IIS TRIYULIANTI, IIS
Balai Penelitian dan Observasi Laut, Balitbang KP-KKP, Perancak, Bali

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VERTICAL DISTRIBUTION OF NUTRIENTS ON TRANSITIONAL SEASON IN WEDA BAY, NORTH MALUKU Hamzah, Faisal; Basit, Abdul; Triyulianti, Iis
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 7, No 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v7i2.10991

Abstract

A vertical distribution of nutrient shows an interaction of physical processes, source, and uptake along the water column. These interactions can occur along the water column with different processes in each layer. Water samples from 17 stations were collected for nitrate, phosphate, and silicates concentration analyses during the transitional season in the Weda Bay. During the transitional season, the Weda Bay was characterized by low salinity (33.55-34.10), relatively warm temperature (30.87°C), and the relatively low nutrient concentrations (nitrate=0.03-4.87 µg at/l, phosphate=0.011-0.852 µg at/l, and silicate=0.04-1.21 µg at/l). The present of Western North Pacific Ocean (WNPO) watermass and the influence of Southern Subtropical Lower Water (SSLW) producing high salinity (>35) at the depth of 130-300 m were observed along the Weda Bay. Nutrient geochemical processes in this region were shown by nutrient utilization and regeneration across the water columns. Nutrients utilization was relatively high in the surface layer. Meanwhile, nutrients regeneration and remineralization were more dominant in the thermocline and deeper water layers. Analyses of nutrients showed that nitrate was more dominant than other nutrients with N/P ratio was 3.83-37.99 and N/Si ratio was 0.12-10.98. The effectiveness of silicate (0.25 ?g at/l) that was used by phytoplankton found at a depth of 200 m when its concentration decreased at N/P ratio (16:08) close to the Redfield ratio. Due to an uptake, remineralization, and regeneration processes in each layer, a nutrient distribution pattern was formed which the nutrient concentrations decreased in mixed layer and increased in the deeper water.Keywords:nutrien, pattern, Weda Bay, transitional season 
ANALISA BAKTERI PADA KARANG SCLERACTINIA BERKAITAN DENGAN FENOMENA LA-NINA DI KAWASAN TAMAN NASIONAL BUNAKEN AMPOU, EGHBERT ELVAN; TRIYULIANTI, IIS; NUGROHO, SUCIADY C.
Ecotrophic: Journal of Environmental Science Vol 7, No 2 (2012)
Publisher : Udayana University

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Abstract

Research about Scleractinian Coral with bacteria contamination are relatively new explore in Indonesia. The research study was located in Bunaken National Park in period May 2010 and August 2011. Research focused on gram positive ( +) and gram negative (-) bacteria. For sampling procedure by using SCUBA equipment with time swim at depth 5 - 10 meters at least 30 minutes and collected randomly coral mucus. In the Laboratory sample anlayzed by Isolate bactery process. For the result we noticed that on May 2010 gram positive bacteria are dominant, otherwise in August 2011 gram negative bacteria more dominant. Were indicated influence by La-Nina phenomenon during 2010 until earlier 2011 that seasonal transition I (May) and Monsoon II (August) is sigfnificantly different. For the future need to be explore especially to determine species of bactery and seasonal sampling.
The Marine Carbonate System at Maluku and Sulawesi Seas triyulianti, iis; Radiarta, I Nyoman; Yunanto, Agung; Pradistya, Novia Arinda; Islami, Fikhrul; Putri, Mutiara R
JFMR-Journal of Fisheries and Marine Research Vol 2, No 3 (2018): JFMR VOL 2 NO 3
Publisher : JFMR-Journal of Fisheries and Marine Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (637.187 KB) | DOI: 10.21776/ub.jfmr.2018.002.03.8

Abstract

Maluku and Sulawesi Seas are parts of Indonesian Large Marine Ecosystem in the east area which has an important role for Indonesian fisheries activities.  Those areas are facing the climate change phenomena that could change their marine ecosystem quality.  Marine carbonate system is very important for controlling the circulation of CO2 between the atmosphere and the ocean as well as regulating the pH value of waters. We conducted in situ measurement of marine carbonate system parameters (pH, Total Alkalinity, Total CO2 (TCO2) and pCO2) during IJEP cruise on September 2016 to analyses spatial variations of the marine carbonate system in the Northwest Monsoon period.  The results of marine carbonate system showed that in general Maluku and Sulawesi Seas are under super saturation of CO2 or acts as source of CO2 which have range value of sea surface partial of CO2(pCO2) between 280 – 500 µatm.  Spatial distribution of sea surface pH values measured with optical sensor at study sites showed varied between 8,03 – 8,15.  Measurement results of Total alkalinity (TA) by using titration method varied between 2300 – 2400 µmol/Kg meanwhile range value of TCO2 was 2300 – 2500 µmol/Kg at surface waterand it’s increased through the deep water with the range value of TCO2 was 2500 – 2800 µmol/Kg at deeper layer of water.Characteristic of marine carbonate system between Maluku  and Sulawesi Seas was different in the Southeast monsoon period indicates complex marine biogeochemistry processes influences those system.
PERGERAKAN ZONA KONVERGENSI DI SAMUDERA PASIFIK BAGIAN BARAT BERDASARKAN DATA INSITU DAN SATELIT Hamzah, Faisal; Susilo, Eko; Triyulianti, Iis; Setiawan, Agus
Jurnal Kelautan Nasional Vol 10, No 2 (2015): AGUSTUS
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3516.601 KB) | DOI: 10.15578/jkn.v10i2.6159

Abstract

Samudera Pasifik berperan penting dalam siklus El-Nino Southern Oscillation (ENSO) dan berpengaruh signifikan pada kegiatan penangkapan tuna di Indonesia, khususnya ikan Cakalang. Penelitian ini bertujuan mengetahui pola pergerakan zona konvergensi di Samudera Pasifik bagian Barat dengan mengamati pergerakan parameter oseanografi seperti suhu, salinitas, klorofil-a, dan produktivitas primer. Data parameter oseanografi tersebut terdiri dari data insitu, data satelit maupun hasil pemodelan. Hasil analisis menunjukan adanya pergerakan zona konvergensi di Barat Pasifik yang dicirikan variabel proksi yaitu isotermal 29°C, isohalin 34,6 psu, konsenrasi klorofil-a sebesar 0,1 mg/m3 dan NPP 300 mgC/m2/day. Pola pergerakan zona konvergensi baik secara horisontal maupun vertikal dipengaruhi oleh ENSO. Pada saat terjadi La-Nina massa air dengan suhu yang hangat bergeser ke arah Barat yang diikuti dengan meningkatnya kesuburan perairan. Pergerakan vertikal massa air hangat terjadi pada kedalaman 25-75 m (suhu) dan 50 m (salinitas). Namun pada saat El-Nino massa air hangat bergerak ke arah Timur Samudera Pasifik. Fluktuasi produksi tangkapan ikan Cakalang di perairan Indonesia Timur mengikuti pola pergerakan zona konvergensi tersebut. Peningkatan jumlah produksi ikan Cakalang di Kota Sorong meningkat seiring dengan keberadaan zona konvergensi di bagian Barat (La-Nina), namun di Propinsi Papua menunjukan pola sebaliknya.
BAKTERI ASOSIASI PADA KARANG SCLERACTINIA KAITANNYA DENGAN FENOMENA LA-NINA DI PULAU BUNAKEN Ampou, Eghbert Elvan; Triyulianti, Iis; Nugroho, Suciadi C.
Jurnal Kelautan Nasional Vol 10, No 2 (2015): AGUSTUS
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.929 KB) | DOI: 10.15578/jkn.v10i2.6157

Abstract

Penelitian tentang karang keras (Scleractinian coral) yang terkontaminasi bakteri relatif masih kurang dilakukan khususnya di perairan Indonesia. Untuk itu dilakukan kegiatan penelitian di Taman Nasional Bunaken pada dua periode yakni Mei 2010 (musim peralihan I)  dan Agustus 2011 (Monsoon II). Penelitian ini difokuskan pada kontaminasi bakteri gram positif (+) dan gram negatif (-). Metode yang dilakukan untuk pengambilan sampel di lapangan adalah time swim dimana menyelam  pada kedalaman 5-10 meter selama kurang lebih 30 menit dan mengambil sampel mucus karang secara acak/random dengan menggunakan siring atau mengambil sampel secara langsung pada karang (fraksi cabang) pada lokasi yang sama. Sampel dianalisis dengan proses isolasi bakteri di laboratorium. Hasil penelitian menunjukkan bahwa pada  Mei 2010 bakteri gram positif lebih mendominasi dari gram negatif, sebaliknya Agustus 2011 bakteri gram negatif yang lebih dominan dari gram positif.  Indikasi faktor penyebab terjadinya bakteri gram positif yang lebih dominan khususnya di tahun 2010  ialah fenomena La-Nina yang terjadi selama periode tersebut. Perubahan suhu rata-rata yang terjadi pada kedua musim tersebut menjadi salah satu faktor yang merangsang pertumbuhan kedua kelompok bakteri ini.  Perlu dilakukan penelitian lebih lanjut khususnya dalam menentukan jenis bakterinya dan pengambilan sampel pada setiap musim.
PROFIL VERTIKAL KANDUNGAN OKSIGEN TERLARUT DAN FLUORESENCE IN VIVO SEBAGAI INDIKATOR KEBERLANGSUNGAN KEHIDUPAN DI PERAIRAN LAUT MALUKU DAN LAUT SULAWESI triyulianti, iis; Hermawan, Indra; Yunanto, Agung; Pradisty, Novia Arinda; Raymonza, Aditya Chandra; Islamy, Fikrul; Magdalena, Nadia Christa
Jurnal Kelautan Nasional Vol 12, No 2 (2017): AGUSTUS
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1075.405 KB) | DOI: 10.15578/jkn.v12i2.6222

Abstract

Indeso Joint Expeditions Cruise (IJEP) activity in 2016 measured some water quality parameters, one of them are dissolved oxygen and in vivo fluorescence for expressing biomass of phytoplankton community.Those parameters were measured for analyzing the important component of marine biogeochemical cycle used the titrimetric method and optical sensor.  Expedition of  IJEP was conducted on September 5-15, 2016 from the port of P2LD-LIPI Ambon into Bitung port, North Sulawesi. Measurement results of Dissolved Oxygen (DO) at 21 stations showed varied values vertically and horizontally.  Vertical distribution of DO and fluorescence were measured at seven of depth water (10, 50, 60-150, 300, 500, 750 dan 1000 meter).  Distribution of DO decreased through ocean inventory with its range values was 3,334 – 7,321 mg/L.  Depletion of dissolved oxygen from surface layer into the upper of thermocline layers (50 – 400 meter).  The concentration of DO decreased after chlorophyll maximum layer (represent as in vivo fluorescence) at different of depth water with its range value was 0,4441 – 1,1376 mg/m3. The concentrations of dissolved oxygen were higher both vertically and horizontally in Sulawesi Sea than in Maluku Sea at this transitional season (September 2016) but inversely condition for the in vivo fluorescence in which it’s higher in Maluku Sea. There was an indication of internal upper water mass impacts on the highest concentration of in vivo fluorescence in Maluku Sea. These results indicate that Maluku Sea and Sulawesi Sea have the carrying capacity of the ecosystem for sustainability of their marine life.