Buloma: Buletin Oseanografi Marina最新文献

{"title":"Pemetaan Zona Potensial Penangkapan Ikan Tongkol di Perairan Teluk Banten","authors":"Achmad Nagi, Gandhi Napitupulu, Ivonne Milichristi Radjawane, Susanna Nurdjaman, Dedi Supriadi, Dewi Nurhayati","doi":"10.14710/buloma.v12i3.50374","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.50374","url":null,"abstract":"Ikan Tongkol (Euthynnus affinis) adalah komoditas di perairan Teluk Banten yang memiliki nilai produksi tinggi. Potensi ini bisa dimanfaatkan secara maksimal melalui pengetahuan tentang Zona Potensial Penangkapan Ikan (ZPPI). Penelitian ini bertujuan untuk menganalisis hubungan antara parameter oseanografi (suhu permukaan laut (SPL) dan klorofil-a) dan hasil tangkapan Ikan Tongkol, serta membuat pemetaan ZPPI Ikan Tongkol pada tahun 2014-2019. Prediksi ZPPI dilakukan melalui pendekatan parameter oseanografi berdasarkan citra satelit dan data hasil tangkapan Ikan Tongkol. Rata-rata tertinggi produksi Ikan Tongkol tahun 2014-2019 di Teluk Banten diperoleh selama musim peralihan I dengan SPL 29,92C – 30,98C dan konsentrasi klorofil-a 0,99 – 1,13 mg/m³. Analisis pengaruh SPL dan klorofil-a pada tangkapan dilakukan dengan regresi berganda. Pengaruh SPL dan klorofil-a terhadap hasil tangkapan dinilai cukup kuat berdasarkan dari koefisien korelasi () 0,743 dan koefisien determinasi () sebesar 0,551. Nilai dapat memberikan penjelasan bahwa SPL dan klorofil-a mempengaruhi hasil tangkapan sebesar 55,1%. Melalui Analisis Wavelet diperoleh persebaran klorofil-a dominan dipengaruhi faktor monsun sedangkan pengaruh IOD (Indian Ocean Dipole) dan ENSO (El Niño–Southern Oscillation) lemah, sehingga pemetaan ZPPI disusun berdasarkan empat musim. ZPPI yang memiliki potensi lokasi terbanyak diperoleh pada musim barat sejumlah 13 titik. Selanjutnya, berkurang pada musim peralihan I sebanyak 10 titik, musim peralihan II sebanyak 6 titik, dan musim timur sebanyak 4 titik. Mackarel Tuna (Euthynnus affinis) is a commodity in Banten Bay waters that has high production value. This potential can be maximally utilized through knowledge of the Potential Fishing Zone (). This study aims to analyze the relationship between oceanographic parameters (sea surface temperature (SST) and chlorophyll-a) and the catch of Mackarel Tuna, and create PFZ mapping of Mackarel Tuna in 2014-2019. The prediction of PFZ is done through the approach of oceanographic parameters based on satellite imagery and catch data. The highest average production of Mackarel Tuna in 2014-2019 in Banten Bay was obtained during transitional season I with a SST of 29.92°C - 30.98°C and a chlorophyll-a concentration of 0.99 - 1.13 mg/m³. Analysis of the effect of SST and chlorophyll-a on catch was done with multiple regression. The influence of SST and chlorophyll-a on catch was considered quite strong based on the correlation coefficient () of 0.743 and the coefficient of determination () of 0.551. The value can provide an explanation that SST and chlorophyll-a affect the catch by 55.1%. Through Wavelet Analysis, it is obtained that the distribution of chlorophyll-a is dominantly influenced by monsoon factors while the influence of IOD (Indian Ocean Dipole) and ENSO (El Niño-Southern Oscillation) is weak, so that mapping is organized based on four seasons. The that has the most potential locations is obtained in ","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nilai Indeks Trophic Selat Sunda Berdasarkan Global Model Biogeokimia PISCES","authors":"Heru Nur Krisna, Lilik Maslukah, Sri Yuliana Wulandari","doi":"10.14710/buloma.v12i3.53306","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.53306","url":null,"abstract":"Eutrofikasi perairan dapat memicu peningkatan proses biologis dan pertumbuhan alga yang meningkatkan potensi alga-blooming maupun HBAs pada suatu perairan. Faktor pemicunya antara lain nutrien, arus, dan intensitas penyinaran matahari pada suatu perairan. Nutrien di perairan dapat diklasifikasikan berdasarkan Trophic Index (TRIX). Penggunaan data Global Model Ocean PISCES Biogeochemistry dapat menjadi solusi efektif, cepat, dan luas dalam memonitoring nutrien perairan. Selat Sunda dipilih sebagai area penelitian karena pada penelitian sebelumnya telah mengkonfirmasi area-area yang kaya akan nutrien. Multi korelasi Pearson digunakan pada penelitian ini untuk menentukan parameter yang paling signifikan dan berpengaruh satu sama lain. Verifikasi data nilai klorofil-a menunjukan nilai yang cukup valid dengan rata-rata RMSE (0,31) dan BIAS (-0,09). Nilai tertinggi TRIX secara klimatologi pada wilayah mulut selat merupakan wilayah eutrofik dengan nilai 6, wilayah badan selat dan dekat selatan Pulau Jawa merupakan mesotrofik dengan nilai 4,5 serta area dekat Samudra Hinda merupakan oligotrofik dengan nilai kisaran antara 0,6-2,5. Nilai TRIX area mulut Selat Sunda secara signifikan dibatasi oleh nutrien phosphat dengan korelasi Pearson (0,69) dibandingkan unsur N (-0,55). Sedangkan, pada wilayah badan selat dan selatan selat berkorelasi kuat terhadap seluruh komponen TRIX dan cenderung mengikuti pola monsun. Penelitian ini dapat sebagai pertimbangan dalam pemanfaatan model biogeokimia PISCES untuk pemetaan nilai TRIX seluruh perairan, termasuk perairan Indonesia. Eutrophication can trigger increased biological processes and increase the potential for algal blooms and HBAs in the water column. Triggering factors include nutrients, currents, and sunlight intensity in a column of water. Nutrients in column water can be classified according to the Trophic Index (TRIX). The use of Global Model Ocean PISCES Biogeochemistry model data can be an effective, fast, and effective solution in monitoring nutrients. The Sunda Strait was chosen as the research area because previous studies have confirmed nutrient-rich areas. Pearson's multi-correlation was used in this study to determine the most significant parameters that influence each other. Verification of chlorophyll-a values showed validity with an average RMSE (0.31) and BIAS (-0.09). The highest climatological TRIX value in the mouth of the strait is eutrophic with a value of 6, the area of the strait and near the south of Java Island is mesotrophic with a value of 4.5 and the nearby Hinda Ocean area is oligotrophic with a value range between 0.6-2.5. The TRIX value of the mouth of the Sunda Strait is significantly limited by the nutrient phosphate with a Pearson correlation (0.69) compared to the element N (-0.55). Meanwhile, in the region of the strait channel and south of the strait, all TRIX components are strongly correlated and tend to follow the monsoon pattern. This research can be considered in the use","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation and Morphological Characterization of Lead Tolerant Bacteria Associated with Perna viridis","authors":"Yoshua Mario Sumbodo, Fiona Aqhila Dewi, Okti Hajeng Kristiadi, Annisa Nur Ayuningtyas, Heksa Raihan, Muhammad Zainuri, Hermin Pancasakti Kusumaningrum","doi":"10.14710/buloma.v12i3.59350","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.59350","url":null,"abstract":"Lead is a heavy metal contamination that is released into sea waters and cannot be decomposed so it accumulation and magnification along the food chain. Efforts to explore bacteria that have tolerance and have the potential to become lead reduction agents are a strategic step in remediating lead contamination. One mechanism for lead bioremediation by bioaccumulation is to utilize metallothionein protein which can potentially be obtained from isolates of green mussel associated bacteria. Bacterial isolates associated with green mussels were obtained by isolating the bacteria and testing the tolerance of the bacterial isolates using Luria Bertani media which was added with Pb(NO3)2 at a concentration of 100 ppm and its multiples to determine their tolerance to lead. The bacterial isolates obtained were characterized based on colony and cell morphology. The results of the lead resistance test carried out showed that 11 bacterial isolates were obtained and 3 bacterial isolates had tolerance to lead with a lead concentration of 400 ppm. Bacterial isolates that are tolerant to lead show changes in cell morphology to reduce the impact of exposure to lead which has a lethal effect, because the resulting decrease in cell surface area can reduce lead absorption.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134904038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Akumulasi Logam Pb dan Cu pada Akar, Daun dan Serasah Mangrove di Perairan Pekalongan","authors":"Nirwani Soenardjo, Refinda Juliant Mentari","doi":"10.14710/buloma.v12i3.48984","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.48984","url":null,"abstract":"Pekalongan merupakan kota dengan kegiatan industri tekstil cukup besar, terutama industri batik. Kegiatan industri ini menghasilkan limbah (salah satunya logam berat) diduga dapat mencemari lingkungan. Tembaga (Cu) dan Timbal (Pb) adalah logam berat yang umum digunakan sebagai pewarna mordant dalam pewarnaan tekstil. Mangrove Park di Kota Pekalongan sangat penting karena vegetasi mangrove mampu mengakumulasi logam berat. Rhizophora mucronata digunakan sebagai fitoremediator karena dapat mengakumulasi logam berat. Tujuan penelitian ini menganalisis potensi R. mucronata sebagai agen fitoremediasi logam berat Pb dan Cu. Metode purposive sampling digunakan untuk pengambilan data dan sampel dianalisis dengan alat AAS (Atomic Absorption Spectophotometry). Hasil analisis Pb dan Cu ditemukan dalam sampel air, sedimen, daun, akar dan serasah mangrove. Konsentrasi Pb lebih tinggi dibandingkan dengan Cu, bagian akar R.mucronata konsentrasi Pb lebih tinggi (3,658 mg/kg). Berdasarkan Nilai Bio Concentratiosn Factor (BCF) < 1 dan Translocation Factors (FC) < 1, maka R.mucronata adalah tumbuhan excluder yang mempunyai mekanisme Rhizofiltrasi. Pekalongan city is widely known as a city with a fairly large-scale textile industry, especially batik industry. These industrial activities have produced wastes (one of them is heavy metal) that can pollute the environment. Copper (Cu) and Lead (Pb) were a heavy metal commonly used as a dye mordant in textile dyeing. The existence of Mangrove Park in Pekalongan city has an important role due to mangrove vegetation ability to accumulate heavy metals. Rhizophora mucronata was fairly used as phytoremediator due to its ability to accumulate heavy metals. This research purpose was conducted to analyze the potential of R. mucronata as phytoremediator agent for heavy metals such as Pb and Cu. Purposive sampling method was used for data collection and samples were analyzed by AAS (Atomic Absorption Spectophotometry) method. The result of Pb and Cu analysis found in water samples, sediments, leaves, roots and mangrove litter. Pb concentration higher than Cu concentration, on R. mucronata roots were found that the Pb concentration as high as 3,658 mg/kg. Based on Bio Concentrations Factor (BCF) <1 and Translocation Factors (FC)<1, mangrove R. mucronata is an excluder plant that has a rhizofiltration mechanism.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135721004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifikasi dan Analisis Nilai Hamburbalik Objek Dasar Di Perairan Punggur Batam","authors":"Bryan Felix Simanjuntak, Sri Pujiyati, Steven Solikin, Muhammad Zainuddin Lubis","doi":"10.14710/buloma.v12i3.52393","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.52393","url":null,"abstract":"Deteksi objek dasar perairan merupakan proses analisa objek yang menggunakan kemampuan teknologi sonar. Side scan sonar (SSS) adalah alat yang menggunakan komponen satu beam (Single beam) yang dapat menampilkan citra dalam bentuk dua dimensi (2D). Tujuan dari penelitian ini adalah menganalisis dan mendeteksi objek dasar di Perairan Punggur Batam. Penggunaan data side scan sonar sangat efisien dalam mengidentifikasi Perairan Punggur Batam. Data side scan sonar dengan format Xtf diproses dengan menggunakan koreksi radiometrik dan geometrik melalui perangkat lunak SonarWiz 7 untuk mendapatkan klasifikasi citra. Proses ekstraksi data menggunakan perangkat lunak SeiSee 2.2 untuk menampilkan nilai amplitudo dan waktu. Trace diambil sesuai nomor ping target. Trace data dikonversi ke dalam format txt atau xls kemudian data trace diinput ke dalam perangkat lunak Matlab r2017a untuk menampilkan grafik amplitudo (mV). Analisis hamburbalik menggunakan perhitungan logaritma yaitu 20Log10 (Vt/V0) dengan Vt merupakan dominan dan V0 amplitudo maksimum. Berdasarkan hamburbalik SSS di perairan Punggur Batam diperoleh 6 target yang memiliki nilai hamburbalik -3,32 dB, -5,71 dB, -1,13 dB, -6,81 dB, -4,86 dB, dan -3,74 dB. Nilai hamburbalik digunakan untuk menduga jenis target yang ada di perairan Punggur, yaitu karang besar, karang sedang, batu besar, batu sedang, serta batu cukup besar. Besar kecilnya nilai hamburbalik yang didapatkan dipengaruhi oleh amplitudo target. Detection of underwater objects is an object analysis process that uses the capabilities of sonar technology. Side scan sonar is a tool that uses Single beam which can display images in two dimensions (2D). The purpose of this study is to analyze and detect objects on the bottom of the waters. The use of side scan sonar data is very efficient in identifying Punggur Batam Waters. Side scan sonar (SSS) data in Xtf format was processed using radiometric and geometric corre ctions with SonarWiz 7 software to obtain image classifications. The data extraction process used SeiSee 2.2 software to show the amplitude and time values. Traces were taken based on the target ping number. The trace data were converted into txt or xls format then the trace data was inputted into the Matlab r2017a software to show an amplitude (mV) graph. The backscatter analysis used a logarithmic calculation, 20Log10 (Vt/V0) with Vt being the dominant and V0 being the maximum amplitude. Based on the SSS backscattering in the waters of Punggur Batam we got 6 targets which had backscatter values about -3.32 dB, -5.71 dB, -1.13 dB, -6.81 dB, -4.86 dB, and -3.74 dB. The backscatter value is used to estimate the types of targets in Punggur waters, namely large corals, medium corals, large rocks, medium rocks, and quite large rocks. The size of the backscatter value was influenced by the target amplitude.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135721006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Percampuran Vertikal Massa Air Lapisan Pertengahan Perairan Lifamatola pada Bulan Maret 2009","authors":"Gentio Harsono, Budi Purwanto, Anindya Wirasatriya, Sri Murtiana, Rifqi N. Agassi","doi":"10.14710/buloma.v12i3.56350","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.56350","url":null,"abstract":"Perairan Lifamatola menarik dikaji selain sebagai lintasan Arlindo juga proses percampuran massa airnya terjadi secara intensif. Tujuan penelitian ini adalah mengkaji percampuran turbulen di Perairan Lifamatola pada Maret 2009. Data salinitas, temperatur dan kedalaman diperoleh dari program Tropical Ocean Climate Study (TOCS) tahun 2009, kerjasama Badan Pengkajian Penerapan Teknologi (BPPT) dan Jamstec (Japan of Marine Science Earth and Technology) Jepang menggunakan RV. Kaiyo. Analisis meliputi analisis skala Thorpe (LT), frekuensi Brunt Vaisala (N), disipasi energi kinetik turbulen (ε) dan estimasi nilai difusivitas eddy vertikal (KZ). Hasil identifikasi karakteristik massa air Samudera Pasifik, North Pacific Intermediate Water (NPIW) pada perairan ini S-max tidak terlihat karena diduga sudah bertranformasi menjadi massa air dengan karakteristik yang baru akibat proses percampuran. Hasil perhitungan terhadap nilai frekuensi Brunt Vaisala, pada lapisan termoklin diperoleh nilai N2 tertinggi yaitu 0,05-0,15 s-1 pada kedalaman 100 m dan kedalaman 200 m, sementara lapisan tercampur berkisar 0,0- 0,01 s-1 dan lapisan dalam 0-0,005 s-1. Lapisan termoklin memiliki nilai Td -5 m sampai 3 m, lapisan dalam berkisar -4 m sampai 5 m dan lapisan dalam berkisar -13m sampai 19 m. Nilai rata-rata disipasi energi kinetik turbulen (ε) dari semua lapisan yaitu sebesar 3.29 x 10-9 Wkg-1. Hasil dari rata-rata menunjukkan bahwa semakin bertambahnya kedalaman nilai disipasi energi kinetik turbulen (ε) semakin menurun. Nilai difusivitas paling tinggi terjadi pada lapisan termoklin dan menurun dengan semakin bertambah nya kedalaman. Nilai Kz pada lapisan permukaan antar sampling berbeda-beda, terjadi akibat Gelombang Internal dan aktivitas pasang surut. Lifamatola waters are interesting to study apart from being the Arlindo trajectory as well as the process of intensive mixing. The aim of this research is to examine turbulent mixing in Lifamatola Waters in March 2009. Salinity, Temperature and Depth data were obtained from the Tropical Ocean Climate Study (TOCS) program in 2009, a collaboration between the Agency for the Assessment of the Application of Technology (BPPT) and Japan of Marine Science Earth and Technology uses RV. Kaiyo. The analysis includes Thorpe scale analysis (LT), Brunt Vaisala frequency (N), turbulent kinetic energy dissipation (ε) and estimation of vertical eddy diffusivity (KZ) values. The results of identifying the characteristics of the Pacific Ocean wate mass, North Pacific Intermediate Water (NPIW) in these waters, S-max is not visible because it is thought to have been transformed into a water mass with new characteristics due to the mixing process. The results of the calculation of the Brunt Vaisala frequency value, in the thermocline layer, the highest N2 value was obtained, namely 0.05-0.15 s-1 at a depth of 100 m and a depth of 200 m, while the mixed layer ranged from 0.0-0.01 s-1 and inner layer 0-0.005 s-1. The thermocline layer has a ","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135721008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artemia with Synbiotics Enrichment Improves Resistance Against Vibrio parahaemolyticus AHPND of Litopenaeus vannamei Larvae","authors":"Ervia Yudiati, Zaenal Arifin, Adi Santoso, Jelita Rahma Hidayati, Rabia Alghazeer, Nuril Azhar","doi":"10.14710/buloma.v12i3.52523","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.52523","url":null,"abstract":"Shrimp, a high-protein food commodity, is one of the world's fastest-growing food-producing sectors. The present research aimed to find out the survival and growth of Litopenaues vannamei Post Larva (PL) and the resistance against VpAHND and stress salinity. 1500 PL were reared to two sets of experiments at the density of 50 PL. L-1. The first set is purposed to determine the PL growth, resistance to Vibrio paramaemolyticus AHPND challenge and stress salinity. The second set is purposed to determine the survival rate. A Completely randomized design (CRD) with five treatments and three replications was conducted. The treatments are Artemia enrichment with different Alginate doses and probiotics (400, 600, 800 ppm Alg+pro), probiotics (Pro), and control without any synbiotics addition. PL was reared in 14 days. The survival rate, and weight gain were calculated. At the end of the experiment, 10 PL was challenged against VpAHPND at 1 x 107 CFU mL-1by immersion methods. Twenty PL was exposed to stress salinity and shocked from 25 ppt to 0 ppt. The best survival rate ((78±2%), and tolerance to osmotic stress was reached at PL fed on a combination of alginate and FNCC-002 Lactobacillus bulgaricus probiotics (p<0.05). PL fed on Artemia enriched probiotics reached the highest resistance to severe VpAHNPD. The weight gain among treatments is similar. It can be concluded that synbiotics of alginate as prebiotics and FNCC-004 probiotics work synergically and this might be interrelated with immune response.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135720838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Populasi Mangrove Rhizophora stylosa Griff. di Desa Kuala Langsa Kota Langsa: Distribusi Geografi, Struktur Demografi, Morfometrik Organ dan Karakteristik Penciri Morfometriknya","authors":"Nur Safira, Erniati Erniati, Syahrial Syahrial, Fitra Wira Hadinata, Rika Anggraini, Nur Ikhsan, Risnita Tri Utami, Hendrik V. Ayhuan, Riri Ezraneti","doi":"10.14710/buloma.v12i3.52267","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.52267","url":null,"abstract":"Kajian terhadap populasi mangrove Rhizophora stylosa di Desa Kuala Langsa Kota Langsa dilakukan pada bulan November 2021 dengan tujuan untuk mengetahui distribusi geografi, struktur demografi, morfometrik organ dan karakteristik penciri morfometriknya. Data dikumpulkan dengan menarik transek kuadran berukuran 10 x 10 m yang tegak lurus garis pantai, dimana penentuan stasiun pengamatannnya berdasarkan purposive sampling. Organ daun, buah dan bunga diambil pada 5 tegakan pohon di masing-masing plot, kemudian diukur morfometriknya. Untuk struktur demografi, pengelompokkan umurnya dianalisis menurut metode Bhattacharya dan untuk penciri morfometriknya dianalisis berdasarkan statistik Principal Component Analysis (PCA). Hasil kajian memperlihatkan bahwa distribusi geografinya tergolong berlimpah (frekuensi relatif di atas 80%) dan pengelompokkan umurnya hanya terdiri dari satu kelompak dengan kisaran nilai tengah diameter batangnya antara 2,30–12,44 cm. Morfometrik diameter buah yang dominan ditemukan adalah 1,05–1,11 cm, panjang buah 26,46–27,77 cm, lebar kelopak bunga 0,38–0,41 cm, panjang kelopak bunga 0,98–1,04 cm, lebar daun 5,50–5,77 cm, panjang daun 11,60–12,11 cm dan diameter batang 5,41–7,00 cm. Selain itu, panjang buah, panjang kelopak bunga dan diameter batang merupakan morfometrik pencirinya dengan keragaman data 82,73%. In November 2021, a study was conducted on the Rhizophora stylosa mangrove population in Kuala Langsa Village, Langsa City, with the objective of determining the population's geographical distribution, demographic structure, morphometric organs, and morphometric characteristics. The data were collected by pulling a 10 x 10 m quadrant transect parallel to the shoreline, with the observation station determined through purposive sampling. Leaf, fruit, and flower organs were collected from five tree stands in each plot and then measured morphometrically. Battachraya method was used for the demograpic structure and Principal Component Analysis (PCA) was used to determine the morphological characteristics. The study's findings revealed a widespread geographic distribution (relative frequency greater than 80%) and a single age grouping with median stem diameters ranging from 2.30-12.44 cm. The dominant fruit diameter morphometrics were 1.05–1.11 cm, fruit length 26.46–27.77 cm, petal width 0.38–0.41 cm, petal length 0.98–1.04 cm, leaf width 5.50–5.77 cm, leaf length 11.60–12.11 cm, and diameter stem 5.41–7.00 cm. Furthermore, fruit length, flower petal length, and stem diameter are all morphometric characteristics with an 82.73% data diversity.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135721005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potensi Karbon Biru Pesisir Kalimantan Barat","authors":"Ayunda Annisa Putri, Aji Ali Akbar, Romiyanto Romiyanto, Dian Rahayu Jati, Ochih Saziati","doi":"10.14710/buloma.v12i3.52009","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.52009","url":null,"abstract":"Potensi karbon biru (blue carbon) di pesisir Kalimantan Barat terdapat pada ekosistem mangrove, padang lamun, dan terumbu karang. Ketiga ekosistem ini tersebar di Kabupaten Sambas, Bengkayang, Mempawah, Kubu Raya, Ketapang dan Kota Singkawang. Penelitian ini bertujuan mengetahui luas dan keanekaragaman jenis ekosistem pesisir terkait dengan potensi karbon biru. Metode non-destruktif digunakan untuk mengkaji kemampuan ekosistem pesisir dalam menyerap karbon. Mangrove didominasi jenis didominasi oleh Rhizophora spp., Avicennia spp. Bruguiera spp., Sonneratia alba, Excoeacaria agallocha, dan Nypa fruticans. Padang lamun didominasi jenis Thalassia hemprichii dan Enhalus acoroides, sementara terumbu karang didominasi jenis Porites spp. dan Montipora spp. Estimasi serapan karbon terbesar berada di Kubu Raya sebesar 0,026 PgC (0,095 PgCO2e) dan yang terkecil berada di Kota Singkawang sebesar 0,000032 PgC (0,00012 PgCO2e). Penelitian ini mengungkap bahwa kemampuan serapan karbon berbanding lurus dengan luas ekosistem pesisir. Ekosistem mangrove merupakan ekosistem yang memiliki kemampuan dalam menyerap karbon, daripada ekosistem lamun dan terumbu karang. Upaya antropegenik memperparah degradasi ekosistem di pesisir Kalimantan Barat. The potency of blue carbon in the West Kalimantan is found in mangroves, seagrass beds, and coral reefs ecosystem. Sambas, Bengkayang, Mempawah, Kubu Raya, Ketapang, and Singkawang regencies coastal had a big potential blue carbon. This study aims to estimate the potential of blue carbon on coastal ecosystems diversity. This research was applying a non-destructive method to quantify the carbon sequestration of the ecosystems. Rhizophora spp., Avicennia spp, dominates mangrove, in Kalimantan Barat. Bruguiera spp., Sonneratia alba, Excoeacaria agallocha, dan Nypa fruticans, for mangroves, Thalassia hemprichii and Enhalus acoroides for seagrass and Porites spp. and Montipora spp, for coral reefs. The most extensive estimated carbon sequestration is in Kubu Raya regency with 0.026 PgC (0.095 PgCO2e), and the smallest one is in the Singkawang regency with 0.000032 PgC/ha (0.00012 PgCO2e/ha). Based on this research, it is observed that the ability of carbon sequestration is directly influenced by the coverage area of the coastal ecosystem, especially the mangrove forest which are dynamic due to anthropogenic activities.","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Impact and Prediction of Shoreline Dynamics in Pekalongan, Indonesia","authors":"Muhammad Farras Ayasy, Muhammad Helmi, Muhammad Zainuri, Kunarso Kunarso, Baskoro Rochaddi","doi":"10.14710/buloma.v12i3.51455","DOIUrl":"https://doi.org/10.14710/buloma.v12i3.51455","url":null,"abstract":"Shoreline in Pekalongan has changed and impacted land use significantly. This research investigates historical changes in shoreline dynamics and their impact on land use from 2003–2021. This research also examines the trend of shoreline prediction for 2031–2041. Multitemporal SPOT5 and SPOT6 satellite images were used as primer data to detect shoreline and land use changes. The DSAS (Digital Shoreline Analysis System) analyzes the shoreline change and generates shoreline prediction. This research shows that the coastal areas of Pekalongan have been impacted by erosion, with 528.08 hectares of area and 56.33 hectares of accretion. The North Pekalongan sub-district is the worst area hit by erosion. The shoreline has retreated 2405.8 meters with a 353.3 m/year erosion rate. Several areas of land use were heavily affected by erosion trends, such as ponds, rice fields, and open land. Shoreline predictions generated by DSAS were heavily reliant on historical rates of shoreline change dynamics. The predicted area of the shoreline is estimated to retreat 49.9–466.2 meters from the existing position in the next 10 and 20 years. This research is expected to provide information to local governments for evaluating the maintenance and development planning of the coastal area","PeriodicalId":470797,"journal":{"name":"Buloma: Buletin Oseanografi Marina","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136240999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}