is done by comparing the results of microalgae research from other experts around the research location. The values of phosphate, nitrate, and ammonia have exceeded the quality standards (1.07 ± 1.00 mg/L, 1.63 ± 0.95 mg/L, and 0.47 ± 0.74 mg/L), which indicates an increase in microalgae production. The microalgae composition was found to be 407 ind/ml, 21 species, and 5 classes. Furthermore, the water quality characteristics show that there are three groupings resulting from PCA analysis, with the identification results not finding invasive microalgae species.
Karakteristik Dan Kesesuaian Lahan Tambak Udang Vaname (Litopenaeus vannamei) Di Kabupaten Kolaka Pariakan, Arman; Rahim, Rahim; Indrayani, Indrayani
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.50925

Abstract

Udang vaname adalah spesies budidaya penting di Indonesia, terutama di Kabupaten Kolaka. Namun, hasil produksi dari kegiatan budidaya menurun setiap tahunnya. Ditemukan pertumbuhan udang tidak optimal dan munculnya penyakit hingga kegagalan panen yang pada akhirnya para pembudidaya merugi dan ditemukan telah banyak lahan budidaya yang terbengkalai. Hal ini diakibatkan karena tidak adanya evaluasi kesesuaian lahan sejak awal. Tujuan penelitian ini adalah mengevaluasi kesesuaian lahan pada tambak udang vaname di pesisir Kabupaten Kolaka khususnya pada Kecamatan Wundulako dan Pomalaa berdasarkan karakteristik air dan tanah.  Pengukuran parameter air dan tanah, seperti amonia, nitrit, salinitas, suhu, oksigen terlarut, pH air, pH tanah, dan potensial redoks tanah, dikumpulkan dari 50 lokasi tambak udang. Pengujian dilakukan baik di laboratorium maupun di lapangan (in situ). Data yang terkumpul dianalisis menggunakan metode analisis spasial Inverse Distance Weighted (IDW) dengan software ArcGIS 10.2., kemudian dipertajam dengan teknik tumpang susun yang digabungkan dengan kriteria kesesuaian lahan budidaya tambak udang vaname, yakni sangat sesuai, cukup sesuai, sesuai marjinal. kriteria kesesuaian ini telah diberi bobot nilai kepentingan berdasarkan pertimbangan studi kepustakaan dan pembenaran ahli.. Hasil analisis pada lokasi budidaya tambak udang di Kolaka ditemukan hanya dua kategori kesesuaian yaitu cukup sesuai dan sesuai marjinal dengan luas 1,208 Ha dan 13,7 Ha. Hasil dari penelitian ini memberikan panduan bagi pembudidaya dalam  memilih lokasi dan merencanakan tindakan dalam kegiatan budidaya udang vaname yang sesuai, sehingga diharapkan dapat meningkatkan produktivitas dan keberlanjutan usaha budidaya udang di masa depan.  Vaname shrimp is one of the shrimp species cultivated in Indonesia, especially in Kolaka Regency. However, production from aquaculture activities has decreased every year. It was found that shrimp growth was not optimal and the emergence of disease and crop failure resulted in farmers losing money and many cultivation areas were found abandoned. This is due to the absence of land suitability evaluation from the beginning. This study aims to evaluate the suitability of vaname shrimp ponds on the coast of Kolaka Regency, especially in Wundulako and Pomalaa sub-districts based on water and soil characteristics. Measurements of water and soil parameters, such as ammonia, nitrite, salinity, temperature, dissolved oxygen, water pH, soil pH, and soil redox potential, were collected from 50 shrimp pond sites. Tests were conducted both in the laboratory and in the field (in situ). The collected data were analyzed using the Inverse Distance Weighted (IDW) spatial analysis method with ArcGIS 10.2 software, then refined with overlapping techniques combined with land suitability criteria for white shrimp pond culture, namely highly suitable, moderately suitable, and marginally suitable. The suitability criteria have been given a weighted importance value based on the consideration of literature studies and expert justification. The results of the analysis on the location of shrimp aquaculture ponds in Kolaka found only two categories of suitability, namely moderately suitable and marginally suitable with an area of 1,208 Ha and 13.7 Ha. The results of this study guide farmers in selecting locations and planning actions in suitable vaname shrimp farming activities, so it is expected to increase the productivity and sustainability of shrimp farming in the future
Total Suspended Solid Concentration Dynamics and Distribution Based on Geospatial Models in Mojo River Estuary, Pemalang Aini, Firly Nur; Indarjo, Agus; Zainuri, Muhammad; Endrawati, Hadi; Redjeki, Sri; Pribadi, Rudhi; Setiyono, Heryoso; Suryoputro, Agus Anugroho Dwi
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.64406

Abstract

Total suspended solids (TSS) concentrations and distribution provide information to determine the quality of the carrying capacity of waters as marine resources. The purpose of the research is to analyze the concentration and distribution of TSS in marine waters due to anthropogenic impacts on land. The concentration and distribution changes of TSS were analyzed using a geospatial model approach. The in-situ data were collected in September 2023 at 14 stations in the east monsoon and analyzed in the laboratory using the gravimetric method. The results show that TSS concentration range from 29.2–52.6 mg/L. The distribution of MPT content in the Mojo River Estuary, Pemalang has several groups of stations with convergent forms, where the high source of MPT comes from around the lagoon, namely the aquaculture and mangrove areas, then in general it is also affected by waste from anthropogenic activities of the, surrounding industries seasonal currents, which are related to wind and seasons, as well as currents due to waters from tides.

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