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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Maspari Journal Journal of Marine and Aquatic Sciences ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Omni-Akuatika Journal of Marine Research and Technology Journal of Aquaculture and Fish Health
Yulianto Suteja
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana, Bukit Jimbaran, Bali 80361
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science Immunology & microbiology Library & Information Science

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Journal : Journal of Marine Research and Technology

 1 
Tutupan Terumbu Karang pada Kedalaman Berbeda di Perairan Pantai Batu Sungu, Desa Les, Kabupaten Buleleng I Putu Dede Charles Dharma Saputra; IGB Sila Dharma; Yulianto Suteja; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i02.p07

Abstract

Bali island has many magnificent underwater coral reef gardens that attract tourists. Besides Pemuteran and Menjangan island waters, Batu Sungu water has also potential to be a new tourist destination. Thus, to determine the potency and management plan in Batu Sungu waters, this research aimed to examine the overall coral cover, coral growth forms, other benthic forms, and each of their components in 5 and 10 m depths. The overall coral cover, coral growth forms, other benthic forms, and each of their components were counted by using the Line Intercept Transect (LIT) method. Before collecting data, study sites were observed by using the Manta Tow method. Data were collected in 2 depths (5 dan 10 m) with 5 sites each (replicates) that separates within 50 to 150 m. A 25 m LIT was spread parallel to the coastline above the reefs. Live coral colonies, other benthic forms below the transects were measured for the number, length, and growth forms. Water quality was measured in situ (temperature, current, and clarity) and ex situ (pH). Results showed that the category of coral coverage in Batu Sungu water is "good” in 5 m and "moderate” in 10 m whereas there was no significant difference among each component of the overall coral cover. The most dominant coral growth form among the 2 depths was Coral Massive whereas significantly abundant in 5 m. Moreover, the number of Coral Foliose was found significantly high in the same depth. Other coral growth forms were relatively similar in numbers in two depths. As likewise, the cover of other benthic forms and its component were not significantly different among two depths, except Dead Coral with Algae which significantly plentiful in 5 m. Sand was dominantly found in two depths with no significant difference. Furthermore, Coraline Alga was only observed in 5 m, however, there were no Macroalga and Alga Assemblages found at this depth. It is assumed that the similarity number of the overall coral cover, coral growth forms, other benthic forms, and each of their components is related to the alikeness of water quality among the two depths.
Pemodelan Distribusi Nitrat di Kawasan Perairan Teluk Benoa I Made Dharma Raharja; I Gede Hendrawan; Yulianto Suteja
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1051.418 KB) | DOI: 10.24843/JMRT.2018.v01.i01.p05

Abstract

Benoa Bay is a highly regarded area by environmental conditions. Nitrate is important parameter for marine biota life. From previous research on nitrate contamination in Benoa Bay, the nitrate concentration has reached the standard condition of Bali Governor Regulation No. 16 of 2016 on Environmental Living Standard Quality and Living Standard Damage of 0,008 mg/L. Analysis previous researc still limited for surface water, so it is important to do more reasearch in water cloum of Benoa Bay. Research for nitrat constration can do whith observation data but the data observation need long time and many money. In this study using numerical modeling. The numerical modeler in this study is Finite Volume Coastal Ocean Model (FVCOM) which is modeled in 3-D. In the analysis of nitrate distribution in this study used the moemntum equations and advection-diffusion equations. From the model results for each condition the nitrate concentration at the surface of the Bay of Benoa is high in the western part of Benoa Bay and east of Benoa Bay. While in the water column of Benoa Bay the nitrate concentration tends to be influenced by the tidal elevation. The concentration nitrate is high in the low tide and the consectration nitrate is low in the high tide. The nitrate concentration from the surface to the bottom of the water have similar consentration.
Konsentrasi Klorofil-a dan Hubungannya dengan Pasang Surut di Selat Lombok Annassita Gianie; Yulianto Suteja; Widiastuti Karim
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.04 KB) | DOI: 10.24843/JMRT.2019.v02.i02.p07

Abstract

Lombok Strait is a strait located between Bali Island and Lombok Island that has a strong current and crossed by the main trajectory of Indonesian Throughflow (ITF). ITF is a current system that connects the Pacific and Indian Ocean. When mass water ITF passes through Indonesian waters, it mixes with other water masses, resulting in a mix of two water masses from two different oceans. These differences in water mass characteristics include temperature, salinity, DO, chlorophyll, and other tracers that can be used as an indicator of productivity. This can be determined based on the availability of chlorophyll-a concentrations. Chlorophyll-a is an active pigment in phytoplankton cells that has an important role on photosynthesis process. It is essential to know the temporal fluctuations of the chlorophyll-a concentrations at both high and low tide, and the correlation between chlorophyll-a and the water quality in the Lombok Strait. This research used primary data on chlorophyll-a and water quality parameter (DO, temperature, and salinity) and secondary data regarding tides on Port of Lembar. This research used CTD SBE 911+ as a measurement of instrument. The concentration of chlorophyll-a on CTD measurement of 0 m (0.011mg/l and 0.005) and for 10m of chlorophyll-a concentration (0.014mg/l and 0.006). The fluctuations of chlorophyll-a pattern during the tides showed that at low tide, the chlorophyll-a concentration is high, and vice versa. The chlorophyll-a was situated on a depth of 0 m and 10 m and was not affected by the water quality.
Co-Authors Abd. Rahman As-syakur Ade Riestiari Sudarmawan Afdal Afdal, Afdal Agus Atmadipoera Alan Frendy Koropitan Angginie Adjeng Ayoe Gigih Pangesthu Ani Haryati Anna Ida Sunaryo Purwiyanto Anna Ida Sunaryo Purwiyanto Anna Ida Sunaryo Purwiyanto Anna Ida Sunaryo Purwiyanto Anna Ida Sunaryo Purwiyanto Anna IS Purwiyanto Annassita Gianie Artha C. Rosevina Anak Ampun Barus, Beta Susanto Boiris Benet Sinaga Dadang Karmen Dietriech Geoffrey Bengen Dika Madyawan Dwi Budi Wiyanto Faisal Hamzah Fauziyah Fitri Agustriani Gede Surya Indrawan Gusti Diansyah Hanif Budi Prayitno Hasanuddin Parulian Sihombing I Dewa Nym. Nurweda P., I Gede Dananjaya Bagaskara I Gede Ening Sumantra I Gede Hendrawan I Gede Merta Yoga Pratama I Gede Surya Risuana I Gusti Agung Bagus Wisesa Sastra I Gusti Agung Gede Bayu Gita Damara I Gusti Bagus Sila Dharma I Gusti Ngurah Putra Dirgayusa I Kadek Vidyananda S Rahadiarta I Made Dharma Raharja I Made Putra Kresnabayu I Putu Dede Charles Dharma Saputra I Putu Ranu Fajar Maharta I Wayan Gede Astawa Karang Ira Fitriana Isnaini Isnaini Lilik Maslukah Lumban Nauli Lumban Toruan M AK Pirazuni Meiyerani, Jeni Melki Melki Mulia Purba Ni Kadek Dian Prinasti Ni Luh Eta Yuspita Ni Luh Novita Aryanti Ni Nyoman Desi Kusuma Dewi Ni Wayan Sukma Taraning Rahayu Novi Susetyo Adi, Novi Susetyo Purba, Sindi Krisanti Putra, I Nyoman Giri Putu Eddy Purna Wijaya Putu Maya Witariningsih Rastina, Rastina Riska Eka Putri Sabil Al Alif Sitorus, Rijal Suprabadevi Ayumayasari Saraswati Tiara Permata Sari TZ Ulqodry Wahyudi, A’an Johan Widiastuti Karim Widiastuti Karim Widiastuti Widiastuti Wike AE Putri Wike Ayu Eka Putri Yesie Rahayu Ananingtyas