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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Ilmu Kelautan Spermonde Jurnal Kelautan Tropis OLDI (Oseanologi dan Limnologi di Indonesia) Marine Research in Indonesia Makara Journal of Science
Muhammad Reza Cordova, Muhammad Reza
Departemen Ilmu dan Teknologi Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor
Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Skrining Kemampuan Absorpsi Merkuri pada Makroalga Cokelat Hormophysa triquetra dan Makroalga Merah Gracilaria salicornia dari Pulau Pari Cordova, Muhammad Reza; Muhtadi, Ahmad
Oseanologi dan Limnologi di Indonesia Vol 2, No 3 (2017)
Publisher : Oseanologi dan Limnologi di Indonesia

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Abstract

Makroalga atau rumput laut memiliki daya serap yang baik terhadap semua zat yang ada di lingkungan perairan, termasuk logam berat merkuri (Hg). Tujuan penelitian ini adalah untuk mengetahui kandungan merkuri dalam makroalga cokelat Hormophysa triquetra dan makroalga merah Gracilaria salicornia serta pada sedimen, sehingga dapat diketahui potensi kedua jenis makroalga tersebut sebagai bioakumulator merkuri. Sampel makroalga dan sedimen diambil dari kawasan utara, timur, selatan, dan barat Pulau Pari, Kepulauan Seribu pada bulan April 2016, dianalisis dengan Mercury Analyzer NIC MA-3000. Hasil penelitian ini menunjukkan bahwa kandungan merkuri dalam makroalga merah lebih tinggi daripada makroalga cokelat. Kandungan merkuri dalam makroalga dari perairan Pulau Pari berada pada kisaran 21,50 ± 9,59 µg/kg (makroalga cokelat) dan 41,45 ± 14,00 µg/kg (makroalga merah).  Kompleksitas gugus fungsi membuat kandungan merkuri lebih tinggi dalam makroalga merah dibandingkan dalam makroalga cokelat. Kemampuan akumulasi merkuri membuat kedua spesies makroalga berpotensi untuk menjadi bioakumulator
Kandungan Merkuri dalam Ikan Konsumsi di Wilayah Bantul dan Yogyakarta Suratno, Suratno; Cordova, Muhammad Reza; Arinda, Silke
Oseanologi dan Limnologi di Indonesia Vol 2, No 1 (2017)
Publisher : Oseanologi dan Limnologi di Indonesia

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Abstract

Ikan merupakan salah satu sumber energi yang penting bagi tubuh dan memiliki banyak fungsi bagi kesehatan, sehingga banyak dikonsumsi oleh masyarakat. Namun, ikan memiliki kemampuan mengakumulasi logam berat. Salah satu jenis logam berat yang berbahaya dan dapat terakumulasi dalam tubuh ikan adalah merkuri karena memiliki toksisitas tinggi pada konsentrasi rendah. Adanya pencemar dari kegiatan antropogenik yang tidak diolah terlebih dahulu membuat ikan berpotensi mengakumulasi logam berat. Penelitian ini mengkaji konsentrasi merkuri dalam ikan air tawar dan ikan air laut yang dikonsumsi oleh masyarakat Bantul dan Yogyakarta. Sampel ikan dikumpulkan pada 29–30 Agustus 2015 dari Pasar Prawirotaman, Supermarket, Tambak di Sungai Code, dan dibeli dari nelayan yang ada di Pantai Depok. Analisis konsentrasi merkuri dalam ikan dilakukan menggunakan mercury analyzer NIC MA-3000. Hasil penelitian ini menunjukkan bahwa ikan dengan kebiasaan makan bentivora dan planktivora mengakumulasi merkuri lebih tinggi dibandingkan ikan omninora dan karnivora. Konsentrasi merkuri dalam ikan yang diteliti tidak melebihi standar ambang batas dari WHO, BPOM-RI, dan Standar Uni Eropa yang ditetapkan. Namun, hal ini perlu diwaspadai karena sifat merkuri yang bioakumulatif, terutama bila ikan yang dikonsumsi mengakumulasi merkuri secara terus-menerus dalam waktu yang lama.
ASSESSING CONTAMINATION LEVEL OF JAKARTA BAY NEARSHORE SEDIMENTS USING GREEN MUSSEL (PERNA VIRIDIS) LARVAE Cordova, Muhammad Reza; Purbonegoro, Triyoni; Puspitasari, Rachma; Hindarti, Dwi
Marine Research in Indonesia Vol 41, No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.301 KB) | DOI: 10.14203/mri.v41i2.130

Abstract

Indication of accumulation of heavy metal in sediments will lead to problem for shore and sea ecosystems, biota living in that area and human’s health. The research is aiming to analyse the toxicity of sediment from thirty one locations in Jakarta Bay using Perna Viridis. High amount in larval abnormality found in sediments from the area near mainland and estuary are an indication of high influence of waste from anthropogenic activities from Jakarta mainland. These areas are down stream of Cengkareng Drain, Kamal River, Grogol River and Cakung River, area around sea transportation and North Jakarta Integrated Industrial Area. Sediment of Jakarta Bay, especially coming from estuary area and near to the land area causes an increase in green mussel larval abnormality. This indicates the high of waste influence from anthropogenic activity from Jakarta land area.
MICROPLASTIC IN THE DEEP-SEA SEDIMENT OF SOUTHWESTERN SUMATRAN WATERS Cordova, Muhammad Reza; Wahyudi, Aan J.
Marine Research in Indonesia Vol 41, No 1 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.013 KB) | DOI: 10.14203/mri.v41i1.99

Abstract

Indonesia was recently ranked second on the list of countries producing plastic waste. Plastic can be degraded by thermal oxidation either with ultraviolet radiation and by mechanical to a very small size the size will be smaller. Degraded plastic with small sizes (<5 mm) measured has been micrometers known as microplastic. We took sediment samples on 07-18 May 2015 in EWIN 2015 cruise, which part of the contribution of Indonesian researchers for the International Indian Ocean Expedition-2 program, at 66.8 to 2182 m below sea level. Microplastic analysis from the sediment was carried out by using flotation methods. We found microplastic in 8 locations out of 10 sampling locations. We found 41 particles microplastic with a form of granules (35 particles) and fibers (6 particles). Most of microplastic particles were found at depths less than 500 m with 20 particles. The discovery of microplastic in the sediment from the sea of western Sumatra at a depth more than 2000 m, indicated that plastic, considered new developed materials (early nineteen centuries made), has invaded marine areas, including pristine areas. It confirms the statement that plastic waste has spread widely to different areas of the seas and oceans, including remote and mostly unknown areas such as the deep sea.
BEACH DEBRIS ON LABUANGE BEACH, BARRU DISTRICT, SOUTH SULAWESI PROVINCE, INDONESIA Isyrini, Rantih; Tambaru, Rahmadi; La Nafie, Yayu A.; Ukkas, Marzuki; Cordova, Muhammad Reza
Jurnal Ilmu Kelautan SPERMONDE Vol 4, No 2 (2018)
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v4i2.7066

Abstract

To support the efforts of the Indonesian government in managing marine debris that has a broad potential negative impact in various aspects, beach debris monitoring activities are urgently required in various locations. This research was carried out from June to August 2018 in the west coast region, on Labuange beach, Barru Regency, South Sulawesi Province, Indonesia, which was exposed by the Indonesian Through-Flow. The study aimed to determine the amount, weight and composition of marine debris on Labuange beach.  Marine debris was sampled from a permanent line transect with an area of 150 m2 (three replications). Samples were then cleaned, sorted, counted, and weighed. The average amount of marine debris was 5.98 + 2.13 items/m2 per month, with a total weight was 138.69 ± 91.32 g/m2 per month. Plastic and rubber category dominated every sampling period in the location. The abundance of marine debris, both regarding quantity and weight, fluctuated in high amount during the sampling period, which indicated the magnitude of the role of oceanographic factors, including the direction of waves, and lack of community awareness on marine debris impacts and management. The great amount and weight of marine debris and the type of waste, which was dominated by plastic and rubber is a potential threat to humans, marine biota, and the local or global environment.
MICROPLASTIC IN THE DEEP-SEA SEDIMENT OF SOUTHWESTERN SUMATRAN WATERS Cordova, Muhammad Reza; Wahyudi, A'an J.
Marine Research in Indonesia Vol 41 No 1 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.013 KB) | DOI: 10.14203/mri.v41i1.99

Abstract

Indonesia was recently ranked second on the list of countries producing plastic waste. Plastic can be degraded by thermal oxidation either with ultraviolet radiation and by mechanical to a very small size the size will be smaller. Degraded plastic with small sizes (&lt;5 mm) measured has been micrometers known as microplastic. We took sediment samples on 07-18 May 2015 in EWIN 2015 cruise, which part of the contribution of Indonesian researchers for the International Indian Ocean Expedition-2 program, at 66.8 to 2182 m below sea level. Microplastic analysis from the sediment was carried out by using flotation methods. We found microplastic in 8 locations out of 10 sampling locations. We found 41 particles microplastic with a form of granules (35 particles) and fibers (6 particles). Most of microplastic particles were found at depths less than 500 m with 20 particles. The discovery of microplastic in the sediment from the sea of western Sumatra at a depth more than 2000 m, indicated that plastic, considered new developed materials (early nineteen centuries made), has invaded marine areas, including pristine areas. It confirms the statement that plastic waste has spread widely to different areas of the seas and oceans, including remote and mostly unknown areas such as the deep sea.
ASSESSING CONTAMINATION LEVEL OF JAKARTA BAY NEARSHORE SEDIMENTS USING GREEN MUSSEL (PERNA VIRIDIS) LARVAE Cordova, Muhammad Reza; Purbonegoro, Triyoni; Puspitasari, Rachma; Hindarti, Dwi
Marine Research in Indonesia Vol 41 No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.301 KB) | DOI: 10.14203/mri.v41i2.130

Abstract

Indication of accumulation of heavy metal in sediments will lead to problem for shore and sea ecosystems, biota living in that area and human?s health. The research is aiming to analyse the toxicity of sediment from thirty one locations in Jakarta Bay using Perna Viridis. High amount in larval abnormality found in sediments from the area near mainland and estuary are an indication of high influence of waste from anthropogenic activities from Jakarta mainland. These areas are down stream of Cengkareng Drain, Kamal River, Grogol River and Cakung River, area around sea transportation and North Jakarta Integrated Industrial Area. Sediment of Jakarta Bay, especially coming from estuary area and near to the land area causes an increase in green mussel larval abnormality. This indicates the high of waste influence from anthropogenic activity from Jakarta land area.
Study of Heavy Metal Distribution and Hydrodynamic Simulation in Green Mussel Culture Net, Cilincing Water-Jakarta Bay Koropitan, Alan Frendy; Cordova, Muhammad Reza
Makara Journal of Science Vol. 21, No. 2
Publisher : UI Scholars Hub

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Abstract

This study aimed to investigate the heavy metals distribution inthesurrounding area of green mussel culture net,Cilincing water, Jakarta Bay,and its distribution behavior. The water sampling was carried out during the ebb tide. The heavy metal concentration was then measured by using atomic absorption spectroscopy (AAS). In order to understand the water circulation behavior related to heavy metal distribution in the study area, thePrinceton Ocean Model was applied, and the model design was developed based ona scenario ofanopen canal in theeastern and western sides, while the center canal wasplaced withnet cages in the water column resembling the green mussel culture net. The observed heavy metal distribution showed an intensified concentration in the green mussel culture location. The observed water current also showed a reduced velocity in the location. The modeling approach could explain the water circulation behavior in response to the presence of net units in the water column. In this case, the density of net units for green mussel culture potentially produced shear stress in the water column, which affected the flow pattern and the distribution of heavy metals. Therefore, the existence of green mussel culture nets has a potential to become a trap for pollutant distribution in the water.
Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia Sulistiowati, Sulistiowati; Zamani, Neviaty Putri; Bengen, Dietriech Geofrfey; Lim, Cheng Ling; Cordova, Muhammad Reza
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 4 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.4.289-300

Abstract

Microplastics are recognized as common contaminants of coral ecosystem in Tidung Island, affecting both sediment and sea urchins residing in this environment. Therefore, this study aimed to determine the characteristics of microplastics found in sediment, the mouth, and the digestive system of sea urchins (Diadema sp.), assessing the relationship between coral cover percentage and microplastic type and size, and the transfer of microplastics from sediment to sea urchins. Sampling was conducted twice, namely in October 2021 and October 2022. Microplastics in sediments were extracted using ZnCl2. The destruction process of sea urchins used 30% H2O2 and FeSO4.7H2O, while the microplastics were identified with Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR).  The results showed that the microplastics found in the sediments and sea urchins were similar in terms of shape, color, size, and plastic polymers. The forms of microplastics found in this study were fibre, fragment, and foam with fibre predominance, based on the results obtained. The size of microplastics found in sediments and sea urchins was dominated by sizes >1000 µm. Fibres were found in hard coral (HC) and dead coral (DC) conditions while fragments and foams were present in turf algae (TA), sponge (SP), and soft coral (SC) conditions. The microplastics found in sea urchins originate in part from sediments because they have similar characteristics. Sea urchins ingested microplastics from sediment, particularly those grown by algae as a food source. The increase in the number of microplastics found in sediment could potentially result in higher abundance in the biota.
Effects of seasonal variation on the characteristics of stranded marine debris within Rambut Island Wildlife Reserve, Indonesia Rahman, Lucky; Zamani, Neviaty Putri; Ismet, Meutia Samira; Cordova, Muhammad Reza
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.v27i1.20655

Abstract

Monitoring and assessing the items stranded on shorelines is a crucial step in addressing the threat posed by marine debris to our ocean. The objective of this study is to examine the occurrence and categorize marine debris that accumulates on the beach and mangrove area of Pulau Rambut Wildlife Reserve from the transitional season 2 to the rainy season. The abundance of marine debris is significant in transitional season 2. There is no significant difference between different seasons. The dominant form of debris among all macrodebris categories during transitional season 2 was plastic, accounting for 46.38% of the total. Single-use plastics like styrofoam, shoes, sandals, gloves, plastic wrap, and plastic sachets were found to be the most common types of large-scale plastic debris, comprising 60% of total macroplastic debris. The debris found on Rambut Island is believed to originate from debris carried by rivers that flow into Jakarta Bay. The presence of seasonal winds, currents, waves, and tides further contribute to the accumulation of debris in this area.
Co-Authors Ahmad Muhtadi Alan Frendy Koropitan Arinda, Silke Bengen, Dietriech Geofrfey Dwi Hindarti, Dwi Isyrini, Rantih La Nafie, Yayu A. Lim, Cheng Ling Marzuki Ukkas, Marzuki Meutia Samira Ismet NEVIATY PUTRI ZAMANI Rachma Puspitasari Rahmadi Tambaru Rahman, Lucky Sulistiowati Sulistiowati Suratno Suratno Triyoni Purbonegoro, Triyoni Wahyudi, A'an J. Wahyudi, Aan J.