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OSEANA
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 02161877     EISSN : 27147185     DOI : -
Core Subject : Science, Education, Social,
Biochemistry, Genetics & Molecular Biology Environmental Science Other
OSEANA adalah jurnal elektronik nasional yang menerbitkan artikel ilmiah yang bersumber dari penelitian maupun artikel penelaahan pustaka dalam bidang oseanografi di Indonesia. Tujuan dari penerbitan OSEANA adalah untuk memberikan informasi kepada masyarakat yang berminat terhadap bidang oseanologi yang meliputi kegiatan, perkembangan, serta hasil-hasil yang telah dicapai oleh Pemerintah Indonesia khususnya di bidang kelautan. Penerbitan jurnal ini dikelola oleh Pusat Penelitian Oseanografi LIPI dan diterbitkan dua kali setahun di bulan April dan Oktober. Redaksi menerima sumbangan karya yang behubungan dengan ilmu kelautan (oseanografi biologi, oseanografi fisika, oseanografi kimia, oseanografi geologi, dan bidang-bidang terkait lainnya) yang bersifat ilmiah. Redaksi juga menerima tulisan dari ahli/penulis dari luar Pusat Penelitian Oseanografi LIPI.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Oseanografi
Articles 6 Documents
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Search results for , issue "Vol 42 No 2 (2017)" : 6 Documents clear
PEMANASAN GLOBAL, EKSPLOITASI SUMBERDAYA PERIKANAN, DAN PENCEMARAN PESISIR SEBAGAI PENYEBAB UTAMA PERUBAHAN EKOLOGI LAUT DI INDONESIA Hadiyanto Hadiyanto
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.41

Abstract

GLOBAL WARMING, OVERFISHING, AND COASTAL POLLUTION AS MAJOR CAUSES OF MARINE ECOLOGICAL CHANGES IN INDONESIA. Changes in marine ecology are normal, because the earth is dynamic, and are getting worse and faster since human are involved in their processes, indicating the Anthropocene Era begins. Consequently, three parameters to measure the quality of the earth for living, i.e. climate changes, rate of biodiversity loss, and nitrogen cycles, have been over the maximum thresholds. In general, changes in marine ecology are caused by phenomena that are occuring in global scale (e.g. increasing of CO emission, global warming, and ocean acidification), regional scale (e.g. overfishing, and changes in oceagraphical processes, rain and storm), and local scale (e.g. eutrophication, sedimentation, pollution, biological invasions, herbivory, and diseases). Result of reviews shows that major causes of changes in marine ecology in Indonesia may be global warming, overfishing, and coastal pollution. As a result, species richness, abundance, distribution, and community structure of marine ecosystems in Indonesia change significantly.
FAKTOR-FAKTOR YANG MEMPENGARUHI TOKSISITAS BAHAN PENCEMAR TERHADAP ORGANISME PERAIRAN Triyoni Purbonegoro
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.43

Abstract

FACTORS THAT AFFECTING THE TOXICITY OF POLLUTANTS TO AQUATIC ORGANISMS. There are a large number of pollutants in aquatic environment with various characteristics and factors that can modify and affect the toxicity of pollutants in this environment. The major factors affecting pollutant toxicity include physicochemical properties of pollutants, mode of exposure, time, environmental factors, and biological factors. Moreover, organisms in an aquatic ecosystem are seldom exposed to only single pollutant, and most cases the stress of pollution on aquatic ecosystems is related to the interaction and combined effects of many chemicals. The combined effects may be synergistic or antagonistic, depending on the pollutants and the physiological condition of the organism involved.
ASESMEN EUTROFIKASI PERAIRAN PESISIR MENGGUNAKAN METODE INDEKS TROFIK (TRIX) Hanif Budi Prayitno
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.44

Abstract

EUTROPHICATION ASSESSMENT METHOD FOR COASTAL WATER USING TROPHIC INDEX (TRIX). Eutrophication, a process in which water bodies experience excessive growth of aquatic plants due to accumulation of land-originated nutrients especially phosphorus and nitrogen, has become a worldwide coastal environmental problem. Its negative impacts have been well known including oxygen depletion, harmful algal blooms, biodiversity reduction and ecosystem degradation. Unfortunately, the occurrence of those impacts is often not well anticipated as the instruments for assessing the quality of coastal and marine environment are weak and hardly available. Therefore, there has been a growing concern in developing appropriate methods for assessing coastal and marine eutrophication. One of the most widely used methods is trophic index (TRIX) due to its good efficacy. However, it is still questionable whether TRIX is a universal index of eutrophication or the scaling of TRIX should be region specific.
PENERAPAN TEKNOLOGI HIDROAKUSTIK DI BIDANG ILMU DAN TEKNOLOGI KELAUTAN Muhammad Zainuddin Lubis; Ganda Surya; Kasih Anggraini; Husnul Kausarian
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.45

Abstract

APPLICATION OF FIELD HYDROACOUSTIC TECHNOLOGY FOR MARINE SCIENCE AND TECHNOLOGY Utilization hydroacoustic methods in recent years have become increasingly effective for estimating the abundance of marine fish, especially fish stocks, where is impossible to do with conventional methods approach. Widely hydroacoustic technology has been used to map and classify the content of the resource base of waters and benthic animals that are on the bottom, type of substrate and benthic biota. Target Strength (TS) is the most important factor in the detection and prediction of fish stocks by using hydroacoustic. The TS is a measure that can describe the ability of a target to reflect sound waves that come about it. In the propagation of sound waves, the amount of energy per second will be flowing through the unit certain area perpendicular to the direction of propagation. The amount of energy per second crossing a certain area of the unit refers to as the intensity of the wave. The system of detection and measurement of underwater involves three components, namely medium, targets, and equipment. Sonar equation is built based on the similarity or balance between the parts of the received signal, the desired (called signal) and the unwanted parts (referred noise or noise), depending on the specific sonar functions are applied.
IMPACTS OF SEDIMENTATION ON STONY CORALS Tri Aryono Hadi
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.46

Abstract

PENGARUH SEDIMENTASI PADA KARANG KERAS. Aktivitas manusia baik di darat maupun di laut membawa banyak pengaruh negatif terhadap ekosistem laut. Terumbu karang yang utamanya disusun oleh karang keras mengalami degradasi akibat turunnya kualitas perairan, terutama akibat sedimentasi dan eutrofikasi. Secara umum hal ini akan menyebabkan menurunnya kelimpahan dan diversitas karang batu, dan secara khusus akan memengaruhi proses fisiologis karang. Proses fotosintesis menurun sebagai imbas dari menurunnya penetrasi cahaya akibat tingginya turbiditas dan sedimen yang menempel di permukaan karang. Untuk menanggulangi defisit energi, maka karang meningkatkan aktivitas menangkap makanan sekaligus proses respirasi. Reproduksi dan rekruitmen juga akan menurun seiring rusaknya sperma karang dan tertutupnya substrat untuk perlekatan larva. Sedimen juga akan memicu penyakit karang karena produksi mukus yang berlebihan. Pengkayaan nutrien di laut akan meningkatkan proses fotosintesis sebagaimana tersedianya senyawa anorganik yang penting untuk transfer energi dan kandungan dari zooxanthellae, namun apabila berlebihan akan menimbulkan gangguan pada proses reproduksi dan meningkatkan wabah penyakit karang. Meskipun karang mampu merespon gangguan tersebut, untuk jangka waktu yang panjang akan menimbulkan effek yang mematikan. Oleh karena itu perlu dilakukannya evaluasi mengenai aktivitas manusia disekitar wilayah pesisir untuk meminimalisir dampak negatif pada ekosistem pesisir.
CIRCULAR TANK DESIGN AND FUNCTION IN RECIRCULATING AQUACULTURE SYSTEM (RAS) Supono Supono
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.47

Abstract

DISAIN DAN FUNGSI TANGKI BULAT DALAM SISTEM BUDIDAYA TERESIRKULASI. Kegiatan budidaya telah berkembang pesat dalam hal teknologi dan teknik budidaya dalam rangka meningkatkan hasil produksi. Salah satu teknologi penting adalah desain tanki yang digunakan dalam kegiatan budidaya terutama pada sistem budidaya resirkulasi. Tanki bulat memiliki beberapa keuntungan dan spesifikasi yang lebih luas dibandingkan dengan jenis tanki yang lain. Dari segi desain dan fungsinya, tanki bulat dapat di gunakan untuk budidaya berbagai jenis ikan. Tulisan ini bertujuan untuk menjelaskan desain dan fungsi dari tanki bulat terutama bagaimana memilih ukuran tanki yang sesuai dengan kebutuhan, bagaimana menginstalasi saluran air masuk dan keluar, bagaimana proses mekanisme self cleaning (mekanisme pembersihan tank secara otomatis) dan kekurangannya dalam kegiatan budidaya.

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