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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology METANA Journal of Marine Research Jurnal Harpodon Borneo International Journal of Marine and Aquatic Resource Conservation and Co-existence Jurnal Kelautan Tropis Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Indonesian Journal of Oceanography
Hadi Endrawati
Department Of Marine Science, Faculty Of Fisheries And Marine Science, Diponegoro University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Library & Information Science Other

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Analisis Konsentrasi Nitrat Dan Fosfat Terhadap Kelimpahan Fitoplankton Di Perairan Sengkarang Pekalongan Dzakwan, Ardhatama Zafron; Endrawati, Hadi; Ario, Raden
Journal of Marine Research Vol 12, No 4 (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.v12i4.35259

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 0.002-0.004 mg/L. Station 3 has a phosphate concentration that ranges from 0.002-0.004 mg/L. Phytoplankton abundance with the lowest yield at Station 1 of 561.5349 ind/L. Then the highest abundance results are at Station 2 of 2246.1394 ind/L and at Station 3 of 655.1240 ind / L. The presence of nitrate and phosphate in Sengkarang waters can be said to have no significant effect on phytoplankton because the correlation value (r) of 0.403 for nitrate and 0.271 for phosphate.
Kajian Kondisi Kesehatan Padang Lamun di Perairan Desa Wabula dan Desa Karya Jaya Kabupaten Buton Firil, Nis Aura Sadida; Endrawati, Hadi; Riniatsih, Ita
Journal of Marine Research Vol 13, No 3 (2024): 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.v13i3.42599

Abstract

Ekosistem lamun memiliki kontribusi dalam produktivitas perairan bagi keberlanjutan ekosistem perairan laut dangkal dan kelangsungan hidup biota laut di dalamnya. Penelitian ini bertujuan untuk mengetahui kondisi kesehatan ekosistem lamun yang terdapat di perairan Desa Wabula dan Desa Karya Jaya, Kabupaten Buton. Metode penelitian yang digunakan adalah metode line transect pada kedua lokasi dengan masing-masing terdapat dua stasiun pengambilan data. Hasil penelitian ditemukan total 5 jenis lamun yang terdapat pada kedua lokasi penelitian, yaitu; Cymodocea rotundata, Enhalus acoroides, Halophila ovalis, Halodule uninervis, dan Syringodium isoetifolium. Persentase rata-rata penutupan lamun di Desa Wabula adalah 56,11% dan di Desa Karya Jaya adalah 27,77%. Komposisi jenis lamun tertinggi pada kedua lokasi penelitian adalah spesies Cymodocea rotundata dengan rata-rata kerapatan 616,4 ind/m2 di Desa Wabula dan 446,4 ind/m2 di desa Karya Jaya. Status kesehatan ekosistem padang lamun yang terdapat di perairan Desa Wabula memiliki kategori baik dengan nilai indeks kesehatan ekosistem lamun sebesar 0,78 dan perairan Desa Karya Jaya memiliki kategori sedang dengan nilai indeks kesehatan ekosistem lamun sebesar 0,68. Parameter hidro-oseanografi di kedua lokasi penelitian dapat mendukung pertumbuhan ekosistem lamun karena sudah sesuai dengan Peraturan Pemerintah Nomor 22 Tahun 2021 perihal baku mutu perairan laut untuk ekosistem lamun.  Seagrass ecosystems contribute to aquatic productivity for the sustainability of shallow marine ecosystems and the survival of marine biota within them. This research aims to determine the health condition of the seagrass ecosystem in the waters of Wabula Village and Karya Jaya Village, Buton Regency. The research method used is the line transect method at both locations with two data collection stations each. The research results found a total of 5 types of seagrasses found in both research locations, namely, Cymodocea rotundata, Enhalus acoroides, Halophila ovalis, Halodule uninervis, and Syringodium isoetifolium. The average percentage of seagrass cover in Wabula Village is 56.11% and in Karya Jaya Village it is 27.77%. The highest composition of seagrass species at both research locations was the Cymodocea rotundata species with an average density of 616.4 ind/m2 in Wabula Village and 446.4 ind/m2 in Karya Jaya village. The health status of the seagrass ecosystem in the waters of Wabula Village is in the good category with a seagrass ecosystem health index value of 0.78 and the waters of Karya Jaya Village are in the medium category with a seagrass ecosystem health index value of 0.68. Hydro-oceanographic parameters at both research locations can support the growth of seagrass ecosystems because they are in accordance with Government Regulation Number 22 of 2021 concerning marine water quality standards for seagrass ecosystems.
Pengaruh Jenis Substrat Terhadap Pertumbuhan Semaian Biji Lamun (Enhalus acoroides) Chrismanola, Verena; Riniatsih, Ita; Endrawati, Hadi
Journal of Marine Research Vol 13, No 2 (2024): 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.v13i2.42610

Abstract

: Degradasi padang lamun telah terjadi di seluruh perairan dunia. Degradasi padang lamun dipengaruhi oleh tekanan lingkungan seperti perubahan iklim, penyakit parasite, dan gangguan kegiatan pesisir. Kombinasi dari tekanan lingkungan tersebut perlu dicegah dengan upaya restorasi dan rehabilitasi kawasan padang lamun. Salah satu upaya kegiatan restorasi lamun dapat dilakukan dengan metode pembenihan. Penelitian terkait restorasi padang lamun dengan pembenihan baik di lapangan maupun skala laboratorium masih sedikit dilakukan. Penelitian penyemaian biji ini dilakukan untuk mengetahui pengaruh tiga jenis substrat berbeda (pasir halus, pasir pecahan karang, dan lumpur berpasir) terhadap pertumbuhan lamun jenis Enhalus acoroides dalam skala laboratorium. Faktor pembatas dalam pertumbuhan lamun meliputi suhu, salinitas, oksigen terlarut, pH, dan kandungan nutrien dalam substrat sebagai parameter pendukung dalam penelitan ini. Pengumpulan biji lamun dilakukan di Pantai Mrican, Karimunjawa pada bulan Mei 2023 dan proses penyemaian biji dilakukan di Laboratorium Basah, FPIK, Universitas Diponegoro hingga bulan Agustus 2023. Penempatan wadah tanam dengan perlakuan tiga jenis substrat diletakkan di tiga akuarium berbeda secara acak yang telah terdapat sistem sirkulasi. Pengukuran data panjang daun, lebar daun, jumlah daun, serta parameter kualitas perairan dilakukan setiap dua minggu selama 12 minggu. Berdasarkan penelitian yang telah dilakukan, jenis substrat lumpur berpasir memberikan pengaruh tertinggi dalam pertumbuhan semaian biji lamun. Penelitian ini dapat disimpulkan bahwa perbedaan jenis substrat berpengaruh terhadap pertumbuhan semaian biji lamun.  Seagrass bed degradation is a global concern, impacted by environmental stressors like climate change, parasitic diseases, and coastal disruptions. Preventing these pressures requires dedicated efforts to restore and rehabilitate seagrass areas. Seeding emerges as a potential restoration method, yet research on seagrass restoration through seeding remains limited in both field and laboratory contexts. Consequently, this study focused on seed sowing to assess the influence of three substrates (sand, coral rubble sand, and sandy mud) on the laboratory-scale growth of Enhalus acoroides seagrass. Key growth-limiting factors, including temperature, salinity, dissolved oxygen, pH, and nutrient content in the substrate as supporting parametersin this research. Seagrass seeds were collected at Mrican Beach, Karimunjawa, in May 2023, and the sowing process occurred at the Wet Laboratory, FPIK, Diponegoro University, until August 2023.The placement of planting containers with the treatment of three types of substrates was palced in three different aquariums randomly which had a circulation system. Data measurements of leaf length, leaf width, number of leaves, and water quality parameter were carried out every two weeks for 12 weeks. Based on the research that has been done, type of sandy mud substrate gave the highest effect on the growth of seagrass seedlings. This research can be concluded that different types of substrates affect the growth of seagrass seedlings.
Distribusi Klorofil-a dan Suhu Permukaan Laut terhadap Kelimpahan Ikan Cephalopholis argus dan Cephalopholis miniata Di Pulau Pieh, Sumatera Barat Fauzan, Rianda; Widianingsih, Widianingsih; Endrawati, Hadi
Journal of Marine Research Vol 13, No 2 (2024): 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.v13i2.43988

Abstract

Kawasan Konservasi Perairan Pulau Pieh, Sumatera Barat memiliki produktivitas primer yang tinggi dan menandakan kesuburan perairan. Salah satu indicator kesuburan perairan adalah kandungan klorofil-a dan suhu permukaan laut. Tujuan penelitian ini untuk melihat hubungan kandungan klorofil-a dan suhu permukaan laut terhadap kelimpahan ikan Cephalopholis argus dan Cephalopholis miniata. Periode waktu yang digunakan adalah tahun 2019 – 2023. Data klorofil-a dan suhu permukaan laut diolah menggunakan perangkat lunak ArcGIS 10.8 dan hubungan antar variable dianalisis menggunakan analisis regresi linier berganda. Hasil menunjukkan bahwa hubungan Cephalopholis miniata dengan suhu permukaan laut linier dengan nilai signifikansi < 0,05 yaitu 0,044. Akan tetapi hubungan antar variable lainnya tidak signifikan secara statistik karena memiliki nilai > 0,05. The Pieh Island Marine Conservation Area, West Sumatra has high primary productivity and indicates the fertility of the waters. One of  indicators of water fertility is the chlorophyll-a content and sea surface temperature. The aim of this research is to investigate the relationship between chlorophyll-a content and sea surface temperature on fish abundance Cephalopholis argus and Cephalopholis miniate. The time period used is 2019 – 2023. Chlorophyll-a and sea surface temperature data were processed using ArcGIS 10.8 software and the relationship between variables was analyzed using multiple linear regression analysis. The results show that the relationship Cephalopholis miniate with linear sea surface temperature with a significance value <0.05, namely 0.044. However, the relationship between other variables is not statistically significant because it has a value > 0.05.
Analisis Kandungan Klorofil -a dan Kepadatan Diatom Thalassiosira sp. Dengan Penggunaan Konsentrasi Silikat yang Berbeda Cannavaro, Syahrial Varrel; Endrawati, Hadi; Setyati, Wilis Ari
Journal of Marine Research Vol 13, No 1 (2024): 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.v13i1.35303

Abstract

Thalassiosira sp. adalah diatom yang digunakan sebagai pakan alami bagi larva udang vanamei. Thalassiosira sp. mempunyai kandungan protein sekitar 44,5 %,karbohidrat 26,1% dan lemak 11,8% dari berat keringnya. Thalassiosira sp. adalah salah satu pakan alami yang baik karena mempunyai nilai nutrisi yang tinngi serta kandungan silika yang bagus untuk larva udang vanamei. Pertumbuhan diatom dibutuhkan media nutrisi dalam mendukung pertumbuhan plankton harus mengandung silika untuk mendukung pertumbuhan dan memperkuat cangkang sel. Penelitian ini bertujuan untuk mengetahui konsentrasi silikat yang tepat guna mengoptimalkan pertumbuhan kepadatan dan produksi pigmen klorofil pada Thalasiosira sp. Metode yang digunakan adalah eksperimen laboratorium dengan menggunakan Rancangan Acak Lengkap. Mikroalga Thalassiosira sp di kultivasi dengan lima taraf perlakuan konsentrasi silikat yang berbeda yaitu 0 ppm, 12 ppm,15 ppm, 18 ppm dan 21 ppm dengan tiga ulangan. Pertumbuhan Thalasiosira sp. diamati selama 13 x 24 jam kemudian dipanen untuk perhitungan biomassanya. Biomassa basah hasil kultivasi diekstraksi menggunakan pelarut aseton PA. Ekstrak aseton Thalassiosira sp. kemudian dianalisis kandungan pigmen klorofilnya dengan spektrofotometri. Hasil densitas tertinggi terdapat pada konsentrasi (15 ppm) Kandungan Klorofil Thalassiosira sp. tertinggi diproduksi pada konsentrasi (15 ppm) yaitu 184 µg/mL. Berdasarkan hasil penelitian dapat disimpulkan bahwa konsentrasi silikat berpengaruh secara signifikan terhadap kandungan klorofil Thalassiosira sp. Thalassiosira sp is a diatom that is used as natural food for vanamei shrimp larvae. Thalassiosira sp. It has a protein content of about 44.5%, carbohydrates 26.1% and fat 11.8% of its dry weight. Thalassiosira sp. is one of the good natural feeds because it has high nutritional value and good silica content for vanamei shrimp larvae. The growth of diatoms requires a nutrient medium to support the growth of plankton. It must contain silica to support growth and strengthen cell shells. This study aims to determine the appropriate concentration of silicate in order to optimize the growth of density and production of chlorophyll pigment in Thalasiosira sp. The method used is a laboratory experiment using a completely randomized design. The microalgae Thalasiosira sp was cultivated with five different levels of silicate concentration treatment, namely 0 ppm, 12 ppm, 15 ppm, 18 ppm and 21 ppm with three replications. Growth of Thalasiosira sp. observed for 13 x 24 hours and then harvested for biomass calculation. The wet biomass from the cultivation was extracted using acetone PA as a solvent. Thalasiosira sp. acetone extract. then analyzed the content of chlorophyll pigment by spectrophotometry. The highest density results were found at the concentration (15 ppm) of the Chlorophyll content of Thalassiosira sp. The highest was produced at a concentration (15 ppm) which was 184 g/mL. Based on the results of the study, it can be concluded that the salinity treatment had a significant effect on the chlorophyll content of Thalasiosira sp. 
Analisis Kesesuaian dan Daya Dukung Ekowisata Kawasan Mangrove Baros, Bantul, Yogyakarta Anandita, Assifa Yusan; Redjeki, Sri; Endrawati, Hadi
Journal of Marine Research Vol 13, No 2 (2024): 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.v13i2.40544

Abstract

Kawasan ekowisata menjadi salah satu destinasi wisata yang banyak dikunjungi oleh wisatawan karena pemandangan alam dan suasananya. Mangrove Baros, Bantul, Yogyakarta menjadi salah satu kawasan ekowisata yang mulai dikembangkan tahun 2022 dan banyak dikunjungi hingga ratusan pengunjung setiap harinya. Kondisi hutan mangrove perlu diperhatikan dalam pelaksanaan ekowisata sehingga diperlukan perhitungan Indeks Kesesuaian Wisata serta Daya Dukung Kawasan untuk memberikan informasi terkait kondisi di kawasan ekowisata tersebut. Tujuan penelitian yaitu untuk mengetahui nilai Indeks Kesesuaian Wisata (IKW), menghitung Daya Dukung Kawasan (DDK) yang menampilkan jumlah wisatawan yang dapat ditampung pada kawasan ekowisata. Metode yang digunakan dalam penelitian yaitu kualitatif deskriptif dengan melakukan peninjauan langsung ke kawasan mangrove. Penelitian dilakukan pada 5 stasiun dengan parameter yang diambil yaitu ketebalan mangrove, kerapatan mangrove, jenis mangrove, objek biota dan pasang surut serta data sekunder berupa wawancara dan kuisioner. Nilai IKW yang didapatkan dengan presentase tertinggi yaitu stasiun 5 sebesar 64,1% dan presentase terendah pada stasiun 4 sebesar 41% Stasiun 1, 2, 3 dan 4 masuk ke dalam kategori tidak sesuai dan hanya stasiun 5 yang masuk ke dalam kategori sesuai. Hasil perhitungan DDK didapatkan sebesar 282 orang/hari dengan melakukan kegiatan seperti wisata mangrove, memancing dan rekreasi. Rehabilitasi mangrove perlu dilakukan untuk meningkatkan nilai IKW karena ketebalan mangrove dalam kategori kurang karena faktor utama yang setiap tahunnya mengancam kawasan mangrove yaitu banjir rob.Ecotourism area is one of the most visited tourist destinations by tourists because of its natural scenery and atmosphere. Baros Mangrove, Bantul, Yogyakarta is one of the ecotourism areas which will begin to be developed in 2022 and is visited by hundreds of visitors every day. The condition of mangrove forests needs to be considered in the implementation of ecotourism so that it is necessary to calculate the Tourism Suitability Index and Area Supporting Capacity to provide information regarding conditions in the ecotourism area. The research objective is to determine the value of the Tourism Suitability Index (TSI), calculate the Regional Support Capacity (CC) which displays the number of tourists that can be accommodated in ecotourism areas. The method used in this research is descriptive qualitative by observing the mangrove forest directly. The research was conducted at 5 stations with parameters taken, namely mangrove thickness, mangrove density, mangrove species, biota and tidal objects as well as secondary data in the form of interviews and questionnaires. The TSI value obtained with the highest percentage is station 5 of 64.1% and the lowest percentage is at station 4 of 41% Stations 1, 2, 3 and 4 categorized as an inappropriate category and only station 5 categorized as the appropriate category. The CC calculation results obtained were 282 people/day by carrying out activities such as mangrove tours, fishing and recreation. Mangrove rehabilitation needs to be done to increase the TSI value because the thickness of the mangroves is in the less category because the main factor that threatens the mangrove area every year is tidal flooding.
Konsentrasi Nitrat dan Fosfat dan Kandungan Klorofil Thalassia Hemprichii di Perairan Pulau Kemujan dan Perairan Teluk Awur Kirana, Nadia Astrid; Endrawati, Hadi; Nuraini, Ria Azizah Tri
Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i3.48042

Abstract

Ekosistem lamun memiliki produktivitas primer yang tinggi sehingga dapat mendukung kelimpahan ikan dan invertebrata serta turut menjaga kelestariannya. Nutrien berupa nitrat dan fosfat merupakan makro nutrien yang sangat penting bagi proses pertumbuhan dan perkembangan lamun. Pembentukan klorofil lamun dapat dipengaruhi oleh nutrien berupa nitrat dan fosfat. Penelitian ini bertujuan untuk mengetahui konsentrasi nutrien nitrat dan fosfat pada air dan sedimen serta kandungan klorofil lamun Thalassia Hemprichii di perairan Teluk Awur dan Pulau Kemujan. Sampel daun lamun T. Hemprichii diambil dari perairan Teluk Awur dan perairan Pulau Kemujan bersamaan dengan sampel air dan sedimen perairan. Sampel daun lamun T. Hemprichii dalam keadaan basah digerus kemudian ditimbang sebanyak 100 mg. Sampel dilarutkan menggunakan 10 ml Aseton 90%. Dilakukan sentrifuge dengan kecepatan 1000 rpm selama 5 menit lalu hasil supernatannya dipindahkan ke dalam botol vial. Analisis klorofil menggunakan spektrofotometer UV-Vis. Hasil yang telah didapatkan menunjukkan bahwa pada lokasi yang berbeda terdapat perbedaan kandungan klorofil. Kandungan klorofil di perairan Pulau Kemujan lebih tinggi apabila dibandingan dengan perairan Teluk Awur. Hasil konsentrasi nitrat dan fosfat perairan dan sedimen ditemukan cenderung memiliki nilai yang lebih baik di lokasi perairan Teluk Awur apabila dibandingkan dengan perairan Pulau Kemujan.  Seagrass ecosystems have very high primary productivity so that they can support the abundance and diversity of fish and invertebrates and contribute to their sustainability. Nutrients in the form of nitrate and phosphate are macronutrients that are very important for the growth and development of seagrass ecosystems. The formation of chlorophyll in seagrass leaves can be influenced by nutrients in the form of nitrate and phosphate. This study aims to determine the consentration of nitrate and phosphate nutrients in water and sediment and the chlorophyll content of seagrass T. Hemprichii in the waters of Teluk Awur and Kemujan Island. Seagrass leaf samples of T. Hemprichii were taken from the waters of Teluk Awur and the waters of Kemujan Island along with samples of water and water sediments. Samples of T. Hemprichii seagrass leaves were ground wet and then weighed as much as 100 mg. The sample was dissolved using 10 ml of 90% Acetone. Centrifuge at 1000 rpm for 5 minutes. Then the supernatant was transferred to a vial. Chlorophyll analysis using UV-Vis spectrophotometer. The results that have been obtained indicate that at different locations there are differences in chlorophyll content. The chlorophyll content in the waters of Kemujan Island is higher when compared to the waters of Teluk Awur. The results of nitrate and phosphate concentrations in waters and sediments were found to have a better value in the waters of Teluk Awur when compared to the waters of Kemujan Island.
Distribution Pattern of Chlorophyll-a in the Delta Wulan Waters, Demak Regency, Central Java, Indonesia Widianingsih, Widianingsih; Hartati, Retno; Endrawati, Hadi
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.21827

Abstract

The Delta Wulan waters are categorized as estuarine waters, which are greatly influenced by the sedimentation from the Wulan River and Serang River. Besides, the Delta Wulan Waters are vulnerable to the impact of pollution from anthropogenic waste. This research aims to examine the distribution pattern of chlorophyll-a and water quality parameters in the Delta Wulan Waters. Samplings were carried out at 12 stations, which were located in the middle of the Delta Wulan waters. One liter of water samples was taken using a Niskin bottle. The water quality measurements were carried out in situ. The research revealed that the highest chlorophyll-a value was found at Station 11 (2.94 ug/L) in November 2023, and the lowest chlorophyll-a value was also found in November 2023 at Station 6 (0.01 ug/L). Meanwhile, in August 2023, the chlorophyll-a value was in the range of 0.53–8.02 µg/L. The observations in August and November showed that the distribution pattern of chlorophyll-a was regular for stations 1 to 12 (dispersion index value < 1)
Indeks Ekologi Komunitas Tintinnid (Protozoa:Ciliophora) di Perairan Banggai, Sulawesi Tengah Sugiyanto, Nenden Rose; Widianingsih, Widianingsih; Suryono, Chrisna Adhi; Hartati, Retno; Endrawati, Hadi
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24783

Abstract

There are several groups of organisms in zooplankton, including ciliates (Filum Ciliophora). Ciliates that live in the sea belong to the suborder tintininna or also often referred to as tintinnids. This study aims to determine the type and abundance and analyze the ecological index of the tintinnid community in Banggai Waters, Central Sulawesi. This research was conducted at 35 stations on 1 – 14 September 2022 in the Banggai Waters, Central Sulawesi. The samples were taken by vertical method. The results showed that 9 families, 20 genera, and 35 tintinnid species were identified. The abundance of tintinnids in Banggai Waters has an average of 5763 cells/m3. Furthermore, the distribution pattern of total abundance at each station shows a clustered distribution pattern. The diversity of tintinnid abundance in Banggai Waters has an average of 2.15, classified as moderate. Tintinnid uniformity in Banggai Waters has an average of 0.63 classified as high. The dominance of tintinnids in Banggai Waters has an average of 0.17 classified as low category. The relationship between total abundance and diversity index shows a positive correlation. Meanwhile, the relationship between the abundance and evenness indices and the dominance indices shows a negative correlation.  The study's results suggest that the condition of the tintinnid community in Banggai Waters is stable. Filum Ciliophora (Ciliata) termasuk dalam kelompok mikrozooplankton.  Ciliata yang hidup di laut termasuk ke dalam subordo Tintininna atau juga sering disebut dengan tintinnid. Penelitian ini bertujuan untuk mengetahui jenis, kelimpahan, dan indeks ekologi dari komunitas tintinnid yang berada di Perairan Banggai, Sulawesi Tengah. Pengambilan sampel dilakukan pada tanggal 1- 14 September  2022 di Perairan Sulawesi Tengah. Sampel  mikrozooplankton diambil secara vertikal pada 35 stasiun.  Hasil penelitian menunjukkan bahwa ditemukan 9 famili, 20 genus, dan 35 spesies tintinnid yang teridentifikasi. Kelimpahan tintinnid di Perairan Banggai memiliki rata-rata sebesar 5763 sel/m3. Selanjutnya pola sebaran dari kelimpahan total di tiap stasiun menunjukkan pola sebaran mengelompok.  Kenekaragaman Kelimpahan tintinnid di Perairan Banggai memiliki rata-rata sebesar 2,15 tergolong kategori sedang.  Keseragaman tintinnid di Perairan Banggai memiliki rata-rata sebesar 0,63 tergolong kategori tinggi. .  Dominansi tintinnid di Perairan Banggai memiliki rata-rata sebesar 0,17 tergolong kategori rendah. Hubungan anatara kelimpahan total dengan indek keanekaragaman menjukkan korelasi positif. Sedangkan hunbungan antrara kelimpahan dengan indek keseragman dan  indek dominansi menjukkan adanya korelasi negatif. Berdasarkan hasil penelitian dapat disimpulkan bahwa kondisi komunitas tintinnid di Perairan Banggai termasuk stabil.
Determination of chlorophyll-a and its distribution in the waters of the mangrove forest rehabilitation area in Mojo Estuaria, Pemalang Maharani, Galung Dhiva; Indarjo, Agus; Hadibarata, Tony; Zainuri, Muhammad; Endrawati, Hadi; Redjeki, Sri; Pribadi, Rudhi; Rochaddi, Baskoro; Ismanto, Aris; Jihadi, Muhammad Shulhan
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.23253

Abstract

Pemalang Regency has a mangrove area of around 2,839.44 but has been damaged reaching 453.38 Ha or about 16% of the existing area. This causes ecological functions in resisting abrasion, erosion, sedimentation, and carbon capture to decrease. Government efforts to restore the function of mangroves on the North Coast of Central Java carried out by rehabilitation require input from a water productivity approach. This study aims to determine the content and distribution of chlorophyll-a found in Pemalang Waters, Central Java. This was done by in situ observations in Pemalang Waters to see the fertility level of the waters, by purposive sampling at 20 sampling site, on April 30, 2024. The results obtained will be interpolated with ex situ data, including the Indonesian Earth Map (RBI), tidal data obtained from the SRGI website, flow data obtained from the Batnas website, and wind data obtained from the BMKG website. The next geospatial approach is ODV 4, Ms.Excel, and WR Plot application mapping; current analysis will be performed using ArcGIS 10.8 and Mike 21 applications; while the tidal analysis is carried out by the Admiralty method. The results of research conducted in Mojo Waters, Pemalang showed that the range of chlorophyll-a values was in the range of 1,858 - 41,287 mg / m3. The results were analyzed in sampling areas including rivers, estuaries, lagoons, eastern drift currents, western drift currents, waters still affected by estuaries, and the high seas. The distribution of chlorophyll values in these waters is the impact of nutrient supply from land because it is closely related to human activities, freshwater and seawater resuspension, drift currents, breaking waves, tidal currents. This causes the distribution pattern to occur from northeast to southwest.
Co-Authors AB Susanto Abdino Putra Utama Adi Santoso Agus Indarjo Agus Sabdono Agus Subagio Aini, Firly Nur Altysia Putriany Ambariyanto Ambariyanto Anandita, Assifa Yusan Anantya Setya Perdana Andreas Nur Hidayat Anindya Wirasatriya Annisa Fadillah Antik Erlina Antonius Budi Susanto Ardita Elok Mahendra Putri Ardyatma, Via Jeanieta Berliana Argina Dewi S Aris Ismanto Arrosyd, Muhammad Azam Azhari Nourma Dewi Azis Rifai Azizi, Muhammad Faris Baidhowie, Lutfil Hakim Baskoro Rochaddi Bifa Aulia Manuhuwa Budhy Wiyarsih Cannavaro, Syahrial Varrel Cantik Sitta Devayani Cantika Elistyowati Andanar Chandra Nicolas Sihaloho Chrismanola, Verena Chrisna Adhi Suryono Christian Jimmy Christin Manulang Cristiana Manullang Cristiana Manullang Delianis Pringgenies Desy Lasri Ana Dewi Nugrayani Dinda Monita Dwi Saniscara Wati Dyahruri Sanjayasari Dzakwan, Ardhatama Zafron Endang Kusdiyantini Endang Supriyantini Evi Lutfiyani Fadhel Muhammad Juharna Fauzan, Rianda Febrianto, Sigit Febriyantoro Febriyantoro Firil, Nis Aura Sadida Frijona Fabiola Lokollo Gentur Handoyo Gunawan Widi Santosa Handhikka Daffa Wira Pradhana Hermin P Kusumaningrum Hermin Pancasakti Kusumaningrum Heryoso Setiyono Hilal M Hilyati Fajrina Ibnu Pratikto Ida Noventalia Ida Noventalia Imam Misbach Indras Marhaendrajaya Ira Kolaya, Ira Irwani Irwani Irwanto, Eko Ita Riniatsih Ita Widowati Ivan Riza Maulana Jihadi, Muhammad Shulhan Julia Fransiska Ken Suwartimah Kiki Pebli Ningrum Kirana, Nadia Astrid Lilik Maslukah Lutfil Hakim Baidhowie M. Amanun Tharieq Maharani, Galung Dhiva Manuhuwa, Bifa Aulia Maulana Cahya Widhiatmoko Monita, Dinda Muhamad Ravian Wiraputra Muhammad Iskandar Zulkarnain Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Mumtaz, Fathiyah Ningrum, Kiki Pebli Nirwani Soenardjo Nor, Muhammad Muallifin Nugrayani, Dewi Nugroho Agus D Nur Taufiq Nur Taufiq Nur Taufiq SPJ Nur Taufiq-Spj Nurul Latifah Octo Zainul Ahmad Perdana, Anantya Setya Pradhana, Handhikka Daffa Wira Primaswatantri Permata Putri Sakinah Mayani, Putri Sakinah Putri, Ardita Elok Mahendra Raden Ario Raka Pramulo Sophianto Rana Hadi Shafani Ranny Ramadhani Yuneni Retno Hartati Ria Azizah Ria Azizah Ria Azizah Ria Azizah Tri Nuraini Robertus Triaji Mahendrajaya Robertus Triaji Mahendrajaya Rodhiyah Patmawati Rose Dewi Rose Dewi Rose Dewi Rudhi Pribadi Sihaloho, Chandra Nicolas Sophianto, Raka Pramulo Sri Amini Sri Redjeki Sri Redjeki Sri Sedjati Sri Sedjati Sugeng Widada Sugiyanto, Nenden Rose Sunaryo Sunaryo Sunaryo Sunaryo Suryani, Oda Gracia Ariela Suryanti - Suryono Suryono Susilo Dwi Cahyanti, Susilo Dwi Sutrisno Anggoro Taufiq-Spj, Nur Theresia Claudia Lasmarito Tiara Finishia, Tiara Titik Mariyati Tjahjo Winanto Tony Hadibarata, Tony Utama, Abdino Putra Valentina R Iriani Via Jeanieta Berliana Ardyatma W.L. Saputra Widhiatmoko, Maulana Cahya Widianingsih Widianingsih Widianingsih Widianingsih Widya Paramudhita Wilis Ari Setyati Wiraputra, Muhamad Ravian Yopie Anggara Putra, Yopie Anggara Yuniar Andri Sulistiyanto Yuniar Andri Sulistiyanto Yuvita Muliastuti