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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
Earth & Planetary Sciences
The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management
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Articles 825 Documents
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Analisa Kesehatan Mangrove di Kawasan Ujung Piring dan Teluk Awur Menggunakan Sentinel-2A Abista Ahmad Romadoni; Raden Ario; Ibnu Pratikto
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35040

Abstract

Ekosistem mangrove merupakan ekosistem dengan komponen sumberdaya alam meliputi bentang alam, flora, fauna, dan masyarakat sekitar dengan beragam fungsi seperti ekologis, ekonomis dan sosial. Alih fungsi lahan mangrove untuk tambak dan pemukiman yang masif dilakukan mengakibatkan kondisi mangrove di Ujung Piring dan Teluk Awur mengalami penurunan kualitas ekosistem mangrove. Informasi spasial kondisi terkini ekosistem mangrove yang belum tersedia mengakibatkan upaya pencegahan kerusakan dan konservasi ekosistem mangrove tidak berjalan maksimal. Tujuan penelitian ini adalah mengetahui sebaran, luas, dan kondisi kesehatan mangrove di kawasan Ujung Piring dan Teluk Awur menggunakan citra Sentinel 2A melalui penginderaan jauh dan validasi lapangan. Pendekatan penginderaan jauh memadukan composite band dengan supervised classification dilakukan untuk mengetahui sebaran dan metode Normalized Difference Vegetation Index (NDVI) untuk mengetahui luas dan kondisi kesehatan mangrove. Validasi lapangan menerapkan hemispherical photography untuk menganalisa tutupan kanopi mangrove di lapangan. Hasil penelitian menunjukkan mangrove kawasan Ujung Piring tersebar di area pantai, ekowisata, dan tambak. Luas mangrove di kawasan Ujung Piring sebesar 21,004 ha terdiri dari 17,519 ha (83,41%) kategori lebat; 2,527 ha (12,03%) kategori sedang; dan 0,958 ha (4,56%) kategori jarang. Mangrove kawasan Teluk Awur dapat dijumpai di area pantai, daerah konservasi mangrove, tambak, aliran sungai, pemukiman, dan lahan terbuka. Mangrove di kawasan Teluk Awur memilki luas 10,657 ha tersusun oleh 8,013 ha (75,1% kategori lebat); 0,688 ha (6,5%) kategori sedang; dan 1,956 ha (18,4%) kategori jarang.  The mangrove ecosystem contains various natural resource components including landscapes, flora, fauna, and its surrounding communities with various ecological, economic, and social functions. Massive conversion of mangrove area for ponds and settlements has reduced the ecosystem quality of mangroves in Ujung Piring and Teluk Awur. The lack or even inexistence of spatial information regarding the current condition of the mangrove ecosystem has hindered the efforts to prevent damage and conserve mangrove ecosystem from running optimally. This research sought to examine the distribution, area, and health condition of mangroves in Ujung Piring and Teluk Awur areas using Sentinel-2A imagery by means of remote sensing and field validation. The remote sensing approach combined composite bands with supervised classification to determine the distribution and the Normalized Difference Vegetation Index (NDVI) method to determine the extent and health conditions of mangroves. The field validation applied hemispherical photography to analyze mangrove canopy cover in the field. The research results revealed that the mangroves in Ujung Piring area were distributed in coastal, ecotourism, and pond areas. The mangroves in Ujung Piring area measured 21.004 ha consisting of 17.519 ha (83.41%) in the dense category; 2,527 ha (12.03%) medium category; and 0.958 ha (4.56%) in sparse category. The mangroves in Teluk Awur area were found in coastal, mangrove conservation, pond, river, settlement, and open areas. The mangroves in Teluk Awur measured 10,657 ha consisting of 8,013 ha (75.1% dense category); 0.688 ha (6.5%) medium category; and 1,956 ha (18.4%) in sparse category.
Hubungan Lebar Karapas-Bobot Dan Parameter Lingkungan Kepiting Batu (Myomenippe hardwickii, Gray 1831) Di Perairan Dompak, Tanjungpinang, Kepulauan Riau Elvira Virgianty Nurqadri; Susiana Susiana; Wahyu Muzammil
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.33867

Abstract

Pola pertumbuhan kepiting batu (M. hardwickii) merupakan salah satu kajian yang belum pernah diteliti di Indonesia sehingga tidak adanya informasi terkait kepiting batu (Myomenippe hardwickii) di Perairan Dompak. Tujuan penelitian ini untuk mengetahui Hubungan lebar karapas-bobot, nisbah kelamin, dan parameter lingkungan kepiting batu (M. hardwickii) di Perairan Dompak, Tanjungpinang, Kepulauan Riau. Penelitian ini dilakukan selama tiga bulan yaitu bulan September, Oktober, dan November Tahun 2021. Pengambilan sampel kepiting batu dilakukan dua minggu sekali selama tiga (3) bulan. Jumlah sampel kepiting batu yang tertangkap oleh nelayan selama penelitian ini sebanyak 222 ekor, 83 jantan dan 139 betina. Hubungan lebar karapas kepiting batu jantan dan betina adalah allometrik negatif (pertumbuhan lebar karapas lebih besar dibandingkan pertumbuhan bobot). Nisbah kelamin dengan perhitungan uji Chi-Square kepiting batu jantan dan betina yaitu tidak seimbang. Parameter pendukung lingkungan habitat berada pada kondisi normal.    The growth pattern of stone crab (M. hardwickii) is one of the studies that has never been studied in Indonesia, so there is no information regarding rock crab (M. hardwickii) in Dompak Waters. The purpose of this study was to determine the relationship between carapace width and weight, sex ratio, and environmental parameters of rock crab (M. hardwickii) in Dompak waters, Tanjungpinang, Riau Islands. This research was conducted for three months, namely September, October, and November 2021. The research method used was the survey method, namely by direct observation at the research location. The sampling technique was carried out by census, namely stone crab samples obtained directly from the catch of fishermen. The fishing gear used was folding traps. Sampling of stone crabs was carried out every two weeks for three (3) months. The number of stone crab samples caught by fishermen during this study were 222 individuals, 83 males and 139 females. The relationship between the carapace width of male and female stone crabs was negative allometric (the growth of carapace width was greater than the growth of weight). The sex ratio with the Chi-Square test calculation of male and female rock crabs is not balanced. The supporting parameters of the habitat environment are in normal conditions 
Pengaruh Salinitas Terhadap Kandungan Lutein Spirulina platensis Donna Nur'Aurelya Mahardhika; Retno Hartati; Widianingsih Widianingsih
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.34176

Abstract

Spirulina platensis merupakan mikroalga yang mengandung protein tinggi. Mikroalga ini tidak hanya bertindak sebagai sumber protein sel tunggal, tetapi juga memberikan beberapa manfaat lainnya antara lain sumber karotenoid, klorofil, serta sumber mikronutrien. Salah satu kandungan karotenoid yaitu lutein. Lutein memiliki manfaat sebagai antioksidan untuk melawan radikal bebas pada mata. Pertumbuhan mikroalga dipengaruhi oleh beberapa macam faktor lingkungan, salah satunya yaitu salinitas. Penelitian ini bertujuan untuk mengetahui pengaruh salinitas terhadap kandungan lutein pada S. platensis. Metode yang digunakan ialah eksperimen laboratoris. Mikroalga S. platensis dikultivasi dengan tiga perlakuan salinitas yang berbeda yaitu 15, 23, dan 27ppt. Pertumbuhan sel S. platensis diamati selama 5 hari kemudian dipanen untuk perhitungan biomassanya. Biomassa basah hasil kultivasi diekstraksi menggunakan pelarut aseton. Ekstrak aseton S. platensis kemudian dianalisis kandungan luteinnya secara spektrofotometri. Hasil penelitian menunjukkan salinitas berbeda tidak memberikan pengaruh nyata terhadap kandungan lutein S. platensis. Kandungan pigmen lutein S. platensis yang tertinggi terdapat pada salinitas 23 ppt sebesar 0.0113 µg/g.  Spirulina platensis is a microalga that contains high protein. This microalga is not only acts as a single cell protein source, but also provides several other benefits, including a source of carotenoids, chlorophyll, and a source of micronutrients. One of the carotenoids contents is lutein. Lutein has benefits as an antioxidant to fight free radicals in the eyes. Microalgae growth is influenced by several kinds of environmental factors, one of which is salinity. This study aims to determine the effect of salinity on lutein content in S. platensis. The method used is a laboratory experiment. Microalgae S. platensis was cultivated with three different salinity treatments, namely 15, 23, and 27ppt. The growth of S. platensis cells was observed for 5 days and then harvested for biomass calculation. Wet biomass from cultivation was extracted using acetone as a solvent. The acetone extract of S. platensis was then analyzed for its lutein content spectrophotometrically. The results showed that different salinity didn’t have a significant effect on the S. platensis. The lutein content of S. platensis is highest at 23 ppt (0.0113 µg/g).
Optimasi Kinerja Instalasi Pengolahan Air Limbah Kawasan Pelabuhan Perikanan Samudera Nizam Zachman Jakarta Muhammad Aviv Arsya Irnantyanto; Subagiyo Subagiyo; Suryono Suryono
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35087

Abstract

Instalasi Pengolahan Air Limbah Pelabuhan Perikanan Samudera Nizam Zachman Jakarta mengolah air limbah industri yang dihasilkan dari kegiatan industri pengolahan ikan. Seiring berjalannya waktu, perkembangan industri pengolahan ikan semakin meningkat sehingga menambah beban pencemaran air limbah. Bertambahnya usia pada komponen pengolahan limbah dan semakin bertambahnya beban pencemaran air limbah maka perlu dilakukan evaluasi untuk mengetahui efisiensi kinerja proses pengolahan air limbah. Evaluasi dilakukan pada beban pencemaran inlet dan outlet air limbah serta kinerja proses pada unit pengolahan air limbah. Pengukuran dan pengujian dilakukan untuk memperoleh data yang selanjutnya akan dilakukan analisis data. Hasil analisis akan dibandingkan dengan standar desain unit pengolahan dan hasil pengujian air limbah akan dibandingkan dengan baku mutu pengolahan ikan yang berlaku. Hasil uji inlet air limbah menunjukkan tingginya kandungan beban pencemaran organik yang dihasilkan oleh industri pengolahan ikan. Kemampuan Instalasi Pengolahan Limbah UPT PPS Nizam Zachman Jakarta menunjukkan nilai efisiensi penurunan beban pencemaran organik, yaitu X>80%.  Nilai efisiensi penurunan beban pencemaran tersebut membuat parameter BOD, COD, TSS, Minyak dan Lemak tidak melebihi nilai baku mutu sehingga efisiensi penurunan beban pencemaran air limbah dinyatakan efektif, namun nilai efisiensi penurunan parameter amonia >80% masih melebihi nilai baku mutu, sehingga kinerja pengolahan air limbah dinyatakan tidak efektif dalam mengolah beban amonia pada air limbah. Wastewater Treatment Plant (WWTP) of Nizam Zachman Jakarta Fishing Port treats industrial wastewater produce from fish processing industry activities. Along the time, the development of the fish processing industry has increased that increasing the load of wastewater pollution. As the age of the waste treatment component increases and the load of wastewater pollution increases, it is necessary to evaluate the efficiency of the performance of the wastewater treatment process. Evaluation will be done on the influent and effluent pollution load of wastewater and process performance in the wastewater treatment unit. Measurement and examination conducted to obtain data for further data analysis. The results of the analysis will be compared with the WWTP design standards and the results of wastewater testing will be compared with the applicable fish processing quality standards. The results of the wastewater influent test show the high content of organic pollution loads produced by the fish processing industry. The penurunan efficiency of the wastewater treatment unit shows a very efficient level so that the results of the wastewater effluent test show a low pollution load value and are in accordance with the quality standard of Governor Regulation No. 69 of 2013 concerning Wastewater Quality Standards for Fish Processing Activities. Overall wastewater treatment performance shows a very efficient penurunan efficiency, however there are several activated sludge process parameters that are not in accordance with WWTP design standards and wastewater effluent parameters that exceed the quality standard values.
Estimasi Simpanan Karbon Sedimen Mangrove di Hutan Mangrove Kecamatan Ayah, Kabupaten Kebumen Meli Ayu Pangestika; Nirwani Soenardjo; Rini Pramesti
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.31965

Abstract

Ekosistem mangrove berfungsi penting bagi lingkungan salah satunya penyimpn karbon (C). Estimasi karbon vegetasi mangrove merupakan potensi magrove menyimpan karbon (stok karbon) dalam bentuk biomassa. penelitian ini bertujuan untuk mengestimasi simpanan karbon pada sedimen di hutan mangrove Kecamatan Ayah Kabupaten Kebumen. Penelitian dilakukan bulan Desember 2020. Stasiun penelitian dibagi menjadi 4 dan ditentukan berdasarkan kerapatan. Metode yang digunakan yaitu metode deskriptif. Penentuan lokasi penelitian dilakukan dengan metode pertimbangan atau purposive sampling. Sampel sedimen diambil berdasarkan plot sampling berukuran 10x10 meter dengan pipa modifikasi berdiameter 5 cm. Analisis data dilakukan menggunakan metode LOI (Los on Ignition). Nilai estimasi karbon sedimen penelitian ini adalah stasiun MA1 sebesar 7,70 ton/ha, stasiun MA2 sebesar 8,86 ton/ha, stasiun  MA3 sebesar 6,42 ton/ha dan stasiun MA4 sebesar 7,50 ton/ha. Hasil tertinggi pada stasiun MA2 kategori sedang dan hasil terrendah pada stasiun MA3 kategori rapat. Nilai karbon sedimen dipengaruhi kondisi lingkungan dan tekstur sedimen.   The mangrove ecosystem has an important function for the environment, one of which is carbon storage (C). Carbon estimation of mangrove vegetation is the potential for mangroves to store carbon (carbon stock) in the form of biomass. This study aims to estimate carbon storage in sediments in the mangrove forest of Ayah District, Kebumen Regency. The research was conducted in December 2020. The research stations were divided into 4 and determined based on density. The method used is descriptive method. Determination of the location of the research is done by the method of consideration or purposive sampling. Sediment samples were taken based on a sampling plot measuring 10x10 meters with a modified pipe with a diameter of 5 cm. Data analysis was performed using the LOI (Los on Ignition) method. The estimated value of sediment carbon in this study is MA1 station of 7.70 tons/ha, MA2 station of 8.86 tons/ha, MA3 station of 6.42 tons/ha and MA4 station of 7.50 tons/ha. The highest results were at the medium category MA2 station and the lowest results were at the dense category MA3 station. Sediment carbon value is influenced by environmental conditions and sediment texture.
Kandungan Logam (Pb) pada Air, Sedimen, dan Jaringan Lunak Kerang Darah (Anadara granosa) di Perairan Bandengan, Kabupaten Kendal Serta Batas Aman Konsumsi untuk Manusia Arya Fernandes; Adi Santoso; Ita Widowati
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35251

Abstract

Kegiatan pembangunan industri yang berkembang cukup pesat di kawasan industri Kabupaten Kendal diduga menjadi penyebab meningkatnya limbah buangan industri yang didalamnya terkandung logam berat timbal (Pb), sehingga limbah tersebut berkontribusi menurunkan kualitas perairan Bandengan, Kabupaten Kendal. Penelitian ini dilakukan dengan tujuan untuk mengetahui kadar logam (Pb) pada air, sedimen, dan kerang darah (A. granosa) serta batas maksimal konsumsi mingguan kerang darah (A. granosa) yang mengandung logam timbal (Pb) di Perairan Bandengan, Kabupaten Kendal. Penelitian ini dilaksanakan pada bulan Maret dan April 2022. Metode penelitian yang digunakan yaitu metode deksriptif sedangkan penentuan lokasi penelitian dengan metode purposive sampling. Analisis konsentrasi logam berat Pb dilakukan di Laboratorium Balai Besar Teknologi Pencegahan Pencemaran Industri (BBTPPI) dengan metode AAS (Atomic Absorption Spectrophotometry), sedangkan untuk analisis batas aman konsumsi mingguan dihitung dengan MTI (Maximum Tolerable Intake). Hasil penelitian ditemukan konsentrasi logam Pb di perairan Bandengan sebesar <0,003 mg/l, sedimen berkisar 15,32-24,21 mg/kg, dan kerang darah berkisar 0,209-0,731 mg/kg. Berat maksimal mengkonsumsi kerang darah (A. granosa) perminggu dari perairan Bandengan, Kabupaten Kendal individu dengan berat badan 60 kg sebesar 2,051-7,177 kg/minggu. Sedangkan, individu dengan berat 45 kg yaitu 1,538-5,382 kg/minggu. Industrial development activities have been developing quite rapidly in the Kendal Regency industrial area and are suspected to be the cause of the increase in the waste containing lead (Pb) heavy metal. It might contribute to reducing the quality of Bandengan waters. This study was to know the levels of metal (Pb) in water, sediment, and blood cockles (A. granosa) and the maximum weekly consumption of the cockles containing lead (Pb) in the waters. The study conducted in March and April 2022 used the descriptive method and purposive sampling to determine the locations. Analysis of Pb concentration was at the Laboratory of the Center for Industrial Pollution Prevention Technology (BBTPPI) using the AAS (Atomic Absorption Spectrophotometry) method. The analysis of the safe limit for weekly consumption was using the formula of MTI (Maximum Tolerable Intake). The results showed that Pb concentrations in water, sediment, and tissue in Bandengan waters were <0.003 mg/l, 15.32 - 24.21 mg/kg, and 0.209 - 0.731 mg/kg, respectively. The maximum weight of consuming blood cockles (A. granosa) per week from Bandengan waters, Kendal Regency of 60 kg individuals weighing was 2,051 - 7,177 kg/week. Meanwhile, individuals weighing 45 kg were 1,538 - 5.382 kg/week.
Analisis Kandungan Mikroplastik pada Sedimen di Perairan Semarang, Jawa Tengah Faisal Tegar Ibrahim; Jusup Suprijanto; Dwi Haryanti
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.36506

Abstract

Kota Semarang merupakan ibukota Provinsi Jawa Tengah serta menjadi pusat bisnis, ekonomi, pendidikan, dan berbagai kegiatan sosial. Hal ini menyebabkan kota ini memiliki produksi sampah yang besar. Sampah plastik, yang merupakan salah satu jenis sampah yang sering ditemukan dapat mengalami degradasi menjadi potongan plastik lebih kecil yang dinamakan mikroplastik. Perairan Semarang dipilih sebagai lokasi penelitian karena Kota Semarang merupakan daerah dengan aktivitas manusia yang tinggi dan menghasilkan banyak limbah plastik yang dapat mengendap dalam sedimen laut. Penelitian ini dilakukan untuk mengetahui pencemaran mikroplastik pada sedimen di Perairan Semarang. Pengambilan sampel dilakukan sebanyak 4 kali yaitu pada bulan April, Mei, Agustus, dan September 2021 secara purposive sampling menggunakan alat sediment grab di tiga titik berbeda yaitu muara, pantai, dan laut. Sedimen sebanyak 50 gram direndam dalam 100 ml larutan ZnCl2 selama 24 jam. Partikel mikroplastik yang mengambang dipisahkan kemudian direndam dalam 50 ml larutan H2O2 30% selama 24 jam dan disaring dengan menggunakan kertas saring MN (Macherey Nagel). Mikroplastik yang diperoleh diamati menggunakan mikroskop dan dianalisis bentuk, warna dan kelimpahannya. Hasil penelitian menunjukkan bahwa warna dan bentuk mikroplastik yang diperoleh yaitu, berdasarkan bentuknya antara lain fragmen, pelet, film, dan fiber, berdasarkan warnanya antara lain hitam, coklat, merah, kuning, putih, hijau, dan ungu. Kelimpahan mikroplastik pada Bulan April sebanyak 2.577 partikel/kg, Bulan Mei sebanyak 2.058 partikel/kg, Bulan Agustus sebanyak 1.858 partikel/kg, dan Bulan September sebanyak 2.011 partikel/kg. Semarang City is the capital city of Central Java Province as well as being the center of business, economy, education, and various social activities.  Plastic waste, which is one type of waste that is often found, can experience degradation into smaller pieces of plastic called microplastics. Semarang Waters were chosen as the research location because Semarang City is an area with high human activity and produces a lot of plastic waste which will later settle in marine sediments. This research was conducted to determine microplastic pollution in sediments in Semarang Waters. Sampling was carried out 4 times in April, May, August, and September 2021 by a purposive sampling using a sediment grab tool at three different points, namely the estuary, beach, and sea. From each sample 50 grams of sediment was immersed in 100 ml of ZnCl2 solution for 24 hours. The floating microplastic particles were separated and then immersed in 50 ml 30% H2O2 solution for 24 hours and filtered using MN (Macherey Nagel) filter paper. The obtained microplastics were observed using a microscope and analyzed for shape, color and abundance. The results showed that these are microplastics in the shape of fragments, pellets, films, and fibers, with the colors of black, brown, red, yellow, white, green, and purple. The abundance of microplastics in April was 2.577 particles kg-1, in May 2.058 particles kg-1, in August 1.858 particles kg-1, and in September 2.011 particles kg-1. 
Simpanan Karbon Lamun di Pulau Sintok dan Pulau Menjangan Besar, Karimunjawa Rico Adi Setyanto; Widianingsih Widianingsih; Wilis Ari Setyati
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.33980

Abstract

Blue carbon merupakan salah satu upaya penurunan efek pemanasan global melalui peran ekosistem penyerap karbon di pesisir. Kehadiran ekosistem lamun menjadi ekosistem penting pesisis dan penyerap karbon masif. Penelitian ini berutujuan untuk mengetahui kondisi lamun dan kandungan karbon pada vegetasi lamun di Pulau Sintok dan Pulau Menjangan Besar, Karimunjawa. Pengamatan ekosistem lamun menggunakan metode LIPI dengan transek kuadran 50x50cm. Sampling jaringan lamun dilakukan acak pada tiap lokasi dengan alat seagrasscore. Perhitungan kandngan karbon pada tiap jaringan lamun menggunakan metode pengabuan. Jenis lamun yang ditemukan pada Pulau Sintok terdapat 4 spesies sedangkan pada Pulau Menjangan Besar sebanyak 6 spesies. Pulau Sintok memiliki persen cover kategori sedang dan Pulau Menjangan Besar memiliki persen cover kategori padat. Nilai simpanan karbon pada Pulau Sintok berkisar antara 2,59–61,07 gC/m2 sedangkan pada Pulau Menjangan Besar berkisar antara 5,97–404,57 gC/m2. Nilai simpanan karbon terbesar pada Pulau Sintok dipegan spesies Thalassia hemprichii dan pada Pulau Menjangan Besar dipegang oleh spesies Enhalus acoroides. Kondisi ekosistem yang baik meningkatkan kemampuan ekosistem lamun dalam menyerap karbon dan dapat menjadi mitigasi pemanasan global.  Blue Carbon is one of the concepts to reduce the effects of global warming through the role of carbon-absorbing ecosystems on the coast. The presence of seagrass ecosystems is an important coastal ecosystem and a massive carbon sink. This study aims to determine the condition of seagrass and the carbon content of seagrass vegetation on Sintok Island and Menjangan Besar Island, Karimunjawa. Observation of seagrass ecosystem using LIPI method with 50x50cm quadrant transect. Seagrass tissue sampling was carried out randomly at each location using a seagrasscore tool. Calculation of carbon content in each seagrass tissue using Loss on Ignition (LOI method). There are 4 species of seagrass found on Sintok Island, while on Menjangan Besar Island there are 6 species. Sintok Island has a medium percent cover category and Menjangan Besar Island has a high percent cover category. The value of carbon storage on Sintok Island ranged from 2.59 – 61.07 gC/m2 while on Menjangan Besar Island it ranged from 5.97 – 404.57 gC/m2. In the Sintok Island, the largest value of carbon storage was Thalassia hemprichii and in the Menjangan Besar Island was held by Enhalus acoroides species. Good ecosystem conditions increase the ability of seagrass ecosystems to absorb carbon and mitigate global warming.
Profil Metabolit Ekstrak Etanol Enhalus acoroides (L.F.) Royle,1839 dari Nusa Tenggara Timur Mahmiah Mahmiah; Nor Sa’adah; Heronima Natalia Sunur; Nani Wijayanti
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35076

Abstract

Balauring, Nusa Tenggara Timur, merupakan salah satu wilayah yang berada di bagian Timur Indonesia yang terdapat banyak ekosistem lamun salah satu jenisnya adalah Enhalus acoroides. Pengembangan potensi lamun jenis ini oleh masyarakat masih kurang dimanfaatkan hanya sebagai sampah laut di perairan. Secara kemotaksonomi, daun tanaman lamun Enhalus acoroides mengandung senyawa bioaktif yang berpotensi untuk dijadikan alternatif pengobatan. Tujuan penelitian ini untuk mengidentifikasi kandungan senyawa bioaktif daun tanaman lamun Enhalus acoroides dari Balauring Nusa Tenggara Timur. Adapun metode ekstraksi maserasi dengan pelarut etanol 96%, parameter standardisasi non spesifik, skrining fitokimia, dan analisis FTIR (Fourier Transform InfraRed) dan GC/MS. Hasil penelitian menunjukkan Enhalus acoroides dari keluarga Hydrocharitaceae memiliki nilai kadar air, susut pengeringan dan kadar abu berturut-turut sebesar 6%, 12,9280% dan 14,7173%. Hasil identifikasi senyawa metabolit sekunder ekstrak etanol 96% Enhalus acoroides didapatkan gugus ikatan senyawa seperti gugus -OH atau -NH (ⱱ 3329.958 dan 3252.176 cm-1), -CH (ⱱ 2921.204 dan 2851.486 cm-1), -C=O (ⱱ 1641.169 cm-1), -C=C (ⱱ 1517.243 cm-1). Hasil GC/MS menunjukkan adanya 9 senyawa yang didominasi golongan alkaloid, flavonoid, terpenoid, dan polifenol.Balauring, East Nusa Tenggara, is one of the areas in eastern Indonesia with many seagrass ecosystems, one of which is Enhalus acoroides. The community's potential development of this type of seagrass is still underutilized, serving only as marine debris in the waters. According to chemotaxonomic analysis, the leaves of the seagrass plant Enhalus acoroides contain bioactive compounds that have the potential to be used as alternative treatments. Research objective: to identify the content of bioactive compounds in the leaves of the seagrass plant Enhalus acoroides from Balauring, East Nusa Tenggara. Methods: maceration extraction method with 96% ethanol solvent, non-specific standardization parameters, phytochemical screening, and FTIR (Fourier Transform InfraRed) and GC/MS analysis. Results: Enhalus acoroides, a member of the Hydrocharitaceae family, had moisture content, drying loss, and ash content values of 6%, 12.9280%, and 14.7173%, respectively. Secondary metabolites of Enhalus acoroides 96 percent ethanol extract were identified as-OH or-NH groups (3329,958 and 3252.176 cm-1),-CH (2921,204 and 2851,486 cm-1),-C=O (1641,169 cm-1), and-C=C (1517,243 cm-1). The GC/MS results revealed 9 compounds that were dominated by alkaloids, flavonoids, terpenoids, and polyphenols.
Struktur Dan Tutupan Kanopi Mangrove Di Kecamatan Genuk Semarang, Jawa Tengah Gagas Tri Pamungkas; Nirwani Soenardjo; Subagiyo Subagiyo
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.34372

Abstract

Mangrove merupakan komunitas tumbuhan tropis yang tumbuh di daerah pesisir dengan kemampuan adaptasi pada air bersalinitas tinggi dan dipengaruhi pasang surut. Besarnya potensi ekosistem mangrove diiringi dengan tekanan alam dan antropogenik yang besar, khususnya di Pantai Utara Jawa. Pemantauan dan inventarisasi struktur dan tutupan kanopi hutan mangrove secara komprehensif perlu dilakukan. Penelitian ini bertujuan untuk mengetahui struktur dan tutupan kanopi vegetasi mangrove di Kecamatan Genuk, Kota Semarang, Provinsi Jawa Tengah. Penentuan lokasi ditetapkan berdasarkan keberadaan jenis mangrove yang mewakili, yaitu jenis Rhizopora sp. dan Avicennia sp. Pengambilan data vegetasi dilakukan dengan metode purposive sampling dengan setiap stasiun dipasang plot berukuran 10 x 10 m. Hasil penelitian di Kecamatan Genuk ditemukan dua jenis mangrove, yaitu Rhizophora mucronata dan Avicennia marina. Jenis A. marina terdiri dari pohon, anak pohon dan semai dengan rata-rata kerapatan pada kategori pohon sebesar 1.633 ind/ha, sedangkan rata-rata kerapatan dengan jenis Rhizopora mucronata sebesar 1.400 ind/ha. A. marina dan R. mucronata masing-masing memiliki kerapatan relatif sebesar 77,2% dan 22,8%. Berdasarkan hasil perhitungan tersebut, tutupan kanopi menunjukkan ekosistem mangrove Kecamatan Genuk Kota Semarang memiliki tutupan sebesar 78-82,8 % tutupan ini masuk kategori tutupan yang padat (baik).   Mangroves are tropical plant communities that grow in coastal areas with the ability to adapt to salinity water that affects tides. The enormous potential of the mangrove ecosystem is accompanied by great natural and anthropogenic pressures, especially on the North Coast of Java. There is a need for a comprehensive monitoring and inventory of the structure and canopy cover of mangrove forests. This study aims to determine the structure and canopy cover of mangrove vegetation in Genuk District, Semarang City, Central Java Province. determination of the location based on the presence of representative mangrove species, namely Rhizopora sp. and Avicennia sp. Vegetation data was collected by purposive sampling method with each station installed a plot measuring 10 x 10 m. The results showed that in Genuk District, two types of mangroves were found, namely Rhizophora mucronata and Avicennia marina. A. marina species consisted of trees, saplings and seedlings with an average density of 1,633 ind/ha in the tree category, while the average density for Rhizopora mucronata was 1,400 ind/ha. A. marina and R. mucronata had relative densities of 77.2% and 22.8%, respectively. Based on these calculations, the canopy cover shows that the mangrove ecosystem in Genuk District, Semarang City has a cover of 78-82.8%, this cover is in the dense (good) cover category.

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