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Hambur Balik Akustik Permukaan Substrat Dasar Perairan Menggunakan Echosounder Bim Tunggal Baigo Hamuna; Lisiard Dimara; Sri Pujiyati; Nyoman Metta N. N. Natih
Jurnal Sumberdaya Akuatik Indopasifik Vol 1 No 2 (2017): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (939.749 KB) | DOI: 10.30862/jsai-fpik-unipa.2017.Vol.1.No.2.31

Abstract

The objectives of this research are to analyze the surface backscattering strength of seabed. The single beam echosounder Simrad EK15 with 200 kHz of frequencies was used for recordings of seabed acoustic backscattering. Data collection was conducted in April 29 – Mei 2 2017 which located in the Yos Sudarso Bay, Jayapura, Papua Province. Sampling substrate was taken for ground truth data using sediment grab. The results show that average value of surface backscattering strength of sand varied between -37.48 dB up -36.03 dB, and mud varied between -46.98 dB up -45.15 dB. It shows also that sand has a high substrate roughness, hardness, and grain size larger than the type of mud substrate. In acoustic backscattering values of sand were greater than mud.
POTENSI RENDAMAN TSUNAMI DI WILAYAH LEBAK BANTEN Dedi Sugianto; I Wayan Nurjaya; Nyoman MN Natih; Wahyu W Pandoe
Jurnal Kelautan Nasional Vol 12, No 1 (2017): APRIL
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1453.383 KB) | DOI: 10.15578/jkn.v12i1.6241

Abstract

Studi ini mengkaji tentang potensi bahaya tsunami yang terjadi di pesisir pantai Lebak Banten. Zona subduksi di selatan Jawa merupakan wilayah yang menarik untuk dipelajari, karena didalam zona ini berpotensi terjadi gempabumi yang dapat menyebabkan terjadinya tsunami. Wilayah Kabupaten Lebak Banten terletak di bagian selatan Jawa Barat dan berhadapan dengan sumber  tsunami di Samudra Hindia. Tujuan penelitian ini adalah untuk mengetahui run- up yang terjadi akibat tsunami dari gempabumi di celah kegempaan (seismic gap) sekitar Palung Jawa, menghitung waktu tempuh yang diperlukan oleh tsunami tersebut hingga mencapai wilayah pesisir Lebak Banten dan mengetahui potensi rendaman di wilayah tersebut.  Metode yang digunakan dalam penelitian ini meliputi simulasi skenario tsunami dari gempa bumi dengan kekuatan 8,7 SR dengan menggunakan model TUNAMI-N2 dan analisis hasil keluaran model. Berdasarkan analisis hasil simulasi menggunakan TUNAMI-N2 tersebut, run-up yang dapat terjadi akibat tsunami dari gempa bumi di celah kegempaan sekitar Palung Jawa umumnya mengikuti pola topografi ketinggian wilayah. Waktu tempuh yang diperlukan oleh gelombang tsunami pertama hingga mencapai wilayah pesisir Lebak berkisar antara 15 hingga 17 menit. Potensi rendaman tsunami wilayah pesisir Lebak jika terjadi gempabumi di celah kegempaan sekitar Palung Jawa pada umumnya terdapat  pada kategori sangat berbahaya mengingat tinggi run-up dapat mencapai lebih  dari 3 meter dari permukaan dan jarak maksimum rendaman mencapai 1,7 km dari garis pantai, dengan luas genangan 1271,34 ha.
Distribusi Target Strength Ikan Demersal Berdasarkan Deteksi Hidroakustik di Perairan Teluk Youtefa, Kota Jayapura Sri Pujiyati; Baigo Hamuna; Lisiard Dimara; Nyoman Metta N Natih
Jurnal Kelautan Nasional Vol 15, No 3 (2020): Desember
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (418.29 KB) | DOI: 10.15578/jkn.v15i3.7181

Abstract

Teluk Youtefa merupakan perairan yang potensial untuk penangkapan ikan demersal, terutama oleh nelayan lokal di sekitar Teluk Youtefa. Survei hidroakustik dilakukan untuk mengetahui distribusi target strength (TS) dan menduga ukuran panjang ikan demersal di perairan Teluk Youtefa. Perekaman data hidroakustik dilakukan sepanjang cruise track dengan menggunakan echosounder single beam SIMRAD EK-15 frekuensi 200 kHz. Analisis data menggunakan software Echoview 4.8, dengan threshold antara -34 sampai -70 dB dan ESDU (Elementary Sampling Distance Unit) adalah 100 ping. Ikan demersal pada penelitian ini merupakan ikan yang terdeteksi pada jarak maksimum 3 m dari dasar perairan. Hasil penelitian menujukkan bahwa ikan demersal yang terdeteksi sebanyak 27 schooling yang tersebar pada kedalaman 3,24 sampai 33,44 m. Ikan demersal yang terdeteksi dominan pada kedalaman maksimum 10 m sebanyak 21 schooling. Nilai TS rata-rata ikan demersal berkisar antara -69,58 sampai -45,87 dB. Berdasakan nilai TS yang diperoleh, ikan demersal di perairan Teluk Youtefa didominasi kelompok ikan berukuran kecil. Distribusi ikan demersal di perairan Teluk Youtefa sangat dipengaruhi oleh kedalaman perairan dan tipe substrat dasar perairan.
Hutan mangrove di Pulau Ternate secara spasial dan temporal Rustam E Paembonan; M Djanib Achmad; Ikbal Marus; Sartini Baddu; Amirul Karman; Najamuddin Najamuddin; Nebuchadnezzar Akbar; Nyoman Metta N Natih; Irmalita Tahir; Eko S Wibowo; Darmiyati Muksin; Neviaty P Zamani; Firdaut Ismail
Jurnal Ilmu Kelautan Kepulauan Vol 5, No 2 (2022): Jurnal Ilmu Kelautan Kepulauan
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jikk.v5i2.5687

Abstract

Potensi Sumber dan Sebaran Sampah Laut di Ekosistem Terumbu Karang Perairan Pulau Kelapa, Pulau Kelapa Dua, dan Pulau Harapan, DKI Jakarta Muhamad Gilang Arindra Putra; Neviaty Putri Zamani; Nyoman Metta N. Natih; Amir Yarkhasy Yuliardi
Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i02.p09

Abstract

Pollution is a threat to coral reefs in Indonesian waters. The number of coral reefs that are in very good condition denies very little compared to the total area of ??coral reefs in Indonesia. One form of pollution that can threaten coral reefs is marine debris. This study aims to identify potential sources of marine debris that can disrupt the health of coral reefs. the research was carried out in the waters of Kelapa Island, Kelapa Dua Island and Harapan Island, DKI Jakarta. The data used includes current data obtained using secondary data, data on the amount of marine debris,and the water base data substrate obtained using the LIT method. The results showed that the waste was thought to come from community activities, tourism and fisheries. The location that can be a source of marine debris in the research location comes from the mainland of Jakarta Bay. The bottom substrate conditions are in the "bad" to "medium" category. The range of the lowest proportion of live coral cover is 10,8% and the highest live coral cover at 31.1%. The coral reefs in the research location are in a state of worry and their existence is threatened by pollution of marine debris.
IDENTIFIKASI BERBAGAI JENIS SAMPAH LAUT DAN PENGELOLAANNYA BERSAMA MASYARAKAT PULAU TIDUNG, KEPULAUAN SERIBU Sri Pujiyati; Endang Sunarwati Srimariana; Dea Fauzia Lestari; Riza Aitiando Pasaribu; Mochamad Tri Hartanto; Nyoman Metta Natih; Rastina Rastina; Steven Solikin; Erwin Maulana
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 8 No. 1 (2024): Jurnal Panrita Abdi - Januari 2024
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v8i1.22001

Abstract

Tidung Island is one of the islands in the Seribu Island area which has marine tourism destinations. To declare the achievement of SDGs no. 6 (Clean water and sanitation) and 14 (Life Below Water), then one of the community service activities (PPM) that can be done is cleaning garbage in the coastal areas. This activity aims to be directly involved in cleaning up garbage on Tidung Island. The method used was going directly to the field as well as conducting direct observations and interviews to find out the sources and types of existing waste and waste management that is already running. The result of this PPM activity is a clean beach on Tidung Island. This activity was carried out to get Tidung Island’s coast clean and healthy so that SDGs no. 6 and 14 can be reached. The results of community service activities show that the community is enthusiastic to carry out waste management independently and with related officers to create the Tidung Island area as marine tourism.  ---  Pulau Tidung adalah salah satu pulau di daerah Kepulauan Seribu yang memiliki destinasi wisata bahari. Dalam rangka mencanangkan capaian SDGs no. 6 (Clean water and sanitation) dan 14 (Life Below Water) maka salah satu kegiatan pengabdian pada masyarakat yang dapat dilakukan adalah pembersihan sampah di wilayah pesisir. Kegiatan ini bertujuan untuk terlibat langsung dalam membersihkan sampah di Pulau Tidung. Metode yang digunakan adalah turun langsung di lapangan sekaligus melakukan pengamatan langsung dan wawancara untuk mengetahui sumber dan macam sampah yang ada serta pengelolaan sampah yang sudah berjalan. Hasil berkegiatan PPM ini yaitu membersihkan pantai di Pulau Tidung.  Kegiatan ini dilakukan untuk mendapatkan pantai Pulau Tidung yang bersih dan sehat sehing-ga dapat tercapainya SDGs no. 6 dan 14. Hasil kegiatan pengabdiam masyarakat menunjukkan masyarakat bersemangat untuk melakukan pengelolaan sampah secara mandiri maupun bersama petugas terkait untuk menciptakan kawasan Pulau Tidung sebagai wisata bahari.
Relationship Between Characteristics of Marine Debris and Impact to Coral Reef Muhamad Gilang Arindra Putra; Neviaty Putri Zamani; Nyoman Metta Natih; Syawaludin Alisyahbana Harahap
Jurnal Ilmiah Perikanan dan Kelautan Vol. 13 No. 1 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v13i1.18896

Abstract

HighlightMarine debris can be as a treat for coral reefBranching coral is the most affected by marine debrisPlastic marine debris commonly found in all research location, especially from fisheries and daily activityAbstractA coral reef is one of the important ecosystems, however, the existence of coral reef is threatened. Several factors can be a threat to the coral reef, such as marine debris. Research about marine debris on coral reefs in Indonesia has not much been done. This research aims to identify marine debris that is found and impacted, to identify the impacts caused, and to identify the life forms most susceptible to being affected. This research was conducted in Kelapa Island, Kelapa Dua Island, and Harapan Island by using the Belt Transect method sized 20 x 4 m2 with four repetitions at each station to determine coral reef life form, and type of marine  debris. The data was analyzed by using the Correspondence Analysis (CA) to determine the correlation of marine debris and the affected life forms of coral reefs. The result showed the plastic marine debris was found in all stations. Six life forms were affected by marine debris, and the most susceptible life forms that affected were massive and branching. The most dominant impact category on coral reefs was tissue loss with algal growth (TLAG).
Relationship Between Environmental Parameters and Manta Ray Occurrence in Raja Ampat Archipelago, Indonesia Runtuboi, Ferawati; Bengen, Dietriech Geoffrey; Nurjaya, I Wayan; Natih, Nyoman Metta N; Zulfikar, Andi; Beale, Calvin S.
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 1 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.1.37-47

Abstract

Understanding the influence and impact of environmental factors on manta ray sightings is critical to understanding the spatial and temporal ecology of a highly mobile species. Therefore, this study aims to determine the influence and impact of environmental factors as indicated by the parameters of wind speed, chlorophyll-a, SST, salinity, pH, dissolved oxygen, and the number of phytoplankton and zooplankton species. The mapped chlorophyll-a was re-analyzed based on the seasonal period throughout 2021 downloaded from marine copernicus and analyzed by kriging method. The influence and effects of environmental parameters on the short-term appearance of eye rays were studied using an adaptive model (GAM). The analysis showed a significant influence of environmental factors on manta ray sightings in Raja Ampat, namely Calanoid spp, Oithona nana, Acartia clausi, Calanus helgoladicus, and Oithona brevicornis. Based on this model, zooplankton is an important parameter that can describe the influence of environmental parameters on manta ray sightings at observation points in Raja Ampat MPA. The results of the reanalysis of chlorophyll-a concentrations were highest in the eastern to transitional seasons, which were scattered on the west side of Raja Ampat waters. Meanwhile, chlorophyll-a concentrations were low in the west to transitional season on the east side. This mechanism may drive the foraging strategy of manta rays, which visit shallow waters where zooplankton density and biomass are abundant. Adopting the BHS MPA network concept, as it has been implemented, would be in line with broader conservation expectations for the sustainability of manta rays in Raja Ampat.
Analisis Karakteristik Marine Debris Terhadap Persentase Tutupan Terumbu Karang di Perairan Wangi-Wangi Taman Nasional Wakatobi Husmayani, Wa Ode; Zamani, Neviaty Putri; Ismet, Meutia Samira; Natih, Nyoman Metta N.; Sallatu, Muh Ashry
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.v27i2.23052

Abstract

Based on data from the OECD's Global Plastic Outlook (2022), marine debris in the world has reached 350 million tons, which dominates plastic waste. Indonesia is the second country after Tingkok which produces the most marine debris. Based on the results of the National Waste Management Information System data from the Ministry of Environment and Forestry (Ministry of Environment and Forestry) it shows that Indonesia produces 34.85 million tonnes of landfilled waste. Of the total, 12.13 million tonnes of waste per year is not managed in 2022. The President of the Republic of Indonesia, Mr. Joko Widodo, is very concerned and committed to the waste problem and has a target to reduce marine plastic waste by 70% by 2025 in order to achieve the target set by the President of the Republic of Indonesia. Therefore, research on marine debris in coastal areas and small islands in Indonesia is very important information to research. This research was conducted in Wangi-Wangi Waters, Wakatobi Regency on 12-15 September 2023. The aim was to determine the type, abundance and weight of marine debris and its relationship with coral cover in Wangi-Wangi Waters. The marine debris sampling method is based on two characteristics, namely the intertidal zone (sandy beach) using the shoreline survey methodology and the subtidal zone (coral reef ecosystem) using the Belt Transect method (KLHK, 2020). ). Marine debris macro criteria range from (>2.5 cm - <1 m) Based on research results, the dominant abundance of macro marine debris was found to be 187 items/m2 of plastic, followed by wood and its derivatives 162 items/m2, glass 17 items/m2, cloth and its derivatives 12 items/m2 , fiber 12 items/m2, and rubber 8 items/m2. The total weight of macro marine debris in the intertidal zone is 574.10 grams/m2 and the subtidal zone is 178.7 grams/m2. Data on live coral cover ranges from 54.33% to 73.07%, good criteria. The relationship between the abundance of macro marine debris and coral cover has an inverse relationship, the higher the live coral cover, the lower the abundance of macro marine debris in that area. Berdasarkan data OECD’s Global Plastic Outlook (2022) marine debris di dunia telah mencapai sebesar 350 juta ton yang mendominasi sampah plastik. Indonesia menjadi negara peringkat kedua setelah tingkok penghasil marine debris terbanyak. Berdasrakan hasil data sistem informasi pengelolaan sampah Nasional dari KLHK (Kementrian Lingkungan Hidup dan Kehutanan) menunjukan bahwa Indonesia  mengahsilkan 34.85 juta ton timbunan sampah dari total tersebut 12.13 juta tonsampah per tahun sampah tidak di kelola pada tahun (2022). Presiden RI Bapak Joko widodo sangat konsen dan berkomitmen dengan permasalahan sampah dan memiliki target untuk menurunkan sampah plastik laut sebanyak 70% pada tahun 2025 dalam rangka mencapai target yang telah ditetapkan oleh presiden RI. Oleh karena itu maka penelitian marine debris di wilayah pesisir dan pulau-pulau kecil Indonesia merupakan suatu informasi sangat penting untuk diteliti. Penelitian ini dilakukan di Perairan Wangi-Wangi, Kabupaten Wakatobi pada 12-15 September 2023. Bertujuan untuk mengetahui jenis, kelimpahan,dan berat marine debris serta hubungannya dengan tutupan terumbu karang di Perairan Wangi-Wangi. Metode pengambilan sampel marine debris berdasarkan dua karakteristik yaitu zona intertidal (pantai berpasir) menggunakan metode survei garis pantai (shoreline survey methodology)dan zona subtidal (ekosistem terumbu karang) menggunakan metode Belt Transect atau transek sabuk (KLHK, 2020. Kriteria makro marine debris berkisar (>2.5 cm - <1.0 m)  Berdasarkan hasil penelitian kelimpahan macro marine debris yang dominan ditemukan yaitu jenis plastik sebanyak 187 item/m2, diikuti kayu dan turunannya 162 item/m2, kaca 17 item/m2, kain dan turunannya 12 item/m2, fiber 12 item/m2, dan karet 8 item/m2. Berat total macro marine debris pada zona intertidal sebesar 574.10 gram/m2 dan zona subtidal sebesar 178.7 gram/m2. Data tutupan karang hidup berkisar 54.33%-7307% kriteria baik. Hubungan kelimpahan macro marine debris dengan tutupan karang memliki hubungan yang berbanding terbalik, semakin tinggi tutupan karang hidup maka semakin rendah maka kelimpahan macro marine debris pada area tersebut.
Analysis of Mangrove Leaf Litter Decomposition Rate in Mangrove Ecosystem of Muara Pagatan, South Kalimantan Selviani, Selviani; Zamani, Neviaty Putri; Natih, Nyoman Metta N; Tarigan, Nurhayati
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.v27i1.21913

Abstract

Mangroves are the dominant ecosystem in coastal areas and estuaries and one of the most productive ecosystems in the world. Mangroves are an essential component in a complex food chain and have the potential for the life of various marine and terrestrial biotas, microorganisms, and macroorganisms. The decomposition of mangrove leaf litter by fungal bacteria produces nutrient source that is beneficial for fish, shrimps, and crabs. This study discusses the production and decomposition rate of mangrove leaf litter in the mangrove ecosystem of Muara Pagatan, South Kalimantan. With transect and litter trap methods, litter production during the observation ranged from 218.51 - 858.28 g/m2/45day. Of the four types of mangroves found, the highest litter production was found in Rhizophora mucronata mangrove species at 858.28 g/m2/45day, followed by Bruguiera gymnorrhiza species at 268.52 g/m2/45day, and the lowest litter production was Avicennia marina mangrove species at 222.9 g/m2/45day and Sonneratia alba at 218.51 g/m2/45day. The remaining dry weight during observation ranged from 1.06 g - 2.46 g. In sum, the highest litter productivition and decomposition rate was found in Rhizophora species and litter was not completely decomposed after 45 days.
Co-Authors Abdul Motalib Angkotasan Abdurrachman Baksir, Abdurrachman Abjan Ibrahim, Abjan Achmad, M Djanib Achmad, M. Djanib Agus Atmadipoera Amir Yarkhasy Yuliardi Anggraini, Nurlita Putri Asep Sandra Budiman, Asep Sandra Aziz, Nasrul Baddu, Sartini Baigo Hamuna Baigo Hamuna Baigo Hamuna Baigo Hamuna Baigo Hamuna Beale, Calvin S. Beginer Subhan Bemba, Jefri Bisman Nababan Darmiyati Muksin Daud, Asmar Hi Dea Fauzia Lestari, Dea Fauzia Dedi Sugianto Dietriech Geoffrey Bengen Dondy Arafat Eko S Wibowo Endang Sunarwati Srimariana Erwin Maulana Ferawati Runtuboi Firdaut Ismail Gentio Harsono Harahap, Zulhan Arifin Husmayani, Wa Ode I Wayan Nurjaya Ikbal Marus Ikbal Marus, Ikbal Imanditya, Muhammad Fachriza Indra Jaya Indra Jaya Indra Jaya Irmalita Tahir Irmalita Tahir, Irmalita Ismail, Firdaut Joko Santoso Jonson Lumban Gaol Karman, Amirul Karman, Amirul Kentaro Ando Khairunnisa Khairunnisa Kotta, Raismin Krisna Rendi Awalludin Leica Febby Shafitri Lisiard Dimara Mario Putra Suhana Marlis Yulianto Meutia Samira Ismet Mochamad Tri Hartanto Muhamad Gilang Arindra Putra Muhamad Gilang Arindra Putra Muhamad Muliadi Muhammad Agus Muljanto Munru, Maestro Mutmainnah Mutmainnah Najamuddin N Najamuddin Najamuddin, Najamuddin Nebuchadnezzar Akbar Neviaty P Zamani NEVIATY PUTRI ZAMANI Neviaty Putri Zamani Paembonan, Rustam E Prayoga, Bintang Rahimah, Insaniah Rahman Rahman Rasidi, Rasidi Rastina Rastina Ratuluhain, Eva Susan Rika Anggraini Risandi Dwirama Putra RITA ANDINI Riyadi Subur, Riyadi Riza Aitiando Pasaribu Ruslan Husen Saban Tawari Rustam E Paembonan Rustam Effendi Paembonan, Rustam Effendi Sallatu, Muh Ashry Salnuddin Salnuddin, Salnuddin Salnuddin, Salnudin Sartini Baddu Selviani, Selviani Septy Heltria Siolimbona, Abdul Ajiz Sri Hadianti Sri Pujiyat Sri Pujiyati Steven Solikin Suhaemi Suhaemi, Suhaemi Syamsul Bahri Agus, Syamsul Bahri Syawaludin Alisyahbana Harahap Taj, Kemal Tarigan, Nurhayati Wahab, Iswandi Wahyu W Pandoe Wibowo, Eko S Zulfikar, Andi Zulham Apandy Harahap