Journal of Marine Research最新文献

{"title":"Isolasi dan Karakterisasi Bakteri Asosiasi Daun Cymodocea serrulata di Perairan Pulau Panjang, Jepara","authors":"Alin Setiyorini, Delianis Pringgenies, Ali Ridlo","doi":"10.14710/jmr.v12i4.38169","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38169","url":null,"abstract":"Lamun merupakan jenis tumbuhan berbunga yang mampu hidup terendam di laut dan memiliki banyak manfaat. Lamun memiliki banyak peran penting bagi ekossitem laut salah satu contohnya adalah sebagai sediment trap dan juga pemfiksasi CO2. Lamun juga memiliki fungsi penting lain bagi biota yang hidup di ekosistem lamun, mulai dari tempat berlindung dari predator, spawning dan feeding ground. Spesies Cymodocea sp. merupakan salah satu genus lamun yang dapat ditemukan di Pulau Panjang, Jepara. Lamun memiliki organisme asosiasi, salah satunya bakteri asosiasi yang memegang peranan penting secara biologi dan ekologis antar interaksi tumbuhan lamun dengan lingkungannya. Penelitian ini bertujuan untuk mengetahui spesies lamun yang digunakan dan mengetahui adanya bakteri asosiasi pada daun lamun tersebut. spesies lamun diidentifikasi secara morfologi sesuai buku panduan identifikasi LIPI. Bakteri asosiasi lamun diisolasi dari daun lamun dengan menggunakan metode pengenceran berseri. Isolat bakteri tersebut dikarakterisasi secara morfologi untuk mendapatkan isolat bakteri dengan ciri morfologi yang berbeda. Lamun dan bakteri asosiasi dapat menghasilkan senyawa bioaktif yang mirip antara keduanya sehingga dapat dimanfaatkan dalam bidang bioteknologi dan farmasi laut. Hasil penelitian menunjukkan bahwa spesies lamun yang digunakan adalah jenis Cymodocea serrulata. Hasil penelitian juga menunjukkan bahwa terdapat 7 isolat bakteri asosiasi daun lamun yang berhasil diisolasi dan memiliki karakteristik morfologi yang berbeda. Keberadaan bakteri asosiasi pada daun lamun ini memberikan informasi tentang terjadinya hubungan interaksi antara bakteri dan tumbuhan lamun. Seagrass is a type of flowering plant that can live submerged in the sea and has many benefits. Seagrass has many important roles for marine ecosystems, one example is as a sediment trap and also a CO2 fixer. Seagrasses also have other important functions for biota that live in seagrass ecosystems, starting from shelter from predators, spawning and feeding ground. Species Cymodocea sp. is one of the seagrass genera that can be found on Panjang Island, Jepara. Seagrass has associated organisms, one of which is associated bacteria which play an important role biologically and ecologically in the interaction between seagrass plants and their environment. This study aims to determine the species of seagrass used and to determine the presence of associated bacteria in the seagrass leaves. Seagrass species were identified morphologically according to the LIPI identification guide. Seagrass-associated bacteria were isolated from seagrass leaves using serial dilution method. The bacterial isolates were characterized morphologically to obtain bacterial isolates with different morphological characteristics. Seagrasses and associated bacteria can produce bioactive compounds that are similar between the two so that they can be used in marine biotechnology and pharmaceuticals. The results showed that the seagrass spec","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252466","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":"Variabilitas Konsentrasi dan Sebaran N-anorganik (Amonia, Nitrit, dan Nitrat) Terlarut di Perairan Kalianda dan Perairan Anyer-Panimbang","authors":"Moh Muhaemin, Dewi Alfya Rahmadita, Joko Suwiryono, Henky Mayaguezz","doi":"10.14710/jmr.v12i4.38566","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38566","url":null,"abstract":"N-anorganik yang berdekatan dengan hatchery atau tambak, permukiman warga, dan muara sungai diduga bersebaran berbeda di perairan teluk dan perairan selat. Penelitian bertujuan untuk menganalisis sebaran horizontal, tingkat kesesuaiannya terhadap baku mutu, serta menganalisis konektivitas antara konsentrasi amonia, nitrit, dan nitrat dengan parameter fisika dan kimia non nitrogen di perairan Kalianda (perairan Teluk) dan perairan Anyer-Panimbang (menghadap Selat Sunda). Penelitian dilaksanakan di perairan Kalianda dan perairan Anyer-Panimbang pada bulan September dan Oktober 2022. Konsentrasi amonia, nitrit, dan nitrat tersebut dianalisis, dibuat sebaran horizontalnya, serta dianalisis konektivitas antar variabelnya dengan Principal Component Analysis (PCA). Hasil penelitian menunjukkan bahwa sebaran horizontal konsentrasi amonia yang cenderung tinggi didominasi oleh lokasi muara sungai di perairan Kalianda, sebaran horizontal konsentrasi nitrit yang cenderung tinggi didominasi oleh lokasi yang berdekatan dengan hatchery atau tambak di perairan Kalianda dan perairan Anyer-Panimbang, dan sebaran horizontal konsentrasi nitrat yang cenderung tinggi didominasi oleh lokasi dekat permukiman warga di perairan Anyer-Panimbang. Secara dominan, konsentrasi amonia dan nitrit di perairan Kalianda dan perairan Anyer-Panimbang di bawah baku mutu, kecuali konsentrasi nitrit di Pantai Sambolo pada perairan Anyer-Panimbang yang melebihi baku mutu, serta seluruh konsentrasi nitrat di perairan Kalianda dan perairan Anyer-Panimbang di atas baku mutu. Konsentrasi amonia, nitrit, dan nitrat berkorelasi positif dengan parameter suhu, namun berkorelasi negatif dengan parameter DO dan salinitas. Inorganic nitrogen potential sources such as hatcheries/ponds, residential areas, and estuaries may affect loading capacity of n-inorganic in bay and strait waters. The concentration distributions of ammonia, nitrite, and nitrate in the bay and strait waters may have different values. The study aims was to analyze the horizontal distribution and suitability of ammonia, nitrite, and nitrate concentrations with quality standard, and to analize the intercorrelation between the concentrations of ammonia, nitrite, and nitrate with non nitrogen physical and chemical parameters in Kalianda waters and Anyer-Panimbang waters. The study was carried out in specific location of Kalianda and Anyer-Panimbang waters in September and October 2022. The concentrations of ammonia, nitrite, and nitrate were analyzed for their concentration distributions and analyzed using the Principal Component Analysis (PCA) method. The results showed that the horizontal distribution of ammonia concentrations was dominated by location of estuary in Kalianda waters, the horizontal distribution of nitrite concentrations was dominated by location near hatchery or pond in Kalianda waters and Anyer-Panimbang waters, and the horizontal distribution of nitrate concentrations was dominated by location near residential are","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252467","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":"Suplementasi Alginat dan Spirulina Meningkatkan Ketahanan Udang Litopenaeus vannamei Terhadap Pajanan Salinitas","authors":"Alisa Sukma Adella, Ervia Yudiati, Sri Sedjati","doi":"10.14710/jmr.v12i4.37937","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.37937","url":null,"abstract":"Permintaan pasar yang tinggi membuat Litopenaeus vannamei menjadi komoditas penting yang perlu ditingkatkan produksinya. Salah satu upaya peningkatan produksi budidaya udang adalah dengan memberikan pakan yang sesuai dengan kebutuhan. Penelitian ini bertujuan untuk mengetahui pengaruh dari suplementasi alginat dan Spirulina dalam pakan udang pada ketahanan terhadap tingkat kelangsungan hidup, stres salinitas, serta pertumbuhan panjang dan berat dari post-larvae L. vannamei. Metode penelitian dilakukan dengan suplementasi selama 14 hari yang terdiri dari K (kontrol), perlakuan AS 1 (Alg 1 g+Spr 1 mg/kg), perlakuan AS 2 (Alg 2 g+Spr 2 mg/kg), dan perlakuan AS 3 (Alg 3 g+Spr 5 mg/kg) dengan masing-masing 4 pengulangan. Tingkat kelangsungan hidup L. vannamei dihitung kemudian dilakukan uji stres salinitas dengan menempatkan udang dari media bersalinitas 25 ppt menjadi 0 ppt. Kelulushidupan udang dicatat setiap 10 menit hingga kematian mencapai >50% dari total udang keseluruhan. Hasil penelitian menunjukan tingkat kelangsungan hidup tertinggi diperoleh pada udang dengan perlakuan K (87,5%), diikuti AS 1 (85,5%), AS 2 (85%), dan AS 3 (79,5%). Ketahanan terhadap salinitas dengan waktu terlama secara berurutan terjadi pada udang dengan perlakuan AS 1 (100 menit), AS 2 (90 menit) serta K (80 menit) dan AS 3 (80 menit). Pertumbuhan panjang tertinggi terdapat pada AS 3 (0,940 cm), AS 2 (0,926 cm), AS 1 (0,897 cm), dan K (0,890 cm). Pertumbuhan berat tergolong sama pada K (0,023 g), AS 1 (0,023 g), dan AS 3 (0,023 g) dan berat terkecil terdapat pada perlakuan AS 2 (0,018 g). High market demand makes Litopenaeus vannamei an important commodity that needs to be increased in production. One of the efforts to increase the production of shrimp aquaculture is to provide feed according to the needs. This study aims to determine the effect of alginate and Spirulina supplementation in shrimp feed on resistance to survival, salinity stress, and growth in length and weight of L. vannamei post-larvae. The research method was carried out by supplementation for 14 days consisting of K (control), AS 1 treatment (Alg 1 g+Spr 1 mg/kg), AS 2 treatment (Alg 2 g+Spr 2 mg/kg), and AS 3 treatments. (Alg 3 g+Spr 5 mg/kg) with 4 repetitions each. The survival rate of L. vannamei was calculated then a salinity stress test was carried out by placing the shrimp from media with a salinity of 25 ppt to 0 ppt. Shrimp survival was recorded every 10 minutes until death reached > 50% of the total shrimp. The results showed that the highest survival rate was obtained in shrimp treated with K (87.5%), followed by AS 1 (85.5%), AS 2 (85%), and AS 3 (79.5%). Resistance to salinity with the longest time sequentially occurred in shrimp treated with AS 1 (100 minutes), AS 2 (90 minutes) and K (80 minutes) and AS 3 (80 minutes). The highest growth in length was found in AS 3 (0.940 cm), AS 2 (0.926 cm), AS 1 (0.897 cm), and K (0.890 cm). Weight growth was the same in K (0.023 g), AS 1 (0.023 ","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252784","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":"Asosiasi Megabenthos pada Ekosistem Lamun di Pulau Panjang dan Pantai Prawean Bandengan, Jepara","authors":"Noviyani Saputri, Ita Riniatsih, Widianingsih Widianingsih","doi":"10.14710/jmr.v12i4.38410","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38410","url":null,"abstract":"Megabenthos termasuk biota laut yang hidup dengan menetap diatas substrat maupun membenamkan diri dalam substrat. Penelitian ini dilakukan dengan tujuan untuk membandingkan kelimpahan jenis megabenthos pada ekosistem lamun di Perairan Pulau Panjang dan Perairan Pantai Prawean Bandengan. Metode penelitian yang digunakan adalah observasi dan penentuan stasiun menggunakan metode purposive sampling. Pengambilan data megabenthos dan lamun dilakukan di Perairan Pulau Panjang dan Perairan Pantai Prawean Bandengan secara purposive sampling dengan menggunakan metode line transect Panduan Monitoring Padang Lamun. Perairan Pulau Panjang ditemukan 11 jenis megabenthos dari 4 kelas (Bivalvia, Gastropoda, Holothuroidea, dan Echinoidea). Perairan Pantai Prawean Bandengan ditemukan 7 jenis dari 2 kelas (Bivalvia dan Gastropoda). Perairan Pulau Panjang mendapatkan kelimpahan total megabenthos sebesar 9,45-20,73 ind/m2 dengan kelimpahan jenis terbesar ditemukan pada Paphia undulata dan Diadema setosum dengan nilai 2,79 ind/m2, serta kelimpahan jenis terkecil ditemukan pada Canarium labiatum dengan nilai 0,61 ind/m2. Perairan Pantai Prawean Bandengan mendapatkan kelimpahan total megabenthos sebesar 5,45-11,39 ind/m2 dengan kelimpahan jenis terbesar ditemukan pada Cerithium traillii dengan nilai 3,15 ind/m2 dan kelimpahan jenis terkecil ditemukan pada Canarium labiatum dengan nilai 0,36 ind/m2. Tingginya kelimpahan megabenthos pada ekosistem lamun di Perairan Pulau Panjang dipengaruhi oleh jumlah megabenthos, parameter perairan, kandungan bahan organik, dan karakteristik substrat perairan. Megabenthos includes marine biota that lives by staying on the substrate or immersing themselves in the substrate. This research was conducted with the aim of comparing the abundance of megabenthos species in seagrass ecosystems in Pulau Panjang and Prawean Bandengan waters. The research method used is observation and station determination using the purposive sampling method. Megabenthos and seagrass data were collected from Pulau Panjang and Prawean Bandengan waters using purposive sampling using the line transect method. Long Island waters found 11 species of megabenthos from 4 classes (Bivalvia, Gastropoda, Holothuroidea, and Echinoidea). Prawean Bandengan beach waters found 7 species from 2 classes (Bivalvia and Gastropods). Long Island waters had a total megabenthos abundance of 9.45–20.73 ind/m2, with the highest species abundance found in Paphia undulata and Diadema setosum with a value of 2.79 ind/m2, and the smallest species abundance found in Canarium labiatum with a value of 0.61 ind/m2. The waters of Prawean Bandengan Beach obtained a total megabenthos abundance of 5.45–11.39 ind/m2, with the largest species abundance found in Cerithium traillii with a value of 3.15 ind/m2 and the smallest species abundance found in Canarium labiatum with a value of 0.36 ind/m2. The high abundance of megabenthos in seagrass ecosystems in Pulau Panjang waters is influenced by the number","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252468","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 Tingkat Keberhasilan Rehabilitasi Rhizophora apiculata di Kawasan Mangrove Manawa, Kabupaten Pohuwato, Gorontalo","authors":"Falerins Labuga, Novri Youla Kandowangko, Dewi Wahyuni Kyai Baderan","doi":"10.14710/jmr.v12i4.38630","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38630","url":null,"abstract":"Manawa merupakan salah satu kawasan di wilayah Kabupaten Pohuwato yang mengalami kerusakan hutan mangrove akibat alih fungsi hutan menjadi lahan tambak dan perkebunan. Rusaknya hutan mangrove berdampak pada berkurangnya berbagai biota laut diantaranya udang, kepiting, dan berbagai jenis ikan. Salah satu upaya perbaikan adalah dengan melakukan rehabilitasi hutan mangrove. Rehabilitasi merupakan salah satu upaya pemulihan ekosistem mangrove pada kondisi semula. Penelitian ini bertujuan untuk mengukur tingkat keberhasilan rehabilitasi Rhizophora apiculata, mengukur tingkat pertumbuhan Rhizophora apiculata, dan menganalisis faktor-faktor yang mempengaruhi keberhasilan Rhizophora apiculata yang di rehabilitasi di kawasan mangrove Manawa, Kecamatan Patilanggio, Kabupaten Pohuwato, Gorontalo. Analisis keberhasilan mangrove menggunakan analisis deskriptif kuantitatif, dan faktor lingkungannya menggunakan analisis deskriptif. Hasil penelitian menemukan bahwa tingkat keberhasilan rehabilitasi dinilai berhasil. Hal ini dibuktikan dengan persentase keberhasilan hidup Rhizophora apiculata mencapai 79.51%. Tingkat pertumbuhan Rhizophora apiculata baik dari segi tinggi tanaman maupun jumlah daun mengalami pertambahan namun tidak merata pada seluruh plot. Faktor-faktor yang mempengaruhi keberhasilan rehabilitasi mangrove yaitu salinitas dan suhu masih dalam kisaran yang sesuai untuk Rhizophora apiculata. Substrat pada lokasi penelitian didominasi oleh substrat pasir debu. Hama yang ditemukan pada lokasi penelitian tergolong sedang dan didominanasi hama dari kelas Gastropoda. Manawa, a village in Pohuwato Regency, has suffered damage to its mangrove forest because it was converted into ponds and plantations. A variety of marine biota is reduced when mangrove forests are destroyed, including shrimp, crabs, and a variety of fish species. In the process of improving the ecosystem, one of the improvements is the rehabilitation of mangrove forests. In order to restore the mangrove ecosystem to its original state, rehabilitation is one of the methods. The purpose of this study is to evaluate the success rate of Rhizophora apiculata rehabilitation, measure its growth rate, and determine the factors influencing Rhizophora apiculata rehabilitation in the Manawa Mangrove area, Patilanggio District, Pohuwato Regency, Gorontalo. The success of mangroves was analyzed using quantitative descriptive analysis, and environmental factors were analyzed using descriptive analysis. Results of the study showed that rehabilitation success rates were higher than expected. This is evidenced by Rhizophora apiculata's survival rate, which reached 79.51%. A higher growth rate in plant height and leaves has been observed in Rhizophora apiculata, but not uniformly across the plots. Salinity and temperature, two factors that affect mangrove rehabilitation, remain within the appropriate range for Rhizophora apiculata. The study site substrate is dominated by sand and dust. The pests at the stud","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252788","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":"Pola Distribusi Dan Kepadatan Populasi Bulu Babi (Tripneustes gratilla Linnaeus, 1758) di Ekosistem Intertidal Pantai Bilik Taman Nasional Baluran","authors":"Rendy Setiawan, Arif Mohammad Siddiq, Arif Pratiwi, Arif Pratiwi, Miftha Amilia Dwi Susanto","doi":"10.14710/jmr.v12i4.37933","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.37933","url":null,"abstract":"Spesies Tripneustes gratilla merupakan bulu babi yang termasuk anggota dari kelas Echinoidea. Hewan ini dapat ditemukan di ekosistem intertidal dan tergolong sebagai biota bentik yang sering ditemukan di ekosistem terumbu karang dan padang lamun. Spesies T. gratilla memiliki nilai ekologis yang penting dalam menjaga keseimbangan ekosistem laut, yaitu sebagai herbivor dan juga sebagai spesies kunci yang mampu mengendalikan pertumbuhan makroalga yang hidup di ekosistem terumbu karang. Tujuan dari penelitian ini adalah menentukan pola distribusi dan kepadatan populasi T. gratilla di ekosistem intertidal Pantai Bilik Taman Nasional (TN) Baluran. Metode menentukan pola distribusi dilakukan metode transek plot sistematis dengan cara meletakkan plot paralon berukuran 1x1 m di sepanjang transek garis. Pola distribusi T. gratilla di ekosistem intertidal Pantai Bilik TN Baluran tergolong mengelompok berdasarkan hasil analisis menggunakan Indeks Morisita dengan nilai Id sebesar 4.8. Kepadatan T. gratilla di ekosistem intertidal Pantai Bilik TN Baluran tergolong rendah dengan nilai kepadatan 0.2 Ind/m2 atau apabila dikonversikan maka hanya ada 2 individu dalam area plot seluas 10 m2. Tripneustes gratilla is a sea urchin that belongs to the class Echinoidea. These animals can be found in intertidal ecosystems and are classified as benthic biota which are often found in coral reef and seagrass ecosystems. The species T. gratilla has an important ecological value in maintaining the balance of marine ecosystems, namely as a herbivore and also as a key species capable of controlling the growth of macroalgae that live in coral reef ecosystems. The purpose of this study was to determine the pattern of distribution and population density of T. gratilla in the intertidal ecosystem of Bilik Beach, Baluran National Park. The method of determining the distribution pattern is carried out using the systematic plot transect method by placing 1x1 m paralon plots along the line transects. The distribution pattern of T. gratilla in the intertidal ecosystem of Bilik Beach, Baluran National Park, is classified as clustered based on the results of an analysis using the Morisita Index with an Id value of 4.8. The density of T. gratilla in the intertidal ecosystem of Bilik Beach, Baluran National Park, is low, with a density value of 0.2 Ind/m2 or when converted, there are only 2 individuals in a plot area of 10 m2.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252465","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":"Komposisi Jenis dan Kelimpahan Perifiton Pada Daun Lamun Oceana serrulata di Perairan Pulau Panjang dan Pantai Prawean Bandengan, Jepara","authors":"Anastasya Devi Septanovia Islam, Suryono Suryono, Ita Riniatsih","doi":"10.14710/jmr.v12i4.38681","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.38681","url":null,"abstract":"Padang lamun merupakan ekosistem pesisir berfungsi sebagai tempat mencari makanan, berlindung, serta berkembang biak. Perifiton ditemukan melekat pada permukaan daun lamun, dapat menjadi faktor pendukung produktivitas primer tetapi dapat juga mengurangi cahaya yang masuk untuk fotosintesis, sehingga dapat mengurangi komposisi padang lamun. Penelitian ini bertujuan untuk mengetahui komposisi jenis perifiton dan kelimpahan perifiton pada lamun Oceana serrulata di Pulau Panjang dan Pantai Prawean Bandengan, Jepara. Metode penelitian dilakukan dengan menggunakan metode survei. Penentuan lokasi sampling dilakukan dengan metode purposive sampling. Pendataan data kerapatan lamun dilakukan menggunakan metode line transek kuadran. Preparasi sampel daun lamun dilakukan guna mengetahui komposisi perifiton menggunakan metode pengerikan menggunakan kuas dan diamati menggunakan mikroskop. Jenis perifiton yang ditemukan pada daun lamun Oceana serrulata terdiri dari 2 genus (Cyanophyceae) dan 11 genus (Bacillariophyceae). Nilai kelimpahan perifiton pada daun lamun Oceana serrulata di Pulau Panjang dan Pantai Prawean Bandengan adalah 5349,98 ind/cm2 dan 8357,37 ind/cm2. Keberadaan perifiton di Pulau Panjang lebih sedikit dibandingkan dengan Pantai Prawean Bandengan. The seagras ecosystem are coastal ecosystems that function as places to find food, shelter, and breed. Periphyton was found attached to the surface of seagrass leaves, which can be supporting factor for primary productivity but can also reduce incoming light for photosynthesis, thereby reducing the composition of seagrass beds. This study aims to determine the composition of periphyton species and the abundance of periphyton in seagrass Oceana serrulata on Panjang Island and Prawean Bandengan Beach, Jepara. The research method was carried out using a survey method. Determination of sampling locations was determined using a purposive sampling method. Data collection on seagrass density was carried out using the quadrant transect method. Seagrass leaf sample preparation was carried out to determine the composition of periphyton using the scraping method using a brush and observed using a microscope. The types of periphyton found on the leaves of seagrass Oceana serrulata consist of 2 genera (Cyanophyceae) and 11 genera (Bacillariophyceae). Periphyton abundance values in leaves of seagrass Oceana serrulata on Panjang Island and Bandengan Prawean Beach were 5349.98 ind/cm2 and 8357.37 ind/cm2. The presence of periphyton on Panjang Island is less than on Prawean Bandengan Beach.","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252787","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 Konsentrasi Nitrat Dan Fosfat Terhadap Kelimpahan Fitoplankton Di Perairan Sengkarang Pekalongan","authors":"Ardhatama Zafron Dzakwan, Hadi Endrawati, Raden Ario","doi":"10.14710/jmr.v12i4.35259","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.35259","url":null,"abstract":"Peran penting nitrat dan fosfat sangat berpengaruh sekali terhadap pertumbuhan dan perkembangan biota yang ada di laut. Kedua nutrien ini sangat dibutuhkan dalam pembentukan sel jaringan pada organisme laut maupun proses fotosintesis yang terjadi pada organisme seperti fitoplankton. Salah satu parameter biologi yang erat kaitanya dengan nutrien seperti nitrat dan fosfat yaitu fitoplankton. Tingkat kelimpahan dari fitoplankton dapat dipengaruhi oleh konsentrasi nitrat fosfat yang ada di perairan tersebut. Adapun tujuan dilakukanya kajian mengenai konsentrasi nitrat dan fosfat dengan kelimpahan fitoplankton yaitu untuk mengetahui konsentrasi nitrat dan fosfat kaitanya dengan kelimpahan fitoplankton yang berada di perairan Sengkarang. Konsentrasi nitrat memiliki kisaran antara 0,001-0,118 mg/L. Stasiun 1 memiliki konsentrasi nitrat yang berkisar antara 0,022-0,118 mg/L. Stasiun 2 memiliki konsentrasi nitrat 0,001 mg/L pada semua titik. Stasiun 3 memiliki konsentrasi nitrat 0,001 mg/L pada semua titik. Konsentrasi Fosfat di perairan Sengkarang Pekalongan berkisar antara 0,002-0,005 mg/L. Stasiun 1 memiliki konsentrasi fosfat yang berkisar antara 0,003-0,005 mg/L. Stasiun 2 memiliki konsentrasi fosfat yang berkisar antara 0,002-0,004 mg/L. Stasiun 3 memiliki konsentrasi fosfat yang berkisar antara 0,002-0,004 mg/L. Kelimpahan fitoplankton dengan hasil yang terendah yaitu pada stasiun 1 sebesar 561,5349 ind/L. Kemudian hasil kelimpahan tertinggi yaitu pada stasiun 2 sebesar 2246,1394 ind/L dan pada stasiun 3 yaitu sebesar 655,1240 ind/L. Keberadaan nitrat dan fosfat di perairan Sengkarang dapat dikatakan tidak signifikan berpengaruh terhadap fitoplankton karena nilai korelasi (r) sebesar 0,403 untuk nitrat dan 0,271 untuk fosfat.The important role of nitrates and phosphates is very influential on the growth and development of biota in the sea. Both of these nutrients are needed in the formation of tissue cells in marine organisms and the photosynthesis process that occurs in organisms such as phytoplankton. One biological parameter that is closely related to nutrients such as nitrates and phosphates is phytoplankton. The level abundance of phytoplankton can be influenced by the concentration of nitrate phosphate present in these waters. The purpose of the study on the concentration of nitrate and phosphate with an abundance of phytoplankton is to determine the concentration of nitrate and phosphate associated with the abundance of phytoplankton in the water of Sengkarang. Nitrate concentration has a range between 0.001-0.118 mg/L. Station 1 has nitrate concentrations ranging from 0.022-0.118 mg/L. Station 2 had a nitrate concentration of 0.001 mg/L at all points. Station 3 had a nitrate concentration of 0.001 mg / L at all points. Phosphate concentration in the waters of Sengkarang Pekalongan ranged from 0.002-0.005 mg/L. Station 1 has a phosphate concentration that ranges from 0.003-0.005 mg/L. Station 2 has a phosphate concentration that ranges from ","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135252786","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":"Studi Persebaran Kandungan Fosfat dan Material Padatan Tersuspensi di Perairan Muara Sungai Slamaran, Kota Pekalongan","authors":"Farras Daffa Arfastya, Sri Yulina Wulandari, Azis Rifai","doi":"10.14710/jmr.v12i4.41538","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.41538","url":null,"abstract":"Kota Pekalongan dilalui oleh sungai Slamaran yang menjadi tempat masuknya fosfat dari darat ke laut. Fosfat adalah nutrient yang terkandung dalam bahan organik dari limbah domestik maupun pertambakan yang mempengaruhi kesuburan perairan muara Sungai Slamaran. Konsentrasi fosfat di perairan dapat dipengaruhi oleh material padatan tersuspensi (MPT). Penelitian ini bertujuan mengkaji persebaran konsentrasi fosfat dan MPT serta mengkaji hubungan antara sebaran fosfat dan MPT di muara sungai Slamaran, kota Pekalongan. Data lapangan diambil secara in situ. Sampel air dianalisis di laboratorium. Analisis fosfat menggunakan metode yang digunakan oleh Strickland dan Parson (1968). Analisis MPT menggunakan metode gravimetri. Peta sebaran konsentrasi fosfat dan MPT dibuat dengan software ArcGis. Arus permukaan laut dimodelkan dengan software Mike 21 selanjutnya divalidasi dengan nilai RMSE dan MAE. Analisis korelasi Pearson digunakan untuk menentukan korelasi antara konsentrasi fosfat dan MPT. Hasil penelitian menunjukkan bahwa nilai konsentrasi fosfat memiliki rentang 0.44–1,84 µM, dan konsentrasi MPT memiliki rentang 56-152 mg/L. Berdasarkan peta persebaran fosfat dan MPT di perairan muara Sungai Slamaran, diduga bahwa persebaran fosfat dan MPT mendapat pengaruh dari masukan sungai dan tambak udang yang berada di muara sungai Slamaran. Hasil analisis korelasi menunjukkan korelasi yang tidak cukup kuat antara sebaran konsentrasi fosfat dengan sebaran MPT. Pekalongan city is crossed Slamaran River which is entry point phosphate from the land to the sea. Phosphate is a nutrient contained in organic material from domestic waste and aquaculture which affects the productivity of the waters of Slamaran river estuary. Phosphate concentrations in waters can be influenced by suspended solids (TSS). The aims of this study were to determine concentration of phosphate and TSS distribution and to examine correlation between phosphate and TSS concentrations in Slamaran River estuary. In situ data were taken at Slamaran River estuary. Water samples were analyzed at laboratory. Phosphate concentration analysis used method by Strickland and Parson (1968). TSS concentration analysis used gravimetric method. Distribution of Phosphate and TSS concentration were mapped using ArcGIS software. Ocean surface currents was numerically modeled used Mike 21 software then validated with RMSE and MAE methods. Pearson correlation method was used to analyzed correlation between phosphate and TSS concentration. The results showed that phosphate concentration were ranged from 0.44–1,84 µM mg/L and TSS concentration were ranged from 56-152 mg/L. Based on distribution map of phosphate and TSS in the Slamaran River estuary, it was predicted that phosphate and TSS distribution influenced by inputs from the river and shrimp ponds along the estuary Slamaran river. Results of the correlation analysis showed that correlation between phosphate and TSS concentrations distribution was not strong enou","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135302865","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 Simpanan Karbon dan Bioekologi Lamun di Pantai Prawean, Jepara","authors":"Vionita Endarwantti, Ali Djunaedi, Gunawan Widi Santosa","doi":"10.14710/jmr.v12i4.35699","DOIUrl":"https://doi.org/10.14710/jmr.v12i4.35699","url":null,"abstract":"Perubahan iklim global yang semakin meningkat dapat menyebabkan kenaikan kadar karbondioksida pada atmosfer. Lamun dapat mengurangi kadar karbondioksida pada atmosfer dengan cara menyerap karbon anorganik melalui proses fotosintesis lamun dan menyimpannya dalam bentuk karbon organik dalam jangka waktu lama. Oleh karena itu penelitian ini bertujuan untuk mengetahui komposisi jenis, kerapatan, penutupan, indeks ekologi, biomassa, dan karbon pada vegetasi lamun di Pantai Prawean, Jepara. Penelitian ini menggunakan metode pengambilan data secara purposive sampling. Pendataan kondisi padang lamun mengacu pada metode LIPI 2014 dengan mendata penutupan, dan kerapatan lamun. Pengambilan sampel lamun menggunakan seagrass core secara acak. Sampel lamun diolah dengan metode Loss On Ignition (LOI) untuk mengetahui kadar karbon. Selanjutnya data kadar karbon dikonversikan berdasarkan nilai biomassa lamun. Jenis lamun yang ditemukan di Pantai Prawean berjumlah 5 jenis antara lain Cymodocea rotundata, Thalassia hemprichiii, Oceana serrulata, Enhalus acoroides dan Halodule uninervis. Kerapatan lamun di Pantai Prawean dapat mencapai 1717 individu/m2 pada stasiun 1 dan 780 individu/m2pada stasiun 2. Persentase penutupan lamun total di Pantai Prawean sebesar 39,20 % pada stasiun 1 dan 22,73 % pada stasiun 2. Indeks ekologi pada stasiun 1 memiliki keanekaragaman rendah, keseragaman rendah dan ada dominasi lamun. Sedangkan pada stasiun 2 memiliki keanekaragaman sedang, keseragaman sedang dan dominasi sedang. Total biomassa lamun pada stasiun 1 dan stasiun 2 sebesar 2970,01 g/m2 dan 1345,85 g/m2. Total estimasi kandungan karbon lamun pada stasiun 1 dan stasiun 2 sebesar 1000,61 gC/m2 dan 447,27 gC/m2. Global climate change can cause an increase in carbon dioxide levels in the atmosphere. Seagrass can reduce carbon dioxide levels in the atmosphere by absorbing inorganic carbon through the seagrass photosynthesis process and storing it in the form of organic carbon for a long time. Therefore, this study was conducted to determine species composition, density, cover, ecological index, biomass, and carbon in seagrass vegetation in Prawean Beach, Jepara. This research uses purposive sampling data collection method. Data collection on the condition of seagrass beds refers to the 2014 LIPI method by recording the cover and density of seagrass. Seagrass sampling used random seagrass cores. Seagrass samples were processed by the Loss On Ignition (LOI) method to determine the carbon content. Furthermore, the carbon content data is converted based on the value of seagrass biomass. There are 5 types of seagrass found on Prawean Beach, namely Cymodocea rotundata, Thalassia hemprichiii, Oceana serrulata, Enhalus acoroides and Halodule uninervis. The density of seagrass in Prawean Beach can reach 1717 individuals/m2 at station 1 and 780 individuals/m2 at station 2. The percentage of total seagrass cover in Prawean Beach is 39.20% at station 1 and 22.73% at station 2. station 1 has l","PeriodicalId":50153,"journal":{"name":"Journal of Marine Research","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135924274","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}