Journal of Marine Research最新文献

{"title":"Struktur Komunitas Mangrove di Ekosistem Hutan Mangrove Kecamatan Tayu, Kabupaten Pati","authors":"Rachellia Rose Nugraha, S. Sunaryo, S. Redjeki","doi":"10.14710/jmr.v12i3.36227","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.36227","url":null,"abstract":"Ekosistem mangrove dapat dimanfaatkan oleh beberapa biota sebagai tempat untuk mencari makan, sebagai tempat memijah dan area asuhan. Kondisi ekosistem mangrove dapat mengalami penurunan salah satunya karena alih fungsi hutan mangrove. Hal ini akan berdampak buruk terhadap perekonomian nelayan, petambak dan masyarakat lainnya pada daerah tersebut. Penelitian ini perlu dilakukan dengan tujuan untuk menganalisis struktur komunitas mangrove yang ada di ekosistem hutan mangrove Kecamatan Tayu, Kabupaten Pati. Penelitian ini menggunakan metode survei dengan teknik purposive sampling untuk penentuan lokasinya. Terdapat 4 stasiun dan setiap stasiun terdiri dari 3 plot, masing-masing plot berukuran 10m x 10m untuk tingkat pohon dan 5 x 5 m untuk anakan. Pengolahan data struktur komunitas mangrove dilakukan dengan menggunakan perangkat lunak berupa Microsoft Excel. Terdapat dua jenis mangrove yang ditemukan pada penelitian ini yaitu Avicennia marina dan Avicennia alba. Kerapatan mangrove di lokasi penelitian tergolong sangat rapat. Berdasarkan nilai frekuensinya jenis Avicennia marina selalu ditemukan pada setiap plot pengamatan. Hasil indeks dominansi menyatakan bahwa pada Stasiun I hingga Stasiun IV terdapat jenis yang mendominasi dengan kisaran nilai sebesar 0,7 – 0,78. INP paling tinggi ada pada jenis Avicennia marina dengan nilai sebesar 260% dan tergolong tinggi. Hasil nilai indeks keanekaragaman menyatakan bahwa keanekaragaman mangrove pada lokasi penelitian ini tergolong rendah. Sedangkan nilai indeks keseragamannya termasuk dalam kategori sedang dan kurang. Secara umum parameter kualitas perairan (suhu, pH, salinitas, substrat dan kandungan nitrat, fosfat substrat) dinyatakan sesuai dan baik untuk kehidupan mangrove. Mangrove ecosystems can be used by some biota as a feeding, spawning and nursery ground. The condition of the mangrove ecosystem can experience a decline, one of which is due to the conversion of mangrove forests. This will adversely affect the economy of fishermen, farmers and other communities in the area. This study needs to be done with the aim to analyze the structure of mangrove communities in the mangrove forest ecosystem in Tayu District, Pati Regency. This research used a survey method with purposive sampling technique to determine the location. There were 4 stations and each station consisted of 3 plots, each plot measuring 10 x 10m for tree level and 5 x 5m for saplings. Mangrove community structure data processing was done by using software such as Microsoft Excel. There were two types of mangroves found in this study, namely Avicennia marina and Avicennia alba. The density of mangroves at the research site was classified as very tight. Based on the frequency value, the type of Avicennia marina was always found in each observation plot. The results of the dominance index states that at Station I to station IV there were types that dominate with a range of values of 0.7 to 0.78. The highest INP value was in the type of Avi","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42520658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Konsentrasi Benzalkonium Klorida Di Perairan Segara Anakan, Cilacap","authors":"N. Ayu, Dewi Kresnasari","doi":"10.14710/jmr.v12i3.40387","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.40387","url":null,"abstract":"Benzalkonium klorida (BAC) mengalami peningkatan penggunaan setelah pandemi Covid-19, namun penggunaan senyawa ini belum teregulasi secara intensif sehingga eksistensinya di perairan umum berpotensi menjadi ancaman serius bagi ekosistem. Penelitian ini bertujuan mengkaji konsentrasi BAC di Segara Anakan sebagai salah satu ekosistem yang mendapat masukan dari aliran-aliran sungai di mana terdapat banyak aktivitas manusia. Pengambilan sampel air dilakukan menggunakan metode purposive random sampling pada lima lokasi di Segara Anakan dengan kriteria yaitu: lokasi yang dekat dengan aktivitas domestik penduduk, lokasi yang jauh dari aktivitas domestik penduduk (termasuk yang dikelilingi oleh hutan mangrove), lokasi di sekitar kawasan industri, serta lokasi dengan limpasan air tawar atau muara sungai. Kisaran BAC yang ditemukan pada kolom air permukaan Segara Anakan dari Stasiun 1 hingga 5 adalah 0,139 µg/l, 0,235 µg/l, 0,189 µg/l, 0,206 µg/l, dan 0,245 µg/l. Sedangkan konsentrasi pada kolom air di permukaan dasar dari Stasiun 1 hingga 5 adalah 0,126 µg/l, 0,222 µg/l, 0,196 µg/l, 0,175 µg/l, dan 0,241 µg/l. Hasil penelitian menunjukkan bahwa BAC merupakan mikropolutan yang ditemukan di perairan Segara Anakan Cilacap. Konsentrasi BAC yang ditemukan juga dipengaruhi oleh nilai parameter fisikokimiawi perairan.  The use of benzalkonium chloride (BAC) has been increasing after the Covid-19 pandemic, but there are still no intensive regulation about the utilization of of this compound so that its presence in public waters has the potential to become a serious threat to ecosystems. This study aimed to examine the concentration of BAC in Segara Anakan as an ecosystem that receives input from rivers contaminated by domestic waste as a result of human activities. Water samples were taken using a purposive random sampling method at five locations in Segara Anakan with the following criteria: locations close to the domestic activities, locations far from domestic activities (including those surrounded by mangrove forests), locations around industrial areas, and locations with fresh water or river estuary runoff. The BAC concentration in the Segara Anakan surface water column from Stations 1 to 5 were 0.139 µg/l, 0.235 µg/l, 0.189 µg/l, 0.206 µg/l, and 0.245 µg/l, respectively. Meanwhile, the concentrations in the water column at the bottom surface from Stations 1 to 5 were 0.126 µg/l, 0.222 µg/l, 0.196 µg/l, 0.175 µg/l, and 0.241 µg/l, respectively. The results showed that BAC was a micropollutant found in the waters of Segara Anakan Cilacap. The concentrations were also influenced by the physicochemical parameter values of the waters.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43690199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifikasi Tingkat Kesegaran Ikan Tongkol (Euthynnus sp.) Di Pasar Bumiayu, Kabupaten Brebes","authors":"M. F. N. Al Fatich, Aryanti Indah Setyastuti, Dewi Kresnasari, Sarmin Sarmin","doi":"10.14710/jmr.v12i3.40444","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.40444","url":null,"abstract":"Tingkat kesegaran ikan dapat mempengaruhi kualitas dan nutrisi ikan. Pemasaran ikan tongkol segar yang dipasarkan di Pasar Bumiayu, Kabupaten Brebes kurang memperhatikan penanganan, sehingga dapat menurunkan kualitas dan nutrisi ikan tongkol segar. Tingkat kesegaran  ikan dapat diidentifikasi atau dinilai secara organoleptik. Tujuan penelitian ini adalah untuk mengetahui tingkat kesegaran ikan tongkol segar di Pasar Bumiayu. Metode penelitian ini dengan pengambilan sampel ikan tongkol pada pukul 06.00; 09.00; dan 12.00 WIB, selanjutnya diidentifikasi kesegarannya secara organoleptik dan pengujian pH ikan segar. Pengambilan sampel dilakukan selama 3 minggu yaitu tanggal 14 September 2022; 28 September 2022; dan 12 Oktober 2022. Analisa data menggunakan analisa deskriptif. Hasil penelitian menunjukkan bahawa ikan tongkol masih dikategorikan segar pada pengambilan sampel di pukul 06.00 hingga 09.00; sedangkan pada pukul 12.00 ikan sudah mengalami proses kemunduran mutu. Nilai organoleptik rata-rata diantara 8,33 hingga 3,67. Berdasarkan SNI ikan segar SNI 2729:2013, nilai organoleptik ikan segar adalah 7. pH daging ikan tongkol diperoleh sebesar 5,56 hingga 6,11. pH merupakan indikator tingkat kemunduran mutu ikan. Semakin tinggi nilai pH menunjukkan bahwa terjadi aktivitas mikroorganisme pembusuk dalam tubuh ikan.   The level of fish freshness can affect the quality and nutrition of fish. The marketing of fresh little tuna which is marketed in Bumiayu Traditional Market, Brebes Regency less attention to fish handling, it can reduce the quality and nutrition of fresh eastern little tuna. The level of fish freshness can be identified or assessed organoleptic test. The purpose of this study was to determine the level of fish freshness of fresh little tuna in the Bumiayu Market organoleptically. This research method by taking little tuna samples at 06.00am; 09.00am; and 12.00pm WIB, then the freshness was identified organoleptically and tested the pH of fresh fish. Sampling was carried out for 3 weeks, namely September 14, 2022; September 28, 2022; and October 12, 2022. Data analysis used descriptive analysis. The results of the 3-week study showed that tuna was still categorized as fresh when sampling at 06.00 to 09.00; while at 12.00 the fish had experienced a decline in quality. The average organoleptic value is between 8.33 and 3.67. Based on SNI fresh fish SNI 2729:2013, the organoleptic value of fresh fish is 7. The pH of little tuna meat is obtained from 5.56 to 6.11. pH is an indicator of the level of decrease in fish quality. The higher the pH value indicates that there is activity of decomposing microorganisms in fish body.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46890601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Kerapatan Mangrove dan Keanekaragaman Makrozoobenthos di Kawasan Ekowisata Mangrove Lantebung Kota Makassar","authors":"Amal Arfan, Wahidah Sanusi, Muhammad Rakib","doi":"10.14710/jmr.v12i3.38060","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.38060","url":null,"abstract":"Ekosistem mangrove berada dalam posisi yang mengkhawatirkan karena ekosistem tersebut terancam mengalami penurunan kualitas dan kuantitas. Sementara ekosistem mangrove memiliki peran penting dalam menjaga keseimbangan ekologis dan menyediakan berbagai manfaat. Penelitian ini bertujuan untuk menganalisis kerapatan mangrove dan keanekaragaman makrozoobenthos di kawasan ekowisata mangrove Lantebung, Makassar. Penelitian dilakukan dengan mengaplikasikan sistem informasi geografis yakni analisis citra pengindraan jauh menggunakan metode Normalized Difference Vegetation Index (NDVI), selanjutnya dilakukan ground check yaitu survei lapangan untuk mengidentifikasi keanekaragaman dan kelimpahan jenis mangrove dan makrozoobenthos. Secara umum, kerapatan mangrove di lokasi penelitian tergolong lebat, dan sebagian kecil kerapatan sedang. Nilai kerapatan tertinggi sebesar 0,63 ind/m2, sedangkan nilai terendah sebesar 0,42 ind/m2. Jenis mangrove yang terdapat di lokasi penelitian diantaranya Rhizopora mucronata, Rhizopora apiculata, Brugaria gymnorhiza, Avicennia marina, Avicennia alba, dan Sonneratia alba. Rhizophora mucronata menjadi spesies mangrove yang paling dominan, sedangkan Sonneratia alba merupakan yang paling sedikit ditemukan pada lokasi penelitian. Makrozoobenthos yang hidup di ekosistem tersebut cukup beragam dan berlimpah, paling dominan ditemukan Uca sp. (kelas crustacea). Muara sungai merupakan area dengan kerapatan mangrove yang paling tinggi serta area yang paling banyak hidup makrozoobenthos. Ekosistem mangrove di Lantebung masih tergolong sehat dan perlu dijaga agar tetap lestari. Analisis kerapatan mangrove dan keanekaragaman makrozoobenthos penting untuk mendukung pemanfaatan ekosistem mangrove salah satunya pengembangan ekowisata mangrove yang berkelanjutan.  Mangrove ecosystems are in a worrying position because they are threatened by a decline in quality and quantity. While mangrove ecosystems have an important role in maintaining ecological balance and providing various benefits. This study aims to analysis mangrove density and macrozoobenthos diversity in the Lantebung mangrove ecotourism area, Makassar. The research was conducted by applying geographic information systems, namely remote sensing image analysis using the Normalized Difference Vegetation Index (NDVI) method, followed by ground checks, namely field surveys to identify the diversity and abundance of mangrove species and macrozoobenthos. In general, the density of mangroves in the study site is classified as dense, and a small portion of moderate density. The highest density value was 0.63 ind/m2 while the lowest value was 0.42 ind/ m2. Mangrove species found in the study site include Rhizopora mucronata, Rhizopora apiculate, Brugaria gymnorhiza, Avicennia marina, Avicennia alba, and Sonneratia alba.  Rhizopora mucronata became the most dominant mangrove species, while Sonneratia alba was the least occupying the study site. Macrozoobenthos that live in the ecosystem are ","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49006420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Jenis dan Bobot Sampah Makroplastik di Kawasan Padang Lamun Perairan Pulau Kelapa Dua Kepulauan Seribu Jakarta","authors":"Muhamad Syahrul Ramadhani, M. Munasik, Ita Riniatsih","doi":"10.14710/jmr.v12i3.33932","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.33932","url":null,"abstract":"Sampah merupakan sesuatu yang terbuang atau dibuang dari sumber hasil aktifitas makhluk hidup dan tidak mempunyai nilai ekonomi. Sampah makroplastik merupakan sampah yang sulit atau tidak dapat terurai oleh mikroorganisme. Sampah dari daratan terbawa ombak ke laut menyebabkan pencemaran. Penelitian ini bertujuan mengetahui pengaruh sampah makroplastik terhadap kondisi padang lamun di perairan Pulau Kelapa Dua, Kepulauan Seribu, Jakarta. Materi penelitian yang digunakan yaitu sampah makro plastik yang diambil di perairan padang lamun dan air yang diambil di area padang lamun. Metode yang dilakukan yaitu persiapan, penentuan stasiun penelitian, pengambilan data, dan analisis data. Pengamatan sampah makroplastik di area padang lamun dilakukan sebanyak 3 kali pengulangan dalam satu stasiun. Hasil penelitian menunjukan bahwa tipe pasang surut di lokasi pengamatan memiliki tipe pasang surut diurnal type. Data kecepatan arus berkisar antara 0,021-0,030 m/s dengan arah arus menuju barat daya, suhu antara 29,5-32,6 oC, kadar salinitas berkisar antara 24-28 o/oo, kadar BOT antara 11,152-35,81 mg/liter, kadar DO antara 5,56-6,25 ppm, dan tingkat kecerahan menunjukan 100% jernih hingga dasar. Berat sampah makroplastik yang ditemukan di seluruh stasiun pengamatan berkisar antara 0,075-2,19 Kg dengan rata – rata ukuran sebesar 8,2-15,6 cm. Persentase penutupan lamun total memiliki nilai 26,77 %, hal ini menunjukan kondisi padang lamun di perairan Pulau Kelapa Dua termasuk kedalam kategori sedang.  Garbage is generally something that is wasted or thrown away from the source of the activities of living things and has no economic value. Macroplastic waste is waste that is difficult or even impossible to decompose with the help of microorganisms. Garbage from the mainland will slowly be carried by the waves to the bottom of the ocean which can cause pollution to the ecosystem in the sea. This study aims to determine the effect of macroplastic waste on seagrass conditions in the waters of Kelapa Dua Island, Thousand Islands, Jakarta. The research material used consisted of macro plastic waste taken from seagrass beds, as well as water collected from seagrass beds. The method employed involved the preparation, maintenance of research steps, data collection, and data analysis. Observation of macroplastic waste in the seagrass area was carried out 3 times in one station. The results showed that the tidal type at the observation site had a diurnal tidal type. Current velocity data ranged from 0.021-0.030 m/s with the current direction towards the southwest, temperature between 29.5-32.6 oC, salinity levels ranging from 24-28 o/oo, BOT levels between 11,152-35.81 mg/liters, DO levels are between 5.56-6.25 ppm, and the brightness level shows 100% clear to basic. The weight of macroplastic waste found in all observation stations ranged from 0.075-2.19 Kg with an average size of 8.2-15.6 cm. The percentage of total seagrass cover has a value of 26.77%, this shows that the ","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47077707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ekosistem Terumbu Karang di Pantai Tawang, Kabupaten Pacitan","authors":"Muliawati Handayani, Citra Satrya Utama Dewi","doi":"10.14710/jmr.v12i4.38669","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38669","url":null,"abstract":"Ekosistem terumbu karang merupakan ekosistem yang rentan terdegredasi. Pemanfaatan wilayah sekitaran Pantai Tawang untuk kegiatan wisata, pelelangan ikan dan pembangunan tambak intensif berpotensi menurunkan tutupan karang hidup dan mengganggu fungsi ekologis terumbu karang. Hal ini tentu meningkatkan kerentanan ekosistem karang, selain akibat kenaikan suhu perairan dan faktor hidrooseanografi lainnya. Tutupan karang di pantai Tawang yang terus mengalami penurunan menjadinan alasan perlu upaya pengkajian yang presisi terhadap indeks ekologisnya. Penelitian ini bertujuan untuk mengkaji kondisi ekosistem terumbu karang di Pantai Tawang berdasarkan indeks keanekaragaman, keseragaman dan dominansi. Pengambilan data lifeform, tutupan dan jenis karang dilakukan dengan metode LIT (Intercept Transect). Tutupan rata-rata substrat karang hidup pada tiga lokasi sampling sebesar 33,7% yang berarti bahwa sustrat pada kondisi penilaian yang sedang. Padahal, nilai tutupan karang tahun 2020 sebesar 41,2%. Nilai indeks keanekaragaman karang (H’) pada titik I, II dan III berada pada kelas kisaran 1-<3,0 yang berarti ekosistem memiliki keragaman jenis yang rendah. Indeks keseragaman (E) ketiga titik mendekati 1, yang berarti bahwa jenis karang di ekosistem tersebut cenderung seragam. Sedangkan indeks dominansi (D) di semua titik berada pada kisaran <0,5 dan cenderung mnedekati 1. Hal ini menunjukkan bahwa tidak terdapat spesies yang mendominasi pada komunitas karang di Pantai Tawang.Pelestarian sumberdaya karang penting dilakukan untuk menjaga plasma nutfah yang ada di dalam ekosistem tersebut. Coral reef ecosystems are ecosystems that are potentially degraded. Coastal land use around of Tawang Beach for tourism activities, fish auctions and the intensive aquaculture has the potential to reduce live coral cover and disrupt the ecological functions of coral reefs. Certainly, it was increasing the vulnerability of coral ecosystems, apart from the effects of warming water temperatures and other hydro-oceanographic factors. The coral cover on the Tawang coast continues to decline every year, and it is the reason why precise assessment ecological index needed. This study aims to evaluate coral reef ecosystem in Tawang Beach based on diversity index, uniformity index and dominance index. Collecting data of coral lifeform, cover and species was using the LIT (Intercept Transect) method. The average live coral substrate cover at the three sampling locations was 33.7%, which means that the substrate was in moderate assessment conditions. In fact, the value of coral cover in 2020 was 41.2%. Diversity index (H') values at stations I, II and III are in the 1-<3.0 range, which means that the ecosystem has low species diversity. Evenness index (E) of all stations is close to 1, which means that the types of coral in these ecosystems tend to be uniform. Dominance index (D) at all stations is in <0.5 range and tends to be close to 1. This shows that there are no species that domin","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135524687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penyerapan Karbon Pada Vegetasi Lamun Di Pantai Legon Bajak Pulau Kemujan, Taman Nasional Karimunjawa","authors":"Karla Lutfia Rahmadanti, G. Santosa, Rini Pramesti","doi":"10.14710/jmr.v12i3.37564","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.37564","url":null,"abstract":"Gas karbondioksida yang tinggi di atmosfer dapat memicu pemanasan global. Upaya mitigasi diperlukan untuk mengurangi dampak buruk, salah satunya dengan pemanfaatan lamun sebagai penyerap karbon yang dikenal dengan  blue carbon. Penelitian ini bertujuan mengetahui estimasi biomassa dan kandungan karbon pada vegetasi lamun di Pantai Legon Bajak Pulau Kemujan, Taman Nasional Karimunjawa. Penelitian dilakukan pada 28 – 29 November 2021 dengan dua stasiun. Analisis vegetasi dilakukan menggunakan metode line transect quadrant, yang mengacu pada buku Panduan Monitoring Padang Lamun LIPI. Pengambilan sampel lamun menggunakan seagrass core. Biomassa lamun terbagi menjadi bagian atas substrat (daun) dan bawah substrat (akar dan rhizoma). Nilai biomassa lamun ditentukan melalui berat kering dari dengan cara pengeringan. Nilai kandungan karbon diperoleh melalui metode LOI (Loss of Ignition) atau pengabuan kering.Hasil penelitian diperoleh 5 jenis lamun, antara lain Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis dan Halodule uninervis. Kondisi padang lamun tergolong memiliki penutupan sedang. Nilai biomassa yang terdapat di bawah substrat (585 g/m2) lebih besar dibandingkan yang terdapat di atas substrat (346,73 g/m2), diikuti dengan kandungan karbon di bawah substrat (182,54 gC/m2)yang lebih besar dibandingkan atas substrat (119,43 gC/m2). Vegetasi lamun di lokasi penelitian berpotensi menyimpan karbon sebesar 301,97 gC/ m2. The high level of carbondioxide gas in the atmosphere can trigger global warming. Mitigation efforts are needed to reduce adverse impacts, such as by the optimization of seagrass as a carbon sink which is known as blue carbon. This study aims to determine the estimation of biomass and carbon content in seagrass vegetation at Legon Bajak Beach, Kemujan Island, Karimunjawa National Park. The research was conducted on 28 – 29 November 2021 at two stations. Vegetation analysis was conducted by using the line transect quadrant method, which refers to the LIPI Seagrass Monitoring Guidebook. Seagrass sample was collected by using seagrass core. Seagrass biomass is divided into above substrate (leaves) and below substrate (roots and rhizomes). The value of seagrass biomass was determined through dry weight by drying process in the oven. The value of carbon content in seagrasses is obtained through the LOI (Loss of Ignition) method or dry ignition.The results o the study obtained 5 species of seagrasses, including E. acoroides, T. hemprichii, C. rotundata, H. ovalis and H. uninervis. The condition of seagrass meadows is classified as having moderate cover. The value of the biomass below substrate (585 g/m2) is greater than the value of biomass above the substrate (346.73 g/m2), followed by the value of carbon content below the substrate (182.54 gC/m2) which is greater than above substrate (119.43 gC/m2). Seagrass vegetation in the study site has the potential to store 301.97 gC/m2 of carbon. ","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48534569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifikasi Genus Chaetoceros di Perairan Laut Desa Padelegan Pamekasan","authors":"Novi Indriyawati, Kartika Dewi, Agil Silva Asmarani, Dewi Ayu Lestari, Seliya Fuji Safitri","doi":"10.14710/jmr.v12i4.37078","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.37078","url":null,"abstract":"Chaetoceros sp. merupakan fitoplankton yang banyak ditemukan di perairan laut. Chaetoceros termasuk dalam kelompok Diatom dengan kelas Bacillariophyceae. Di laut spesies ini merupakan makanan alami dari Copepoda, salah satu spesies zooplankton. Sedangkan pada budidaya perikanan digunakan sebagai pakan alami Rotifer dan larva udang. Selain itu, spesies chaetoceros termasuk dalam kelompok saprobe yang berperan sebagai indikator biologis perairan yang tercemar sehingga keberadaannya di laut cukup penting. Tujuan penelitian ini adalah untuk mengidentifikasi jenis fitoplankton dari genus chaetoceros yang mempunyai fungsi penting dalam budidaya perikanan. Penelitian dilakukan dengan mengambil sampel air laut dan fitoplankton pada permukaan badan air (0-50 cm) di perairan laut Desa Padelegan Pamekasan. Waktu pengambilan sampel dilakukan pada pagi, siang dan sore hari dengan dua kali pengulangan. Menggunakan jaring plankton dengan ukuran mesh 10 mikron. Identifikasi fitoplankton menggunakan mikroskop Olympz BX41 dengan perbesaran 10x. Berdasarkan hasil penelitian, telah ditemukan 12 spesies Chaetoceros dengan kelimpahan 700–9100 ind/L. Pada malam hari tidak ditemukan spesies chaetoceros karena faktor pembatas pertumbuhan mikroalga adalah sinar matahari. Semakin banyak sinar matahari yang masuk ke perairan, maka semakin banyak pula fitoplankton yang tersebar. Chaetoceros sp is a phytoplankton commonly found in marine waters. Chaetoceros belongs to the Diatom group with the class of Bacillariophyceae. In the sea this species is a natural food of copepod, one of species of zooplankton. While in aquaculture, it is used as natural feed for Rotifers and shrimp larvae. In addition, chaetoceros species are included in the saprobes group, which acts as a biological indicator of polluted waters, so their presence in the sea is quite important. The purpose of this study was to identify phytoplankton species from the genus of chaetoceros which has an important function in aquaculture. The research was carried out by taking samples of seawater and phytoplankton on the surface of the water body (0-50 cm) in the sea waters of Padelegan Pamekasan Village. Sampling time was carried out in the morning, afternoon and evening with two repetitions.using a plankton net with a mesh size of 10 microns. Identification of phytoplankton using an Olympz BX41 microscope with 10x magnification. Based on result, 12 species of Chaetoceros have been found with an abundance of 700–9100 ind/L. At night, no chaetoceros species were found because the limiting factor for microalgae growth was sunlight. The more sunlight that enters the waters, the more phytoplankton are scattered.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135524688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Nilai Estetika Pulau Gili Labak Kabupaten Sumenep Dengan Metode Scenic Beauty Estimation (SBE)","authors":"A. Wahyudi, Dyah Ayu Sulistyo Rini, Firman Farid Muhsoni","doi":"10.14710/jmr.v12i3.37149","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.37149","url":null,"abstract":"Keanekaragaman hayati laut dan kepulauan mempunyai daya tarik wisata yang potensial untuk dikembangkan. Pulau kecil dengan kondisi terumbu karang yang baik menjadi obyek wisata yang sangat diminati.Tujuan penelitian ini adalah mengetahui kondisi terumbu karang dan evaluasi keindahan Pulau Gili Labak Sumenep.Metode pengukuran terumbu karang menggunakan metode LIT (Line Intercept Transect) dan Metode Scenic Beauty Estimation (SBE) digunakan untuk menilai dan menganalisis kualitas pemandangan lanskap. Metode ini menggunakan kuisioner berisi dokumentasi (foto lokasi) dengan foto lokasi pembanding (Pulau Gili Trawangan sebagai pembanding).Hasil penelitian menunjukkan karang hidup 63,1%, karang mati 33,1%, fauna lain 0,6%, algae 3,61% dan abiotik 2,6%.  Rasio kematian karang (Indeks mortalitas) masuk dalam kategori sedang (0,35). Hasil analisa SBE menunjukkan dari 15 foto yang dibandingkan ada 5 foto yang nilainya positif dan 10 foto yang nilainya negatif.Hal ini menunjukkan ada 5 lokasi lanskap yang lebih baik di Pulau Gili Labak, dan ada 10 lokasi lanskap yang lebih baik di lokasi pembanding. Nilai terendah terdapat -8.36 pada foto lanskap 13 dan nilai tertinggi  6,26 pada foto lanskap 3. Pada kawasan yang memiliki nilai yang rendah perlu dilakukan perlakukan khusus untuk meningkatkan nilai lanksap.Fasilitas yang kurang menarik menjadikan alasan beberapa foto lanskap menjadi rendah, perlu pengembangan fasilitas untuk menunjang kepuasan pengunjung. Marine biodiversity and archipelagic have a potential tourist attraction to be developed. Small island with good Coral reef condition are very popular tourist attractions. The purpose of this study is to determine the condition of Coral reefs condition and evaluate the beauty of Gili Labak Island, Sumenep. The method of Coral reef measurement uses LIT (Line Intercept Transect) method and the Scenic Beauty Estimation (SBE) method is used to assess and analyze the quality of landscape views. This method uses a questionnaire containing documentation (location photos) with photos of comparison location (Gili Trawangan Island as comparison) athe results showed live coral 63.1%, dead coral 33.1%, other fauna 0.6%, algae 3.61%, and abiotic 2.6%. Coral mortality ratio (mortality index) is in the moderate category (0.35). The results of SBE Analysis showed that from 15 photos that were compared, there were 5 photos with positive values and 10 photos with negative values. This shows that there are 5 better landscape locations on Gili Labak Island, and there are 10 better landscape locations on the comparison location. The lowest value is -8.36 for landscape photos 13 and the highest value is 6.26 for landscape photos 3. In areas with low values, special treatment is needed to increase the landscape value. Unattractive facilities are the reason why some landscape photos are low, it is necessary to develop facilities to support visitor satisfaction.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47273971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimasi Konsentrasi dan Stok Karbon Organik pada Sedimen Lamun di Desa Selangan, Kalimantan Timur","authors":"Andi Fitri Sakmiana, Mohammad Sumiran Paputungan, Widyanti Kusumaningrum, Susi Rahmawati","doi":"10.14710/jmr.v12i3.38011","DOIUrl":"https://doi.org/10.14710/jmr.v12i3.38011","url":null,"abstract":"Informasi mengenai stok karbon di sedimen ekosistem lamun di Indonesia masih sedikit, khususnya di Kalimantan Timur. Penelitian ini bertujuan untuk mengestimasi stok karbon organik pada sedimen lamun yang berada di perairan sekitar Desa Selangan, pesisir Bontang. Pengambilan sampel sedimen dilakukan pada bulan September 2021, dengan menggunakan pipa PVC yang berdiameter 7 cm dengan panjang 130 cm. Pengambilan sampel sedimen berjumlah 3 core dimulai dari titik lamun yang berdekatan dengan ekosistem mangrove ke arah laut dengan jarak 50 m antar stasiun. Konsentrasi karbon organik sedimen diukur menggunakan metode loss on ignition (LOI) yang dilakukan di Laboratorium Botani Pusat Riset Oseanografi BRIN. Hasil penelitian menunjukkan konsentrasi karbon organik pada lokasi penelitian berkisar 1,70-4,90% dengan nilai rata-rata sebesar 2,72 ±0,20 %. Estimasi stok karbon sedimen lamun yang terdapat di perairan sekitar Desa Selangan adalah 210,94 Mg C/ha. Tidak terdapat perbedaan signifikan pada konsentrasi dan stok karbon organik antar lapisan sedimen. Namun, kedua nilai tersebut cenderung rendah pada lokasi lamun yang berada jauh dari ekosistem mangrove. The available information on sediment organic carbon stock data of the seagrass ecosystem in Indonesia is limited, especially in East Kalimantan. This study aimed to estimate the concentration and stock of organic carbon in seagrass sediment in Selangan, a coastal area of Bontang. Field activities to collect sediment samples were done in September 2021 by using 7-diameter PVC tube core with 130 cm length. Three sediment cores were collected from seagrass adjacent to mangrove ecosystem with 50 m interval between the cores toward the sea. Organic carbon concentration in sediment measured by using loss on ignition method that was performed in Botanical Laboratory of Research Center for Oceanography BRIN. The results showed that the concentration of organic carbon at the study sites ranged from 1.70-4.90% with average at 2.72 ±0.20%. Organic carbon stocks in seagrass sediments in Selangan were estimated at 210.94 Mg C/ha. Both sediment organic carbon concentration and storage values were no significant difference through the layer of sediments. However, both values tend to low in seagrass sediment which were far from mangrove ecosystem.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48986835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}